Startups · AI

Senior Backend Engineer - Fynn (AI Credit Coach)

Kikoff · San Francisco · On-site

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About Kikoff

Kikoff's credit building app is the the fastest way to build credit safely, with plans from $5/month. Backed by Lightspeed.

About the role

We're scaling fast. Join us if you want to build something meaningful and help millions of people move forward financially. This is a consumer fintech startup, and you will be working with serial entrepreneurs who have built strong consumer brands and innovative products. We value extreme ownership, clear communication, a strong sense of craftsmanship, and the desire to create lasting work and work relationships. Yes, you can build an exciting business AND have real-life real-customer impact.

What they're looking for

  • 5+ years of experience with modern backend frameworks and a track record of building and scaling production systems
  • Strong systems design skills, you've architected and shipped distributed systems that handle high throughput and maintain data consistency
  • Track record of making infrastructure decisions that balance technical excellence with business pragmatism
  • Production experience with background job processing systems (Sidekiq, Resque, or similar)
  • Solid understanding of database optimization, caching strategies, and performance tuning
  • Comfort building in an environment where correctness, latency, and user trust all matter at once
More about this role

Kikoff: The Fintech Powering Financial Security at Scale

Kikoff is a profitable, pre-IPO fintech company on a mission to empower everyone to achieve financial security. With record revenue growth in 2025 and a unicorn valuation, we've built a suite of products that help millions of people build credit, access liquidity, and save money.

We're scaling fast. Join us if you want to build something meaningful and help millions of people move forward financially.

This is a consumer fintech startup, and you will be working with serial entrepreneurs who have built strong consumer brands and innovative products. We value extreme ownership, clear communication, a strong sense of craftsmanship, and the desire to create lasting work and work relationships. Yes, you can build an exciting business AND have real-life real-customer impact.

Fynn is Kikoff's AI credit coach, and the intelligence layer across our entire ecosystem. Rather than offering generic advice, Fynn analyzes a user's credit report and financial profile to deliver highly personalized answers, surface the next steps that matter most for their goals, and connect them directly to the tools that help them take action, from...

Read the full posting on Kikoff's site ↗

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