# On-site backend developer jobs in San Francisco > Browse on-site backend developer jobs in San Francisco at top tech companies, updated every 12 hours. Each role links to the original posting on the company's ATS, which Lazee autofills in a few clicks. Canonical: https://lazee.dev/careers?role=backend&city=san-francisco&workplace=onsite Last updated: 2026-10-25 97 open jobs, page 1 of 4, newest first. Each job links to its posting on the company's own applicant tracking system, which the Lazee extension autofills. ## Jobs - [Software Engineer, Backend (All Levels)](https://www.workatastartup.com/jobs/115060) at Zip. San Francisco · On-site · Full-time · posted 2026-10-07. Apply on Y Combinator. - [Software Engineer, Multimodal Backend Systems](https://www.workatastartup.com/jobs/114722) at Eventual. San Francisco, CA, US · On-site · Full-time · $150K - $250K · posted 2026-10-06. Apply on Y Combinator. - [Senior Software Engineer, Backend](https://www.workatastartup.com/jobs/114821) at Forage. San Francisco, United States / New York, United States · On-site · Full-time · $185K - $200K · posted 2026-10-06. Apply on Y Combinator. - [Senior Backend Engineer](https://www.workatastartup.com/jobs/112531) at Mintlify. San Francisco · On-site · Full-time · $190K - $265K · posted 2026-09-28. Apply on Y Combinator. - [Backend Engineer](https://www.workatastartup.com/jobs/112528) at Mintlify. San Francisco · On-site · Full-time · $130K - $200K · posted 2026-09-28. Apply on Y Combinator. - [Founding Software Engineer](https://www.workatastartup.com/jobs/111227) at Copperlane. San Francisco, CA, US · On-site · Full-time · $140K - $220K + 0.50% - 2.00% equity · posted 2026-09-25. Apply on Y Combinator. - [Backend Engineer, Generalist](https://www.workatastartup.com/jobs/112032) at Lapel. San Francisco · On-site · Full-time · $150K - $250K · posted 2026-09-25. Apply on Y Combinator. - [Backend Engineer, Agents](https://www.workatastartup.com/jobs/112031) at Lapel. San Francisco · On-site · Full-time · $150K - $250K · posted 2026-09-25. Apply on Y Combinator. - [Backend Engineer, Core Platform](https://www.workatastartup.com/jobs/112030) at Lapel. San Francisco · On-site · Full-time · $150K - $250K · posted 2026-09-25. Apply on Y Combinator. - [Backend Engineer, Primitives](https://www.workatastartup.com/jobs/112029) at Lapel. San Francisco · On-site · Full-time · $150K - $250K · posted 2026-09-25. Apply on Y Combinator. - [Founding Engineer](https://www.workatastartup.com/jobs/110499) at Limrun. San Francisco, CA, US · On-site · Full-time · $180K - $300K · posted 2026-09-25. Apply on Y Combinator. - [Software Engineer Backend Intern (Summer 2027)](https://www.workatastartup.com/jobs/111588) at Astranis. San Francisco, California, United States · On-site · Full-time · posted 2026-09-25. Apply on Y Combinator. - [Member of Technical Staff | Engineering & Research](https://www.workatastartup.com/jobs/106868) at attimet. San Francisco, CA, US · On-site · Full-time · $125K - $250K + 0.10% - 1.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Member of Technical Staff (Product)](https://www.workatastartup.com/jobs/104831) at Jarmin. San Francisco, CA, US · On-site · Full-time · $200K - $300K + 0.25% - 1.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Member of Technical Staff (Agents)](https://www.workatastartup.com/jobs/104830) at Jarmin. San Francisco, CA, US · On-site · Full-time · $200K - $300K + 0.25% - 1.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Member of Technical Staff (Agent Infrastructure)](https://www.workatastartup.com/jobs/104829) at Jarmin. San Francisco, CA, US · On-site · Full-time · $200K - $300K + 0.25% - 1.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Founding Engineer](https://www.workatastartup.com/jobs/107957) at SubImage. San Francisco, CA, US · On-site · Full-time · $170K - $230K + 0.50% - 1.