Full Stack Software Engineer at Chalk Inc. | New York or San Francisco

About Chalk Inc.Chalk Inc. is at the forefront of revolutionizing machine learning applications through our cutting-edge data platform. We dismantle traditional barriers of complexity, latency, and scalability that have historically hindered ML capabilities. Our platform pairs the speed of Rust with user-friendly tools that developers adore. Trusted by leading companies, Chalk is instrumental in initiatives ranging from preventing fraudulent credit card transactions to optimizing clean energy usage. Recently, we secured a $50 million Series A funding led by Felicis.About the RoleWe are actively seeking skilled Software Engineers to join our dynamic team. This is a unique opportunity to become an early employee and significantly contribute to our rapidly growing startup. You will engage with challenging engineering problems while enjoying a high level of autonomy and ownership.Work EnvironmentOur team is in the office five days a week, and while we are flexible with unavoidable conflicts, this is not a hybrid role.Who We Are Looking ForWe seek software engineers who excel in tackling business challenges across all layers of the software stack. At Chalk, we create reliable data processing systems that perform exceptionally at scale, with a keen focus on enhancing developer experience.The ideal candidates will possess the ability to craft world-class user experiences across CLI and web interfaces while contributing to a codebase that integrates concepts from compilers, query planners, and distributed systems.What You Will DoCollaborate directly with Chalk’s co-founders to launch our first iteration.Develop using TypeScript, Python, Go, and React.Facilitate data scientists and machine learning end-users in utilizing our core platform functionalities in their preferred environments.Rapidly iterate to enhance Chalk’s platform in response to user feedback.

About ChalkChalk is at the forefront of developing a cutting-edge data platform that revolutionizes machine learning applications. We are committed to dismantling the traditional barriers of complexity, latency, and scalability that have limited ML capabilities. By merging high-performance Rust technology with user-friendly tools, we empower developers and organizations alike. Our platform is trusted by leading companies to combat fraudulent credit card transactions, validate identities, and optimize clean energy utilization. Recently, we secured a $50 million Series A funding round, spearheaded by Felicis.About the RoleWe are actively seeking passionate Full Stack Software Engineers to join our dynamic team. This is a unique opportunity to contribute significantly as an early employee within a rapidly growing startup. You will have the autonomy to tackle complex engineering challenges while taking full ownership of your work.Our ideal candidates are versatile engineers who excel at addressing business challenges across all layers of the software stack. At Chalk, we prioritize building robust data processing systems that perform efficiently at scale, all while focusing on an exceptional developer experience.We require engineers capable of crafting outstanding user experiences across both CLI and web interfaces, alongside a strong understanding of a codebase enriched with concepts from compilers, query planners, and distributed systems.Our team works in the office five days a week, with flexibility for unavoidable conflicts. Please note, this is not a hybrid position.What You Will DoCollaborate directly with Chalk’s co-founders to bring our first iteration to production.Develop applications using TypeScript, Python, Go, and React.Contribute to a codebase that incorporates advanced ideas from various fields.

About ChalkChalk is revolutionizing the data platform landscape to propel the advancements of machine learning applications. We dismantle the complexities, latencies, and scalability constraints that have historically hindered ML capabilities. Our platform melds the swift performance of Rust with intuitive tools that developers appreciate. Major companies rely on Chalk for diverse tasks, including thwarting fraudulent credit card transactions, identity verification, and optimizing clean energy utilization. Recently, we secured a $50 million Series A, spearheaded by Felicis.About the RoleWe are on the lookout for seasoned Frontend Software Engineers to join our dynamic team. In this role, you will spearhead the development of robust front-end architecture patterns, create well-abstracted reusable components, and collaborate across teams to enhance developer efficiency. Your success in this position will stem from your extensive front-end expertise and your ability to collaborate effectively across various teams and disciplines to achieve results.This position presents an exciting opportunity to join us in-person as an early employee, allowing you to make a significant impact at a rapidly growing startup. You will confront challenging engineering problems with considerable autonomy and ownership.We seek software engineers who are adept at resolving business challenges across all layers of the software stack, particularly focusing on frontend engineering. At Chalk, we construct reliable data processing systems capable of performing efficiently at scale, all while maintaining a strong emphasis on developer experience.We require engineers who can create world-class user experiences on both web and command-line interfaces, while also understanding and contributing to a codebase enriched with concepts from compilers, query planners, and distributed systems.Our team operates onsite five days a week. While we are flexible with unavoidable conflicts, this is not a hybrid role.What You Will DoCollaborate directly with Chalk’s co-founders to bring our initial iteration to productionDevelop using TypeScript (React), Python, and GoLead discussions on frontend architecture and conduct technical breakdowns.Enable data scientists and machine learning end-users to access the functionality of our core platform in their native environmentsRapidly iterate to enhance Chalk's offerings based on user feedback and needs.

