Sr. Fullstack Engineer: User Retention & Ecosystem Hybrid

Kikoff; San Francisco (CA); Hybrid; USD 244,000 - 292,000; Full time

Benefits offered by this job

Hybrid work model

SF office three days a week

Job summary

Kikoff is seeking a Senior Fullstack Engineer to drive user-facing projects within the User Retention and App Ecosystem team. You will own product domains end-to-end, from data-driven retention initiatives to cross-app integrations, delivering impact for millions of users.

This role emphasizes backend strength with a frontend (React) or mobile (Flutter) focus, strong cross-functional collaboration, and pragmatic design.

Qualifications

• 6+ years of industry experience with breadth and depth of product impact.
• Backend-focused with experience in either web frontend (React) or mobile (Flutter).
• Strong cross-functional communication with product, data, design and legal partners.
• Ability to own and drive complex projects end-to-end, coordinating focused teams.

Responsibilities

• Lead data-driven projects around user retention and ecosystem integration end-to-end.
• Own 1–2 large product areas across credit report retrieval, credit disputes, customer off-boarding, and cross-app integration.
• Enhance observability, reliability, and operational excellence across existing services.

Skills

Fullstack experience

Backend focus

React

Flutter

Cross-functional

System design

Observability

Education

CS degree

Tools

Ruby on Rails

React

Flutter

MySQL

Job description

Kikoff is seeking a Senior Fullstack Engineer to drive user-facing projects within the User Retention and App Ecosystem team. You will own product domains end-to-end, from data-driven retention initiatives to cross-app integrations, delivering impact for millions of users.

This role emphasizes backend strength with a frontend (React) or mobile (Flutter) focus, strong cross-functional collaboration, and pragmatic design.