Software Engineer jobs at Y Combinator startups

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SnapMagic (S15) • AI copilot for electronics design(6 days ago)

Director of Software & Product

fulltimeRedwood City, CA, US / Remote (Redwood City, CA, US)Engineering manager

OneSignal (S11) • Engage customers through personalized omni-channel messaging(8 months ago)

Senior Software Engineer, Journeys Team (Fullstack)

fulltimeUnited States (Remote) / Remote (US)Full stack

OneSignal (S11) • Engage customers through personalized omni-channel messaging(5 months ago)

Staff Software Engineer, SMS Team (Fullstack)

fulltimeUnited States (Remote) / Remote (US)Full stack

PicnicHealth (S14) • Empowering Patients for Deep Real World Data(3 days ago)

Product Engineer

fulltimeSan Francisco, Remote / Remote (US)Full stack

CircuitHub (W12) • On-Demand Electronics Manufacturing(6 months ago)

Full-Stack Robotics Engineer

fulltimeDeerfield, MA, US / Remote (US)Full stack

CircuitHub (W12) • On-Demand Electronics Manufacturing(3 months ago)

Operations Research Engineer

fulltimeUK / Remote (US)Full stack

Amplitude (W12) • Digital Analytics Platform(6 days ago)

Senior AI Product Engineer

fulltimeSan Francisco, CAFull stack

Amplitude (W12) • Digital Analytics Platform(2 months ago)

Full-stack AI Engineer II, Assistant

fulltimeSan Francisco, CA, USFull stack

DiligenceSquared (F25) • AI-powered market due diligence for investment decisions

Founding Engineer - Frontend

fulltimeNew York, NY, USFrontend

DiligenceSquared (F25) • AI-powered market due diligence for investment decisions(7 days ago)

Founding Engineer - Backend

fulltimeNew York, NY, USFrontend

Miniswap (F25) • The Marketplace for Complex Hobbies(12 days ago)

Founding Engineer

fulltimeSan Francisco, CA, US / Remote (San Francisco, CA, US)Full stack

Karumi (F25) • The Waymo of Personalized demos(8 days ago)

AI/ML Applied Engineer

fulltimeNew York, NY, US / San Francisco, CA, USMachine learning

Karumi (F25) • The Waymo of Personalized demos(18 days ago)

Product Engineer (Full-Stack)

fulltimeSan Francisco, CA, US / New York, NY, USFull stack

Leadbay (F25) • Discover and qualify SMB leads that couldn't be found before.(3 days ago)

Engineering Intern

internParis, IDF, FR / Paris, Île-de-France, FR / San Francisco, CA, USFull stack

Leadbay (F25) • Discover and qualify SMB leads that couldn't be found before.

Frontend Engineer

fulltimeParis, IDF, FR / Paris, Île-de-France, FR / San Francisco, CA, USFrontend

Flick (F25) • Figma + Cursor, for AI Filmmaking(about 12 hours ago)

Founding Frontend Engineer

fulltimeSunnyvale, CA, US / RemoteFrontend

Structured AI (F25) • AI workforce for Construction Engineering(3 days ago)

Founding Engineer

fulltimeNew York, NY, USFull stack

Fleetline (S25) • Optimizing fleet planning with data driven algorithms

Founding Engineer

fulltimeNew York, NY, USFull stack

Idler (S25) • Reinforcement learning environments.

Problem Design Engineer

fulltimeRemote / Remote (US)Full stack

Idler (S25) • Reinforcement learning environments.

Software Engineer

fulltimeSan FranciscoFull stack

Floot (S25) • The easiest way for non-coders to build apps with AI.(6 days ago)

Founding Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Minimal AI (S25) • AI Agents for E-commerce Customer Support(3 days ago)

Founding Engineer: Backend + AI-Focused Full-Stack Developer (NYC)

fulltimeNew York, NY, USFull stack

Minimal AI (S25) • AI Agents for E-commerce Customer Support(14 days ago)

Founding Engineer: Backend + AI-Focused Full-Stack Developer (Amsterdam)

fulltimeAmsterdam, NH, NL / Amsterdam, North Holland, NLFull stack

mcp-use (S25) • Open-source dev tools and infrastructure for MCP.(14 days ago)

Founding Engineer

fulltimeZürich, ZH, CH / Zürich, Zurich, CH / San Francisco, CA, USFull stack

BootLoop (S25) • Firmware in minutes, not months - rigorously tested on real hardware

Founding Software Engineer

fulltimeSan Francisco, CA, USFull stack

OnDeck AI (S25) • Analyze any footage, without training a model(18 days ago)

Founding Machine Learning Engineer

fulltimeVancouver, BC, CA / Vancouver, British Columbia, CAMachine learning

OnDeck AI (S25) • Analyze any footage, without training a model(3 days ago)

Founding Engineer

fulltimeVancouver, BC, CA / Vancouver, British Columbia, CAFull stack

Verne Robotics (S25) • AI models that teach robots new skills in hours

Robotics Data Infrastructure Engineer

fulltimeSan Francisco, CA, USBackend

AgentMail (S25) • Email Inboxes for AI Agents(23 days ago)

Founding Engineer

fulltimeSan Francisco, CA, USBackend

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