2,917 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Field-Deployed Software Engineering Intern – Fall 2026 / Spring 2027
GITAI is hiring a part-time, field-deployed software engineering intern to support development, integration, and testing of its space robotics and satellite hardware, including regular testing at a desert test site near Los Angeles. The role mixes hands-on hardware bring-up and debugging with software work in robotics, computer vision, or GNC using Python or C++ on Linux.
Software Engineer, Strategic Projects
Build and harden AI-native prototypes into production-grade connectivity tools, using coding agents and Go while collaborating with customers to embed Tailscale’s identity-aware networking.
Software Engineer, Networking (Dataplane)
Software Engineer on Tailscale's Dataplane team builds and maintains the client-side networking software behind Tailscale's mesh VPN — designing connectivity features (clients, subnet routers, exit nodes), optimizing performance across platforms, and debugging escalated customer network issues. Core tech: deep networking (routing, VPNs, NAT traversal) with Go or C/C++/Rust.
Software Engineer, Infrastructure & Performance
Infrastructure & performance engineer at a startup building persistent computers for AI agents: profile and speed up builds, tests, and CI/CD, build internal platforms and delivery tooling (Bessemer, Hollywood), and work with in-office hardware. Systems languages (Go/Rust/C++), Linux debugging, Kubernetes; on-site in San Francisco, $120k-$250k.
Member of Technical Staff
Develops and trains AI models for robotics, including vision-language-action models and reinforcement learning algorithms, to automate supply chain tasks using real-world robot hardware.
Senior Software Engineer - Infrastructure
Probook, a NYC startup building an AI operating system for home services, is hiring its first dedicated Infrastructure Engineer. Day to day: own production infrastructure for real-time AI products and build agent infrastructure (sandboxes, eval harnesses, CI/CD, coding-agent fleets). In-office 5 days/week in Manhattan.
Software Engineer
Early full-stack engineer at Decoda Health, a YC-backed AI-native operating system for elective-care clinics. You own features end-to-end across scheduling, charting, billing/payments, and real-time patient communication, integrating AI agents like ambient scribing and an AI front desk into clinical workflows, using a modern backend, typed frontend, SQL, and cloud infra.
Senior Software Engineer - Ledger
Senior engineer on Alpaca's Ledger team, designing and maintaining the backend ledger system that serves as the source of truth for all account transactions across the brokerage platform. Day-to-day work is building scalable, defect-free backend services, primarily in Go, with protobuf/gRPC, GCP, and PostgreSQL.
Robotics Software Engineer
Senior robotics engineer building the onboard control software for 9 Mothers Defense's autonomous counter-drone interceptors: writing real-time control loops (PID) in Rust/C/C++ on an RTOS, driving actuators over CAN bus, and fusing camera/IMU data on NVIDIA Jetson, plus Python tooling for calibration and CI/CD. Onsite in Austin, TX.
Application Software Engineer
Builds full-stack features for Vibrant Planet's wildfire resilience and utilities applications — decision-support tools showing simulation/optimization results as charts and interactive maps for land managers. Core stack is Elixir, Phoenix LiveView, and PostgreSQL; fully remote US role (PDT/MDT).
Software Engineer
Software engineers at Cyvl build the Python services, cloud data pipelines, APIs and web platform that turn road-sensor data into an infrastructure intelligence product used by 500+ cities. End-to-end feature ownership across backend and web; hiring all levels, on-site in Somerville, MA (remote option from San Francisco).
Staff Software Engineer, Platform Security
Founding platform security engineer designing, building, and operating the security infrastructure behind Decagon's conversational AI platform from its San Francisco office — multi-tenant secure infra, Terraform/GitOps golden paths, secrets management, IAM, alerting, and automated remediation. Core stack: GCP/AWS, Terraform, Kubernetes, Python/Go/TypeScript.
IT Systems Engineer
Gyde, an AI-native insurance brokerage startup, is hiring an IT Systems Engineer (on-site in New York) to own end-user IT for acquired agencies — onboarding, device fleet management via MDM, and identity/access lifecycle across Entra/Okta and Google Workspace/M365 — with a core focus on automating and codifying those workflows using PowerShell/Python.
Member of Technical Staff – Research
General Intuition & Medal — an AI frontier lab training large action models and world models on the world's largest corpus of action-labeled gaming data — is hiring Members of Technical Staff in New York City. MTS staff take on the most important problems across AI research, engineering, and infrastructure based on their strengths.
Software Engineer
HEO, a space-tech startup specializing in satellite imaging (Space Domain Awareness and Non-Earth Imaging), is hiring a full-stack Software Solutions Engineer in Arlington, VA to support US Government programs. Day to day: building Python data pipelines, APIs, and MVPs, productionizing cloud software, and adding features to the HEO Inspect platform, with an ability to obtain a Top Secret clearance
Intermediate Software Engineer - Field Operations
Intermediate engineer on Halter's Field Operations team in Auckland: half hands-on monitoring and triaging cattle collar and tower hardware fleet issues, half building internal tooling, dashboards, and automations to scale support. Stack spans React/React Native frontends and Node.js/Kotlin/Go backends with hardware/IoT integration.
Member of Technical Staff, Agent Infrastructure
Builds the core runtime and infrastructure for Hark’s AI agent platform, focusing on low-latency streaming, tool execution, memory, and orchestration to power production-grade agentic systems.
Member of Technical Staff, Hark Web
Builds the frontend for Hark’s AI agent interfaces across voice, text, and vision, turning model capabilities into fast, intuitive, and trustworthy user experiences.
Member of Technical Staff - Security Research
Runlayer's first security researcher finds and exploits vulnerabilities in MCP servers, AI coding agents, skills/plugins, and OAuth flows, then runs coordinated disclosure and publishes the research. They turn findings into product protections (detections, scanner rules) using Python, TypeScript, or Go tooling.