Founding Full-Stack Engineer: LLM/AI Infra & APIs
Transformcap
Transformcap is seeking a founding full-stack engineer to join our team in New York, NY. In this role, you will take ownership of core application components, including designing APIs and deployment workflows while collaborating closely with other co-founders. The role requires strong full-stack development skills, particularly in Python, FastAPI, and AWS. We offer competitive benefits including medical insurance, relocation support, and visa sponsorship for international applicants. #J-18808-Ljbffr Transformcap
$190k - $230k
...Founding Full-Stack Engineer Location: New York City Company Stage of Funding: Venture-Backed Pre-Seed AI Infrastructure Startup Office Type: In-Office... ...backend infrastructure, APIs, data systems, and... ...management. ~ Familiarity with LLM orchestration frameworks...SuggestedWork at office- ...backed pharma marketing. As a founding full-stack engineer, you’ll own core parts of... ...application stack, designing APIs, background workflows, and deployment... ...for packaging and shipping LLM “agents” to production.... ...production service. Cloud & infra: Ship to AWS, manage secrets...SuggestedVisa sponsorshipRelocation packageNight shift
- ...client building AI-powered products... ...generalist product engineer with 0 to 5... ...doing Build full-stack features end to... ...including AI or LLM-powered features... ...expanded scope, a founding title, or obvious... ...everyone touches infra, frontend, and everything... ...fundamentals: API design, data...SuggestedWork experience placement
- ...OffDeal is a AI-native investment bank offering small business owners a faster and... ...the American economy. The Role As a Founding Engineer, you'll work directly with the founders... ...to deployment Build across the entire stack, in our 100% TypeScript (i.e. ReactJS +...SuggestedFull timeWork experience placementCasual workRelocation package
- ...Our Products Our AI-powered suite of tools... ...proprietary statistical engine to test creatives 30%... ...Acorns, Bluechew, Found, Coffee Meets Bagel,... ...needle. You're a full-stack engineer with robust LLM, Node/Typescript and... ...js frontend, and LLM API based chat and classifiers...SuggestedFull timeWork at officeRemote work3 days per week
- ...Founding Fullstack Engineer (3–8 Years Experience) New York City (5 days on-site) ·... ...end —from database design to API contracts to pixel-perfect UI... ...want to use. Own the stack: design APIs, optimize queries... ...directly with nuclear SMEs and AI engineers to understand...Full timeFor contractorsImmediate start
- Covasant Technologies is seeking a .NET Full Stack Developer with AI/LLM exposure to join our enterprise team. This role focuses on building scalable... ...apps using .NET (C#, ASP.NET Core) and React/Angular, with API integrations and cloud readiness. You'll work on...Remote jobNight shift
$155k - $225k
...career , whether full-time or part-time.... ...profitable and personal. Founded in 2021 by seasoned... .../ Staff Full Stack Engineer to help build Fora’... ...growing suite of AI-driven products and... ...ambiguity, on top of APIs and SDKs that... ...experience shipping LLM-powered features in...Full timePart timeWork at officeWork from home- ...About the Team OpenAI’s API Platform organization builds the products and infrastructure... ...About the Role We’re looking for full stack and frontend engineers to help define and build the next... ...-facing teams to make complex AI capabilities simple to understand, easy...Full timeInternship
$160k - $230k
...Labs is a stealth-mode, AI-native startup... ...Role We are seeking Full Stack Engineers with deep experience... ...functionality and backend APIs Shape the stack: work... ...: integrate AI/LLM capabilities into workflows... ...side-by-side with the founding team in a supportive,...Full timeWork at officeLocal area$250k
A fast-growing tech company in New York is seeking a Founding Engineer to build and ship assessment tools that simulate technical interviews... ...staffing firms evaluate technical talent. Experience with full-stack web applications and a passion for equitable tech hiring are...- ...falling behind on AI adoption. Their... ..., the LLM orchestrates - it... ...The Team The founding team spent a combined... ...built the analytics engine behind $100M+... ...modern AI and data stacks, plus the... ...Database queries, API response times,... ...data sources. Infra: AWS. AI: Model...Full timeWork at office
$170k
...This is a rare Founding Engineer (potential CTO)... ...a seed-stage, AI-native digital... ...engineering culture and stack for the next... ...You'll own the full technical... ...other frontier LLM-based systems,... ...PostgreSQL and modern infra (Vercel, Fly,... ..., wearable APIs, or real‑time biosignal...- A fintech company in New York is seeking a Full Stack Engineer focused on web development to enhance their AI-powered lending platform. The role involves developing scalable applications, building APIs, and ensuring optimal user experience. Candidates should have a background...Remote job
- ...and billing through smart technology and AI. Our goal is to make navigating... ...About the Role We’re looking for a Full Stack Engineer who’s excited to build elegant, scalable... ...develop user-facing features, design backend APIs, and help define our architecture as we...Full timeWork at officeRemote work
