2,917 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Software Engineer – AI & Distributed Systems
Founding engineer at an early-stage AI-native supply chain platform: owning architecture end-to-end, building distributed systems and scalable data solutions, and developing AI capabilities like entity resolution and RAG-based product matching while working directly with customers. On-site in San Francisco; Node.js, Python, or TypeScript.
Member of Technical Staff - ML Infra
Build and optimize ML infrastructure powering self-improving AI systems across distributed training/RL, inference serving, and GPU kernels. Day-to-day work involves GPU scheduling, checkpointing, KV-cache and batching optimization, and CUDA/Triton kernel development alongside researchers.
Senior Software Engineer — Distributed Compute / Spark Systems
Build distributed compute systems for enterprise-scale data and AI workloads, optimizing Spark, Trino, Presto, and Flink environments for cost and performance at petabyte/exabyte scale.
Member of Technical Staff
Full-stack engineer at a YC-backed San Francisco startup building Capy, an AI software engineer: you'll ship across React/Electron interfaces, a TypeScript/Effect backend on MySQL/Kubernetes/NATS, the agent loop, and the frontier model-provider layer. Onsite in SF, working by directing fleets of coding agents.
Software Engineer - Market Intelligence
Software engineer at climate-tech company Patch, building its market-intelligence foundation: ingesting and structuring messy climate-market data, exposing it via internal APIs and MCP tools, and creating AI/LLM-powered research workflows used by Climate Strategy, Sales, and Marketing. Core work spans data pipelines, entity resolution, and production AI systems in Python/TypeScript/JavaScript with
Staff Software Engineer in Test, Compiler & Systems Validation
First dedicated SDET hire at Code Metal, building scalable validation, regression, and quality-gate infrastructure for AI-assisted code-generation, transpilation, and software-transformation platforms. Day to day: assess quality gaps, build reproducible test/CI evidence, and diagnose failures across C/C++, Rust, Python, and heterogeneous targets.
Internship - Software Engineering
Summer 2027 software engineering interns at Overland AI work onsite in Seattle, tackling open-ended projects across teams like Mission Autonomy, Perception/ML, Platforms, Behaviors & Planning, and C2 — all supporting autonomous off-road ground vehicle systems. Requires Python, C++, or Rust experience; hourly pay of $28–$40 based on academic level.
Senior Software Engineer - Real Time Systems
Senior engineer at an AI-native expert-research startup who owns the end-to-end real-time voice layer for AI-moderated interviews: WebSocket infrastructure, low-latency audio streaming, speech-to-text, and model orchestration. Core stack is Node/TypeScript, React, WebSockets/WebRTC, ffmpeg and STT providers, working in-person in NYC.
IT Business Systems Engineer
Owns the company's day-to-day business platforms (Google Workspace, Jira/JSM, Confluence, Slack), administering them and building API-driven integrations and automations to eliminate manual handoffs between systems. Partners with Finance, People Ops, Legal, and Engineering, and collaborates with an IAM engineer on SSO and provisioning.
Software Developer Intern
Deale, a Barcelona/New York startup running the leading M&A marketplace for SMEs, is hiring a Software Developer Intern (via internship agreement) to build and maintain the app's frontend and backend. Day to day: shipping new features with React/Next.js and Python, collaborating with product, data and design teams, and working in Agile/Kanban.
Senior Software Engineer
Senior Software Engineer at Sibill, a fintech building a financial operating system for Italian SMEs and accountants (invoicing, payments, treasury, accounting). You'll work end-to-end across the product with Elixir (backend), TypeScript (frontend), and Python (data/AI), full remote from Italy.
Software Engineer
Software Engineer at Sibill, an Italian fintech building a financial operating system for SMEs and accountants (invoicing, payments, treasury, accounting). You'll design, build, and ship end-to-end features across the full development cycle, working mainly with Elixir (backend), TypeScript (frontend), and Python (data/AI), fully remote within Italy.
System Software Engineer, Networking
Designs, builds, and optimizes high-bandwidth lossless networking fabrics (Clos topologies, RDMA/RoCE) connecting Tensordyne's AI inference systems at rack-to-cluster scale, working hands-on across the full stack from userspace control planes and Linux kernel drivers to switch ASIC SDKs and firmware. On-site in Sunnyvale, CA.
Senior IT Engineer
First onsite IT & Security Operations hire at Manifest OS in NYC: owns internal IT (onboarding/offboarding, devices, SaaS admin like Google Workspace/Slack/GitHub, IAM) while acting as the first line of security defense — triaging alerts, handling phishing response, and deploying VPN/Zero Trust. Reports to the Head of Engineering.
Member of Technical Staff Intern - US
Dryft is hiring a Full-Stack Engineering Intern to build agent-based systems that automate decisions for large manufacturers, shipping features end-to-end across the LLM pipeline, backend, and frontend. Stack: TypeScript/React frontend; Python/FastAPI backend with Postgres, pgvector, Temporal, and Dagster; AI tooling like Pydantic AI and Langfuse.
Member of Technical Staff - US
Founding full-stack engineer at Dryft, an AI startup whose models automate complex decisions in manufacturing operations. You'd own features end-to-end — LLM agent pipelines, backend, and frontend — building the orchestration and guardrails behind agents that run critical processes for large industrial manufacturers. Onsite in San Francisco or Munich.
Convexity - Founding Engineer (Relocation to San Francisco)
Founding engineer for Convexity, an AI-powered inventory/operations platform for distributors and manufacturers. You relocate from Argentina to San Francisco to work in person with the founders, owning architecture and staying hands-on across the full stack: frontend, backend, data, infrastructure, and AI (Python, React, TypeScript).
Senior Software Engineer
Senior Software Engineer at Foundation Health, an AI operating system for specialty pharmacy. You'll take features from loose requirements to production — data models, APIs, LLM layers, rollout and monitoring — including prior auth logic, Epic workflows and AI agents that talk to patients. Hybrid, 3 days/week in downtown Orlando.
Software Engineer
Early-stage startup Foundation Health, an AI operating system for specialty pharmacy, is hiring a Software Engineer to ship features end to end — prior auth workflows, Epic integrations, and AI agents handling patient calls/texts. AI-native building with tools like Claude and Cursor; hybrid role, 3 days/week in downtown Orlando.
Senior Software Engineer, Data - AI Portal
Senior Software Engineer on Wayve's Data Transfer Hub in London, building petabyte-scale distributed pipelines that move video/LiDAR sensor data from global partners (Uber, Stellantis, Nissan) using Python, Terraform, Flyte, Kafka and Azure, to enable AI driver training at scale. Hybrid role based in the London office.