2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Software Engineer Intern (PHP/ API)
A 3-month, full-time remote internship (unpaid, equity-based) at TEAMCAL AI, an early-stage ~5-person startup. You'll ship code daily on a real-world web app — building features, fixing bugs, and doing QA/testing — using PHP, MySQL, CodeIgniter, JavaScript, HTML, CSS, and Bootstrap, with daily supervision from a technical director.
Founding Software Engineer — Fynliq | Equity-Only, Early Stage
Founding software engineer at Fynliq, an early-stage startup helping college students navigate FAFSA, financial aid, and college costs. You'll build and ship the MVP end to end with the founder — web/mobile app, backend APIs, databases, auth, and analytics. Equity-only, no cash salary.
C++ Software Engineer - Remote Desktop Software
Build ultra-low-latency (10-40ms, 144+ FPS) remote desktop streaming software in modern C++ at Softdrive, a Toronto startup making enterprise-grade virtual desktops. Day-to-day work spans UDP networking, video/audio encoding, GPU/CPU optimization, and cross-platform systems programming.
Software Engineer, Computer Vision
Senior computer vision engineer at Trace, an early-stage startup building training-data infrastructure for physical AI/robotics. Day to day you own the spatial perception layer of their data pipeline: camera/multi-sensor calibration, SLAM/VIO localization and mapping, pose estimation, and benchmarking to turn real-world sensor captures into reliable robotics training data.
Sr. Software Engineer, Product
Senior product engineer at Enurgen (utility-scale solar analytics) building customer-facing dashboards, workflows, and big-data visualizations on fleet-scale time-series telemetry backed by ClickHouse, plus loss-detection and real-time operations features. React front end, Node/Python backend.
Software Engineer
Build and scale an AI Career Companion using Node.js, TypeScript, and React. You will design backend APIs, develop frontend features, and integrate AI workflows to help users optimize their careers in a fast-paced startup environment.
Software Engineer
Full-stack software engineer at Ewith.me, an AI-powered learning and productivity platform for students. You'll ship features end-to-end across frontend, backend, APIs, and databases, including AI-powered learning tools, with high ownership from planning through deployment.
Senior Software Engineer, Lead (Remote)
Marco Experiences is hiring a senior full-stack engineering lead to partner with its CTO and Head of Design, owning consumer products end-to-end for its corporate experiences marketplace (600+ companies, 60,000+ employees). Core stack: TypeScript/Node.js, React, and SQL, with autonomy and fast execution emphasized.
Junior Software Engineer
OpenxAI, a decentralized AI network built on Web3 technologies, is hiring a remote junior software engineer (Australia-based) to build backend and frontend features, APIs, and smart-contract integrations for its decentralized AI platform. Key stack includes Python, JavaScript, React, Node.js, and Git, with exposure to AI tools like TensorFlow and PyTorch.
Senior Software Engineer
Senior Software Engineer at Medsender, a healthcare AI startup automating medical documents and EHR workflows. You'll own core systems end to end—designing resilient backend services, integrating LLMs responsibly, and syncing data with EHRs—primarily in Python, Ruby, JavaScript, and Go on GCP/Kubernetes.
Founding Software Engineer
Founding full-stack engineer at an early-stage climate-tech startup building a sustainability/LCA analytics platform for the fashion industry. Works directly with the CTO on AI/ML-driven backend and APIs, LCA engine expansion, ERP/PLM integrations, and a React/Next.js front end using databases like MongoDB and PostgreSQL.
Software Engineer
Fullstack engineer at Take2 AI, an AI-agent platform for healthcare recruiting — you'll ship product workflows end-to-end (DB → API → UI), evolve the design system, and architect for scale as the platform grows from thousands to millions of candidate interactions. Stack: TypeScript, React, Node.js, Postgres/MySQL. NYC hybrid, in-office Mon–Thu.
Senior Software Engineer
Senior Software Engineer at Take2 AI, a startup whose AI agents automate healthcare recruiting. You'll lead and scale the backend/infrastructure behind high-volume AI agent products, contribute full-stack (Node.js, Python, React, AWS/EKS/Kubernetes), and mentor engineers. NYC-based hybrid (Mon–Thu in office); $140k–$180k plus equity.
Software Engineer
Indihood is hiring software engineers (remote/location-independent, Bengaluru listed) to build open, large-scale platform software alongside ex-Google engineers. The role centers on strong CS fundamentals, distributed systems (NoSQL, graph DBs, Hadoop/MapReduce), and machine learning, paying ₹18L–₹60L with a 2+ years experience minimum.
Software Engineer, Infra
Numeral, an AI-native tax automation platform, is hiring a foundational Infrastructure Software Engineer in San Francisco to design and build core infrastructure, lead architecture decisions, and improve reliability, observability, and scalability using Node.js, PostgreSQL, Redis, AWS, and container orchestration.
Software Engineer, Product
Foundational full-stack/backend engineer at Numeral, an AI-native tax automation startup, designing and building scalable APIs, distributed services, and infrastructure from scratch. Core stack includes Node.js, PostgreSQL, Redis, and AWS, with a focus on architecture, observability, and backend engineering culture.
Software Engineer, AI
Numeral, an AI-native tax automation platform for digital businesses, is hiring a Foundational AI Engineer in New York to design and run production LLM systems — tool-calling agents, model orchestration, RAG — plus the backend services and APIs (PostgreSQL, Redis, AWS, TypeScript) that power automated tax workflows.