Role OverviewLocation: San Francisco, CA or Remote (US) Work Model: In-office/RemoteAbout Effective AIAt Effective AI, we are pioneering the future of work by pushing the boundaries of artificial intelligence. We believe that the true potential of AI lies not in automating simple tasks, but in enhancing complex knowledge work that requires critical thinking and expertise. Our mission is to create advanced AI Teammates that excel in navigating intricate workflows and collaborating seamlessly with human professionals. We are initially focusing on the trillion-dollar U.S. Property & Casualty insurance sector, an area rich in data and complex processes, presenting an exciting challenge.Having secured $10 million in seed funding from esteemed investors such as Lightspeed Ventures and Valor Equity Partners, our team is based in San Francisco and thrives on close collaboration to tackle these daunting challenges.Your Role and ResponsibilitiesAs a Founding Frontend Engineer, you will be an integral member of our pioneering team, instrumental in crafting and developing our core product from its inception. You will explore the intersection of AI and human collaboration through data-intensive analytical projects tailored for insurance professionals.Key responsibilities include:Facilitating long-term task execution by establishing essential UX patterns for engaging with multi-turn, multi-tool AI systems.Empowering actuaries and underwriters to process thousands of documents simultaneously by providing them with coding tools and coding agents.Designing and implementing our frontend architecture using contemporary frameworks (React, TypeScript, Tailwind), with a strong emphasis on performance and maintainability.Hands-on involvement with our backend and core agentic platform, all developed in TypeScript.Collaborating closely with design, backend, and machine learning engineers to craft comprehensive user experiences.Rapidly prototyping and iterating on features while balancing speed and quality in a dynamic startup environment.Who You AreWe are in search of an innovative and driven creator eager to take on challenging problems.You possess a genuine passion for AI and thrive on solving ambiguous challenges through first principles thinking.You have extensive experience in developing production-ready web applications.

Role OverviewLocation: San Francisco, CA Work Model: In-officeAbout Effective AIAt Effective AI, we are pioneering the future of work, focusing on sophisticated AI solutions for complex knowledge tasks rather than simple, repetitive functions. Our goal is to develop advanced AI Teammates that excel in intricate workflows and collaborate seamlessly with human professionals. Our initial challenge is to revolutionize the trillion-dollar U.S. Property & Casualty insurance sector, an area rich in data and complexity, ideal for our innovative approach.We have successfully secured $10 million in seed funding from prominent investors including Lightspeed Ventures and Valor Equity Partners.Our passionate team operates out of San Francisco, where we value in-person collaboration to address these pressing challenges.Your ResponsibilitiesAs a Founding Software Engineer, you will be an integral member of our founding team, significantly influencing the design and development of our core product from inception. You will confront critical challenges in agentic AI, crafting Teammates capable of managing essential insurance functions such as underwriting and claims processing.Specifically, you will:Facilitate long-term task completion by creating the foundational architecture for AI agents to plan and execute multi-step processes reliably over prolonged interactions.Develop advanced reasoning functionalities, enabling agents to make informed decisions based on ambiguous or incomplete information, akin to human experts.Create intelligent, tool-utilizing agents capable of selecting and employing a variety of external tools—APIs, databases, web searches, and Excel-based pricing algorithms—to gather information and take decisive actions.Design adaptive and learning systems, equipping our AI Teammates to learn from feedback and adjust to evolving conditions such as regulatory changes or market dynamics.Your ProfileWe seek an innovative and driven builder excited to tackle substantial challenges.You possess a solid foundation in computer science and remarkable problem-solving capabilities, evidenced by impactful projects or previous experience.Your genuine enthusiasm for AI fuels your passion for tackling complex issues.

