Coast builds modern financial services for the U.S. B2B card payments sector, with a focus on commercial fleets and drivers. Many existing technologies in this space lag behind customer needs, so Coast aims to deliver digital tools and transparent financial products that improve daily work for drivers, fleets, and merchants. Backed by top venture funds in fintech and mobility, Coast is growing quickly. Role Overview The Foundations team sits at the core of Coast’s engineering efforts. This group owns essential services like payment processing, transaction authorization, and SMS communications that keep drivers informed about their spending. As a Full-Stack Product Engineer on this team, expect broad exposure across engineering, product, risk, underwriting, finance, and design. The role offers a high degree of autonomy and visibility, making it well suited to those who enjoy taking ownership and collaborating across disciplines. What You Will Do Build and maintain core systems that enable secure, reliable transactions for Coast customers Develop and refine features that support payment processing and communications with drivers Work closely with teams across the company to ensure solutions meet business and user needs Iterate quickly to deliver improvements, gather feedback, and integrate quality at every step Help shape technical decisions and product direction in a fast-growing startup Who We’re Looking For Full-stack engineers who are practical, business-minded, and innovative Comfort working in a collaborative environment with a focus on rapid iteration Strong sense of ownership and ability to operate with autonomy Interest in building foundational systems that impact the entire organization Location Requirement This position is open only to candidates based in New York City and the tri-state area. The Coast office is located in SoHo, Manhattan, offering a creative and energetic setting for in-person collaboration.

Join Antimetal as a Full-Stack Product Engineer, where you'll be at the forefront of crafting our core product driven by innovative AI technology. Your role will involve designing robust APIs, orchestrating system layers, and implementing essential business logic while creating seamless and user-friendly interfaces.We seek a proactive individual who thrives in tackling ambiguous challenges, managing projects from inception to completion, and effectively translating user feedback into actionable product enhancements.About AntimetalAntimetal is revolutionizing infrastructure management. Our mission is to create a platform that not only identifies and resolves issues but also anticipates them, allowing engineers to reclaim their time for what they excel at: developing exceptional products.Your Responsibilities:Develop AI-driven tools and productsDesign and implement new features across the technology stack, from backend data models to React-based frontendsEngage with users to gather insights and shape product developmentCollaborate with design teams to enhance frontend experiences and establish interaction standardsLead projects through uncertainty, breaking them into manageable milestones and ensuring timely deliveryWork closely with customers to refine features and validate the product trajectoryYour Qualifications:5+ years of experience in professional software engineering within full-stack rolesProven track record of owning projects from start to finish in a startup environmentStrong proficiency in Typescript, React, Postgres, and NestJSDemonstrated ability in product design, crafting features that resonate with usersCapability to lead initiatives through ambiguity and drive alignment across cross-functional teamsPreferred Qualifications:Experience with AI-native product developmentBackground in development tools, infrastructure, or observabilityFamiliarity with cloud infrastructure (AWS, Docker, Kubernetes, Terraform)Experience in direct customer engagement to shape product offeringsPrevious exposure to shaping product direction based on user interactions

Join Allium: Pioneering Blockchain Data SolutionsTaming the Chaos of Blockchain DataAt Allium, we believe that blockchain data should be accessible, clear, and efficient. Since our inception in late 2021, we have recognized the complexities surrounding blockchain data, which, despite being public and free, is often cumbersome to interpret and manage. For example, answering a simple query like “Who are the biggest Ethereum token holders over time?” typically requires substantial engineering effort, including running RPC nodes, ingesting large datasets, and performing extensive data transformations.Overcoming the Challenges of Data AccessThe inherent structure of blockchains has traditionally favored Writes (data entry) over Reads (data retrieval). This design choice was made to enhance transaction throughput and build robust consensus algorithms. Consequently, extracting reliable data at scale has become a significant challenge.The Need for Expertise in Blockchain DataParsing and interpreting blockchain data necessitates both specialized knowledge and advanced data manipulation skills. As noted by Columbia Professor Tim Roughgarden, “Blockchains are (virtual) computers, not databases.” This complexity gives rise to diverse data schemas tailored for specific applications, making standardization crucial yet difficult. Our team is dedicated to transforming intricate technical outputs into comprehensible insights on concepts like tokens, NFTs, stablecoins, and decentralized exchanges (DEXs).Allium: Simplifying Blockchain Data QueriesAllium is committed to streamlining the chaos of blockchain data through our innovative approach to data ingestion, sanitization, and standardization. To date, we have archived data from over 100 blockchains, accumulating petabytes of information and continuously expanding.A Mission to Organize Blockchain DataJust as Google and Bloomberg organized the world’s public financial and web data, Allium is on a mission to do the same for blockchain data. We are at a pivotal moment in history where indexing vast public datasets is essential for industry advancement, and we are proud to support innovators and contribute to the growth of this sector.

