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(5 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(8 days ago)

Software Engineer - Backend

fulltimeSeattle, WABackend

SnapMagic (S15) • AI copilot for electronics design(5 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 Senior Software Engineer | Santa Clara CA - Hybrid

fulltimeSanta Clara, CA, USBackend

HackerRank (S11) • Change the world to value skills over pedigree

Software Development Engineer in Test II

fulltimeSanta Clara, CA, USQA engineer

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)

Staff Software Engineer, Data Systems

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(about 12 hours ago)

Software Engineer

fulltimeSan Francisco, CA, USBackend

Lightberry (F25) • The social brain for robots.(11 days ago)

Robotics Engineer

fulltimeSan Francisco, CA, USRobotics

Lightberry (F25) • The social brain for robots.(1 day ago)

Software Engineer, Voice AI

fulltimeSan Francisco, CA, USFull stack

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

Leadbay (F25) • Discover and qualify SMB leads that couldn't be found before.(3 months ago)

Engineering Intern

internParis, IDF, FR / Paris, Île-de-France, FR / San Francisco, CA, USFull stack

Hypercubic (F25) • AI to maintain and modernize COBOL.(17 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

Idler (S25) • Reinforcement learning environments.

Staff 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.(1 day ago)

Founding Full-Stack Engineer

fulltimeSan Francisco, CA, USFull stack

Socratix AI (S25) • AI coworkers for fraud and risk teams.(5 days ago)

Software Engineering Intern

internMountain View, CA, USFull stack

Socratix AI (S25) • AI coworkers for fraud and risk teams.(27 days ago)

Founding Backend Engineer

fulltimeMountain View, CA, USBackend

Pangolin (S25) • Identity-aware VPN and proxy for remote access to anything, anywhere.(11 days ago)

Founding Engineer Full Stack

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

EffiGov (S25) • The AI OS for Cities(5 days ago)

Mission Software Engineer

fulltimeSan Francisco, CA, USFull stack

EffiGov (S25) • The AI OS for Cities(9 days ago)

Founding Engineer

fulltimeSan Francisco, CA, USFull stack

Verne Robotics (S25) • AI models that teach robots new skills in hours(about 5 hours 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

Senior Infrastructure Engineer

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

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

Founding Engineer

fulltimeSan Francisco, CA, USBackend

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(11 days ago)

Software Engineer, Systems

fulltimeSan Francisco, CA, USEmbedded systems

MorphoAI (X25) • Software tool for designing robots and machines (2 days ago)

Founding Engineer

fulltimeLondon, England, GB / New York, NY, US / San Francisco, CA, USMachine learning

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