About Simple AIAt Simple AI, we are pioneering cutting-edge voice AI solutions tailored for enterprises. Our lifelike voice agents empower renowned companies such as DoorDash, xAI, and Omaha Steaks in managing diverse phone operations ranging from customer support to order intake and lead qualification. As we experience rapid revenue growth, we seek a couple of founding software engineers to help us meet current customer demands while developing innovative systems for the future. Our team is passionate about harnessing AI to transform the world, and we operate from our San Francisco office five days a week.Simple AI is proudly supported by top-tier investors and industry leaders, including Y Combinator, Massive Tech Ventures, and prominent figures like Michael Seibel (co-founder of Twitch), Jared Friedman (Scribd), Alexandr Wang (Scale AI), Matt Van Horn (June Oven and Lyft), Suhail Doshi (Mixpanel), JJ Fliegelman (WayUp), and Scott Wu (Cognition).Meet the FoundersThe founders, Catheryn Li and Zach Kamran, previously led software teams at Y Combinator, where they launched numerous products for YC founders, including the co-founder matching site. Cat brings experience from Instagram and Facebook and holds degrees in mathematics and computer science from MIT. Zach studied computer science and statistics at the University of Chicago and led software initiatives at PEAK6.What We ProvideCompetitive salary with significant equity opportunitiesEmployee-friendly equity termsOffice located in San FranciscoComprehensive health, dental, and vision insuranceComplimentary lunch and dinner at the officeFree Uber rides home after 8:30 PMRegular team events and offsite activitiesYour Qualifications4+ years of relevant software engineering experience.Exceptional problem-solving skills and a passion for tackling technical challenges.A customer-centric mindset coupled with strong communication skills and a keen interest in product design and prioritization.Self-motivated with the ability to work independently.A genuine enthusiasm for continual learning and keeping abreast of the latest advancements in AI.

Founding Engineer – Baton AILocation: San Francisco, CA (In-Person)Experience Level: 3+ years (Full-Stack Engineering)About Baton AIBaton AI (getbaton.ai) is revolutionizing enterprise automation with a cutting-edge platform designed for seamless cross-application workflows. Our mission is to empower solutions engineering and implementation teams by automating customer onboarding and product setup, allowing them to deliver value at a faster pace and scale. This is just the beginning of our expansive vision for enterprise-wide, AI-driven automation.As a rapidly growing, VC-backed startup, we are seeking visionary builders who are eager to innovate, take initiative, and play a key role in shaping the future of AI automation.Your ResponsibilitiesLead Development of Core Systems – Architect and develop essential components of our full-stack web application, API infrastructure, and AI-enabled automation platform.Tackle Advanced Technical Challenges – Engage in complex tasks involving AI agents, prompt engineering, evaluation, monitoring, API integration, and browser automation.Influence Product Direction – Work closely with early adopters and the founding team to shape our technical roadmap and implement impactful features.Embrace Rapid Learning and Prototyping – Innovate, experiment, and deliver solutions swiftly in a high-trust, streamlined environment.Our Ideal Candidate3+ Years in Full-Stack Engineering – Strong proficiency in React and Typescript.Expertise in Modern Web Development – Familiarity with React/NextJS and Node.js. Knowledge of Python and Elixir/functional programming is advantageous.Experience with Rich-Text Editors – Previous work on features similar to those found in Notion or be eager to tackle this challenge.Interest in AI and Workflow Automation – A passion for developing AI/LLM-driven applications and automation tools.Product-Oriented Mindset – A commitment to clean code and exceptional user experience.Strong Problem-Solving Skills – Ability to navigate ambiguity and deliver results efficiently.Willingness to Work On-Site – Enthusiastic about collaborating in person in San Francisco.

Join Shiplight AI as a Founding Engineer, AIAre you ready to be at the forefront of the AI revolution and make a significant impact?Do you believe in enhancing productivity exponentially through innovative solutions?At Shiplight AI, we are on a mission to redefine enterprise-scale automation through intelligent agents. We envision a future where organizations leverage AI systems capable of understanding context, taking meaningful actions, and seamlessly collaborating with humans — transforming workplace dynamics.Our initial goal is to revolutionize software quality assurance. We are developing cutting-edge agentic QA systems that integrate deeply within the software development lifecycle, empowering every product manager, developer, and tester with their own AI QA engineer for real-time validation of their work.You will be part of a small, dedicated founding team led by industry experts, focusing on the intersection of AI agents, systems engineering, and enhancing real-world developer productivity.

