2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Technical Partner / Founding Engineer
Founding engineer / technical partner to take an already-built Lovable-based SaaS platform for life insurance agents from functioning MVP to a secure, scalable, commercially ready product — security auditing, auth and RLS hardening, Stripe, deployments, and feature work — under a long-term revenue-share partnership. Stack: React, TypeScript, Supabase, PostgreSQL.
Founding Engineer (CTO Track)
Founding engineer (CTO track) at a Vancouver health-tech startup building an at-home cellular health testing platform. ~80% hands-on ownership of product, cloud infrastructure, longitudinal health data systems, and ML-driven personalized insights, plus architecture and vendor management. Requires full-stack (mobile/backend/cloud), applied ML, and security/privacy judgment.
Technical Founding Engineer
Founding engineer at wiive, an early-stage privacy-first startup building a persistent personal preference/context layer that AI systems and consumer products plug into. You'd ship end to end — preference models, the consent-based protocol layer, consumer surfaces, and OAuth/MCP connector pipelines — using TypeScript, Next.js, Fastify, Postgres, Redis.
Founding Engineer — Path to CTO
Founding engineer (path to CTO) at Ponce AI, a revenue-generating startup building personalized-aesthetics software with AI facial photo analysis. Owns the full technical stack — TypeScript/React/Node.js apps, Python/GCP backend, OpenCV/MediaPipe ML — working directly with the founder and customers, remote with quarterly in-person sessions.
Principal Systems Engineer: Linux Kernel
Own test and validation infrastructure for Cedana's kernel-level GPU checkpointing system that transparently migrates AI/HPC workloads (works with Kubernetes, SLURM, NVIDIA Dynamo). Deep Linux kernel work: root-cause defects at the kernel/driver boundary, optimize performance with perf/eBPF, and build automated performance and regression harnesses.
Founding Engineer - Electron + Node.js
Founding engineer at a stealth, pre-seed AI startup building an 'invisible, ambient' desktop product. You would architect an Electron + Node.js/TypeScript desktop app with real-time, low-latency local systems, working directly with founders for equity-only compensation until the seed round closes.
Founding Engineer
Founding engineer at Pave AI (Chicago-based, remote-friendly) who independently designs and ships production-grade agentic AI systems for paving contractors — LLM agents, tool-calling, orchestration, evaluations, and full-stack delivery. $60k–$75k plus 1–5% equity, working directly with founders.
Founding Engineer (Systems)
Hands-on founding engineer who builds and automates low-level infrastructure: hardened nftables/Ansible firewall setups, containers, local LLM agent runtimes on bare-metal GPU clusters, PostgreSQL audit ledgers, and WireGuard mesh networking. Pure IC role with no management overhead.
Satellite Systems Engineer (Payload & Spacecraft)
Founding satellite systems engineer at Player One Space who designs, builds, integrates, and flies the company's first 6U/picosat satellites — owning bus selection, payload design (comms/IoT/PNT), subsystem budgets, environmental testing, launch campaign, and on-orbit commissioning. Hands-on across RF, embedded, ADCS, power, and thermal.
Software Engineer
Full-stack engineer at an early-stage mobile security startup, co-owning the flagship Android anti-malware app end to end — building across frontend, backend, and DevOps with an AI-native development workflow and translating malware research into shippable features. Contractor role via Deel, treated as full-time.
Co-Founder & System Engineer
A co-founder-level IT generalist role at early-stage startup Voicera: you run day-to-day IT operations — helpdesk, networking basics, Mac/Windows device management, and SaaS admin (Google Workspace, Slack) — acting as the go-to tech person while working closely with the CTO. Pay is equity-only (1.5%–3.5%) until the funding round closes.
Junior Software Engineer · Null Labs · Remote (US) or Orlando, FL · $45K-$100K + equity
Junior software engineer joining a small startup to build Argus, a fintech product that audits retail suppliers' payment deductions and automates disputes. Day to day: writing Python data pipelines, scrapers and portal automation, Postgres work, tests, and dashboard features, deployed via Docker on AWS.
Co-Founder & Principal Software Engineer
Co-founder & principal engineer at Voicera, an early-stage US startup whose AI product detects sincerity and emotional alignment in voice and video. You define the tech stack, lead and mentor a small remote engineering team, and drive technical strategy — equity-only (4–6%) until the funding round closes.
Intern Software Engineer
Unpaid intern software engineer at Victorise, a startup building software and hardware for competitive athletes in the action sports industry. You'd prototype with upcoming VR/AR hardware and wearables while coding with Unity3D/C#, the MEAN stack, and mobile platforms (Android/iOS), working from San Diego/Carlsbad or remotely.
Software Engineer — Integrations & Platform
Engineer on Pica's integration platform: building and maintaining connectors to 200+ third-party services exposed through a single API aimed at AI agents. Day to day is shipping end-to-end features and integrations in TypeScript/Node.js — third-party APIs, OAuth, webhooks — remotely from India on EST-aligned hours.
Founding Software Engineer
Founding software engineer (equity-only, 1-6% ownership) at an early-stage AI startup building tools that make AI applications robust and reliable for mission-critical use. You'd work directly with the founders on full-stack Python/GCP development, LLM and agent-based systems, and setting engineering practices from zero to one.
Software Engineer, AI Dev Platform (Revenue Share) (US Citizen Only)
Solo engineer role to take Tribal, Tetrel Health's AI-native development and governance platform, from internal tool to commercial multi-tenant SaaS: bug fixes, AWS operations, security/provisioning hardening, deploying customer instances, and go-to-market. No salary — compensation is negotiable revenue share or equity.