Join Our Team at TennrAt Tennr, we revolutionize the referral process in healthcare. When a patient is referred to a specialist, the journey can often be fraught with delays and confusion. We bridge this gap by ensuring every referral reaches the right specialist with the necessary information promptly, empowering healthcare providers to enhance their efficiency and service delivery.Your RoleWe are seeking a dynamic Full Stack Product Engineer who thrives on transforming innovative ideas into practical solutions that address real customer challenges. You will be responsible for designing and implementing features that span frontend and backend systems, thereby delivering substantial value to our clients. This includes creating database schemas, developing backend APIs, and designing user-friendly interfaces that healthcare professionals adore.In collaboration with product and design teams, you will gain insights into user interactions with our platform and translate these into strategic product enhancements. Additionally, you'll partner with sales and customer success teams to integrate valuable customer feedback into our product offerings. You will engage with cutting-edge artificial intelligence techniques, positioning yourself at the forefront of technological advancements in the healthcare space.Ideal candidates will possess a founder’s mindset, excel in fast-paced, ambiguous environments, and take ownership of the entire lifecycle of features—from ideation through implementation to continuous improvement. You will spearhead performance optimization initiatives, ensuring code quality, scalability, and adherence to best practices as we expand.This position is ideal for a versatile engineer eager to work across the software stack and passionate about creating impactful user experiences that shape the future of healthcare.

Role overview Rowspace seeks a Full Stack Product Engineer in New York City to help shape and build its platform. This position spans the full product lifecycle, from early development through launch. Projects include building data pipelines that transform long investment memos into searchable formats, designing interfaces for analysts to trace AI-generated answers back to original sources, and deploying custom agent workflows based on real customer feedback. What you will do Design and implement user interfaces that fit smoothly into investors' daily routines. Develop APIs to integrate Rowspace with chat platforms, custom workflows, and external tools such as ChatGPT, Claude, and Excel. Build ingestion pipelines that organize unstructured data like PDFs, emails, and spreadsheets into a unified knowledge system. Work directly with customers to understand needs and deliver solutions quickly. Maintain high standards for security, privacy, and reliability when handling sensitive investment data. Create evaluation sets to test and validate the reliability of LLM systems. Requirements Experience delivering full-stack products using tools such as React/Typescript and Python or Node (or similar stacks). Enjoy designing scalable data models and APIs, and take pride in refining schemas. Motivated to bring AI into production, focused on building reliable products that deliver value to customers. Background in finance or fintech is helpful, but curiosity about investor workflows is essential. Committed to engineering quality, improving workflows, sharing knowledge, and maintaining high standards. Interested in joining early, as one of the first 20 engineers at a Series-A startup, with real ownership and impact. Benefits Comprehensive medical, dental, and vision insurance. 401(k) plan with employer matching while employed at Rowspace. Unlimited Paid Time Off (PTO) policy.

