Software Engineer jobs at Y Combinator startups

Find open roles and connect with founders and hiring teams of over 1,000 vetted, funded Y Combinator startups. And create one application to apply to hundreds of roles at YC companies.
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OneSignal (S11) Engage customers through personalized omni-channel messaging(2 months ago)
Staff Software Engineer, SMS Team (Fullstack)

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

OneSignal (S11) Engage customers through personalized omni-channel messaging(2 months ago)
Senior Software Engineer, Journeys Team (Backend)

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

Qventus (W15) We automate operations for hospitals and health systems
Solutions Architect, Conversational AI & Prompt Engineering

fulltimeRemote, United States / Remote (US; CA)Full stack

PicnicHealth (S14) Empowering Patients for Deep Real World Data
AI Engineer

fulltimeSan Francisco, Remote / Remote (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.
Software Engineer - Integrations South America (remote)

fulltimeBR / Remote (BR)Backend

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

fulltimeLondon, England, GBBackend

StarSling (X25) Cursor for DevOps
Software Engineer (Full-Stack)

fulltimeSan Francisco, CA, USFull stack

StarSling (X25) Cursor for DevOps(9 days ago)
Founding Software Engineer (Full-Stack)

fulltimeSan Francisco, CA, USFull stack

MorphoAI (X25) Software tool for designing robots and machines (about 2 months ago)
Founding Engineer

fulltimeLondon, England, GBMachine learning

Vassar Robotics (X25) Ultra-affordable robots that are practical and accessible today.
Hardware Engineer

fulltimeSan Francisco, CA, USHardware

Third Chair (X25) Agents for in-house legal teams
Software Engineer (Frontend)

fulltimeIN / Remote (IN)Frontend

Third Chair (X25) Agents for in-house legal teams
Senior Software Engineer (Backend)

fulltimeIN / Remote (IN)Backend

Combinely (X25) AI coworker for accountants
Founding AI Engineer

fulltimeSan Francisco, CA, USFull stack

Combinely (X25) AI coworker for accountants
Founding Engineer (Full-stack)

fulltimeSan Francisco, CA, USFull stack

QFEX (X25) 24/7 Global Stock Exchange(10 days ago)
Founding Backend Engineer

fulltimeLondon, England, GBBackend

Reditus Space (W25) Reusable Satellites for zero-g manufacturing
Structural Engineering Intern

internAtlanta, GA, USMechanical

Reditus Space (W25) Reusable Satellites for zero-g manufacturing
Spacecraft Engineering Intern

internAtlanta, 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.(4 months ago)
Founding Full Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Solidroad (W25) AI agents for sales and support teams, starting with training and QA.(about 1 month ago)
Senior Product Engineer

fulltimeSan Francisco, CA, USFull stack

Solidroad (W25) AI agents for sales and support teams, starting with training and QA.(3 days ago)
Software Engineer

fulltimeSan FranciscoFull stack

Bindwell (W25) Discovering new pesticides with AI
Founding Machine Learning Engineer

fulltimeSan Francisco, CA, USMachine learning

Pickle (W25) We're building a living digital clone for everyone.
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Pickle (W25) We're building a living digital clone for everyone.
Applied AI 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.
Fall Intern (2025)

internSan Francisco, CA, USMachine learning

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

fulltimeSan Francisco, CA, USBackend

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

fulltimeNew York, NY, USFull stack


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