Kiloforge operates as a company factory in San Francisco, using AI to generate, validate, build, and distribute software products for niche communities. The team’s goal is to address overlooked challenges with tailored applications and eventually manage thousands of products, each designed for specific needs. Role overview This founding engineer position centers on building and shipping micro applications at a rapid pace. The work involves developing software for real users, automating processes, and adapting quickly as priorities shift. The environment values experimentation and learning across disciplines. What you will do Develop and release micro applications each week for actual users Continuously improve and automate development workflows Who we're looking for Generalists with broad skills, ideally extending beyond engineering Experience building products that have reached real customers Resourceful and adaptable, able to respond to new challenges Strong instincts for product and design Comfortable with shifting priorities and ambiguity Curious and motivated to learn across different fields Background in founding a company or strong interest in entrepreneurship The team Founders with experience building companies, including one that reached $20M ARR Track record of launching products with thousands of active users Driven to make a meaningful impact Small, agile group of founders and builders Supported by investors such as a16z, Uncork Capital, Y Combinator partners, and Rahul Vohra Why join Kiloforge Collaborate with designers, creatives, and marketers to integrate their expertise into AI-driven workflows Ideal for those ready to take risks and help reshape how software is built and shipped Hands-on experience building and distributing products in an AI-first setting

Summary: Join Interface as a Founding Engineer! We seek versatile engineers (ML, data, full-stack) who are driven, innovative, and eager to make a difference. If you're ready to challenge the status quo and build impactful solutions, we want you on our team! Your Profile:Make swift, informed decisions with a focus on outcomesProactively address issues before they escalateFluent in our technology stack (TypeScript, Python, Docker, LLMs, YOLO, Tesseract, PostgreSQL, AWS, React Native, etc.)Have a proven track record of building functional productsThrive in fast-paced environmentsYour Responsibilities:Engage with users/customers to understand their experiences, challenges, and requirementsDesign robust systems utilized by thousands at billion-dollar enterprisesDevelop autonomous data pipelines for auditing large volumes of documentsEnsure scalable infrastructure managementDeliver quickly – our mantra is progress over perfection.Important Insights:Collaborate directly with the founding team and customersUser needs take precedence over flashy featuresThe team works six days a week in our San Francisco officeEnjoy working in SF: vibrant atmosphere, pleasant weather, and access to the best tech ecosystem in the world Additional Information:We welcome applications from around the globe.We offer competitive compensation, substantial equity, and the chance to influence our early team dynamics.$3,000 referral bonus for successful hires.About Interface: We are pioneers in autonomous safety solutions for the industrial sector, focusing on error detection and correction in industrial documentation. Our AI-powered platform aims to automate compliance tasks across various domains. You will leverage cutting-edge technologies at the crossroads of LLMs, computer vision, and data frameworks to redefine industry standards.

Who We AreAt Lightning AI, we are the pioneers behind PyTorch Lightning, established in 2019. We create a comprehensive platform that facilitates the development, training, and deployment of AI systems, streamlining the journey from research to production.Following our merger with Voltage Park, an innovative neocloud and AI Factory, we combine cutting-edge software with scalable and cost-efficient computing resources. Our platform equips teams with the essential tools for experimentation, training, and production inference, all while prioritizing security, observability, and control.We cater to a diverse clientele that includes individual researchers, startups, and sizable enterprises. With a global presence, our offices are located in New York City, San Francisco, Seattle, and London, supported by renowned investors including Coatue, Index Ventures, Bain Capital Ventures, and Firstminute.Our ValuesMove Fast: We embrace speed and precision, breaking down complex challenges into manageable steps.Focus: We achieve our goals one at a time, collaborating effectively to deliver high-quality features.Balance: We believe sustained performance comes from proper rest and recovery, promoting a healthy work-life balance.Craftsmanship: We take pride in our work and strive for excellence in every detail.Minimal: We prioritize simplicity in our innovations, focusing on what truly matters.What We’re Looking ForWe are seeking a talented Frontend Engineer to enhance and scale the user interface and frontend infrastructure of the Lightning AI platform. This individual will take ownership of key features, driving development from inception to deployment while collaborating with a highly skilled team of engineers, product managers, and designers. You will have the opportunity to build from proof of concept to release, with an emphasis on speed, quality, and iterative improvements.With over 10,000 organizations leveraging Lightning, you will play a vital role in shaping how AI is built and deployed globally.This is a hybrid role based in our San Francisco office, requiring in-office attendance for 2 days a week. The salary range for this position is $120,000 to $250,000.

