Senior Mobile Engineer (Kikoff Main App)

* 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 * We’re looking for a Senior Mobile Engineer to help shape the future of Kikoff’s main credit building app. This product is central to our mission of helping millions of Americans build stronger credit * This role has three main areas of focus: * Grow the app. Improve the journey from download to active, paying member, including the app store, onboarding, identity verification, and the first credit action * Own payments and monetization. Build subscription, payment, and billing experiences that are fast, reliable, and easy to trust * Improve the mobile platform. Evolve the architecture, tooling, and release process for a Flutter app used by millions, helping a growing team ship faster without sacrificing quality * You’ll work closely with product managers, designers, growth marketers, data scientists, and engineers. Success is not just about shipping features. It is about improving acquisition, retention, and revenue in measurable ways * Own and optimize the mobile funnel from store → signup → onboarding/IDV → first credit action; run experiments and measure outcomes * Build acquisition plumbing: deep links, attribution, push/in-app messaging, and analytics instrumentation * Own subscription + billing UX (plans, upgrades, payment methods, autopay, history) * Build resilient payment flows (Stripe/Tabapay): retries, declines, recovery, and edge-case handling with fintech-grade security * Evolve Flutter architecture, modularity, and performance/observability for multi-team scale * Improve CI/CD, releases, codegen, testing, and the design system/component library to speed experimentation Benefits -------- * Health Benefits * Flexible PTO Policy * Kickoff Paid Holidays * Office Lunch & Dinners * Commuter Benefits * Commuter Flexible Savings * 401k Matching * Fitness Benefit Policy * API integration: You have experience with REST APIs, asynchronous operations, error states, and reliable network layers * Data fluency: You are comfortable with analytics tools, funnel analysis, and experiment results, and you use evidence to make decisions * At least 5 years of mobile development experience, with a record of building and scaling production apps on iOS or Android * Growth impact: You have owned onboarding, activation, or monetization funnels for a consumer app and can point to metrics you improved * Mobile architecture: You understand state management, patterns such as MVVM, MVI, and Clean Architecture, and the realities of maintaining a large codebase * Production ownership: You have shipped consumer apps at scale, handled crashes and edge cases, and supported features across many releases * Testing mindset: Unit, integration, and UI tests are a normal part of how you build * Platform expertise: You have a solid foundation in iOS with Swift, UIKit, or SwiftUI, or Android with Kotlin and Jetpack Compose