2,918 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Software Engineer
Software Engineer at AsaanPay, an early-stage Pakistani payments startup building payments and AI infrastructure for unbanked merchants. You'll ship production features end to end, talk to merchants, and work with Python, Node.js, or Go, REST APIs, and SQL/NoSQL databases, remote within Pakistan.
Software Engineer
Software Engineer at Syntrace, a startup building source-backed conversational knowledge for institutional investors. You'll own features end to end across the stack on an event-sourced, real-time codebase, with strong TypeScript or Python required in a small senior team.
Software Engineer (f/d/m)
Build and operate Entrix's energy Settlement and Revenue platform end-to-end — data ingestion, settlement, invoicing, and revenue reporting — taking projects from design through deployment and on-call. Core stack is Python, strong SQL, and AWS, working office-first in Munich with Operations, Portfolio Management, and Finance.
Senior Python Software Engineer — AI, CI/CD & Web Platform
Builds an internal IT platform supporting nuclear projects at a Paris-based decarbonation startup, working across backend APIs, web frontend, CI/CD and AI features. Core stack is Python with FastAPI on the backend and React on the frontend, with Git-based workflows.
Principal Software Engineer
Principal Software Engineer who owns architecture for Foundation Health's AI operating system for pharmacy: production voice/SMS patient agents, deep Epic/EHR integration, and a platform built to scale 10-100x. Also mentors engineers and leads the company's AI/agentic development practices from a remote-first US team.
Software Engineering Intern (Device Team) - Summer 2027
Relay is hiring a paid Summer 2027 software engineering intern for its Device Team in Raleigh, NC, to build software for its custom Android-based smart radios for frontline workers. Interns contribute across the full device stack: Android apps (Kotlin/Java), OS-level and Linux systems programming, and embedded firmware in C/C++/Rust.
Member of Technical Staff, Robotics System Integration
Full-stack systems engineer at XDOF who owns end-to-end embodied-AI data collection: integrating and calibrating cameras and robotic arms, maintaining sensor-synced data pipelines, defining ROS2 interfaces, and deploying imitation-learning models on robots. Core tech: Python/C++, Linux, ROS/ROS2, PyTorch, ZED/RealSense, robot hardware buses.
Software Engineer (New Grad)
New-grad full-stack software engineer at Aurelian (Seattle, on-site) building AI agents for 911 dispatch centers — AVA answers non-emergency calls and CORA assists call-takers. With no PMs, engineers talk to customers, decide what to build, and ship features across AI call handling, dispatcher tools, and integrations.
Software Engineer - Platform
Platform Engineer at a Series A startup responsible for building backend services and managing AWS infrastructure. The role involves developing APIs in Python and Java, implementing Infrastructure as Code with AWS CDK, managing GitLab CI/CD pipelines, and building AI-driven Claude agents.
Senior Software Engineer - Product Platform
Build and scale foundational fintech systems like identity/KYC and shared infrastructure that power Kikoff’s credit-building products for millions of users.
Founding Engineer, Financial Products
Founding product engineer at Forage, a payments processor for SNAP/EBT, to build new consumer financial products 0-to-1 end-to-end — prototyping frontend experiences and designing the backend services, APIs, and integrations behind them. Full-stack work with React/TypeScript, Python/Django, and AWS in a regulated payments environment.
Staff Software Engineer
Lead a team of engineers to build an AI-native insurance platform using React, TypeScript, Python (Django), Node.js, and PostgreSQL, shaping the future of how insurance operates.
Software Engineer Intern
An 11-week full-time, in-person software engineering internship at Semgrep's San Francisco office, building developer-focused security tools. Interns ship full-stack features in a codebase using Python, PostgreSQL, TypeScript, and React, collaborate via code reviews and demos, and receive 1:1 mentorship at $2,400/week.
Software Engineer, Email
Backend engineer on Doppel's Email security team, building the infrastructure behind an AI-native platform that detects and disrupts phishing, impersonation, and fraud. Day-to-day work spans designing, coding, testing, debugging, and reviewing software to scale the platform.
Software Engineer, Infrastructure
About the Company Models are what they eat. But a large portion of training compute is wasted training on data that are already learned, irrelevant, or even harmful, leading to worse models that cost more to train and…
Senior IT Systems Engineer
Senior IT Systems Engineer who designs, builds, and maintains the on-prem and cloud infrastructure powering a quantum computing company — handling MDM, SSO/IAM (Okta), patching, backups, and support across Ubuntu, macOS, and Windows. On-site in Boulder at least 3 days per week, reporting to the Director of IT.
Senior/Staff Software Engineer, Agentic Applications
Senior/Staff full-stack engineer at Supio building end-to-end products across React/TypeScript frontend and Node.js backend, including productionizing LLM/AI-driven features. Onsite in San Francisco or Seattle; base salary ranges from $180k to $270k depending on level and city.
Mission Systems Engineer
Designs and analyzes space missions for a defense-focused space company: builds simulation tools, runs orbital/rendezvous/constellation analyses and trade studies, and supports system integration and live mission operations. Works in MATLAB, Python, or C++ with tools like STK, FreeFlyer, and GMAT; fully onsite in Colorado or California and requires TS/SCI-clearance eligibility.
Software Engineer, Core Platforms
Entry-to-junior (0-2 yrs) platform engineer at Bot Auto in Houston, TX, building and operating the internal Kubernetes-based platforms, infrastructure-as-code, workflow systems for ML/simulation pipelines, self-hosted LLM automation, and observability tooling that support autonomous truck development.
Founding Engineer
Founding engineer (employee #4) at a YC-backed startup building an AI-powered control layer for industrial robots, starting with welding. You'll work across the full stack — software, robotics, ML, networking — and hands-on install vision sensors, robots and welding gear in an industrial lab near London Bridge, 5 days a week.