Join Our Innovative Team at Retell AIRetell AI is at the forefront of revolutionizing the call center industry through advanced voice AI technology. In just 18 months since our inception, we have empowered thousands of businesses to optimize their sales, support, and logistics calls, which previously relied on large teams of human agents. Supported by prominent investors including Y Combinator and Alt Capital, we've achieved remarkable growth, scaling from $5 million to $36 million in annual recurring revenue (ARR) while expanding our talented team to 20 members.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. Unlike traditional automation that requires ongoing human oversight, we are building intelligent AI "workers" capable of functioning as frontline agents, quality assurance analysts, and managers, constantly enhancing customer interactions.If you are a passionate innovator eager to solve complex technical challenges and make a tangible impact at one of the fastest-growing voice AI startups, we invite you to join us in shaping the future.Ranked among the top 50 AI applications by a16z: a16z List4th on Brex's Fast-Growing Software Vendors of 2025: Brex BenchmarkFeatured as a leading startup on: Leanaileaderboard

About Pax HistoriaPax Historia is pioneering a new genre of gameplay by leveraging cutting-edge generative AI technologies. Our innovative platform combines the strategic depth of grand strategy games with the limitless creativity of a sandbox environment, driven by a vibrant community that actively creates and modifies scenarios.Our user base generates hundreds of scenarios daily and engages in millions of game rounds each week, exhibiting rapid growth. We are proud to be supported by esteemed investors such as Y Combinator, Pace Capital, and Z Fellows. Your contributions will have an immediate impact on a product enjoyed by hundreds of thousands of players.Position OverviewWe are seeking a founding-level ML Systems Engineer to join our team in-person full-time in San Francisco (Dogpatch). You will have the opportunity to work closely with our cofounders to shape the future of our technology.Current Challenges:Closed-source models yield satisfactory game performance but come with high costs.Open-source models are more budget-friendly yet often underperform in our environment.Prompts and harnesses exhibit minimal variance across models.We have a functional internal evaluation system with significant opportunities for enhancement.Your Responsibilities:Establish and manage the necessary infrastructure for customizing harnesses and prompts tailored to individual AI models to optimize their performance.Develop domain-specific models aimed at narrowing or completely bridging the gap in performance between open and closed models.Optimize caching strategies to decrease expenses associated with closed-source models.Enhance the performance of closed-source models by training specialized endpoints.Assess and advance the effectiveness of embedding and reranking mechanisms in our applications.Facilitate the creation of new user experiences based on emerging world models.In Summary: Your work will directly enhance the affordability and enjoyment of the game.

About HyperspellHyperspell is revolutionizing the Memory & Context Layer for AI Agents.AI agents are brilliant yet lack context.While AI agents excel in standardized testing, they struggle with real-world applications. Today's cutting-edge agents lack the contextual understanding that humans naturally acquire through diverse interactions. This context evolves with their tasks.Hyperspell empowers AI agents with contextual awareness by integrating with users' workspace data, creating a tailored memory and context layer.Our ValuesWe are committed to shaping the future through bold innovations. Our goal is to establish ourselves as the indispensable context layer for organizations, enabling all their AI agents to connect seamlessly. We embark on this journey not because it is easy, but because it is significant.We prioritize care — for our customers, their success, the future of AI, and most importantly, for one another. As we build the frontier of AI, we strive to be one of the most technologically advanced yet profoundly human companies in history — a place where we can enjoy shaping the future together.Our InvestorsOur vision is supported by esteemed investors such as Y Combinator, Afore Capital, Scribble Ventures, and Pioneer Fund. Our angel investors include leading figures from OpenAI, Anthropic, xAI, and DeepMind, alongside respected founders from Silicon Valley like Siqi Chen (Runway) and Julian Weisser (On Deck).Our FoundersFounded in 2024 by Conor Brennan-Burke and Manu Ebert, Hyperspell is driven by experienced leaders. Conor previously spearheaded growth at Checkr, overseeing a $30 million API product portfolio and earning the title of 'the most helpful founder in YC'.Manu brings over 15 years of expertise in machine learning and AI, having successfully sold two companies and led high-growth engineering teams at Airbnb. Interestingly, he acquired his first .ai domain in 2014, needing to send a fax to the domain authority in Anguilla to do so.About the RoleAs our founding platform engineer, your mission will be to construct the infrastructure that makes Hyperspell feel magical — swift, dependable, and effortlessly scalable. You will be responsible for the foundation upon which our entire product is built, ensuring that when customers entrust us with their data, we uphold their trust.

