Software Engineer jobs at Y Combinator startups

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

fulltimeRedwood City, CA, USBackend

OneSignal (S11) Engage customers through personalized omni-channel messaging(13 days ago)
Senior or Staff Software Engineer, Backend

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

OneSignal (S11) Engage customers through personalized omni-channel messaging(8 days ago)
Staff Software Engineer, Fullstack

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

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

fulltimeCA / Remote (CA)Full stack

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

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

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

Amplitude (W12) Digital Analytics Platform
Senior Mobile Engineer

fulltimeSan Francisco, CA, US / Vancouver, BC, CA / Vancouver, British Columbia, CAiOS

Amplitude (W12) Digital Analytics Platform
Staff AI Product Engineer

fulltimeSan Francisco, CA, USFull stack

Tally (W25) AI accounting
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Tally (W25) AI accounting
Applied AI Engineer

fulltimeSan Francisco, CA, USBackend

Dalus (W25) AI-Powered Hardware System Design Software
Software Engineering Internship

internSan Francisco, CA, USFull stack

Dalus (W25) AI-Powered Hardware System Design Software(27 days ago)
Founding Software Engineer #1

fulltimeSan Francisco, CA, USFull stack

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(10 days ago)
Lead Avionics Engineer

fulltimeAtlanta, GA, USEmbedded systems

Reditus Space (W25) Reusable Satellites for zero-g manufacturing(11 days 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.
ML Research Intern

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

FuseAI (W25) AI Agents to Kill Salesforce.
Senior Software Engineer

fulltimeSan Francisco, CA, US / Remote (IN; BR; AR)Full stack

Karsa (W25) Stablecoin neobank for emerging markets
Founding Engineer (Frontend)

fulltimeNew York, NY, US / San Francisco, CA, USFrontend

Karsa (W25) Stablecoin neobank for emerging markets
Founding Engineer (Backend)

fulltimeNew York, NY, US / San Francisco, CA, USBackend

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.
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

Weave (W25) AI to measure engineering work
Founding Product Engineer

fulltimeSan Francisco, CA, US / Oakland, CA, USFull stack

Weave (W25) AI to measure engineering work
Founding AI Engineer

fulltimeOakland, CA, US / San Francisco, CA, USMachine learning

Bild AI (W25) AI that understands construction blueprints(20 days ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Gander (F24) Automation System for Global Aviation
Software Engineering Intern

internNew York, NY, USFull stack

Gander (F24) Automation System for Global Aviation(33 minutes ago)
Founding Engineer

fulltimeNew York, NY, USFull stack


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