Software Engineer jobs at Y Combinator startups

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Mashgin (W15) Self-Checkout using Computer Vision.
Senior Software Engineer, Full-Stack

fulltimePalo Alto, CAFull stack

Mashgin (W15) Self-Checkout using Computer Vision.
Software Engineer, Computer Vision and Deep Learning

fulltimePalo Alto, 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

HackerRank (S11) Change the world to value skills over pedigree
HackerRank (YC S11) | Hiring Engineering Manager | Santa Clara - Hybrid

fulltimeSanta Clara, CA, USEngineering manager

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

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

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

Wefunder (W13) We're Robinhood for pre-IPO startups. Everyone can invest $100.(11 days ago)
Full Stack, Senior Software Engineer

fulltimeSan Francisco, CA, USFull stack

Amplitude (W12) Digital Analytics Platform(20 days ago)
Full-stack AI Engineer II, Assistant

fulltimeSan Francisco, CA, USFull stack

Amplitude (W12) Digital Analytics Platform
Staff Product Engineer, AI Agents

fulltimeSan Francisco, CA, USFull stack

Bolna AI (F25) Voice AI to enable India's next billion
Lead Backend Engineer (India)

fulltimeDL, IN / Delhi, IN / Bengaluru, KA, IN / Bengaluru, Karnataka, IN / Gurugram, HR, IN / Gurugram, Haryana, INBackend

Humoniq (S25) AI-Native BPO for travel & transport
Senior Backend Engineer (Montreal and Toronto)

fulltimeToronto, Ontario, CA / Montreal, QC, CABackend

Humoniq (S25) AI-Native BPO for travel & transport
Senior Backend Engineer (Boulder)

fulltimeBoulder, CO, USBackend

Idler (S25) Scale AI for reinforcement learning environments.
Software Engineer

fulltimeSan FranciscoFull stack

Idler (S25) Scale AI for reinforcement learning environments.
Senior Software Engineer

fulltimeSan FranciscoFull stack

Floot (S25) The easiest way for non-coders to build apps with AI.(22 days ago)
Founding Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Pangolin (S25) Open-source alternative to Cloudflare Tunnels(about 7 hours ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Wafer (S25) Optimized AI Inference. Custom Built for Your Stack.(21 days ago)
Member Of Technical Staff (Summer Intern)

internSan Francisco, CA, USMachine learning

Wafer (S25) Optimized AI Inference. Custom Built for Your Stack.(7 days ago)
Member Of Technical Staff (Winter Intern)

internSan Francisco, CA, USMachine learning

StarSling (X25) Cursor for DevOps(3 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

Sixtyfour (X25) AI Agents for Research(13 days ago)
Founding Engineer — Full-Stack

fulltimeSan Francisco, CA, USFull stack

Sixtyfour (X25) AI Agents for Research(2 months ago)
Founding Engineer — AI Research Agents (Full-Stack)

fulltimeSan Francisco, CA, USFull stack

Tegore (X25) conversational & personalized AI teacher to help with K-12 learning(19 days ago)
Full Stack Developer Intern

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

Claim Health (X25) The first AI revenue platform for post-acute healthcare
Full Stack Engineer

fulltimeNew York, NY, USFull stack

Bloom (X25) Build and share mobile apps in seconds(about 7 hours ago)
AI / Full-Stack Student Internship (Winter or Summer 2026)

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

Bloom (X25) Build and share mobile apps in seconds(11 days ago)
Founding Engineer

fulltimeZürich, ZH, CH / RemoteFull stack

Artifact (W25) An Collaborative, AI-native IDE for Hardware Engineers(6 months ago)
Forward-Deployed Software Engineer

fulltimeNew York, NY, USFull stack

Artifact (W25) An Collaborative, AI-native IDE for Hardware Engineers(6 months ago)
Senior Software Engineer

fulltimeNew York, NY, USFull stack

AfterQuery (W25) Research lab investigating the boundaries of AI capabilities.(4 days ago)
ML Research Intern

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


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