Join Our TeamFinal Round AI, located in the vibrant heart of San Francisco, California, is at the forefront of transforming the job interview landscape through innovative technology. Our platform delivers real-time interview coaching, realistic mock interview simulations based on leading company standards, and essential tools designed to craft an impressive, hireable resume. We strive to empower candidates to distinguish themselves, cultivate confidence, and achieve their career aspirations.Supported by some of the most prestigious venture capital firms in Silicon Valley, Final Round AI is experiencing rapid growth. Our dynamic team is expanding, and we’re in search of dedicated, visionary individuals who thrive in fast-paced environments. Having already assisted over one million candidates from more than 100 countries in landing their dream jobs, Final Round AI is truly redefining career paths.

Founding EngineerJoin Terac: The Premier Expert Network Driving Frontier ResearchLocation: San Francisco (in-person required) | Stage: Seed ($9M raised)At Terac, we are captivated by the vision of a future where agent-driven companies operate without traditional employees, yet still rely on human intelligence. As we stand on the brink of a new era where AI will handle most tasks with human oversight, Terac is poised to be the labor marketplace that fuels this post-AGI landscape.We are currently an expert network that supports cutting-edge research by constructing the foundational layer that facilitates on-demand human labor. Our partners integrate with us through API access to a diverse pool of research-grade experts. We manage sourcing, verification, screening, and payments, allowing our partners to concentrate on product development.Historically, jobs have transitioned from lifelong commitments to short-term engagements. From the stone age to the industrial era, and now platforms like Uber, the trend toward AI-driven labor marketplaces is undeniable and will only escalate in demand.Having successfully secured $9M in funding from notable investors including Emergence, SignalFire, Audacious, and Z Fellows, we are seeking innovative engineers with a founder's mindset to take ownership of critical components of our platform as we expand from research tools into the larger human data economy.Your Responsibilities:Lead and enhance the recruitment engine, utilizing targeted advertisements, referrals, automated outreach, and creative solutions to identify niche audiences.Develop and refine the Terac API for integration by research tooling and AI data companies.Implement the AI moderator, our voice agent designed to screen candidates, assess long-term tasks, detect fraudulent behavior, and facilitate multilingual conversations.Create marketplace systems that encompass opportunity routing, pricing optimization, expert lifetime value modeling, and feasibility analysis.Design the expert network experience, focusing on onboarding processes, opportunity matching, payout systems, and trust frameworks to retain experts.Collaborate closely with the CTO to influence technical strategies utilizing technologies such as Next.js, TypeScript, tRPC, Drizzle, Neon Postgres, LiveKit, and the Vercel AI SDK.Your Profile:A proactive builder with 3+ years of experience in software engineering, preferably in startup environments.

Location: San Francisco, CAType: Full-time, on-siteOverview: As the digital landscape evolves, we at AgentMail are at the forefront of a revolution that empowers AI agents with their own identities and communication tools. Our mission is to create solutions in an uncharted territory, where the challenge is to build something that truly resonates with agents as the new citizens of the internet. If you thrive in innovative environments and enjoy taking projects from inception to execution, we want to hear from you.About AgentMail: We are pioneering an API that transforms traditional email into a robust communication platform for AI agents. This is not merely AI applied to email; it's a groundbreaking approach to integrate email functionality directly into AI.We are seeking a founding engineer with a strong foundation in backend systems and infrastructure to develop the fundamental tools that agents will rely on for communication, authentication, and real-world operation. This position is ideal for someone passionate about systems engineering: from APIs and distributed infrastructure to reliability and developer tools.Why Join Us?Exceptional Team: Our founding team consists of industry experts with backgrounds in quantitative analysis, software engineering, and private equity, featuring talent from renowned organizations like Optiver, NVIDIA, Amazon, Modern Treasury, and KKR.Explosive Growth: Since January, we have doubled our user base every two weeks and anticipate continued rapid expansion as the demand for AI agents skyrockets.Unique Market Position: We are the only provider of identity solutions for AI agents, akin to how Gmail serves human users.Your Role:Design APIs and abstractions that are user-friendly for both humans and AI agents.Develop high-performance, low-latency systems with a focus on agent user experience.Engage directly with our core infrastructure, which processes hundreds of thousands of emails daily.Innovate by merging cutting-edge AI capabilities with traditional email solutions.Take ownership of projects from design through to production deployment.Produce clear, maintainable code accompanied by thorough technical documentation.Act as a liaison for customer feedback, representing their needs within our team.Qualifications:We are looking for candidates with a strong backend development background, ideally with experience in API design, distributed systems, and software reliability.

