Software Engineer jobs at Y Combinator startups

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OneSignal (S11) Engage customers through personalized omni-channel messaging(about 1 month ago)
Senior or Staff Software Engineer, Backend

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

OneSignal (S11) Engage customers through personalized omni-channel messaging(about 1 month ago)
Staff Software Engineer, Fullstack

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

Hive (S14) Marketing automation for event promoters (email, sms, ads, CRM)
Head of Engineering

fulltimeCanada (Remote) / Remote (CA; US)Full stack

Hive (S14) Marketing automation for event promoters (email, sms, ads, CRM)
Senior Backend Engineer

fulltimeCA / Remote (CA)Backend

DevCycle (W14) Feature Flag Management Built for Developers
Full-Stack Engineer

fulltimeToronto / Remote (CA)Full stack

Etleap (W13) Etleap is an ETL solution for creating perfect data pipelines.
Software Engineer - Integrations South America (remote)

fulltimeBR / Remote (BR)Backend

Etleap (W13) Etleap is an ETL solution for creating perfect data pipelines.
DevOps Engineer Latin America (remote)

fulltimeBR / AR / CL / PE / UY / CO / VE / EC / GY / BO / PY / Remote (BR; AR; CL; PE; UY; CO; VE; EC; GY; BO; PY)Devops

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(about 1 month ago)
Thermal Structures Engineer

fulltimeAtlanta, GA, USHardware

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(about 1 month ago)
Avionics Engineer

fulltimeAtlanta, GA, USHardware

AfterQuery (W25) Research lab investigating the boundaries of AI capabilities.
Software Engineer Intern

internSan Francisco, CA, US / Remote (US)Frontend

AfterQuery (W25) Research lab investigating the boundaries of AI capabilities.(2 months ago)
Founding Full Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Olive (W25) Build internal tools for your data with natural language.
Software Engineering Intern

fulltimeSan Francisco, CA / Remote (US)Full stack

Olive (W25) Build internal tools for your data with natural language.
Founding Software Engineer

fulltimeSan Francisco, CAFull stack

ZeroEntropy (W25) High accuracy search API over unstructured data.
Founding AI Engineer

fulltimeSan Francisco, CA, USMachine learning

ZeroEntropy (W25) High accuracy search API over unstructured data.
Summer Intern (2025)

internSan Francisco, CA, USMachine learning

Scout (W25) AI-powered student information system for K-12 schools
Software Engineer

fulltimeNew York, NY, USFull stack

Scout (W25) AI-powered student information system for K-12 schools
Design Engineer

fulltimeNew York, NY, USFrontend

Gander (F24) Automation System for Global Aviation
Founding Engineer (NYC)

fulltimeNew York, NY, USFull stack

vly.ai (F24) Automating the full-stack developer(7 days ago)
Full-Stack + Applied AI Software Engineering Intern

internSan Francisco, CA, USFull stack

Keye (F24) The Smartest Private Equity Investor
Senior Frontend Engineer (Hybrid)

fulltimeNew York, NY, USFrontend

Keye (F24) The Smartest Private Equity Investor
Senior Software Engineer (Hybrid)

fulltimeNew York, NY, USFull stack

Cekura (F24) Testing & Observability for Voice AI agents
Founding AI Engineer, India

fulltimeBengaluru, KA, IN / Bengaluru, Karnataka, INMachine learning

Cekura (F24) Testing & Observability for Voice AI agents(3 days ago)
Founding AI Engineer

fulltimeSan Francisco, CA, USMachine learning

Afternoon.co (F24) Bookkeeping, compliance and tax for founders(15 days ago)
Founding Engineer at Afternoon (F24)

fulltimeNew York, NY, USFull stack

Merlin AI (S24) AI powered ERP for Construction
Founding Backend Engineer

fulltimeIN / Remote (IN)Backend

Merlin AI (S24) AI powered ERP for Construction(about 1 month ago)
Frontend React Developer

fulltimeRemoteFrontend

Usul (S24) Win defense contracts with AI
Cracked Full Stack & AI Engineers Only: Build the future of Defense

fulltimeSan Francisco, CA, USFull stack

Sepal AI (S24) Data Development for Advanced AI(17 days ago)
Fullstack Software Engineer

fulltimeSan Francisco, CA, US / New York, NY, US / Remote (US)Frontend

Helium (S24) Self Improving Software
Full-Stack Web Application Contractor

contractRemoteFull stack

YouShift (W25) Rippling for healthcare.(1 day ago)
Founding engineer

fulltimeES / Remote (ES)Full stack


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