Mobile Engineer (iOS / Flutter / React Native) | FinTech | Newcastle (Onsite) | Up to £120k+
If you’re a strong mobile engineer who wants more than incremental app feature work, this is a chance to build a high-performance FinTech product at the core of a real trading and financial systems platform.
We’re working with a rapidly scaling startup building technology in partnership with an established hedge fund. They’re creating a new engineering hub in Newcastle, and mobile is a key interface into the platform.
This isn’t a typical “marketing app” or CRUD mobile build. You’ll be working on a real-time, data-heavy mobile product that surfaces trading, risk, and financial decisioning tools used in live environments.
The business is well-funded, already commercially validated, and early enough that the mobile stack, architecture, and UX patterns are still being actively defined. This is a genuine opportunity to shape the product from the ground up.
What you’ll be doing
You’ll take ownership of mobile experiences end-to-end across iOS and cross-platform development:
* Building and maintaining high-performance mobile applications in Swift (iOS), Flutter, or React Native
* Designing scalable mobile architecture for a real-time, data-intensive FinTech product
* Integrating complex backend systems (trading, risk, analytics, and pricing data)
* Working closely with backend engineers and quants to surface complex financial information in a clear, usable way
* Making key decisions around mobile architecture, performance, and UX
* Helping define mobile engineering standards and best practices in a scaling team
Tech environment
* iOS (Swift) for native development
* Flutter and/or React Native for cross-platform mobile development
* API-driven, real-time data systems
* Exposure to distributed backend / FinTech systems
* Strong engineering fundamentals over framework preference
Why Newcastle?
This is a full-time onsite role (Mon–Fri) in brand-new central Newcastle offices.
The environment is designed for focus and high-quality engineering:
* Modern offices with city and countryside views
* Strong social engineering culture (many recent relocations)
* Walk/cycle-friendly location with onsite facilities
* Stable working hours (09:00–18:00) with flexibility where needed
* Strong relocation support for UK-based candidates
What they’re looking for
We’re looking for strong mobile engineers who care about building polished, performant products across platforms.
* Strong experience in mobile development (iOS / Flutter / React Native)
* Proven track record shipping production mobile apps
* Strong understanding of mobile architecture patterns (state management, modular design, etc.)
* Experience working with complex APIs and real-time data
* Strong Computer Science fundamentals (OOP, data structures, algorithms, design patterns)
* Product-minded engineer who cares about performance and UX
* Comfortable working in a small, fast-moving engineering team shaping a platform from early stage
Package
* Salary up to £120,000+ (flexible for exceptional candidates)
* Bonus
* 25 days holiday
* Private healthcare (Bupa)
* Pension contribution
* Strong career progression in a scaling FinTech platform
* Social, tight-knit team culture with events and Friday early finishes
* Strong relocation support for UK-based candidates
Must have UK right to work (no sponsorship available).