Join Us as a Founding Engineer!At Brainbase, we're redefining the workforce landscape with AI Employees, akin to how Retool transformed internal tools.Imagine a world where AI collaborates seamlessly with human teams. Brainbase empowers businesses to develop their own AI workforce.In just one year, we've achieved $XM+ ARR and are on course to surpass $XXM+ soon. Our clientele spans from small and medium businesses to Fortune 50 corporations. We're proudly supported by Y Combinator, 500 Global, and other prestigious investors, including founders from YouTube and HubSpot, as well as notable YC alumni.About the RoleAs a pivotal member of our founding team, you'll play a crucial role in integrating AI into the enterprise landscape: launching innovative features, engaging with users, and fostering a vibrant company culture for future team members.You will collaborate closely with our CEO and founding team, focusing on enhancing our infrastructure (both cloud and on-premise) and refining our proprietary agent system based on user feedback.Who Should Apply?This position may be a perfect fit for you if:Resourceful: You excel in maximizing outcomes with limited resources, whether that be time, finances, or computing power.Resilient: You persist through challenges and only step back when you discover a more effective approach.Decisive: You make sound decisions under pressure, even with incomplete information, and swiftly move on to new challenges.Passionate about Problem-Solving: You thrive on tackling complex puzzles, games, or challenges, regardless of initial proficiency.Fun-Loving: You maintain positivity and uplift those around you, even during tough times.Key RequirementsAlongside the qualities outlined above, we seek candidates with the following qualifications: Essential SkillsLocation: Based in San Francisco or open to relocation.Work Authorization: Must have a valid US work permit (we do not sponsor H1-Bs; OPTs are acceptable).Minimum of 2 years of software engineering experience (recent graduates are encouraged to apply; personal projects are valued).Proficiency in Typescript and Python.Familiarity with Large Language Models (LLMs) such as OpenAI API, Langchain, or HuggingFace.

Overview:At Alleviate Health, we are pioneering the development of AI agents designed to significantly streamline clinical trials by autonomously engaging with patients for recruitment and ongoing support. Our mission is to resolve a critical issue that haunts executives at the world’s largest pharmaceutical companies, valued at over $100 billion.Having successfully bootstrapped our operations, we've secured major enterprise accounts and are experiencing substantial market demand. Following a successful $4.3 million seed funding round led by a16z, we are assembling a top-tier team to tackle one of the most pressing challenges in drug development while drastically reducing the timeline for delivering life-saving medications to those in need.Context:The process of conducting clinical trials is complex, fraught with challenges, and carries significant financial stakes. Pharmaceutical companies allocate tens of billions annually to ensure they can qualify and screen vast numbers of patients while maintaining contact over extended periods. Remarkably, around 80% of clinical trials are delayed due to recruitment issues, costing between $600,000 and $8 million for each day a trial is postponed.This labor-intensive challenge of patient screening, recruitment, and retention across numerous research sites is a fundamental bottleneck in clinical trials.About Alleviate:At Alleviate, we have developed state-of-the-art AI agents that autonomously manage patient recruitment and retention for clinical trials. Our agents conduct over 100,000 conversations monthly by:Intelligently screening and routing patients to appropriate trials.Collecting essential trial data from patients multiple times a week.Providing accurate answers to patient inquiries.

Join Airwallex as a Senior Frontend Engineer, AIAt Airwallex, we redefine the landscape of global financial services. As the premier unified payments and financial platform for businesses around the globe, we harness our proprietary technology to empower over 200,000 organizations, including notable names like Brex, Rippling, Navan, Qantas, and SHEIN. Our fully integrated solutions support everything from business accounts and payments to spend management and embedded finance on a worldwide scale.Originating from Melbourne, our diverse team of over 2,000 talented professionals across 26 global offices is dedicated to innovating within the tech landscape. With a valuation of US$8 billion and investment backing from industry leaders such as T. Rowe Price, Visa, Mastercard, and Sequoia, we are at the forefront of establishing the future of global finance. If you are eager to tackle ambitious challenges and make a real impact, we invite you to join our team.What We Look ForWe seek builders with an entrepreneurial spirit who thrive on impactful work, rapid learning, and true ownership. You bring deep expertise and critical thinking skills, driven by our mission and operating principles. You are agile yet judicious, curious yet focused, and you approach decisions with analytical rigor while maintaining pace.You embody humility and collaboration, transforming innovative ideas into tangible products, and you’re committed to executing projects efficiently. Leveraging AI, you will enhance productivity and expedite solutions to complex problems. Here, you will confront significant, high-visibility challenges alongside exceptional colleagues, advancing your career as we revolutionize global banking.About Our TeamOur team is dedicated to developing AI solutions that alleviate financial burdens for startups worldwide. We are pioneering intelligent automation across payments, payroll, bookkeeping, and tax, allowing founders to concentrate on growth rather than finance management.Utilizing state-of-the-art AI tools, from prompt engineering to fine-tuned models, we adopt the best strategies for each challenge by prioritizing genuine founder pain points, ensuring accountability for customer outcomes, and delivering swiftly.Our compact, elite team is focused on building, led by experienced operators with a proven track record of deploying AI products at scale. In this role, you will tackle challenging technical issues with significant autonomy and a direct impact on customer experience.