About TraversalTraversal stands at the forefront of AI Site Reliability Engineering (SRE) for enterprises, trusted by major corporations globally to effectively troubleshoot, remediate, and preemptively address complex production incidents. Our mission is to liberate engineers from constant firefighting, allowing them to concentrate on innovative, impactful work.With deep roots in AI research, we are channeling scientific rigor and creativity into establishing a leading AI agent lab for enterprises. We take pride in assembling a talented and collegial team, including researchers from prestigious institutions such as MIT, Harvard, and Berkeley, along with world-class engineers from industry leaders like Citadel Securities, Cockroach Labs, and Datadog. Together, we tackle some of the toughest challenges in AI.The RoleAs a Full-Stack AI Engineer at Traversal, you will be instrumental in designing and building the essential product interfaces fueled by our AI Site Reliability Engineer. This position is perfect for engineers who relish the challenge of owning intricate systems from start to finish, encompassing everything from user interfaces to backend services and infrastructure. You’ll transform advanced AI capabilities into reliable, production-grade product experiences utilized by engineers managing large-scale systems. The ideal candidate will possess a blend of strong product intuition and profound engineering insight, and will be adept at navigating the entire tech stack—from distributed systems and data pipelines to dynamic front-end applications. Collaboration will be key as you work closely with product teams, AI researchers, and infrastructure engineers to define the platform architecture and develop features that facilitate real-time incident detection, root cause analysis, and automated remediation in complex production settings.ResponsibilitiesProduct Ownership: Lead the end-to-end development of core product functionalities, converting AI-driven insights into user-friendly workflows that empower engineers and minimize cognitive load.Technical Architecture: Design scalable system architectures that encompass frontend, backend services, and data infrastructure to support real-time observability and automated operations.API & Platform Development: Create and implement high-performance APIs and service layers that drive the product and ensure seamless integration between AI systems, backend services, and user interfaces.

Join a pioneering AI engineering team in New York City, dedicated to creating and scaling innovative AI-driven products that will revolutionize user experiences for millions. Our workspace is akin to a state-of-the-art AI laboratory, merging groundbreaking innovation with the extensive reach of our diverse ecosystem. The team comprises exceptionally skilled AI engineers, full-stack developers, product managers, and designers all committed to expanding the possibilities of AI technology.General InformationWe are on the lookout for extraordinary engineers who have successfully deployed AI features that are actively utilized in production environments. The ideal candidate should possess full-stack capabilities, flourish in dynamic and collaborative settings, and have a fervent passion for crafting seamless user experiences powered by AI.Key ResponsibilitiesDesign, develop, and launch user-centric AI features across various products, including content creation tools, e-commerce recommendations, and messaging platforms.Quickly prototype and refine AI-driven solutions, transforming them into robust production-ready systems.Work in close collaboration with product managers, designers, and fellow engineers to conceptualize, implement, and scale innovative features.Remain informed about advancements in AI technology and utilize them to enhance user experiences.Contribute to the technical vision and strategy for the progression of AI products within the ecosystem.RequirementsA proven history of successfully deploying AI features into production with verifiable user engagement.Hands-on experience with large language models (LLMs), either through APIs or custom implementations, at scale.Proficient full-stack development skills in PHP, Python, or JavaScript.Capability to create high-performance AI-enhanced user interfaces.Preferred QualificationsExperience in developing consumer AI products that have grown to serve large user bases.Strong proficiency in PHP.Familiarity with WordPress, e-commerce platforms, or messaging frameworks.Contributions to open-source projects demonstrating technical acumen and innovative thinking.BenefitsBecome part of a meticulously selected team comprising some of the brightest minds in AI and product development.Open to both on-site and remote candidates.Develop products that will have a direct impact on millions of users across a varied ecosystem.Opportunity to be part of an elite AI laboratory with the capability and reach of a global platform.Long-term, full-time role.

Valthos Inc. develops software and biological AI systems aimed at protecting humanity. The team includes experts from Palantir, MIT's Broad Institute, and DeepMind, with experience spanning autonomous vehicles, rocket landing, and biological design. Their current work addresses the challenges of nature's mutational complexity for both federal and commercial applications. Role overview Valthos is seeking a full-stack product engineer in New York to help build a new biodefense platform. This role focuses on designing and developing the user-facing layer of the company's biodefense operating system. The engineer will create interfaces that highlight anomalies and deliver insights from biological data, making complex workflows more accessible and efficient. What you will do Design and implement intuitive interfaces for the biodefense platform Develop and maintain full-stack systems that support these user experiences Transform complex biological data and workflows into clear, actionable products Work closely with engineers and scientists to refine and deliver solutions Team and collaboration Work alongside software and biological machine learning engineers with backgrounds at organizations such as Palantir, MIT's Broad Institute, and DeepMind. The team values technical depth, strong product instincts, and a commitment to making computational biology more accessible. Location This position is based in New York.