About ChalkAt Chalk, we are revolutionizing the data platform that drives the future of machine learning applications. Our mission is to eliminate the complexity, latency, and scalability issues that have historically limited ML capabilities. Our platform seamlessly integrates Rust-speed performance with user-friendly tools that developers adore. Renowned companies trust Chalk to combat fraudulent credit card transactions, verify identities, and enhance clean energy utilization. Recently, we secured a $50 million Series A funding, spearheaded by Felicis.About the RoleWe are on the lookout for talented engineers to join our Infrastructure team. This is a unique opportunity to become one of our early hires and significantly impact a fast-growing startup. You will have the autonomy to solve complex engineering challenges and take ownership of your projects.We seek a platform engineer with a solid background in infrastructure engineering. At Chalk, we are tackling problems related to DBMS query planning, optimization, compilers, and distributed analytical data processing systems.Chalk employs dynamic and static analysis of Python code to optimize arbitrary user Python code, orchestrate the necessary infrastructure implied by that code, and track metadata regarding data flow through our systems.Our team works in the office five days a week. We are flexible with unavoidable conflicts, but this is not a hybrid position.What You Will DoDevelop code to automate the orchestration and provisioning of infrastructure to implement Chalk technology for our customers and prospects.Create a robust platform for managing our hosted services and deploying Chalk into customer-owned cloud environments across AWS and GCP.Collaborate closely with our Engineering and Sales teams.Contribute to interviewing and expanding the Engineering team.What We’re Looking ForMinimum of 2 years of experience in software development for automated infrastructure management.Proficiency in Python, Go, and/or Terraform.Hands-on experience with AWS and/or GCP.Strong collaborative skills in both technical and non-technical teams.

Chalk builds a platform designed to simplify and accelerate machine learning applications. The company combines the speed of Rust with approachable tools, helping developers tackle issues like complexity, latency, and scalability in ML workflows. Businesses use Chalk to support use cases such as fraud detection, identity verification, and clean energy optimization. The company recently raised $50 million in Series A funding, led by Felicis. More details can be found in this Reuters article. Role overview This Forward Deployed Engineer role is based in San Francisco and requires full-time, in-person presence (five days a week). As an early team member, you will work closely with clients and Chalk’s machine learning teams to deliver tailored technical solutions and improve the company’s infrastructure. Projects span industries like healthcare, finance, and recommendation systems, with applications including cancer detection, fraud prevention, and product recommendations. What you will do Design and implement Chalk’s technology solutions for customers, learning the platform’s infrastructure and optimizing integrations. Work closely with Engineering and Sales teams to deliver projects. Act as the main technical contact for clients during both pre-sales and post-sales, supporting onboarding and ongoing needs. Advise clients as their requirements change and new product features become available. Contribute to hiring by participating in Engineering team interviews. Requirements Technical background in software development or machine learning model development. Minimum of 2 years of experience in backend software engineering. Proficiency in Python and SQL. Strong teamwork and collaboration skills. This position is not hybrid. While Chalk offers flexibility for unavoidable conflicts, the expectation is a full-time, in-office schedule.

About ChalkChalk Inc. is at the forefront of innovation, developing a robust data platform designed to enhance the capabilities of machine learning applications. Our mission is to eliminate the complexities, latency, and scalability issues that have previously limited ML functionalities. We fuse the efficiency of Rust with intuitive developer tools, making our platform a trusted resource for leading companies tackling diverse challenges, from preventing fraudulent credit card transactions to optimizing clean energy usage. Recently, we secured a $50 million Series A funding, led by Felicis.About the RoleWe are actively seeking skilled Frontend Software Engineers to join our dynamic team. In this position, you will take charge of establishing robust frontend architecture, spearheading the development of reusable components, and collaborating across various teams to enhance developer efficiency. If you are an adept engineer with extensive frontend experience who thrives in collaborative environments, this role is designed for you.This is an exciting opportunity to join us in-person as an early team member and significantly influence our growth at this high-velocity startup. You will face challenging engineering problems with ample autonomy and ownership.Please note: We require in-office presence five days a week, with flexibility for unavoidable conflicts. This is not a hybrid position.We are looking for engineers who are adept at addressing business challenges across all software layers, with a keen focus on frontend engineering. At Chalk, we create dependable data processing systems that perform exceptionally at scale, prioritizing developer experience.We need engineers who can construct exceptional user experiences across both web and command-line interfaces while also engaging with a codebase that incorporates principles from compilers, query planners, and distributed systems.What You Will DoCollaborate directly with Chalk’s co-founders to implement our initial production iteration.Develop using TypeScript (React), Python, and Go.Lead discussions on frontend architecture and technical specifications.Facilitate the integration of our core platform's functionality for data scientists and machine learning end-users in their respective environments.Rapidly iterate to enhance Chalk’s solutions.

