2,917 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Software Engineer
Backend software engineer at Covet Health, an API-first healthcare TPA and benefits provider, hybrid in New York and reporting to the CTO. As an early engineering hire, they design and build server-side systems, databases, microservices, and APIs using tools like Spring Boot/Python/Node.js, PostgreSQL/Redis, Docker/Kubernetes, and AWS/GCP.
Software Engineer
Software engineer at an early-stage NYC startup doing 0→1 product work with high autonomy and end-to-end ownership of architecture and shipping. Hybrid role in New York City (Mon–Thu in office). Stack: Python/TypeScript, React/Next.js, Node.js, PostgreSQL, AWS, Docker/Kubernetes. $150K–$250K base plus equity.
Chief Technology Officer
Hands-on CTO at Kodama Systems leading a seven-person software and hardware team building autonomy and physical AI for forestry heavy equipment, driving the transition from production teleoperation to autonomous operation and owning safety-critical systems, the technical roadmap, and external technical representation.
Senior Software Engineer
Senior engineer at Yardstik, a background-screening startup in Minneapolis, building full-stack features for internal/external APIs and UI on Ruby on Rails, PostgreSQL, Redis/Sidekiq, Docker, and AWS, with agile teamwork, code reviews, and on-call rotation. Not eligible for visa sponsorship.
Software Engineering Manager - Web Interfaces
Build and lead a brand-new Web Interfaces team at Ribbit, an autonomous-aircraft company: hire engineers, set the architecture and roadmap for the operator-facing web GUI and its backend services, and write code yourself while the team is small. Hands-on web stack work (React/TypeScript), hybrid in the Greater Toronto Area with participation in flight-test field operations.
Software Engineering (all levels)
Open call for software engineers at all levels at Luron AI, an applied AI company that deploys production voice/chat AI agents and model orchestration systems into large enterprises. Engineers work across AI, infrastructure, research, and product, often directly with customers, with no fixed stack or experience requirements.
Software Engineer (Remote)
Early-career remote backend engineer at Product Genius, an AI startup whose product makes mobile shopping convert like desktop for SMB online stores. You'll ship features in an agile team: server-side Python 3, caching, ML/RL architectures, modern databases, and AWS/GCP, pairing with engineers and ML researchers.
Founding Engineer
Founding engineer at Luabase, a 6-person, $4.5M-funded startup building a SQL-based data stack for web3 teams. You'd build real-time on-chain and off-chain data pipelines, a dbt-based modeling layer, a blockchain decoding layer, and optimize ClickHouse performance, using Python and SQL.
Product/Software Engineer
Senior/Staff founding engineer at an AI-native B2B software startup in San Francisco: designs and scales backend architecture end-to-end alongside the founders, mentors engineers, and works with the CTO on AI agent initiatives. Core stack: Python, Postgres, TypeScript, React, GCP.
AI Agent Software Engineer
Full-stack engineer on an Agent Engineering team at a San Francisco startup, building production AI agents that handle enterprise customer conversations via text and voice. You own features end-to-end (design through deployment) using Python, TypeScript, and LLM-based systems, working on-site 5 days/week. $200K-$290K/year.
Senior Software Engineer
Senior Software Engineer building and optimizing a Python/FastAPI backend on PostgreSQL for enterprise AI infrastructure aimed at financial institutions. End-to-end feature ownership at a small startup, working directly with technical founders; remote-first within Serbia with an optional Belgrade office.
Founding Engineer
Founding engineer taking broad technical ownership of the Audun platform, which modernizes collections workflows for operators and creditors. You'll work closely with the CTO and Chief Scientist across system architecture, fullstack development, applied AI, DevOps, and integrations with payment, messaging, and identity systems.
Software Engineer
Hands-on full-stack Software Engineer at a well-funded Amsterdam startup with 400+ paying customers, building core product features end-to-end in Python/FastAPI and helping shape architecture and the product roadmap with the founding team. Requires strong Python/FastAPI experience; Amsterdam-based or willing to relocate.
Engineering Manager / Tech Lead
Leads Terradot's São Paulo engineering team, working hands-on on the web and mobile software platform that manages Enhanced Rock Weathering carbon-removal projects end to end. Combines full-stack development (React, React Native, Python, SQL/Postgres, GCP) with people management and collaboration with US-based product and engineering leads.
Senior Rails Engineer
Senior Rails engineer at a venture-backed startup building cloud software for public agencies serving older adults and people with disabilities. Ships end-to-end Ruby on Rails features (Bootstrap, Stimulus, Postgres), designs data models, reviews code, and mentors 1–3 junior engineers.
Software Engineer (Data)
Themis Intelligence, an AI-first company building decision-support platforms for utilities, is hiring a Software Engineer (Data) co-op/intern in Canada (hybrid, four days per week in office). The role builds batch and real-time data pipelines, integrations, and RAG/semantic-search infrastructure using Python, TypeScript, and SQL.
Software Engineer
Builds back-end systems at Foundation Health, an AI operating system for pharmacy, connecting pharmacies, health systems and insurers. Day to day: designing event-driven distributed systems (retries, idempotency, failure recovery) and AI-powered features on a modern Node.js, TypeScript and GCP stack, hybrid from Manchester.
Software Engineering Internship (Thai Nationals)
Software engineering internship at Manatal, a Bangkok-based HR-tech SaaS startup (AI-powered applicant tracking system). The intern builds features end to end: developing RESTful APIs, working with MySQL/PostgreSQL/NoSQL, and coding SPAs (Vue/React/Angular) or Python APIs (Django/Flask/FastAPI), working on-site in Bangkok.
DeFi Web Developer (React, Node, Paris, relocation)
Full-stack web developer building the MVP web application for ZeroDays, a venture-backed startup creating a decentralized options (DeFi) network on Solana, working directly with the co-founders in Paris. Core stack is React, Node.js, TypeScript, and Next.js, with a deep understanding of blockchain required.