2,917 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Robotics Software Developer
Builds and maintains the software infrastructure behind Civ Robotics' autonomous construction-layout robots: device and mission management, fleet coordination, and cloud connectivity. Core stack is C++ and Python with ROS/ROS 2, Docker containerization, and basic AWS cloud services.
Systems Engineer
On-site Systems Engineer at REGENT (North Kingstown, RI) owning requirements for the Viceroy Seaglider's systems on the Certification team: deriving requirements from regulations and safety analyses, keeping them traceable in tools like Jama/DOORS, authoring verification procedures, and performing FHA/FTA/FMECA analyses across electrical, mechanical, and software teams.
Senior Software Engineer – Data & ML Platform
GoMaterials is hiring a Senior Software Engineer to own the production backend services and internal data/ML platform behind its B2B marketplace for landscaping materials. Day to day, this means operating Azure cloud infrastructure, building ETL/ELT data pipelines and a lakehouse layer, and productionizing ML and operations-research models using Python, SQL, Terraform, and CI/CD.
Software Engineer, AI Systems (Canada)
Build and operate the AI/LLM layer of Haven Safety's enterprise safety-learning platform: multi-step LLM pipelines, agent orchestration, Neo4j graph/vector retrieval, evaluation suites, and production AI ops. A founding-team role at a pre-seed VC-backed startup requiring strong Python and production ownership.
Senior Software Engineer, Developer Platform
Senior Software Engineer on Zip's Developer Platform team in Toronto builds internal tooling — CI pipelines, testing frameworks, and deploy/release processes (canaries, traffic replay) — so hundreds of engineers can ship enterprise procurement software with high velocity, while driving adoption of AI-assisted development tools. Core stack includes GitHub, GitLab, Buildkite, Jenkins, and Docker.
Senior Software Engineer – Core Team
Senior backend engineer building AI infrastructure to route, orchestrate, and govern production agentic systems across multiple models and tools.
Senior Software Engineer, AI Research
Owns kAIgentic's enterprise 'intelligence layer': designing knowledge-graph ontologies, grounded extraction pipelines, and production RAG systems, plus model fine-tuning (SFT/DPO/RFT) and RL environments to turn institutional knowledge into governed, hallucination-free AI operations. Hands-on with Python and PyTorch in Bengaluru.
Rhombus Research: Software Engineering Intern
Summer 2027 intern at Rhombus Research will design, build, and test a public API for Reptile, a browser-based simulation engine for autonomous fleet coordination — writing endpoints and data contracts, a test suite, reference examples, and developer docs. Requires React and TypeScript; remote with occasional in-person work in San Antonio.
Software Engineer
Full-stack software engineer at Rubie, an early-stage startup building agentic automation to configure and launch ERPs, CRMs, and systems-of-record for customers. You'll work across the entire stack (React, Tailwind, TypeScript, Remix, AWS, Cloudflare), join customer conversations, and shape product decisions while working in-person in NYC.
Software Engineer, Applications
Kovari is hiring a full-stack software engineer in San Francisco (in-person) to build the product layer connecting its robots to businesses: teleoperation and fleet management interfaces, task scheduling/dispatch, customer-system integrations, dashboards, and mobile/web tools, using TypeScript, React, Python, and real-time tech like WebSockets/WebRTC.
Software Engineer, Systems
Systems software engineer owning the software foundation for Kovari's robots — onboard runtime, drivers, networking, OTA updates, and fleet reliability. Core stack is C++/Rust and Python on embedded/real-time Linux with ROS 2. Onsite in San Francisco.
Python Developer
A 6-month onsite contract building an AI-powered consumer healthcare platform at an early-stage healthtech startup. The engineer works full-stack with Python at the core — APIs, async data pipelines, databases, integrations and infra — while contributing to React and React Native apps alongside the CTO, product, design and clinical teams.
Founding Engineer
Founding engineer (engineering hire #2) at Fernstone, a YC-backed startup combining AI with expert advisors to place insurance faster. You'll own systems across the full stack — frontend, application logic, data model, and infrastructure — and build practical LLM-driven workflows, working in-person at the NYC office.
Software Engineering Intern
Terranova, a climate-robotics startup that builds systems to restore wetlands and protect infrastructure from floods, is hiring a Spring 2027 software engineering intern in Berkeley. The intern builds full-stack apps (Vue/Nuxt/TypeScript frontends, NestJS/Rust/Go backends) and owns cloud infra with Postgres/TimescaleDB, CI/CD, and observability tooling, working part-time on-site for $25-35/hr.
Machine Controls & Data Integration System Engineer, Additive Manufacturing
Owns the machine connectivity and data integration layer for Hadrian's additive manufacturing fleet — building telemetry pipelines, canonical data schemas, and machine state models, and integrating OEM/PLC controls. Day-to-day is hands-on with OPC-UA, MQTT, Siemens S7/TIA Portal, Python, and SQL/time-series storage, on site in Torrance, CA.
Software Engineer, Energy Management
Builds and owns the facility-side energy control systems for Fluidstack's gigawatt-scale AI data centers: the protocol layer, gateway services, real-time load/state messaging, and production observability. Stack centers on Go, NATS, Redis, time-series stores like ClickHouse, and Prometheus/Grafana.
Software Engineer Security - Remote US (USA)
First dedicated security hire at a seed-stage, stealth-mode identity/access-management startup. You own the security posture end to end — building secrets management, PKI, audit logging, detection/response, and SOC 2/ISO 27001 compliance — embedded with engineers writing Go on GCP/Kubernetes, with a path to lead the security team.
Senior Software Engineer
Senior Software Engineer at The Electric Plant Co. will own the backend platform (Golang, Postgres, GCP) that turns IoT plant-sensor data and the company's foundation model into a usable product — APIs, cloud infrastructure, dashboards, reliability — working in person in San Francisco alongside scientists and hardware engineers, and championing AI-assisted development across the team.
Software Engineer
Software engineer at Midpage, a legal search/data startup, building the largest US case-law dataset: pipelines that enrich court decisions with metadata, hundreds of reliable web scrapers, citation-resolution utilities, and APIs/MCPs over the data. Core stack is Python and SQL (PostgreSQL, ElasticSearch, GCP, Prefect); role is in-person in SoHo, NYC.