About Chalk Chalk is revolutionizing the data platform landscape, enabling the future of machine learning applications. Our innovative solutions eliminate the complexities, latency, and scaling limitations that have historically hindered ML capabilities. With Rust-speed performance and a suite of elegant tools, we cater to developers' needs. Our platform is trusted by leading organizations to combat fraudulent credit card transactions, verify identities, and optimize clean energy capture. Recently, we secured a $50 million Series A round led by Felicis. About the Role As a Forward Deployed Engineer, you will leverage your exceptional software engineering skills to create tailored technical solutions in collaboration with our machine learning teams. You will engage directly with Chalk's customers to construct efficient feature pipelines addressing challenges in healthcare, finance, and recommendation systems. This position offers a unique chance to work closely with clients, gathering requirements and engineering pipelines for critical use cases such as cancer detection, fraud prevention, and product recommendations. Join us in-person as an early employee and significantly impact our high-growth startup. Note: We operate in-office five days a week, with flexibility for unavoidable conflicts. This is not a hybrid role.

About ChalkAt Chalk, we are revolutionizing the data landscape to fuel the next generation of machine learning applications. Our innovative platform dismantles the complexities and delays that have historically hindered ML potential. By integrating Rust-speed performance with user-friendly tools, we empower developers to excel. Top-tier companies rely on Chalk for essential tasks such as preventing fraudulent credit card transactions, verifying identities, and optimizing clean energy usage. Recently, we secured a $50 million Series A funding round, spearheaded by Felicis.About the RoleWe are in search of a talented Product Designer to shape the interaction experience for engineers, data scientists, and ML practitioners using our web and CLI tools.As a founding designer on our team, you will work in-office, full-time, and early in our journey—playing a pivotal role in defining our product, visual identity, interaction methodologies, and design standards from the ground up.You will collaborate closely with Chalk’s founders, engineers, and customers to convert intricate data infrastructures and workflows into seamless, user-friendly interfaces. If you thrive on transforming complex backend power into intuitive frontend experiences and are motivated to deliver designs on a weekly basis, we would love to connect with you.We welcome remote and hybrid work arrangements from our San Francisco, New York City, or Los Angeles offices.Your ResponsibilitiesEngage directly with engineers and founders to explore the problem landscape, establish requirements, prototype solutions, and deliver polished experiences (note that we do not have product managers).Take complete ownership of UI/UX, from initial concept to high-fidelity mockups and implementation.Proactively collect feedback from peers and users (primarily engineers and data scientists) to validate designs and iterate swiftly.Strike a balance between speed and refinement, prioritizing practical trade-offs to deliver quickly and learn effectively.Contribute to establishing the design system: components, patterns, and principles that will evolve with the team.Deliver designs ready for implementation within your first week.Your Qualifications5+ years of professional design experience.A portfolio that highlights your successful projects.Comfortable building user-centric designs for complex systems.

