2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Principal Software Engineer
Principal full-stack AI engineer at a stealth AI-native startup building IT Service and Configuration Management. Day to day: architect LLM/agent reasoning pipelines, RAG and graph-based search, build scalable backend/data infrastructure, and mentor senior engineers. Stack includes Go, Rust, or Python, LLMs, embeddings, and vector databases.
Software Engineer
Software engineer building end-to-end features for Farsight's agentic AI platform that automates workflows for investment banks and private equity firms. Day to day you design and ship complete technical systems in Python on AWS, moving fast on everything from bug fixes to new products while working directly from customer feedback.
Senior Software Engineer
Senior full-stack engineer at Farsight AI, building and shipping features for its agentic AI platform that automates document and workflow work for investment banks and private equity firms. Day to day: owning projects end to end (design, implementation, deployment) in TypeScript/Python on AWS, with an on-site presence in Manhattan 4 days a week.
Senior Software Engineer – Network Observability
Senior Software Engineer building a high-performance network monitoring and observability platform for RDMA, RoCE, InfiniBand, and TCP/IP fabrics powering GPU/AI clusters. Day-to-day work spans backend telemetry services, dashboards, alerting, anomaly detection, and debugging issues across OS, server, RDMA, and network layers using systems languages like C++, Go, Python, or Rust.
Senior Software Engineer – Time Synchronization
Senior engineer leading development of Clockwork's core time-synchronization systems — building low-latency, highly accurate clock sync infrastructure for distributed GPU/AI clusters. Work spans distributed systems, networking, and OS/kernel-level engineering in C++ and Go (NTP/PTP, eBPF).
Lead Software Engineer
Lead Software Engineer for a decentralized (DeFi) trading platform incubated at Wintermute. You lead the engineering team, design front-end/back-end architecture, ship full-stack web3 apps in TypeScript/Python, build EVM smart contracts (Solidity/Foundry), and refine DevOps practices.
Member of Technical Staff - Platform
Platform engineer at Armadin, an early-stage cybersecurity startup building autonomous proactive security models and agents. You'll design, build, and operate core platform services — identity, access management, integrations, extensibility — end to end, in person from the Palo Alto office, with backend work plus Python/TypeScript/React/C++ and AI/LLM exposure.
Senior Software Engineer
Senior Software Engineer at Oklo building data systems, CI/CD pipelines, visualization tools, and physics kernels for advanced fission reactor design and analysis, primarily using Python.
Software Engineer
Develop software tools to model, simulate, and optimize nuclear reactor designs, collaborating with nuclear engineers to advance clean energy tech.
Software Engineer, Identity & Access Management
Staff engineer owning identity & access management for Hadrian's manufacturing API Platform: builds authentication, authorization (SSO, MFA, OIDC/SAML, RBAC/ABAC/ReBAC), and credential automation across AWS/GCP, Kubernetes, and factory-floor systems. Core stack: Go or Python and modern auth protocols.
Software Engineer, Intern (Summer 2027)
Build and optimize high-performance, low-latency trading systems in Python/C++ while collaborating with quants and engineers at a quantitative investment firm.
Senior Wireless Systems Engineer, R&D
Senior Wireless Systems Engineer at satellite IoT startup Hubble Network, splitting time (~75/25) between improving the accuracy of BLE-to-satellite location algorithms and researching a downlink beacon for time/position estimation. Day-to-day work spans signal processing, geolocation modeling, simulation, and hands-on RF validation using MATLAB/Python/C++.
Founding Engineer
Founding full-stack engineer (first engineering hire) at Lygos, a startup building Bitcoin-collateralized lending using Discreet Log Contracts. Day to day you'd build TypeScript/Node.js backend services, oracle and watchtower infrastructure, Bitcoin/DLC and PSBT integration, and optionally contribute to a React Native app.
Wireless Systems Engineer
Hubble Network is hiring a Wireless Systems Engineer to develop and implement algorithms enabling direct-to-satellite connectivity for terrestrial Bluetooth LE devices — covering modeling, system-level design, simulation, and silicon/FPGA bring-up. Core stack includes Matlab/Python/C++, FSK/OFDM/MIMO signal processing, FPGA/HLS tooling, and lab test equipment. Seattle preferred, with a remote opti
Senior Software Engineer
Senior backend/full-stack engineer at Valdyr, a Stockholm-based telecom-tech startup building a platform for MVNOs and eSIM connectivity providers. Day to day: design and build core services in Go on AWS/Kubernetes with gRPC, PostgreSQL event sourcing, and occasional React front-end work, helping scale the platform to millions of users.
Staff Software Engineer
Staff Software Engineer at seed-stage cybersecurity startup Latent Defense (NYC, hybrid 3+ days/week) who owns customer deployments (Kubernetes, Docker), builds and hardens the telemetry platform, and redesigns backend infrastructure as the product scales from MVP to GA. Stack: TypeScript, Python, Postgres; AI coding agents are core to the workflow.
Software Engineering Co-op
A 6-month co-op (Jan–Jun 2027) at AgZen in Somerville, MA: a software engineering student joins a multidisciplinary agtech team building user-facing apps that run directly on retrofitted crop sprayers plus a cloud data portal, working full-stack across embedded/edge devices, cloud services, and web frontends and backends.
Hydraulics System Engineer
Owns the hydraulic and electro-hydraulic actuation that lets Bedrock's autonomy kit steer, brake, and control implements on heavy construction machines like excavators and wheel loaders. Daily work spans reverse-engineering OEM hydraulic circuits, designing retrofit valve/manifold interfaces, component sizing, functional safety analysis, and hands-on bench and field testing.
Electrical Systems Integration Engineer
Designs and integrates the electrical systems — power distribution, wiring harnesses, and high-speed data links (GMSL, Automotive Ethernet, CAN/LIN) — for Bedrock Robotics' autonomous construction machines. Day to day this means CAD routing, EMI/EMC mitigation, managing harness vendors, and hands-on lab/field bring-up and troubleshooting.