Mobile App Developer (iOS / Flutter / React Native) in Newcastle upon Tyne

Newcastle upon Tyne Full-Time 120000 - 120000 £ / year (est.) No working from home possible

Apply Now

At a Glance

Tasks: Build and maintain high-performance mobile applications in Swift, Flutter, or React Native.
Company: Join a rapidly scaling FinTech startup partnered with an established hedge fund.
Benefits: Enjoy a salary up to £120,000+, 25 days holiday, and strong relocation support.
Other info: This is a full-time onsite role in brand-new central Newcastle offices.
Why this job: Shape a real-time, data-heavy mobile product from the ground up in Newcastle.
Qualifications: Strong understanding of mobile architecture patterns and experience with complex APIs required.

The predicted salary is between 120000 - 120000 £ per year.

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:

Take ownership of mobile experiences end-to-end across iOS and cross-platform development.
Build and maintain high-performance mobile applications in Swift (iOS), Flutter, or React Native.
Design scalable mobile architecture for a real-time, data-intensive FinTech product.
Integrate complex backend systems (trading, risk, analytics, and pricing data).
Work closely with backend engineers and quants to surface complex financial information in a clear, usable way.
Make key decisions around mobile architecture, performance, and UX.
Help define mobile engineering standards and best practices in a scaling team.

Tech environment:

Flutter and/or React Native for cross-platform mobile development.
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:

Strong mobile engineers who care about building polished, performant products across platforms.
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.
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).