Software Engineer jobs at Y Combinator startups in Seattle
November 2025
Seattle has fast-growing Y Combinator startups that are well funded and hiring for software engineers. Find thousands of jobs and connect directly with founders at Y Combinator.
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Seattle startup jobs added recently
VetRec (S23)AI Scribe for veterinarians. Saving time and improving patient care.VetRec (S23)•AI Scribe for veterinarians. Saving time and improving patient care.Marketing Operations & Events CoordinatorFull-time•Sales•$70K•Seattle, WA, US- VetRec (S23)AI Scribe for veterinarians. Saving time and improving patient care.VetRec (S23)•AI Scribe for veterinarians. Saving time and improving patient care.Field Implementation SpecialistFull-time•Operations•$1•Fort Lauderdale, FL, US / Seattle, WA, US / Remote (US)
Conduit (W23)Air Traffic Control for WarehousesConduit (W23)•Air Traffic Control for WarehousesFounding Account ManagerFull-time•Sales•$90K - $145K•Seattle, WA, US / San Francisco, CA, US
Kabilah (W24)Pioneering Generative AI for NursingKabilah (W24)•Pioneering Generative AI for NursingSoftware EngineerFull-time•Engineering•Full stack•$100K - $150K•New York, NY, US / Seattle, WA, US / San Francisco, CA, US / Remote (US)
Strac (W22)Data Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & EndpointsStrac (W22)•Data Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & Endpoints(about 1 month ago)Account ExecutiveFull-time•Sales•$75K - $150K•Seattle, WA, US / Remote (US)
Moonset Health (F24)AI for Post-Acute Senior Care (Hospice, Home Health, Skilled Nursing…Moonset Health (F24)•AI for Post-Acute Senior Care (Hospice, Home Health, Skilled Nursing…(about 1 month ago)Product Manager / Product DesignerFull-time•Product•$120K - $170K•Seattle, WA, US- Moonset Health (F24)AI for Post-Acute Senior Care (Hospice, Home Health, Skilled Nursing…Moonset Health (F24)•AI for Post-Acute Senior Care (Hospice, Home Health, Skilled Nursing…(2 days ago)Full Stack Software EngineerFull-time•Engineering•Full stack•$120K - $180K•Seattle, WA, US
- Conduit (W23)Air Traffic Control for WarehousesConduit (W23)•Air Traffic Control for WarehousesAccount ExecutiveFull-time•Sales•$100K - $250K•San Francisco, CA, US / Seattle, WA, US / Remote (US)
AiPrise (S22)AI Powered Global Compliance PlatformAiPrise (S22)•AI Powered Global Compliance PlatformFounding Account ExecutiveFull-time•Sales•$80K - $90K•Bellevue, WA, US / San Jose, CA, US / New York, NY, US / Remote (US)
Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(3 days ago)Forward Deployed EngineerFull-time•Engineering•Full stack•$120K - $180K•Seattle- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centersSoftware Engineer - Audio/TelephonyFull-time•Engineering•Full stack•$160K - $200K•Seattle
- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(3 days ago)Software Engineer - Voice AIFull-time•Engineering•Full stack•$140K - $200K•Seattle
Draftwise (S20)Contract and negotiation AI built for lawyersDraftwise (S20)•Contract and negotiation AI built for lawyersCustomer Success Manager (West Coast)Full-time•Operations•$100K - $130K•Los Angeles, CA, US / San Francisco, CA, US / Seattle, WA, US
Gordian Software (W19)Building software to remove friction in travelGordian Software (W19)•Building software to remove friction in travel(3 days ago)OperationsFull-time•Operations•$130K - $160K•Bellevue, WA, US- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(about 2 months ago)Product MarketingFull-time•Marketing•$140K - $200K•Seattle
- Aurelian (S22)Automating non-emergency calls for 911 centers
- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(16 days ago)Chief of StaffFull-time•Operations•Seattle
Quindar (S22)The platform to monitor and automate satellite operationsQuindar (S22)•The platform to monitor and automate satellite operations(26 days ago)Product ManagerFull-time•Product•$140K - $175K•Denver, CO, US / Washington, DC, US / Los Angeles, CA, US / San Francisco, CA, US / Seattle, WA, US- VetRec (S23)AI Scribe for veterinarians. Saving time and improving patient care.VetRec (S23)•AI Scribe for veterinarians. Saving time and improving patient care.Forward Deployed Engineer (NY)Full-time•Engineering•Full stack•$100K - $150K•New York, NY, US / Remote (New York, NY, US)
