HiringCafe
Posted 2mo ago

Lead Mobile Engineer

@ Dfns
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Paris or New York
$120k-$220k/yrRemoteFull Time
Responsibilities:design apps, own features, refine SDKs
Requirements Summary:8+ years mobile engineering; expert in React Native or native mobile; strong UX focus; secure authentication; fintech/onchain experience.
Technical Tools Mentioned:React Native, Swift, Kotlin, WebAuthn, passkeys
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Job Description

Join a team of engineers and cryptographers building the infrastructure behind the next generation of financial systems.

We’re hiring a Lead Mobile Engineer to build the mobile experience of our platform. You’ll design and ship iOS and Android applications, improve our cross-platform architecture, and build interfaces that are fast, intuitive, and reliable. We’re looking for strong expertise in React Native and a sharp eye for product and UX details. You have experience shipping production mobile apps in fintech, blockchain, or other high-reliability environments. You’ll work closely with product, security, and backend teams to turn complex requirements into simple mobile workflows for both administrators and end users. This role includes owning projects end to end, contributing to mobile architecture decisions, and ensuring the mobile stack remains secure, reliable, and easy to build on.

Responsibilities

  • Lead the design and development of our iOS/Android apps.

  • Own features from idea to launch to iteration.

  • Refine SDKs and cross-platform frameworks for smooth integrations.

  • Bring fintech-grade UX and bank-grade security to mobile wallets.

  • Set high standards for performance, security, and architecture.

  • Partner with product and design to ship features fast.

  • Write clear docs, review code, and mentor teammates.

Requirements

  • 8+ years in mobile engineering, with experience leading projects.

  • Expert in React Native or native mobile (Swift, Kotlin, etc.).

  • Skilled in cross-platform development and SDKs.

  • Hands-on with WebAuthn, passkeys, and secure authentication.

  • Proven record of shipping mobile apps in fintech or onchain.

  • Strong sense of UX, detail-oriented, and reliable.

  • Clear communicator who thrives in fast-moving teams.

Recruiting Process

  • Intro call with Co-CEO (30 min)

  • Personality and cognitive tests (45 min)

  • Coding test in a language of your choice

  • Focus interviews with the hiring panel (180 min)

    • Code review

    • Architecture review

    • Security fundamentals

    • Culture check fit

  • Final interview with CTO (30 min)

  • Reference calls and background checks

Terms

  • Title: Lead Mobile Engineer

  • Salary: $120,000-220,000 per year (full-time)

  • Equity: 100-200 stock options vested over 4 years

  • Benefits: Healthcare and travel expenses

  • Location: US or EU (remote-first, office optional)

  • Equipment: MacBook Pro + essentials