About Chalk Inc. Chalk Inc. is revolutionizing the data platform landscape to empower the next generation of machine learning applications. We are dismantling traditional barriers of complexity, latency, and scalability that have historically limited ML capabilities. Our platform delivers Rust-speed performance paired with developer-friendly tools, making it the preferred choice for leading companies tackling issues such as preventing fraudulent credit card transactions, identity verification, and optimizing clean energy generation. Recently, we secured a $50 million Series A funding round, led by Felicis. About the Role We are seeking exceptional engineers to join our Infrastructure team. This is a unique opportunity to become an early employee in a high-growth startup, where you can make a significant impact. In this role, you will address complex engineering challenges with a high level of autonomy and ownership. Note: Our team works in the office five days a week. While we are flexible during unavoidable conflicts, this position is not hybrid. We are looking for a platform engineer with a solid foundation in infrastructure engineering. At Chalk, we tackle challenges from database management systems (DBMS), query planning and optimization, compilers, and distributed analytical data processing systems. Our team utilizes both dynamic and static analysis of Python programs to optimize arbitrary user Python code, orchestrate infrastructure based on the code structure, and track metadata concerning data flow through these systems. What You Will Do Develop automation code for orchestrating and provisioning infrastructure to execute Chalk technology for our customers and prospects. Create a management platform for our hosted services and oversee the deployment of Chalk in customer-owned cloud environments across AWS and GCP. Collaborate closely with our Engineering and Sales teams. Assist in interviewing and expanding the Engineering team. What We Are Looking For At least 2 years of experience in writing software for automating infrastructure management. Proficient in Python, Go, and/or Terraform. Experience with AWS and/or GCP. Strong collaboration skills.

About ChalkChalk is revolutionizing the data landscape with a cutting-edge platform that propels the future of machine learning applications. We eliminate the complexities, latency issues, and scalability constraints that have historically limited ML potential. Our platform merges the speed of Rust with intuitive tools that developers adore. Trusted by leading companies, Chalk is integral to operations that range from preventing credit card fraud to identity verification and optimizing clean energy solutions. Following our recent successful fundraising of $50 million in Series A funding, led by Felicis, we are poised for significant growth.About the RoleAs an Account Executive at Chalk, reporting directly to the VP of Sales, you will spearhead our efforts to secure new business, utilizing a technical, consultative sales approach particularly focused on high-growth, venture-backed companies. Your role will involve identifying and pursuing new business opportunities, potential customers, and vertical markets for Chalk's innovative solutions. You possess a solid understanding of technical products and services and thrive on articulating their value to clients. This is your chance to join us as an early employee and make a substantial impact in a rapidly growing start-up.We work in the office five days a week, but we are flexible when unavoidable conflicts arise. This position is not hybrid.Your ResponsibilitiesProactively identify potential customers and generate leads for new business.Develop and implement effective sales strategies to meet and exceed revenue targets.Conduct market analysis to shape Chalk’s sales strategy and playbook.Adopt a consultative sales approach by understanding customer objectives and technical hurdles.Become a knowledgeable resource on Chalk’s offerings and address client inquiries.

Join Condor Software as a Full-Stack Platform EngineerAt Condor, we are revolutionizing the financial infrastructure that supports clinical development. With billions invested annually in discovering and developing new therapies, we strive to connect clinical operations and finance into a cohesive system. By integrating real-time financial intelligence, we empower R&D and finance leaders with the tools they need to make informed, high-stakes decisions.We are an AI-driven, pharma-native infrastructure provider, scaling industry standards in collaboration with top-tier partners. Our platform facilitates prediction, control, and execution in the most complex R&D environments worldwide.The Importance of Your RoleHaving established ourselves as a trusted partner for enterprise teams, we are now focused on the challenging task of scaling our platform to meet increasing demands. As a rapidly growing company, backed by prominent investors like Felicis and 645 Ventures, this is a unique opportunity to contribute to the foundational infrastructure that will redefine how therapies reach patients.Your ResponsibilitiesAs a Full-Stack Platform Engineer, you will be pivotal in building and scaling the core platform that supports the financial intelligence infrastructure relied upon by leading biopharma companies. This role encompasses critical engineering tasks at the intersection of backend systems, cloud infrastructure, and intelligent automation, with a strong emphasis on reliability and scalability.Your primary focus will be on backend architecture, where you'll design and implement services that drive complex financial and operational workflows. You'll be instrumental in shaping data flow, workflow orchestration, and enabling emerging AI-driven capabilities. This role goes beyond simple integration; you'll be crafting robust primitives that support other teams as our product and customer base expand.Working as a core member of a cross-functional product team, you will closely collaborate with product managers, designers, quality engineers, and data specialists to transition features from concept to production. While backend expertise is crucial, you will also engage across the stack to ensure the platform's capabilities are effectively leveraged.