Casco (X25)Autonomous security testing for AI systemsCasco (X25)•Autonomous security testing for AI systems(29 days ago)Software EngineerFull-time•Engineering•Full stack•$200K•San Francisco, CA, US / Seattle, WA, US / Remote (US)
Silurian (S24)Foundation models to simulate Earth, starting with weather.Silurian (S24)•Foundation models to simulate Earth, starting with weather.(11 days ago)Machine Learning Research Engineer / ScientistFull-time•Engineering•Machine learning•$120K - $250K•Seattle, WA, US- Quindar (S22)The platform to monitor and automate satellite operationsQuindar (S22)•The platform to monitor and automate satellite operationsSoftware Engineering ManagerFull-time•Engineering•Backend•$140K - $200K•Denver, CO, US / Seattle, WA, US / Washington, DC, US / San Francisco, CA, US / Los Angeles, CA, US / Irvine, CA, US / Remote (Denver, CO, US; Seattle, WA, US; Irvine, CA, US; Washington, DC, US)
Feather (S22)Voice AI- VetRec (S23)AI Scribe for veterinarians. Saving time and improving patient care.VetRec (S23)•AI Scribe for veterinarians. Saving time and improving patient care.Forward Deployed Engineer (Seattle)Full-time•Engineering•Full stack•$100K - $150K•Seattle, WA, US
Boundary (W23)The programming language for AIBoundary (W23)•The programming language for AIEngineers that enjoy hard things (like compilers)Full-time•Engineering•Full stack•$100K - $180K•Seattle, WA, US- AiPrise (S22)AI Powered Global Compliance PlatformAiPrise (S22)•AI Powered Global Compliance PlatformPartnerships LeadFull-time•Sales•$100K - $120K•Seattle, WA, US / San Jose, CA, US / Portland, OR, US / New York, NY, US / Remote (US)
Stoke Space (W21)We’re on a mission, and it starts with 100% reusable rockets.Stoke Space (W21)•We’re on a mission, and it starts with 100% reusable rockets.Senior Data EngineerFull-time•Engineering•Data science•$118K - $276K•Kent, WA, US
Whatnot (W20)Whatnot is the largest livestream shopping platform in the U.S.Whatnot (W20)•Whatnot is the largest livestream shopping platform in the U.S.Fullstack Engineer, Seller MerchandisingFull-time•Engineering•Full stack•$190K - $215K•Los Angeles, CA, US / Seattle, WA, US / San Francisco, CA, US / New York, NY, US / Remote (New York, NY, US; Seattle, WA, US; Los Angeles, CA, US; San Francisco, CA, US)- Whatnot (W20)Whatnot is the largest livestream shopping platform in the U.S.Whatnot (W20)•Whatnot is the largest livestream shopping platform in the U.S.Engineering Manager, Seller ScalingFull-time•Engineering•Engineering manager•$230K - $260K•Los Angeles, CA, US / San Francisco, CA, US / Seattle, WA, US / New York, NY, US / Remote (Los Angeles, CA, US; New York, NY, US; Seattle, WA, US; San Francisco, CA, US)
- Whatnot (W20)Whatnot is the largest livestream shopping platform in the U.S.Whatnot (W20)•Whatnot is the largest livestream shopping platform in the U.S.Backend Engineer, LogisticsFull-time•Engineering•Backend•$190K - $245K•San Francisco, CA, US / Los Angeles, CA, US / New York, NY, US / Seattle, WA, US / Remote (San Francisco, CA, US; Los Angeles, CA, US; New York, NY, US; Seattle, WA, US)
Clipboard (W17)Connects workplaces with professionals nearby.Clipboard (W17)•Connects workplaces with professionals nearby.(15 days ago)Account ExecutiveFull-time•Sales•$160K - $200K•Nashville, TN, US / St. Louis, MO, US / NJ, US / CT, US / PA, US / New York, NY, US / OH, US / Seattle, WA, US / Portland, OR, US / Philadelphia, PA, US / Washington, DC, US / Boston, MA, US / Remote (US)
Terrakotta (W24)AI platform for phone-first sellersTerrakotta (W24)•AI platform for phone-first sellersTerrakotta Full-Stack EngineerFull-time•Engineering•Full stack•$110K - $130K•Seattle, WA, US- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(3 days ago)Backend Software EngineerFull-time•Engineering•Backend•$140K - $200K•Seattle, WA, US
- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centersImplementation SpecialistFull-time•Support•$90K - $120K•Seattle, WA, US / Remote (US)