About HyphaHypha is an innovative AI-driven platform that is redefining asset management across its entire lifecycle—covering acquisition, management, and exit strategies. Our primary focus is on healthcare facilities and multifamily real estate, and we are making significant strides in transforming the industry through three core pillars:Observability: Delivering real-time insights into asset performance, deal progression, and market conditions for all stakeholders involved.Intelligence: Empowering AI-driven, multidimensional optimization that includes risk assessments, tax strategies, and benchmarking capabilities.Orchestration: Developing streamlined workflows and a unified source of truth to eradicate inefficiencies.Role OverviewIn the position of Senior/Staff Full Stack Product Engineer at Hypha, you will be responsible for the development and ownership of features that users interact with on a daily basis. This encompasses systems such as data visualization, entity management, search functionalities, dashboards, and document workflows. You will collaborate closely with product and design teams to translate complex challenges into intuitive product experiences.This role occupies a pivotal space at the intersection of frontend, backend, and product strategy. You will lead the design and implementation of features from start to finish while contributing to the evolution of the product. The emphasis is not merely on coding but on deeply understanding user challenges, making informed product and technical decisions, and crafting thoughtful, well-designed solutions.We are looking for senior and staff-level engineers who can operate with a high degree of autonomy, manage complex product systems, and help establish engineering standards as Hypha grows. Compensation will be commensurate with experience, technical expertise, and scope of responsibility.Core CompetenciesDesign and deliver full-stack product systems utilizing React, Next.js, APIs, and PostgreSQL-based services.Take ownership of features from ideation through to production, including technical design, implementation, edge case handling, and overall product refinement.Construct scalable, maintainable systems across both frontend and backend that facilitate complex workflows and data-rich interactions.Collaborate closely with product and design teams to define project scope, challenge existing assumptions, and iteratively deliver with sound judgment.Make informed decisions regarding application architecture, state management, data modeling, and backend development.Enhance engineering quality through rigorous code review, improved abstractions, and stronger production practices.

About UsSapien is revolutionizing the operational dynamics of finance teams in the AI era. Our vision is to create an autonomous CFO—a comprehensive system managing company financials seamlessly. Our platform provides real-time analytics of intricate financial data, enhancing decision-making speed, mitigating costly errors, and delivering substantial value. We have successfully identified multi-million-dollar discrepancies, preserved thousands of jobs, and significantly boosted our clients' profitability.Partnering with diverse industries—manufacturing, healthcare, dining, and large corporations—we strive to thoroughly grasp and automate their financial workflows. Based in Madison Square Park, NYC, we have garnered support from General Catalyst, Neo, and leading professionals from Google, OpenAI, Microsoft, Ramp, and Stripe, raising over $9M.Position OverviewAs a Full-Stack Engineer, you will develop features from inception to deployment for Sapien's core platform. This encompasses transforming designs into frontend implementations, crafting backend APIs, modifying databases, and integrating agents. You will take ownership of the entire user experience, ensuring functionality and performance.In this role, you will strike a balance between launching innovative features and maintaining platform stability and performance. Engaging directly with clients, you will observe how they utilize your developments and refine them based on genuine feedback.Key ResponsibilitiesDevelop features that position Sapien as an essential tool for finance teams, crafting experiences that engage users daily by proactively delivering insights and addressing potential issues before they escalate.Create intuitive interfaces that simplify complex operations for finance professionals lacking technical expertise.Establish human-in-the-loop systems allowing users to provide feedback, rectify mistakes, and educate the system on specific business processes, enhancing agent intelligence over time.Make pivotal product and technical choices: determine feature functionalities, UI design, database architecture, and appropriate technologies. You will not merely implement specifications; you will conceptualize what to build.QualificationsProficient in modern web technologies such as React, TypeScript, Python, SQL, and common backend frameworks. While you don’t need to be an expert in all areas, you should be capable of navigating the entire stack.A product-oriented mindset, prioritizing user experience in your development approach.

