Mobile Engineer - 3k per month - Immediate start

What’s In It For You

Rate : 3k per month

Contract : 3 months with 3-month extensions

Impact : You’ll be hands-on from day one, no endless onboarding, just getting stuff built.

Industry : Fintech (Private Markets / Alternative Investments)

Why This Role

They’re building a fintech product reshaping access to private markets, and they need someone who can actually deliver, not just talk about it. This means real experience building secure mobile systems, managing tokens properly, and keeping user data safe without slowing the experience down.

You’ll be working directly with their engineering team to design and implement banking-grade security with start-up agility, secure authentication flows, device-level protection, and tight token lifecycle management. If you’ve built this stuff before and want to plug into a sharp team shipping fast, this is the right kind of role.

The Opportunity

Build and ship features across iOS and Android using Flutter

Implement secure auth flows (OAuth, biometrics, passkeys, device checks)

Design and manage full token lifecycle (rotation, refresh, revocation, expiry logic)

Build device-level security features (secure storage, jailbreak / root detection, threat modelling)

Work with Riverpod for state management

Integrate with REST APIs

Collaborate on GitHub with the engineering team

Debug, optimise, and make things move faster

What They’re Looking For

5+ years in mobile development

Strong production Flutter experience across iOS & Android

Deep experience in token lifecycle management

Device-level security expertise (secure storage, biometric gating, device integrity checks)

Strong knowledge of OAuth, biometrics, and secure flows

Riverpod experience

Fintech experience (banking, payments, wallets, investment apps ideal)

Self-directed, fast to integrate, strong communicator