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.
Create Profile ›
EngineeringDesignRecruitingScienceProductOperationsSalesMarketingLegalFinance
OneSignal (S11) Engage customers through personalized omni-channel messaging(3 months ago)
Staff Software Engineer, SMS Team (Fullstack)

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

OneSignal (S11) Engage customers through personalized omni-channel messaging(6 months ago)
Senior Software Engineer, Journeys Team (Fullstack)

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

HackerRank (S11) Change the world to value skills over pedigree
Web Design Engineer

fulltimeHybrid in Santa Clara, CAFull stack

HackerRank (S11) Change the world to value skills over pedigree
HackerRank (YC S11) is Hiring a Software Development Engineer

fulltimeSanta Clara, CA, USBackend

Tenjin (S14) Mobile marketing analytics and infrastructure
Senior Mobile SDK Engineer

fulltimeSan Francisco / Remote (US; CA; MX; CO; AR; BR; PE)Full stack

Tenjin (S14) Mobile marketing analytics and infrastructure
Senior Full-Stack Ruby on Rails Engineer

fulltimeUS / CA / MX / BR / AR / CO / PE / Remote (US; CA; MX; BR; AR; CO; PE)Full stack

Wefunder (W13) We're Robinhood for pre-IPO startups. Everyone can invest $100.(13 days ago)
Full Stack, Senior Software Engineer

fulltimeSan Francisco, CA, USFull stack

CircuitHub (W12) On-Demand Electronics Manufacturing
Computer Vision Engineer

fulltimeUK / Remote (US)Full stack

CircuitHub (W12) On-Demand Electronics Manufacturing
Full-Stack Robotics Engineer Summer 2026 Intern

fulltimeSouth Deerfield, MassachusettsFull stack

Amplitude (W12) Digital Analytics Platform(18 days ago)
Senior Product Engineer, AI Agents

fulltimeSan Francisco, CA, USFull stack

Amplitude (W12) Digital Analytics Platform(4 days ago)
Full-stack AI Engineer II, Assistant

fulltimeSan Francisco, CA, USFull stack

RealRoots (S25) AI social app for female transplants(26 days ago)
Software Engineer, Full-Stack

fulltimeSan Francisco, CA, USFull stack

burnt (S25) Agentic Operating System for Food Supply Chain(5 days ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Hera (S25) AI Motion Designer(about 10 hours ago)
Founding AI Engineer

fulltimeBerlin, BE, DE / Berlin, Berlin, DEMachine learning

Hera (S25) AI Motion Designer(about 6 hours ago)
Founding Software Engineer

fulltimeBerlin, BE, DE / Berlin, Berlin, DEFull stack

Humoniq (S25) AI-Native BPO for travel & transport
Senior Backend Engineer (GDS Experience Required)

fulltimeBoulder, CO, US / Mission Viejo, CA, US / New York, NY, US / Remote (US)Backend

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

AgentHub (S25) The simulation and evaluation engine for AI agents(9 days ago)
Research Engineer Intern

internSan Francisco, CA, USMachine learning

AgentHub (S25) The simulation and evaluation engine for AI agents(6 days ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Herdora (S25) Fast AI Inference(1 day ago)
Member of Technical Staff

fulltimeSan Francisco, CA, USMachine learning

Herdora (S25) Fast AI Inference(3 days ago)
Member Of Technical Staff (Winter Intern)

internSan Francisco, CA, USMachine learning

truthsystems (S25) Automatically blocking risky behavior with real-time governance agents(3 days ago)
Founding Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

StarSling (X25) Cursor for DevOps(2 months ago)
Founding Software Engineer (Full-Stack)

fulltimeSan Francisco, CA, US / San Mateo, CA, US / Palo Alto, CA, US / Menlo Park, CA, US / Redwood City, CA, USFull stack

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

fulltimeSan Francisco, CA, US / San Mateo, CA, US / Palo Alto, CA, US / Menlo Park, CA, US / Redwood City, CA, USFull stack

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

fulltimeIN / Remote (IN)Backend

Tegore (X25) conversational & personalized AI teacher to help with K-12 learning(3 days ago)
Full Stack Developer Intern

contractSan Francisco, CA, US / Remote (US)Full stack

Bloom (X25) Build and share mobile apps in seconds(14 days ago)
Founding Mobile Engineer

fulltimeZürich, ZH, CH / Zürich, Zurich, CH / Remote (US)iOS

Bloom (X25) Build and share mobile apps in seconds(3 days ago)
AI / Full-Stack Student Internship (Winter or Summer 2026)

internZürich, ZH, CH / Remote (US)Full stack

Artifact (W25) An Collaborative, AI-native IDE for Hardware Engineers(5 months ago)
Senior Software Engineer

fulltimeNew York, NY, USFull stack

Artifact (W25) An Collaborative, AI-native IDE for Hardware Engineers(5 months ago)
Software Engineer

fulltimeNew York, NY, USFull stack


Sign up to see more ›