About Us:At Zealthy, we are dedicated to revolutionizing healthcare by ensuring that high-quality services are accessible to everyone, regardless of their location. Our mission is to develop the largest and most trusted virtual healthcare platform in the world, transforming the delivery of care for individuals everywhere.Founded by a successful healthcare entrepreneur with a history of scaling businesses to impressive valuations, Zealthy is poised for sustainable growth as we strive to fulfill our ambitious vision. Our relentless focus on quality and accessibility is at the core of everything we do.Our team is committed to making a difference in patients' lives. While our in-office work culture typically runs Monday to Friday and often extends beyond standard hours, the true satisfaction comes from the impact we make. As a full-time team member, you will not only contribute to shaping the future of healthcare but also enjoy the benefits of equity ownership, as we believe in sharing our success with every contributor.If you are not ready to fully commit to your role and contribute to our vision of creating the world's largest and highest quality telemedicine company by working on-site four days a week, we kindly ask you to refrain from applying.Join us in redefining the future of healthcare.The Role:We are currently seeking a dedicated Full Stack Developer to join us full-time. Please note that this is an in-person role located in New York, NY. If you are looking for remote or hybrid opportunities, this position may not be the right fit for you.What You'll Do:You will begin your journey as a Full Stack Software Engineer at Zealthy, joining a team of five full-time engineers. You will work closely with the Founder/CEO, who oversees product development. Your initial focus will be on iterating our early product build to ensure it’s primed for scaling and enhancing access to high-quality healthcare.Participate in daily standup meetings, weekly sprint discussions (or a more fluid Kanban process), and hold yourself accountable to an ambitious product development roadmap.Being an early-stage startup, you will often wear multiple hats, engaging in both front-end and back-end development, and possibly taking part in or leading system architecture or DevOps decision-making.As the organization grows, there will be opportunities for you to step into a leadership role, should your performance be strong and you express a desire to lead. This will be an ongoing conversation as you integrate into the team.

Role Overview rockstar-3 is hiring a Senior Full-Stack Engineer in New York, NY. This role focuses on building and improving applications across both front-end and back-end. The work centers on creating software that supports user needs and business goals. What You Will Do Develop and maintain applications using front-end and back-end technologies Collaborate with team members to design features and solve technical challenges Contribute to projects that improve user experience and support business growth Location This position is based in New York, New York, United States.

About BettermentBetterment is a premier technology-focused financial services firm dedicated to providing innovative investing and retirement solutions for individual investors and financial advisors. We also offer comprehensive financial wellness services, including a streamlined 401(k) plan for small and medium-sized enterprises. Our passionate team is committed to our mission: empowering individuals to build wealth with confidence and ease. We are based in NYC and offer hybrid positions requiring in-office attendance four days a week.About the Role:The Advisor Experience team is on a mission to create the leading full-service investment management platform in the market. As part of Betterment Advisor Solutions, our focus is on equipping financial advisors with the essential tools to effectively manage their clients on our platform. We take immense pride in delivering exceptional user experiences that simplify complex needs. We are seeking a technical leader who will propel this team forward while maintaining high standards for quality and execution for Core Registered Investment Advisors.As a senior engineer, you will be instrumental in designing and implementing intricate systems within our domain, guiding your team's full stack development practices, and collaborating with senior engineering leaders to enhance Betterment's technology, ensuring high performance, reliability, and an outstanding developer experience.If you have a passion for creating delightful customer experiences and developing scalable, high-performance web applications in a collaborative, forward-thinking environment, we would love to welcome you to our team.

About Sailor HealthSailor Health is dedicated to addressing the urgent mental health crisis affecting older adults. In the U.S., seniors are the demographic with the highest suicide rates but often lack adequate mental health services. With projections indicating that by 2030, over 65 million seniors will represent nearly a quarter of the U.S. population, this issue demands immediate attention.We are developing an innovative platform focused on senior mental health, facilitating connections between older adults, therapists, healthcare professionals, and insurance providers. Our AI-driven operating system enhances care coordination, provides real-time clinical insights, and simplifies insurance billing, allowing therapists to dedicate more time to compassionate care.Our rapid growth and partnership with Medicare enable us to deliver exceptional and affordable psychotherapy to hundreds of patients. We are proud to have the support of distinguished founders from Ramp, Nourish, Headway, Charlie Health, and Spring Health.⭐ About the RoleLocation: HQ - New York City - Remote.We are seeking a Founding Full-Stack Engineer who will spearhead the development of our AI-enhanced platform from its architectural design through to launch. You will collaborate closely with our co-founders to establish the systems and AI infrastructure that drive our platform, including tools for therapists and care navigation support.This is a unique opportunity to create and launch an AI-first product from the ground up at a startup that has achieved exceptional product-market fit. You will be responsible for significant technical decisions, influence our engineering culture, and rapidly bring innovative ideas to fruition. If you thrive in a fast-paced environment and seek to make a meaningful impact through your coding, we want to connect with you.

