Software Engineer jobs at Y Combinator startups

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Mason (W16) Mason is the fastest way to take smart devices from idea to end user(7 days ago)
Full Stack Software Engineer

fulltimeSeattle, WAFull stack

Mason (W16) Mason is the fastest way to take smart devices from idea to end user(10 days ago)
Software Engineer - Backend

fulltimeSeattle, WABackend

SnapMagic (S15) AI copilot for electronics design(7 days ago)
Director of Software & Product

fulltimeRedwood City, CA, US / Remote (Redwood City, CA, US)Engineering manager

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

fulltimeSanta Clara, CA, USEngineering manager

HackerRank (S11) Change the world to value skills over pedigree
HackerRank (YC S11) | Hiring Senior Software Engineer | Santa Clara CA - Hybrid

fulltimeSanta Clara, CA, USBackend

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

fulltimeCanada (Remote) / Remote (CA)Full stack

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

fulltimeCanada (Remote) / Remote (CA)Full stack

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

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

Clicks (F25) Computer use agents to automate all back-office work(2 days ago)
Software Engineer

fulltimeSan Francisco, CA, USBackend

Lightberry (F25) The social brain for robots.(3 days ago)
Software Engineer, Voice AI

fulltimeSan Francisco, CA, USFull stack

Lightberry (F25) The social brain for robots.(12 days ago)
Robotics Engineer

fulltimeSan Francisco, CA, USRobotics

Leadbay (F25) Discover and qualify SMB leads that couldn't be found before.
Frontend Engineer

fulltimeParis, IDF, FR / Paris, Île-de-France, FR / San Francisco, CA, USFrontend

Leadbay (F25) Discover and qualify SMB leads that couldn't be found before.
Backend Engineer

fulltimeParis, IDF, FR / Paris, Île-de-France, FR / San Francisco, CA, USBackend

Hypercubic (F25) AI to maintain and modernize COBOL.(19 days ago)
Founding Software Engineer

fulltimeSan Francisco, CA, USFull stack

Parrot (F25) TikTok for language learning(about 1 month ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Uplane (F25) Replace marketing agencies with AI(about 2 months ago)
Founding AI Engineer

fulltimeSan Francisco, CA, USData science

Uplane (F25) Replace marketing agencies with AI(25 days ago)
Founding Engineer (Full-Stack)

fulltimeSan Francisco, CA, USFull stack

Nautilus (S25) AI platform to grow and to optimize car washes(about 7 hours ago)
Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Idler (S25) Reinforcement learning environments.
Senior Software Engineer

fulltimeSan FranciscoFull stack

Idler (S25) Reinforcement learning environments.
Software Engineer

fulltimeSan FranciscoFull stack

Floot (S25) The easiest way for non-coders to build apps with AI.(3 days ago)
Founding Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Pangolin (S25) Identity-aware VPN and proxy for remote access to anything, anywhere.(13 days ago)
Founding Engineer Full Stack

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

EffiGov (S25) The AI OS for Cities(11 days ago)
Founding Engineer

fulltimeSan Francisco, CA, USFull stack

EffiGov (S25) The AI OS for Cities(7 days ago)
Mission Software Engineer

fulltimeSan Francisco, CA, USFull stack

Verne Robotics (S25) AI models that teach robots new skills in hours(2 days ago)
Robotics Data Infrastructure Engineer

fulltimeSan Francisco, CA, USBackend

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

fulltimeSan Francisco, CA, USFull stack

AgentMail (S25) Email Inboxes for AI Agents(3 months ago)
Founding Engineer

fulltimeSan Francisco, CA, USBackend

AgentMail (S25) Email Inboxes for AI Agents
Senior Infrastructure Engineer

fulltimeSan Francisco, CA, US / Remote (San Francisco, CA, US)Backend

Parametric (F25) Robots for frontline physical labor — starting with laundry(about 2 months ago)
Senior ML Infrastructure Engineer

fulltimeSan Francisco, CA, USDevops

Parametric (F25) Robots for frontline physical labor — starting with laundry(12 days ago)
Software Engineer, Systems

fulltimeSan Francisco, CA, USEmbedded systems


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