2,918 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Chief Technology Officer
ActAI, an early-stage company building AI-native, agent-first mobile communication apps, is hiring a CTO to own technology strategy, architecture, and engineering standards across the group — reviewing code, systems, and incidents hands-on while recruiting senior engineers. Core areas: backend systems, APIs, databases, cloud infrastructure, distributed systems.
Senior Ground Systems Engineer (m/f/d)
Senior Ground Systems Engineer at Rocket Factory Augsburg designs, develops, and commissions ground support infrastructure (fluid, mechanical, and process systems) for rocket test and launch facilities, owning systems from concept through operations. Core work involves pressure/fluid engineering, P&IDs, safety analyses (HAZOP/FMEA), and 3D CAD in Siemens NX.
Systems Engineer (m/f/d)
Systems Engineer at Rocket Factory Augsburg (RFA) who develops and maintains requirements, architecture, and verification/test cases for expendable and reusable launch vehicles and ground systems, coordinating across vehicle, propulsion, software, avionics, and ground teams. Core skills include systems engineering, Python tooling, and requirements/risk analysis (FMECA/FTA).
Lead Software Engineer, AI Email App
Lead Software Engineer for an AI-native email app, owning architecture across backend, mobile, and desktop while leading a small senior engineering team to turn AI/LLM capabilities into reliable, shippable product experiences.
Principal Software Engineer, AI Email App
The Principal Software Engineer will lead a team to build a reliable, AI-native email application by designing backend and client-side architectures that integrate LLM capabilities. This hands-on role involves managing complex workflows, ensuring system reliability, and partnering with ML leadership to deliver a high-quality product.
Staff Software Engineer, AI Email App
Staff engineer owning the engineering layer for an AI-native email/app product, designing reliable backend systems, APIs, and client apps that integrate with ML/LLM capabilities while leading a small senior team.
Software Engineer, Desktop
Owns ActAI's desktop applications for its AI-native productivity product, building and maintaining cross-platform Electron apps with real-time collaboration UIs, native desktop integrations, and AI features via backend APIs. Core stack: Electron, Node.js, TypeScript, React, local storage (SQLite/IndexedDB), and WebSockets, with a focus on performance and reliability.
Robotics Software Engineer - Counter-Drone Systems (m/f/d)
Robotics software engineer building the core autonomy for counter-drone and defense robotic systems in Munich: designing real-time C++/ROS 2 software components, working with multi-modal sensor data, and developing perception, estimation, planning, and control algorithms that are validated in real-world field tests on actual hardware.
Senior Software Engineer, Infrastructure (Arlington, VA)
Senior infrastructure software engineer at a recently funded, growing tech company (hybrid in Arlington, VA): building platform services, APIs, AWS/Kubernetes infrastructure, Terraform IaC, and CI/CD from the ground up. Requires 8+ years of experience and US citizenship with clearance eligibility.
Software Engineer, AI Platform (Palo Alto, CA)
Software engineer at an AI-native cybersecurity startup (Series B) building products from scratch: Python backend services and orchestration systems plus React/TypeScript frontends, focused on distributed execution and making AI-powered capabilities reliable in production. Onsite in Palo Alto 5 days per week.
Robotics Autonomy Software Engineer
Develops autonomy software for underwater drones, including mission planning, mapping, and anomaly detection using C++, Python, ROS, and deep learning in a Linux environment.
Software Engineer, Core Product (Contract)
Founding contract engineer (one of the first five hires, reporting to the CTO) at Alpaca Health, an operating system for autism-care practices. You build full-stack, systems-leaning automation — payroll/billing reconciliation, workflow tooling, and reliable LLM-powered features — replacing manual ops checklists with durable systems.
Engineering Manager
Engineering Manager at Fundment, a UK wealth-management platform, leading a small product engineering pod — about 70% hands-on building scalable Python backend systems (FastAPI, SQLAlchemy) on GCP with MySQL/PostgreSQL/Redis, plus mentoring, technical direction, and delivery ownership. Hybrid role, 3 days per week in the Fitzrovia (London) office.
Software Engineer, AGI Platform
About JazzX AI: Vision: Enterprises operating on institutional intelligence—governed, self-improving, and scalable beyond individual expertise. JazzX AI is defining the future of enterprise work—by building AI-native…
Robotics Software Engineer
Medior/senior robotics software engineer at Perciv AI in Delft (on-site) building radar-based perception software for autonomous mobile robots and automotive: production C++/Python linked to embedded real-time execution, using ROS2, PyTorch, Docker, and Linux.
Junior Salesforce Developer
Junior Salesforce Developer at Halter (an agritech startup in Auckland) keeps the Salesforce platform healthy — triaging support, fixing bugs across Apex, flows, permissions and integrations — and builds small-to-medium features end to end with senior guidance, working with Sales, RevOps, Finance and Customer Success. Year-one certifications are funded.
ソフトウェアエンジニア (オープンポジション)
Software engineer (open role) at Bloomo Securities, a Tokyo fintech startup whose app automates US stock/ETF investing (portfolio building, rebalancing, dividend reinvestment). You own design through deployment and ops, specializing in backend, frontend, mobile (Flutter), or infrastructure using Ruby on Rails, Go, TypeScript/Next.js, and Google Cloud.