About Chalk Chalk builds a data platform designed to simplify machine learning at scale. The platform removes common barriers like complexity, latency, and scalability, giving developers high performance and approachable tools. Companies rely on Chalk for critical needs such as fraud prevention, identity verification, and clean energy optimization. Chalk recently raised $50 million in Series A funding led by Felicis. Role Overview: Field Marketing Manager (San Francisco) The Field Marketing Manager shapes how Chalk connects with technical audiences in person. Reporting to the VP of Marketing, this role builds Chalk’s presence at major industry conferences and creates original events that foster community around machine learning. The work goes beyond logistics and budgeting. Success comes from building genuine relationships within the developer community and turning those into real business opportunities. The ideal candidate knows what makes a technical event memorable and understands how to engage developers in meaningful ways. Key Responsibilities Design and execute an event strategy that selects the right conferences and ensures Chalk stands out. Plan and run Chalk-branded meetups, talks, and workshops to showcase the platform and strengthen community ties. Oversee the full event process: budget planning, multi-channel promotion, on-site coordination, and post-event analysis. Work closely with Developer Advocacy to align event plans with community engagement and business objectives. Partner with Sales during field activities to help close deals and generate qualified leads. Build relationships with event organizers and developer groups for strategic partnerships. Experiment with creative event formats to ensure Chalk stands out and leaves a strong impression.

About Chalk Chalk is revolutionizing the data platform that drives the future of machine learning applications. We eliminate complexity, latency, and scalability issues that have historically limited ML capabilities. Our platform marries Rust-speed performance with user-friendly tools that developers appreciate. Leading organizations rely on Chalk for various applications, including fraud prevention, identity verification, and optimizing clean energy usage. Recently, we secured a $50 million Series A funding round, led by Felicis. About the Role We are seeking talented Software Engineers to join our dynamic team. This is an exciting opportunity to become an early employee and significantly impact a rapidly growing startup. You will engage with challenging engineering problems, enjoying a high degree of autonomy and ownership. Please note: We operate in the office five days a week. While we strive for consistency, we offer flexibility for unavoidable conflicts. This position is not hybrid. We are looking for a software engineer with a robust systems engineering background. At Chalk, we address complex challenges arising from DBMS query planning and optimization, compilers, and distributed analytical data processing systems. Chalk employs both dynamic and static analysis of Python programs to optimize arbitrary user Python code, infer and manage the infrastructure implied by the structure of that code, and track metadata concerning data flow through these systems. What You Will Do Collaborate directly with Chalk’s co-founders Develop in Python and Rust Design, implement, deploy, and maintain critical components of our query planning and execution engine Quickly iterate to enhance Chalk’s platform based on customer feedback What We’re Looking For 2+ years of professional backend software engineering experience Strong understanding of computer science fundamentals. We seek individuals comfortable building and maintaining real systems rather than focusing solely on algorithmic challenges.

About HappyRobotHappyRobot is pioneering the AI-native operating system for the real economy—an innovative platform that seamlessly integrates intelligence with actionable outcomes. By harnessing real-time insights, specialized AI agents, and a coordinating intelligence, we empower enterprises to manage intricate, mission-critical operations with genuine autonomy.Our AI OS continuously accumulates knowledge, optimizes processes at every level, and adapts over time. We're initially focusing on supply chain and large-scale industrial operations, where resilience, speed, and ongoing enhancement are paramount—liberating humans to concentrate on strategic thinking, creativity, and other high-value pursuits.Discover more about our vision in our Manifesto. HappyRobot has successfully secured $62M in funding to date, including a recent $44M Series B round in September 2025. Our esteemed investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10, who share our commitment to transforming enterprise operations. We are channeling this investment into assembling a world-class team—individuals with unwavering determination, exceptional problem-solving abilities, and a passion for pushing boundaries in a dynamic, high-pressure environment. If this resonates with you, we invite you to join us at HappyRobot.About The RoleAt HappyRobot, Full Stack Engineers take charge of significant components of the product and infrastructure from start to finish.We are seeking creators who thrive in uncertain environments, have a profound appreciation for their craft, and desire authentic ownership over their creations.

