Lead Mobile Engineer
About this role
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
Company at a glance
Dfns is the leading Wallets-as-a-Service (WaaS) platform for simplifying digital asset management and powering onchain services at scale. Our programmable wallet platform brings together transaction management, workflow governance, key orchestration, and third-party integrations into one secure operating system for blockchains, enabling custody, payments, trading, tokenization, and banking. Built on advanced security and cryptography, Dfns is trusted by over 300 financial institutions and applications—including DTCC, ABN AMRO, Broadridge, Fidelity, Zodia Custody, Banca Sella, Stripe, Moonpay, Circle, IBM, Deblock, Republic, Gemini—and secures over $5 billion in monthly transactions.
Founded in 2020, Dfns has raised $30 million from global investors such as Further Ventures, White Star Capital, Motive Ventures, Bpifrance, Coinbase, Wintermute, and Susquehanna. Originally incubated by Techstars and Station F in Paris, Dfns now operates globally with teams across the US, Europe, the Middle East, and Asia.
Top Benefits
- Healthcare
- Travel Expenses
- Stock Options
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