2,914 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Senior Software Engineer
Senior Software Engineer at Breeze building and scaling core payment systems for an AI-powered global commerce infrastructure platform. Hands-on, end-to-end feature ownership across the stack using React.js and serverless/cloud infrastructure, based in a hybrid New York City office (3 days/week).
Staff Software Engineer
Staff Software Engineer at Breeze, a Singapore-based startup building an AI-powered payments and commerce infrastructure layer. You'll own complex full-stack systems end to end — React/TypeScript frontend, Node.js backend on serverless infrastructure — while setting architectural direction and mentoring engineers.
Staff Software Engineer, Secure Execution
Staff Software Engineer on Harvey's founding Security Engineering team, building the secure execution platform that lets AI agents safely run security work like automated vulnerability discovery and authorized penetration testing. Day to day: designing sandboxing, orchestration, and access controls using Go/Rust/Python/C++, Linux, containers/microVMs, and cloud infrastructure.
Staff/Lead Python Engineer (FastAPI, Orchestration)
Mimica (an AI process-intelligence startup) is hiring a Staff/Lead Python engineer to build resilient backend services that integrate with its ML models across one of three teams (automation engine, ML data labelling, or data pipelines). Day to day: Python/FastAPI service architecture, async programming, observability with the Grafana stack (Prometheus, Loki, Tempo), and mentoring in the Python Ch
Senior Software Engineer, Core Systems
Senior Software Engineer on the Core Systems team at Panthalassa, a renewable ocean-energy company, designing and building the onboard data systems of ocean energy nodes — network-facing software, bandwidth-efficient egress pipelines, and resilient storage for harsh marine environments. Requires 7+ years of software experience with systems programming and networking; hybrid role based in Portland,
Software Engineer, Systems
Generalist systems engineer at a defense power-products company, working across the entire stack: embedded controls on rugged hardware, data pipelines over intermittently connected networks, and the backend services, databases, and cloud systems on top. Core focus is systems programming in C, C++, or Rust; onsite in San Bruno, CA.
Member of Technical Staff – Research
Founding research hire at a London frontier lab building a visuo-tactile foundation model for dexterous robot manipulation. You own the model architecture (fusing vision and touch), the post-training recipe (imitation, reinforcement/self-improvement), and getting policies working on real hardware.
Staff Product Engineer — AI-Native Developer Tools
Hands-on staff-level individual contributor setting technical direction for new AI-native developer tools at a Series B developer-infrastructure startup (CI acceleration, agent sandboxes). Ships 0→1 products end-to-end using TypeScript/React, strong systems design, and agentic AI workflows, fully on-site 5 days/week in Flatiron, NYC.
Senior Software Engineer
Senior full-stack engineer at PLACE, a hypergrowth real estate technology startup, building and scaling web experiences for real estate professionals and consumers. Day to day: shipping features with React/Next.js and NestJS (Node.js), designing GraphQL APIs, and maintaining CI/CD in Azure DevOps with Serverless/Kubernetes deployments. Hybrid role based in Bethesda, MD.
Member of Technical Staff - Engineering Lead, Compute Platform
Lead a team of systems engineers building and operating a Kubernetes-based compute platform distributed across multiple neo-clouds. You’ll hire and grow engineers, guide architectural decisions for multi-cloud scheduling, GPU cluster management, and fault tolerance, and stay hands-on with the technical stack. Tech includes Kubernetes, GPU hardware, NCCL, and high-performance storage like VAST.
Senior Software Engineer
Senior Software Engineer at Wealth.com building and scaling TypeScript backend services for its estate planning, tax planning, and AI products used by financial advisors. Owns features from design through deployment and monitoring, working with REST/gRPC APIs, cloud infrastructure (AWS/GCP/Azure), Docker/Kubernetes, and CI/CD. Hybrid role based in the New York City office (3 days/week).
Member of Technical Staff: Junior AI Researcher
Develops foundation models for communication integrity, focusing on deepfake detection and media forensics. Tasks include training experiments on multi-GPU setups, data curation, and fine-tuning using Python and PyTorch.
Software Engineering Team Lead
Hands-on engineering team lead for a new New Zealand peer-to-peer marketplace startup. Day to day you write code across a TypeScript stack (React Native/Expo, Supabase, PostgreSQL, Stripe), support production and scale, and lead internal development while coordinating an external software partner.
Lead Propulsion Integration Engineer
Apex, a satellite bus manufacturer in Los Angeles, is hiring a Lead Propulsion Integration Engineer to own spacecraft propulsion modules end to end — from requirements and tank/feed-system design through integration, propellant servicing, and launch. It's a hands-on technical leadership role leading the propulsion integration team.
Field-Deployed Software Engineering Intern – Fall 2026 / Spring 2027
GITAI is hiring a part-time, field-deployed software engineering intern to support development, integration, and testing of its space robotics and satellite hardware, including regular testing at a desert test site near Los Angeles. The role mixes hands-on hardware bring-up and debugging with software work in robotics, computer vision, or GNC using Python or C++ on Linux.
Software Engineer, Strategic Projects
Build and harden AI-native prototypes into production-grade connectivity tools, using coding agents and Go while collaborating with customers to embed Tailscale’s identity-aware networking.
Software Engineer, Networking (Dataplane)
Software Engineer on Tailscale's Dataplane team builds and maintains the client-side networking software behind Tailscale's mesh VPN — designing connectivity features (clients, subnet routers, exit nodes), optimizing performance across platforms, and debugging escalated customer network issues. Core tech: deep networking (routing, VPNs, NAT traversal) with Go or C/C++/Rust.