About Tacit Tacit is an early-stage deep tech startup based in San Francisco, focused on hardware that changes how people interact with computers. Backed by General Catalyst, Khosla Ventures, and Greylock Partners, the team brings experience from Stanford, BrainGate, Oculus, and Tesla. The company is committed to solving complex engineering problems to deliver new products that push the boundaries of human-computer interaction. Role Overview The Full-Stack Software Engineer will help turn ambitious ideas into real products, working across Tacit's software stack. This role involves taking features from initial concept through to deployment and shaping user experiences that support the company’s mission. What You Will Do Develop the internal product stack to improve workflows and prototypes across devices and companion clients. Build and expand internal applications for demos and data collection, supporting idea testing and user experience validation. Prototype new features for human-computer interaction, iterate with test users, and refine until the experience feels seamless. Design and run product experiments, including A/B tests and feedback loops, to quickly gather insights and guide product direction. Streamline data collection and participant experiences, including setup flows, session reliability, metadata capture, monitoring, and labeling. Develop demo features that showcase real-time sensing and inference in engaging, reliable ways. Find and implement integrations that improve team workflows and efficiency. Create and improve automated testing and release systems, such as CI/CD pipelines, smoke tests, and regression checks, to support frequent updates. Work closely with machine learning, hardware, and industrial design teams to define requirements, deliver results, troubleshoot, optimize, and ensure reliability. Qualifications Strong skills in Python (FastAPI, Pydantic; experience with pandas or numpy) and modern TypeScript/React. Experience building production backends (APIs, data models, reliability, observability) and delivering features for end users. History of shipping multiple products from start to finish.

At Siftstack, we are revolutionizing the development, testing, and operation of modern machines. Our innovative platform empowers engineers with real-time observability over high-frequency telemetry, effectively eliminating bottlenecks and facilitating faster, more dependable development.Founded by a team of experts from SpaceX, Google, and Palantir, Siftstack was inspired by our experience with pioneering projects like Dragon, Falcon, Starlink, and Starship. Our mission-critical infrastructure is designed for precision and scalability, meeting the highest demands of reliability in engineering.As an early-stage engineer at Siftstack, you will not only write code, but you will also play a pivotal role in defining our architecture, shaping our product, and cultivating a culture focused on addressing real engineering challenges. If you thrive on tackling complex technical problems and want to build foundational systems that support intricate machines, we'd love to hear from you.

About Chalk Chalk is revolutionizing the data platform landscape, empowering the next generation of machine learning applications. By dismantling traditional barriers of complexity, latency, and scalability, we enhance the capabilities of ML. Our platform boasts Rust-speed performance combined with user-friendly tools that developers adore. Major corporations rely on Chalk for vital functions such as preventing fraudulent credit card transactions, identity verification, and optimizing clean energy utilization. Recently, we've raised a $50 million Series A round led by Felicis. About the Role In collaboration with our founders, you will spearhead a team of talented engineers dedicated to building our platform for real-time inference at scale. This position offers a unique chance to influence technical architecture and cultivate engineering culture in a rapidly-growing, early-stage company. You will work alongside exceptional individuals, including winners from Putnam and Advent of Code, former quants from Jane Street, and contributors to the Rust compiler—everyone committed to pushing the boundaries of what's achievable in ML inference. We maintain a fully in-office work environment, five days a week. While we embrace flexibility for unavoidable conflicts, this role does not support hybrid work arrangements. Your Responsibilities Lead a team of engineers focused on developing Chalk's data platform Collaborate with the founding team to define and implement our technical roadmap Establish engineering processes that promote high velocity while ensuring quality Engage directly with clients to understand their requirements and ensure that Chalk's platform effectively addresses real-world ML challenges Help shape Chalk's engineering culture as we expand—fostering top talent along the way Qualifications A minimum of 5 years of engineering experience, including at least 2 years in a leadership role Prior experience in an early-stage startup environment Proven track record in building production-level ML systems or data infrastructure Exceptional programming skills and a strong understanding of systems architecture Proven ability to lead technical teams Excellent communication skills capable of bridging technical and business contexts

