Selfin (YC F25)
Software Founding Engineer
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Selfin (YC F25)
Base pay range $100,000.00/yr - $200,000.00/yr
About Selfin Selfin is a stealth fintech startup building the first AI bank backed by Y Combinator. The team is founded by students from MIT, Stanford, and Imperial, with experience at NASA, Bank of America, BCG, Bloomberg, Rolls‑Royce and Revolut. We’re looking for people bold enough to build something crazy from scratch and smart enough to do it right.
About The Role We’re looking for highly motivated Software Founding Engineers to join us in San Francisco and build core parts of the product across AI, backend, and frontend.
Responsibilities
AI/LLM: LLM training (o4/5, claude), prompt engineering, fine‑tuning
Backend: Python, Cloud infrastructure (GC), API integration
Frontend: Swift (iOS), Flutter, HTML, CSS, JavaScript
Help design secure, scalable systems for financial data
Work directly with the founders and shape product and tech direction
Move fast and independently – this is not a narrow role
Qualifications
Bachelor, Master or PhD in Computer Science or related engineering degree from a top university
Strong Python skills and hands‑on experience with LLMs or GenAI tools
Willing to work onsite in San Francisco or London (we sponsor US/UK visas)
Bonus points for hackathons, publications, side projects, startup experience
People excited to own real responsibility from day one
Compensation
$100K salary (depending on skills and experience) + equity
US/UK visa sponsorship
Key role in an AI fintech shaping the future of banking
Autonomy, speed, and full visibility into product and company building
Seniority level Entry level
Employment type Full‑time
Job function Engineering and Information Technology
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at
Selfin (YC F25)
Base pay range $100,000.00/yr - $200,000.00/yr
About Selfin Selfin is a stealth fintech startup building the first AI bank backed by Y Combinator. The team is founded by students from MIT, Stanford, and Imperial, with experience at NASA, Bank of America, BCG, Bloomberg, Rolls‑Royce and Revolut. We’re looking for people bold enough to build something crazy from scratch and smart enough to do it right.
About The Role We’re looking for highly motivated Software Founding Engineers to join us in San Francisco and build core parts of the product across AI, backend, and frontend.
Responsibilities
AI/LLM: LLM training (o4/5, claude), prompt engineering, fine‑tuning
Backend: Python, Cloud infrastructure (GC), API integration
Frontend: Swift (iOS), Flutter, HTML, CSS, JavaScript
Help design secure, scalable systems for financial data
Work directly with the founders and shape product and tech direction
Move fast and independently – this is not a narrow role
Qualifications
Bachelor, Master or PhD in Computer Science or related engineering degree from a top university
Strong Python skills and hands‑on experience with LLMs or GenAI tools
Willing to work onsite in San Francisco or London (we sponsor US/UK visas)
Bonus points for hackathons, publications, side projects, startup experience
People excited to own real responsibility from day one
Compensation
$100K salary (depending on skills and experience) + equity
US/UK visa sponsorship
Key role in an AI fintech shaping the future of banking
Autonomy, speed, and full visibility into product and company building
Seniority level Entry level
Employment type Full‑time
Job function Engineering and Information Technology
#J-18808-Ljbffr