About AbacusAt Abacus, we are revolutionizing the operations of accounting firms through innovative AI agents that automate the monotonous and repetitive tasks currently faced by teams. Our cutting-edge core engine integrates advanced Optical Character Recognition (OCR) and Large Language Models (LLMs) to provide genuinely intelligent back-office automation solutions. We have already established partnerships with significant enterprise clients, generating substantial revenue, and are proudly supported by leading investors. Having achieved this milestone as a compact team of two, we are eager to expand our workforce. If you are passionate about shaping the future of AI-driven operations and are ready to take on impactful technical challenges from the outset, this is your opportunity.The RoleWe are seeking our inaugural Founding Engineer to take charge of and enhance the core machine learning engine that powers Abacus. Reporting directly to the co-founders, you will work on-site from our San Francisco office. This is a unique chance to join a rapidly growing company as an early engineer, endowed with significant autonomy and influence over both product and technical direction.In your first 3–6 months, you will:Enhance and scale our ML extraction engine utilizing LLMs and OCR technologies.Take ownership of backend architecture and infrastructure decisions.Develop and launch innovative features that broaden the scope of automated workflows.In the following year, you will play a pivotal role in establishing the foundation of our engineering organization as we scale, while remaining hands-on and focused on delivering impactful results.What You’ll DoLead the development of our machine learning-driven document extraction engine.Architect backend systems with an emphasis on performance and scalability.Create and deploy new automation features tailored for tax firms.Work closely with the founders to align on product and user requirements.Contribute to defining our engineering culture and establishing the technical roadmap.What We're Looking ForEssential Qualifications:1–5 years of experience, preferably in environments with high ownership or early-stage ventures.Proficient backend development skills, especially in Python.Demonstrated ability as a 0→1 builder, whether through side projects, startup experience, or both.Commitment to work from our SF office, five days a week.Willingness to complete a technical assessment as part of the application process.

Join us at Growl, the pioneering ad network tailored for consumer AI applications. In just 45 days since our inception, we've successfully expanded our publisher network to millions of users.About UsAs AI emerges as the predominant interface for internet users, integrating digital advertising into AI-driven experiences is becoming essential. Growl is at the forefront, aggregating resources across consumer AI applications to facilitate monetization through advertisements while enabling advertisers to connect with their target audiences more effectively.Supported by leading investment firms such as PearVC and Audacious Ventures, who have a track record of backing billion-dollar enterprises including DoorDash and WorkOS, we are also guided by advisors with extensive experience in mobile ad technology and consumer AI sectors. Our founder, Sahil Manocha, is a published researcher and has previously developed advertising infrastructure at Google.Our Progress We have already tackled the challenging cold start issue that ad networks face by successfully onboarding both advertisers and publishers. Our next steps involve enhancing our core infrastructure to deliver the most contextually relevant advertisements at optimal times.Your RoleAs a founding engineer, you will be instrumental in designing the ad delivery engine within AI applications and developing the supporting infrastructure. This position offers significant equity and a competitive salary ranging from $170K to $220K.What You Will BuildWe already handle millions of requests per minute, with expectations for dramatic growth in the coming months.Your projects will include:An ad decisioning pipeline that encompasses candidate retrieval, scoring, filtering, and final ranking, all under stringent latency service-level agreements (SLAs).A Publisher SDK for seamless integration that AI application developers can implement in just hours.A delivery infrastructure that includes pacing, frequency capping, budget management, and campaign throttling.An observability stack featuring real-time dashboards that track auction win rates, fill rates, revenue, and latency percentiles.