About StackAIStackAI is a revolutionary no-code AI workflow platform that enables businesses to construct, implement, and expand AI-driven workflows without requiring extensive machine learning expertise. With a growing user base and increasing enterprise adoption, our goal is to democratize access to large language models (LLMs), empowering every business operator—beyond just developers. Supported by Y Combinator and top-tier investors, we are laying the groundwork for the AI-driven future of work.The RoleAs a Senior Full Stack Engineer, you will be instrumental in defining the product and technical architecture at StackAI. Your responsibilities will span the entire technology stack, from crafting scalable backend systems to creating stunning and user-friendly frontend interfaces, and incorporating advanced AI models into our platform. This role offers significant impact, as you will work closely with the founding team, take charge of essential product features, and shape the engineering culture of a rapidly evolving startup.We seek exceptional 10X engineers—innovative builders who can consistently deliver results in a dynamic environment, remain inquisitive, and excel in diverse roles.ResponsibilitiesIn this role, you will:Build and own the entire platform, from backend services and APIs to frontend interfaces.Create robust, scalable backend systems utilizing Python and FastAPI (or similar), with optimized databases (SQL/NoSQL).Design and maintain high-quality user interfaces using React, Next.js, TypeScript, and Tailwind CSS, ensuring polished, intuitive, and responsive user experiences.Integrate new AI models and features into our products for seamless performance and enhanced value.Manage StackAI’s landing and product pages to establish benchmarks for clarity, design, and quality.Collaborate across the stack to connect backend services with frontend applications seamlessly.Engage with design, product, and customers to refine product direction and prioritize user needs.Stay at the forefront of full-stack technologies, promoting best practices and innovative solutions.Assist with customer support as needed; every team member contributes to user satisfaction.

Why Choose Alex?At Alex, one of the most promising startups emerging from our Y Combinator batch, we are making significant strides in the hiring landscape. We have secured strong funding, are generating revenue, and have ample runway to fuel our growth.Our innovative AI-driven recruitment tool revolutionizes the job interview process, enabling companies to obtain critical hiring insights more swiftly and effectively than ever. Our clients are enthusiastic about our product, and we are just beginning our journey.Who We Are?We are a team of individuals who:Thrive on tackling complex engineering challengesAdapt quickly and are committed to achieving resultsDedicate ourselves to hard workAct with urgencyValue in-person collaboration in our San Francisco office, five days a weekTechnologies We UtilizeWe prefer candidates with experience in:JavaScript (Typescript, React, Node, Next)PythonCloud and DevOps tools (Azure, Kubernetes, Docker)System ArchitectureYour ResponsibilitiesAt Alex, we operate similarly to a marketplace, providing unique interview experiences for candidates and a robust data analysis platform for employers. As a hands-on engineer, you will develop both consumer-facing applications and enterprise-grade software, with ample opportunities for professional growth. Potential consumer software challenges include:How can we reduce average interviewer response latency to 200ms?How can we refine our models to minimize hallucinations and help Alex pass the Turing test?How will our system architecture evolve as we scale to accommodate thousands of users concurrently?You will also address enterprise-related software challenges such as:How do we integrate with our clients' internal hiring systems?What is the optimal way to visually present interview results swiftly?How can Alex facilitate end-to-end coordination of the hiring process?And a myriad of feature requests awaiting your expertise!

About Numeral:Numeral is revolutionizing the tax landscape for digital businesses, helping them navigate the complexities of regulations across 47 states and over 50 countries. Our mission is to lift this burden so that teams can concentrate on their primary objectives.As the largest and fastest-growing AI-driven tax solution, Numeral was established in 2023 and has successfully raised over $57 million from notable investors such as Benchmark, Mayfield, and Y-Combinator. We proudly serve more than 2,500 paying customers and have consistently tripled our revenue year over year since our inception.While our main hiring hubs are in San Francisco and New York, we do offer remote opportunities based on specific circumstances.About the Role:We are in search of a foundational Full-Stack Engineer who thrives in dynamic environments, enjoys constructing intricate distributed systems, and is eager to establish core architecture within a rapidly expanding early-stage startup. You will spearhead the design and implementation of APIs, services, and infrastructure that form the backbone of our platform. Additionally, you will collaborate with leadership to drive engineering strategy, product execution, and cultural development.Your Responsibilities:Design and develop scalable and secure backend services and APIs from the ground up.Make architectural choices that prioritize speed, data integrity, and long-term sustainability.Work closely with product, design, and data teams to create efficient systems that enhance crucial customer workflows.Take ownership of infrastructure, observability, and performance for the services you create.Contribute to the establishment of engineering best practices, code quality, and a robust backend culture.What You Bring:Over 7 years of experience in developing backend systems in high-growth settings.Proficiency in backend technologies such as Node.js, PostgreSQL, Redis, and cloud services (AWS preferred).Experience in designing resilient APIs and distributed systems at scale.A strong product sensibility with the ability to balance performance, flexibility, and speed.A startup mindset: comfortable with ambiguity and eager for swift growth.Intensity & Ownership: This role goes beyond a standard 9-5 — we are rapidly scaling and face exciting opportunities ahead.Customer Obsession: A genuine commitment to enhancing user experience and resolving their challenges.