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Selfin (YC F25) Logo

Software Founding Engineer

Selfin (YC F25)

From $100,000
Nov 8, 2025
San Francisco, CA, United States of America
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Selfin is a stealth fintech startup building the first AI bank.

Requirements

  • Strong Python skills and hands-on experience with LLMs or GenAI tools

Responsibilities

  • LLM training (o4/5, claude), prompt engineering, fine-tuning
  • Python, Cloud infrastructure (GC), API integration
  • Swift (iOS), Flutter, HTML, CSS, Java Script
  • 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

Other

  • Bacherlor, Master or PHD in Computer Science or related engineering degree from a top university
  • Willing to work onsite in San Francisco or London (we sponsor US/UK visas)
  • Bonus points for: hackathons, publications, side projects, startup experience
  • People that are excited to own real responsibility from day one
  • Key role in a AI fintech shaping the future of banking
  • Autonomy, speed, and full visibility into product and company building