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Series A AI Startup Research Engineer Jobs

There are currently 28 open Research Engineer jobs across 21 Series A AI startups. Every listing links straight to the company's official application page, deduplicated and refreshed daily.

28Open roles
21Companies hiring
Aug 3, 2026Last updated
01

Open Research Engineer Roles at Series A AI Startups

RoleCompanyStageLocationPosted
Staff Research Engineer, Scientific Computing and ML/Physics InfrastructureLila SciencesSeries ACambridge, MA USAAug 3, 2026
Research Engineer - Agent MemoryMem0Series ASan Francisco Bay AreaJul 29, 2026
Research EngineerAntimetalSeries AHQ - NYCJul 28, 2026
Performance Research Engineer (multiple levels)Efficient ComputerSeries ASan Jose, CA OR Pittsburgh, PAJul 22, 2026
Research EngineerSableSeries ASan FranciscoJul 16, 2026
Research EngineerConsoleSeries ASan Francisco (On-site)Jul 14, 2026
Research EngineerFirecrawlSeries ASan Francisco, CA (Hybrid)Jul 12, 2026
Research EngineerGreptileSeries ASan FranciscoJul 10, 2026
Research Engineer/ Applied ScientistWisdomAISeries ASan MateoJul 9, 2026
Research Engineer - Distributed TrainingPrime IntellectSeries ASan FranciscoJul 8, 2026
Research Engineer - Reinforcement LearningPrime IntellectSeries ASan FranciscoJul 8, 2026
Research Engineer - RL InfrastructurePrime IntellectSeries ASan FranciscoJul 8, 2026
Staff+ Forward Deployed Research Engineer – RankingSequenSeries AUnited StatesJul 6, 2026
Forward Deployed Research EngineerComposioSeries AsfJun 17, 2026
Research EngineerDatology AISeries ARedwood CityJun 4, 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, Multimodal DataEventual ComputingSeries ASan FranciscoApr 29, 2026
Research EngineerHedraSeries ASan FranciscoApr 15, 2026
Senior Applied Research EngineerFundamentalSeries ABarcelonaMar 25, 2026
Platform Research EngineerApplied ComputeSeries ASan FranciscoMar 10, 2026
Member of Technical Staff - Research EngineerComposioSeries AsfFeb 10, 2026
Research EngineerBespoke LabsSeries AMountain ViewJan 21, 2026
Research EngineerHeyGenSeries ALos Angeles, Toronto, SingaporeJan 15, 2026
Liquid Labs - Research EngineerLiquid AISeries ABostonDec 3, 2025
Applied Research EngineerApplied ComputeSeries ASan FranciscoOct 29, 2025
Research Engineer/ ScientistDyna RoboticsSeries ARedwood City, CAAug 22, 2025
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FAQ

How many Research Engineer jobs are open at Series A AI startups?

There are currently 28 open Research Engineer jobs across 21 Series A AI startups on Fast AI Jobs.

Why filter Research Engineer jobs by funding stage?

Funding stage signals company size, runway, and equity upside. Filtering to Series A startups narrows the list to Research Engineer roles at companies at a comparable point in their growth.

How often is this list updated?

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