- Whatnot (W20)Whatnot is the largest livestream shopping platform in the U.S.Whatnot (W20)•Whatnot is the largest livestream shopping platform in the U.S.Software Engineer, Search and Discovery PlatformFull-time•Engineering•Backend•$215K - $245K•San Francisco, CA, US / Los Angeles, CA, US / Seattle, WA, US / New York, NY, US / Remote
aSim (S21)Build and share apps with friendsaSim (S21)•Build and share apps with friendsSoftware Engineer, Front End + ProductFull-time•Engineering•Frontend•$120K - $160K•Seattle, WA, US / Remote
Rippling (W17)One place to run all your HR, IT, and Finance. Globally.Rippling (W17)•One place to run all your HR, IT, and Finance. Globally.(9 months ago)Product Design Lead, IT ProductsFull-time•Design•Product design•$159K - $278K•San Francisco, CA, US / New York, NY, US / Seattle, WA, US
DoorDash (S13)Restaurant delivery.DoorDash (S13)•Restaurant delivery.Staff iOS Engineer, StorefrontFull-time•Engineering•iOS•$119K - $252K•San Francisco, CA, US / Seattle, WA, US- DoorDash (S13)Restaurant delivery.DoorDash (S13)•Restaurant delivery.Engineering Manager, StorefrontFull-time•Engineering•Engineering manager•$202K - $303K•San Francisco, CA, US / Seattle, WA, US
- Whatnot (W20)Whatnot is the largest livestream shopping platform in the U.S.Whatnot (W20)•Whatnot is the largest livestream shopping platform in the U.S.Software Engineer, Developer ProductivityFull-time•Engineering•Full stack•$185K - $245K•San Francisco, CA, US / New York, NY, US / Los Angeles, CA, US / Seattle, WA, US / Remote (San Francisco, CA, US; New York, NY, US; Los Angeles, CA, US; Seattle, WA, US)
- Gordian Software (W19)Building software to remove friction in travelGordian Software (W19)•Building software to remove friction in travel(1 day ago)Software Engineer - AI Travel AgentFull-time•Engineering•Backend•$170K - $210K•Bellevue, WA, US
- Aurelian (S22)Automating non-emergency calls for 911 centersAurelian (S22)•Automating non-emergency calls for 911 centers(3 days ago)Full Stack Software EngineerFull-time•Engineering•Full stack•$140K - $200K•Seattle, WA, US
Butterflies (S14)Butterflies (S14)•Scrappy engineer who wants to work on consumer AIFull-time•Engineering•Backend•$120K - $200K•Seattle, WA, US / San Francisco, CA, US / Los Angeles, CA, US / Remote
Nimbus (W21)Nimbus reduces Datadog costs by more than 60% without Manual EffortNimbus (W21)•Nimbus reduces Datadog costs by more than 60% without Manual EffortFounding Full Stack EngineerFull-time•Engineering•Backend•$100K - $125K•Seattle, WA, US- Nimbus (W21)Nimbus reduces Datadog costs by more than 60% without Manual EffortNimbus (W21)•Nimbus reduces Datadog costs by more than 60% without Manual EffortFounding EngineerFull-time•Engineering•Backend•$100K - $125K•Seattle, WA, US
Scale AI (S16)Data-centric infrastructure to accelerate the development of AIScale AI (S16)•Data-centric infrastructure to accelerate the development of AI Senior Engineering Manager, PlatformFull-time•Engineering•Engineering manager•$213K - $265K•San Francisco, CA and New York / Seattle, WA, US- Scale AI (S16)Data-centric infrastructure to accelerate the development of AIScale AI (S16)•Data-centric infrastructure to accelerate the development of AI Account Executive, Strategic - Financial Services/InsuranceFull-time•Operations•$125K - $175K•New York, San Francisco, Seattle, Washington DC, or Remote / Remote (US)
- Scale AI (S16)Data-centric infrastructure to accelerate the development of AIScale AI (S16)•Data-centric infrastructure to accelerate the development of AI Account Executive: Lead - eCommerceFull-time•Operations•$125K - $175K•New York, San Francisco, Seattle, Washington DC, or Remote / Remote (US)
- Scale AI (S16)Data-centric infrastructure to accelerate the development of AIScale AI (S16)•Data-centric infrastructure to accelerate the development of AI Account Executive: Global AccountsFull-time•Operations•$125K - $175K•New York, San Francisco, Seattle, Washington DC, or Remote / Remote (US)
- Strac (W22)Data Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & EndpointsStrac (W22)•Data Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & Endpoints(18 days ago)Senior Software EngineerFull-time•Engineering•Full stack•$110K - $160K•Redmond, WA, US / Seattle, WA, US / Bellevue, WA, US
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