Senior Full Stack EngineerLocation: New YorkOn-site | Full-timeJoin mlabs, the driving force behind the world's largest memecoin launchpad. Our infrastructure is characterized by ultra-low latency, exceptional throughput, and a continual load, designed for an arena where precision is imperative and the stakes are sky-high.The RoleAs a Senior Full Stack Engineer, you will be pivotal in designing and scaling the future of crypto-social finance. This is not a conventional position; we operate at the forefront of Web3 innovation and seek an individual who excels under pressure.What You'll Do:End-to-End Ownership: Spearheading features from initial ideation to production deployment, exercising substantial autonomy.Full-Stack Architecture: Engaging with the complete stack—from robust backend systems to refined frontend interfaces—ensuring a cohesive and scalable user experience.Rapid Iteration: Quickly prototyping and deploying new features while maintaining system integrity.Complex Problem Solving: Tackling technical challenges unique to high-scale crypto platforms where efficiency reigns supreme.Collaborative Innovation: Partnering with a top-tier team of engineers and designers to push the boundaries of social finance.

About N1:N1 is a groundbreaking, hyper-efficient, and horizontally scalable blockchain network, crafted to facilitate trustless computing on an internet scale. Our diverse team boasts expertise from prestigious institutions such as Harvard, CMU, DFINITY, VMware, and Galaxy Digital, and is supported by leading investors including Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:We are on the lookout for a dedicated Full Stack Software Engineer to become a vital part of our engineering team. This full-time role encompasses the development of front-end, back-end, and database applications, particularly focused on innovative blockchain products. The ideal candidate will be highly organized, service-oriented, resourceful, and possess a strong product mindset. You will take ownership of enhancing our web platforms and internal tools, ensuring they are user-friendly, secure, and optimized for high performance.

Join our innovative team at Vantage as a Senior Full Stack Engineer. In this role, you will leverage your expertise in both front-end and back-end technologies to develop and maintain robust applications. You will collaborate with cross-functional teams to deliver high-quality software solutions, utilizing modern frameworks and best practices.

About the RoleJoin april as a Senior Full-Stack Engineer, where your innovative mindset and data passion will contribute to revolutionizing tax solutions for millions. We're seeking a talented individual ready to lead projects, enhance customer experiences, and drive professional growth. Based in the New York City metropolitan area? You'll need to collaborate on-site at least three days a week.Key ResponsibilitiesTake ownership of end-to-end projects that impact millions of users, from concept to deployment.Collaborate with product management and UX teams to define product specifications and ensure seamless execution.Architect robust system designs and evaluate tool selections to optimize performance.Develop cloud-native microservices that enhance our platform's functionality.Mentor team members and elevate our technology stack and practices.

About HyphaHypha is an innovative AI-driven platform that is redefining asset management throughout its entire lifecycle—covering acquisition, management, and exit strategies. With a special focus on healthcare facilities and multifamily real estate, we are leading a transformative journey in the industry through three pivotal pillars:Observability: Ensuring real-time insights into asset performance, deal progress, and market dynamics for all stakeholders.Intelligence: Facilitating AI-powered multidimensional optimization, complete with risk assessments, tax strategies, and benchmarking.Orchestration: Crafting seamless workflows and a unified source of truth to eradicate inefficiencies.Role OverviewAs a Full Stack Product Engineer at Hypha, you will be at the forefront of building the features that our users rely on daily. Your responsibilities will include developing systems for data visualization, entity management, search functionalities, dashboards, and document workflows. You will collaborate closely with product managers and designers to translate complex challenges into clear, user-friendly product experiences.This role sits at the crossroads of frontend, backend, and product strategy. You will engage across the entire technology stack, delivering features from concept to production, while also influencing the product's evolution. The emphasis is on more than just coding; it’s about deeply understanding user needs and crafting thoughtful, well-designed solutions.We are eager to hire candidates from diverse experience levels for this role, ranging from early-career engineers to seasoned professionals with extensive systems and product backgrounds. The level of the position and corresponding compensation will be established through the interview process.