Software Engineer jobs at Y Combinator startups

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SnapMagic (S15) AI copilot for electronics design(2 months ago)
Lead Principal Engineer

fulltimeRedwood City, CA, USBackend

OneSignal (S11) Engage customers through personalized omni-channel messaging(27 days ago)
Staff Software Engineer, Fullstack

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

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

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.
Senior Software Engineer - San Francisco (Onsite)

fulltimeSan Francisco, CA, USBackend

Etleap (W13) Etleap is an ETL solution for creating perfect data pipelines.
Senior Software Engineer

fulltimeLondon, England, GBBackend

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(29 days ago)
Lead Structures Engineer

fulltimeAtlanta, GA, USHardware

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(30 days ago)
Avionics Engineer

fulltimeAtlanta, GA, USHardware

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

fulltimeSan Francisco, CA, USFull stack

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

internSan Francisco, CA, US / Remote (US; CA; GB)Machine learning

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

fulltimeSan Francisco, CAFull stack

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

fulltimeSan Francisco, CA / Remote (US)Full stack

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

internSan Francisco, CA, USMachine learning

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

fulltimeSan 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(3 days ago)
Full-Stack + Applied AI Software Engineering Intern

internSan Francisco, CA, USFull stack

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(2 days ago)
Founding AI Engineer

fulltimeSan Francisco, CA, USMachine learning

Afternoon.co (F24) Bookkeeping, compliance and tax for founders(11 days ago)
Founding Engineer at Afternoon (F24)

fulltimeNew York, NY, USFull stack

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

fulltimeSan Francisco, CA, USFull stack

Usul (S24) Win defense contracts with AI(3 months ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Sepal AI (S24) Data Development for Advanced AI(13 days ago)
Fullstack Software Engineer

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

David AI (S24) Data for audio AI(4 months ago)
Product Engineer

fulltimeSan Francisco, CA, USFull stack

David AI (S24) Data for audio AI
Senior Backend Software Engineer

fulltimeSan Francisco, CA, USBackend

Conductor Quantum (S24) Quantum computers on silicon chips using AI.(12 days ago)
Machine Learning Engineer - Member of Technical Staff

fulltimeSan Francisco, CA, USMachine learning


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