Europe or United States, remote first with offices available - Full-time - Engineering - Reports to the CTO
About DFNS
Finance is moving onchain. Stablecoins, tokenized deposits, securities and funds are changing how money and assets are issued, held and transferred. The destination is a financial system where any asset can be issued, moved and governed onchain with the controls regulated institutions require. That shift needs a new foundation. Just as core banking systems manage accounts and ledgers today, financial institutions need a platform to manage digital assets. DFNS is that platform. Today, we secure hundreds of billions of dollars in assets every month for more than 500 clients worldwide.
Why this role
Our clients put DFNS in front of their administrators and end users through mobile, where a passkey, a signing approval or a policy decision has to be fast, secure and obvious. You will lead mobile at DFNS, owning the iOS and Android apps and the SDKs clients embed in their own, and bringing fintech UX and bank-level security together on a phone. In year one you will ship the apps our clients rely on, make the SDKs the fastest way to put DFNS inside a client's app and set the architecture the rest of mobile is built on.
Key Responsibilities
- Lead the design and development of our iOS and Android apps, owning features from idea to launch to iteration.
- Refine the mobile SDKs and cross-platform frameworks clients embed so an integration takes days rather than weeks.
- Bring fintech UX and bank-level security together on mobile, with WebAuthn, passkeys and secure authentication done right.
- Set and hold the standards for performance, security and architecture across the mobile stack.
- Partner with Product and Design to turn complex workflows into simple ones for administrators and end users.
- Write clear documentation, review code and raise the level of everyone who touches mobile.
- Work with Product Security so mobile stays a hardened surface rather than the easiest way in.
Candidate Profile & Mindset
Must-haves
- A record of leading and shipping production mobile apps in fintech, onchain or another environment where reliability and security were not optional.
- Expert React Native, with native depth (Swift or Kotlin) for when the framework is not enough.
- Hands-on experience with WebAuthn, passkeys and secure authentication flows on mobile.
- Experience building and maintaining SDKs or cross-platform frameworks that other teams integrate.
- A sharp eye for UX and product detail. You notice the delayed transition and the misaligned button.
- Ownership of mobile architecture decisions, with the judgment to keep the stack simple.
- Clear written communication across time zones.
Nice-to-haves
- Mobile security hardening (jailbreak and root detection, secure storage, certificate pinning).
- Experience with wallets, key management or signing on device.
- Design systems and accessibility on mobile.
How we work
We are a distributed company headquartered in Paris. Our teams work from Europe, the US and Asia, with offices in New York, Geneva, Dubai, Singapore, Hong Kong and São Paulo. We write decisions down so they survive time zones. We hold our own work to the standards our clients are held to. We hire people who can own an outcome end to end and we give them the room to do it.
Perks & Compensation
A competitive base salary set by role and location, a bonus or variable plan where the role carries one and stock options vesting over four years. Healthcare, flexible vacation, parental leave and a one-time home technology allowance, with travel expenses covered. A MacBook and the equipment you need to do your best work. Remote first, with an office if you want one.
Base salary range: $120,000 to $200,000
Hiring process
We aim to complete the process in 2 weeks and we tell you where you stand after every step.
- Intro call with Co-CEO (30 minutes).
- Personality and cognitive assessments, completed on your own time (45 minutes).
- A technical take-home exercise
- Focus Interviews (about 2.5 hours): code review (45 minutes), architecture review (45 minutes), cross function (30 minutes) and security best practices (30 minutes).
- Reference calls and background checks.
If you need an accommodation at any point in the process, tell us and we will arrange it.
About DFNS
Dfns is a cybersecurity and wallet-as-a-service (WaaS) infrastructure provider powered by MPC (Multi-Party Computation). Dfns enables fintechs, banks, and Web3 apps to embed programmatic non-custodial crypto wallets directly into their applications.