$130k - $150k
...startups through exits as founding-team members. We're... ...longevity movement in full swing, and AI unlocking what wasn't... ...re looking for a Full Stack Engineer to join a small, high-... ...GraphQL, MongoDB Cloud & infra: Google Cloud, including the Healthcare API AI tooling: Claude...Work at officeRemote workShift work$166.5k - $215k
...we’re the leading AI company revolutionizing... ...operations. Founded by builders and technologists... ...00+ employees (50+ engineers), we’re scaling... ...point. Our full-stack engineers work within... ...-on with our core LLM-enabled agentic... ...state management, API calls, backend controller...Work at officeRemote workFlexible hours$120k - $180k
Overview Founding Full-Stack Engineer (EMS Experience Required) Join to apply for the Founding Full-Stack Engineer (EMS Experience Required) role at... ...transforming emergency medical services (EMS) through AI-powered tools. We are building the greatest tools ever made...Full timeWork at office- ...Join SignalFire’s Talent Network for Founding Back-end Software Engineer Roles at VC-Backed Startups This is... ...spans 200+ innovative companies across AI, cybersecurity, healthtech, fintech,... ...founders ✔ Interested in building APIs, microservices, and cloud infrastructure...Full time
- Kinetic is seeking a founding engineer for PayMe, a fast-growing fintech product based in New York. In this role, you will transform ambiguous... ...closely with product, growth, and design teams, and leverage AI heavily in your work. This is an exciting opportunity to shape...
- ...is to harness frontier AI for everyone building... ...continue growing our engineering team. About the role... ...We’re looking for a founding BE infrastructure engineer... ...: Backend or even full-stack development of new... ...engineering as needed (infra, BE, ideally even full...Full timeWork at officeFlexible hours
- ...falling behind on AI adoption. Their... ..., the LLM orchestrates - it... ...The Team The founding team spent a combined... ...built the analytics engine behind $100M+... ...modern AI and data stacks, plus the... ...library and the API it calls in the... ...data sources. Infra: AWS. AI: Model...Full timeWork at office
- Neptune is seeking a founding Full-Stack Engineer to help build a shared operating system for couples, combining AI with vetted financial and legal workflows. You’ll be employee #1 on engineering and work directly with our CTO to shape product direction. You will own features...
- ...Founding Fullstack Engineer (3–8 Years Experience) Location: New York, NY (In‑Person) Compensation: Top... ...Everstar Everstar is a nuclear AI company accelerating regulatory and compliance... ...Top of market salary + equity Full benefits, wellness stipend, and education...Full time
$160k - $210k
...seeking a proactive and results-driven Full-Stack Engineer to join our AI team. Reporting directly to the Head... ...financial agent. Develop scalable APIs and backend services to support agent... ...practices. Stay up to date with LLM frameworks, full-stack tools, and financial...Remote jobFull timeWork at office- ...ground truth platform for AI. Generic tools... ...trustworthy data. Kepler was founded by two Palantir... ...Quiver (the analytics engine behind $100M+ deals with... ...experience. You own the full stack: React interfaces that... ...size, database queries, API response times. The full...Full timeWork at office
- ...Full Stack Software Engineer About Patlytics: Patlytics is the fastest-growing AI-native patent intelligence platform, transforming how IP... ...backend, Next.js frontend, and LLM inference pipeline, each... ...experience in Full Stack and API development within an agile...Full timeWork experience placementImmediate startRemote work
$225k
...Staff+ Software Engineer, Backend and Infra Haize Labs takes AI-based applications from proof-of-concept to production. We eliminate risk and improve the reliability of LLM-based applications by haizing them – i.e. rigorously, proactively, and continuously fuzz-...Full timeWork at officeVisa sponsorship- Nomic, Inc. is seeking a Senior Software Engineer for their New York office. This hybrid role... ...Nomic platform, where you'll work on UI, APIs, and backend services primarily using Python... ...engineering, with a strong focus on using AI coding tools as part of their workflow....Work at officeFlexible hours
- ...currently seeking a Senior Full Stack Developer - Hybrid... ...and scalable APIs and backend... ...deployment processes with infra as code (IaC) understanding... ...and deep learning/ LLM... ...Information Technology, Engineering, or equivalent work... ...the world's leading AI and digital infrastructure...Work experience placementWork at officeRemote workFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Full-Stack Engineer: LLM/AI Infra & APIs. Be the first to apply!
- mid level full stack developer New York, NY
- full stack java developer New York, NY
- junior full-stack web developer New York, NY
- full time engineer New York, NY
- senior java full-stack developer New York, NY
- full stack cloud developer New York, NY
- full stack developer contract New York, NY
- full stack react developer New York, NY
- remote .net full stack web developer New York, NY
- junior full stack developer New York, NY



