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Research Engineer Jobs at AI Startups

There are currently 143 open Research Engineer jobs across 57 AI startups. 38% of these roles are at early-stage (Pre-Seed through Series B) companies. Every listing links straight to the company's official application page.

143Open roles
57Companies hiring
Jun 16, 2026Last updated
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Series G+ 29 (20%)Series A 24 (17%)Series D 20 (14%)Seed 18 (13%)Series C 15 (10%)Series E 13 (9%)Series B 12 (8%)Growth 5 (3%)Debt 4 (3%)Unknown 2 (1%)Pre-Seed 1 (1%)
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Open Research Engineer Roles

RoleCompanyStageLocationPosted
Research EngineerCrosbySeries BNew York CityJun 16, 2026
Research Engineer, RL EngineeringAnthropicSeries G+San Francisco, CAJun 15, 2026
Senior GenAI Research Engineer - Optimization and KernelsDatabricksSeries G+Mountain View, CaliforniaJun 15, 2026
Research Engineer, Core MLTogether AISeries CSan FranciscoJun 15, 2026
Research Engineer, Frontier Speculative DecodingTogether AISeries CSan Francisco, New York CityJun 15, 2026
Systems Research Engineer, GPU ProgrammingTogether AISeries CSan FranciscoJun 15, 2026
Systems Research Engineer Intern - GPU Programming (Fall 2026)Together AISeries CSan FranciscoJun 15, 2026
Research Engineer, Code RL (Reinforcement Learning)AnthropicSeries G+San Francisco, CAJun 11, 2026
Staff Research Engineer - CodeTuringSeries ESan Francisco, California, United StatesJun 11, 2026
Staff Research Engineer - RL GymsTuringSeries ESan Francisco, California, United StatesJun 11, 2026
Research Engineer (Scaling Multimodal Data)World LabsSeries ESan FranciscoJun 11, 2026
Research Engineer / Scientist (3D Reconstruction)World LabsSeries ESan FranciscoJun 11, 2026
Research Engineer / Scientist (3D Tech Lead)World LabsSeries ESan FranciscoJun 11, 2026
Research Engineer / Scientist (SLAM)World LabsSeries ESan FranciscoJun 11, 2026
Research Engineer, Cybersecurity RL (Reinforcement Learning)AnthropicSeries G+San Francisco, CAJun 10, 2026
Research Engineer, Performance RL (Reinforcement Learning)AnthropicSeries G+San Francisco, CAJun 10, 2026
Research EngineerDatology AISeries ARedwood CityJun 4, 2026
Research Engineer, Safeguards LabsAnthropicSeries G+San Francisco, CAJun 3, 2026
Prompting & AI Agent Research EngineerHello PatientSeries AUS RemoteJun 3, 2026
Prompting & AI Agent Research EngineerHello PatientSeries ANew York, NYJun 3, 2026
Prompting & AI Agent Research EngineerHello PatientSeries AAustin, TexasJun 3, 2026
Founding Applied Research EngineerRoxSeries BSan FranciscoMay 28, 2026
Research Engineer, Knowledge FoundationsAnthropicSeries G+San Francisco, CAMay 26, 2026
Machine Learning Systems Research Engineer, Agent Post-training - Enterprise GenAIScale AISeries G+San Francisco, CAMay 26, 2026
Principal Research EngineerSynthesiaSeries EEuropeMay 22, 2026
Research Engineer, Economic Research Data PlatformAnthropicSeries G+San Francisco, CAMay 20, 2026
Senior Research EngineerMem0Series ASan Francisco Bay AreaMay 20, 2026
Senior Research Engineer, Voice + SpeechDecagonSeries DSan FranciscoMay 18, 2026
Staff Research Engineer, Voice + SpeechDecagonSeries DNew York CityMay 18, 2026
Senior Research Engineer, Voice + SpeechDecagonSeries DNew York CityMay 18, 2026
Senior Research EngineerNetradyneSeries DBangaloreMay 18, 2026
Data Research EngineerFundamentalSeries ABarcelonaMay 14, 2026
Research EngineerGraphon AISeedSan FranciscoMay 14, 2026
Research Engineer, Frontier CapabilitiesLila SciencesSeries ACambridge, MA USAMay 14, 2026
Senior / Engineer II, AI Lab Research EngineerLila SciencesSeries ACambridge, MA USAMay 14, 2026
Staff / Principal Research Engineer, AI Safety, Technical MitigationsLila SciencesSeries ACambridge, MA USAMay 14, 2026
Research Engineer – EvalsFirecrawlSeries ASan Francisco, CA (Hybrid) OR Remote (Americas, UTC-3 to UTC-10)May 13, 2026
Research Engineer, Tinker, Developer ExperienceThinking Machines LabSeedSan FranciscoMay 13, 2026
Research Engineer, VoiceInflection AIGrowthPalo Alto, California, United StatesMay 12, 2026
Research Engineer, Knowledge TeamAnthropicSeries G+Remote (Friendly (Travel-Required))May 6, 2026
Research Engineer, AgentsDecagonSeries DNew York CityMay 5, 2026
Research Engineer, AgentsDecagonSeries DSan FranciscoMay 5, 2026
Research Engineer - DataPeriodic LabsSeedMenlo ParkMay 5, 2026
Research Engineer, Infrastructure, InferenceThinking Machines LabSeedSan FranciscoMay 4, 2026
Research Engineer, Infrastructure, KernelsThinking Machines LabSeedSan FranciscoMay 4, 2026
Research Engineer, Infrastructure, NumericsThinking Machines LabSeedSan FranciscoMay 4, 2026
Research Engineer, Infrastructure, RL SystemsThinking Machines LabSeedSan FranciscoMay 4, 2026
Research Engineer, Infrastructure, Training SystemsThinking Machines LabSeedSan FranciscoMay 4, 2026
Research EngineerSesame AISeries BSan FranciscoMay 1, 2026
Research Engineer, Multimodal DataEventual ComputingSeries ASan FranciscoApr 29, 2026
View all 143 Research Engineer jobs
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FAQ

How many Research Engineer jobs are open at AI startups?

There are currently 143 open Research Engineer jobs across 57 AI startups on Fast AI Jobs.

What funding stages are hiring Research Engineers?

38% of open Research Engineer roles are at early-stage (Pre-Seed through Series B) startups, with the remainder at later-stage and growth companies.

How often is this Research Engineer list updated?

Listings are refreshed daily from official company career pages and deduplicated by posting. Every link points to the original application page.