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Product Engineer](https://www.workatastartup.com/jobs/105465) at primitive. San Francisco, CA, US · On-site · Full-time · $190K - $230K + 0.25% - 0.75% equity · posted 2026-08-26. Apply on Y Combinator. - [Product Engineer, Backend](https://www.workatastartup.com/jobs/104495) at David AI. San Francisco · On-site · Full-time · $165K - $225K · posted 2026-08-26. Apply on Y Combinator. - [Quantitative Engineer](https://www.workatastartup.com/jobs/107800) at Conviction. San Francisco, CA, US · On-site · Full-time · $90K - $210K + 0.50% - 2.00% equity · posted 2026-08-26. Apply on Y Combinator. - [Senior Backend Software Engineer](https://www.workatastartup.com/jobs/106209) at FleetWorks. Chicago / San Francisco · On-site · Full-time · posted 2026-08-24. Apply on Y Combinator. - [Senior Software Engineer](https://www.workatastartup.com/jobs/99181) at Artie. San Francisco, CA, US · On-site · Full-time · $150K - $250K · posted 2026-07-27. Apply on Y Combinator. - [Senior Backend Engineer](https://www.workatastartup.com/jobs/102151) at LiteLLM. San Francisco · On-site · Full-time · $200K - $260K · posted 2026-07-27. Apply on Y Combinator. - [Software Engineering Intern (Summer 2027)](https://www.workatastartup.com/jobs/97519) at CTGT. San Francisco, CA, US · On-site · Internship · $8K - $12K / monthly · posted 2026-06-27. Apply on Y Combinator. - [Founding Engineer (Backend)](https://www.workatastartup.com/jobs/98553) at Fenrock AI. San Francisco, CA, US · On-site · Full-time · $150K - $250K · posted 2026-06-27. Apply on Y Combinator. Next page: https://lazee.dev/careers?role=backend&city=san-francisco&workplace=onsite&page=2 ## Broader searches - [On-site jobs in San Francisco](https://lazee.dev/careers?city=san-francisco&workplace=onsite) (2,144 jobs) - [Backend developer jobs in San Francisco](https://lazee.dev/careers?role=backend&city=san-francisco) (152 jobs) - [On-site backend developer jobs](https://lazee.dev/careers?role=backend&workplace=onsite) (200 jobs) ## Browse by role - [On-site engineering jobs in San Francisco](https://lazee.dev/careers?role=engineering&city=san-francisco&workplace=onsite) (1,107 jobs) - [On-site full stack developer jobs in San Francisco](https://lazee.dev/careers?role=fullstack&city=san-francisco&workplace=onsite) (454 jobs) - [On-site sales jobs in San Francisco](https://lazee.dev/careers?role=sales&city=san-francisco&workplace=onsite) (280 jobs) - [On-site AI/ML engineer jobs in San Francisco](https://lazee.dev/careers?role=ai-ml&city=san-francisco&workplace=onsite) (228 jobs) - [On-site customer success jobs in San Francisco](https://lazee.dev/careers?role=support&city=san-francisco&workplace=onsite) (154 jobs) - [On-site hardware engineer jobs in San Francisco](https://lazee.dev/careers?role=hardware&city=san-francisco&workplace=onsite) (137 jobs) - [On-site marketing jobs in San Francisco](https://lazee.dev/careers?role=marketing&city=san-francisco&workplace=onsite) (101 jobs) - [On-site software engineer jobs in San Francisco](https://lazee.dev/careers?role=software&city=san-francisco&workplace=onsite) (77 jobs) - [On-site product manager jobs in San Francisco](https://lazee.dev/careers?role=product&city=san-francisco&workplace=onsite) (63 jobs) - [On-site design jobs in San Francisco](https://lazee.dev/careers?role=design&city=san-francisco&workplace=onsite) (57 jobs) - [On-site DevOps jobs in San Francisco](https://lazee.dev/careers?role=devops&city=san-francisco&workplace=onsite) (28 jobs) - [On-site frontend developer jobs in San Francisco](https://lazee.dev/careers?role=frontend&city=san-francisco&workplace=onsite) (27 jobs) - [On-site security jobs in San Francisco](https://lazee.dev/careers?role=security&city=san-francisco&workplace=onsite) (23 jobs) - [On-site data jobs in San Francisco](https://lazee.dev/careers?role=data&city=san-francisco&workplace=onsite) (15 jobs) - [On-site QA jobs in San Francisco](https://lazee.dev/careers?role=qa&city=san-francisco&workplace=onsite) (11 jobs) - [On-site mobile developer jobs in San Francisco](https://lazee.dev/careers?role=mobile&city=san-francisco&workplace=onsite) (10 jobs) ## Browse by city - [On-site backend developer jobs in New York](https://lazee.dev/careers?role=backend&city=new-york&workplace=onsite) (36 jobs) - [On-site backend developer jobs in Bangalore](https://lazee.dev/careers?role=backend&city=bangalore&workplace=onsite) (19 jobs) - [On-site backend developer jobs in London](https://lazee.dev/careers?role=backend&city=london&workplace=onsite) (13 jobs) ## Browse by workplace - [Remote backend developer jobs in San Francisco](https://lazee.dev/careers?role=backend&city=san-francisco&workplace=remote) (28 jobs) ## Related - [Lazee.dev home: the job application autofill extension](https://lazee.dev) - [Jobs API](https://lazee.dev/api) - [About Lazee.dev](https://lazee.dev/about) - [Privacy Policy](https://lazee.dev/privacy) - [Terms of Service](https://lazee.dev/terms)