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Principal React Native Engineer — FinTech Platform Lead

JPMorganChase

Greater London

On-site

GBP 85,000 - 120,000

Full time

Today
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Job summary

A leading financial services provider in Greater London is seeking a Principal Engineer to lead product development initiatives. The role emphasizes collaboration, innovative solutions, and a strong understanding of React Native and Expo. Candidates should possess extensive experience in mobile app development and the ability to effectively lead a high-impact engineering team. This position offers an exciting opportunity to shape the future of fintech products and contribute to a people-first environment.

Qualifications

  • Formal training or certification on React engineering concepts.
  • Proven delivery of commercial React Native applications in production across Android & iOS at scale.
  • Deep understanding of React Native and Expo internals.
  • Latest knowledge of architecture, tooling and best practices in mobile app development.
  • Mastery of TypeScript.
  • Experience optimizing large codebases.
  • Hands‑on knowledge of mobile build & release systems.
  • Strong grasp of architecture patterns.

Responsibilities

  • Establish and refine SDLC optimizing developer experience, velocity and robustness.
  • Design a release strategy enabling frequent, stable releases.
  • Define and evolve React Native / Expo mobile architecture.
  • Design and deliver a modular core platform enabling rapid feature iteration.
  • Recruit, mentor and lead a lean, high‑impact engineering team.

Skills

React engineering concepts
Commercial React Native applications
React Native and Expo internals
Mobile app development best practices
TypeScript
Optimizing large codebases
Mobile build & release systems
Architecture patterns
Job description
A leading financial services provider in Greater London is seeking a Principal Engineer to lead product development initiatives. The role emphasizes collaboration, innovative solutions, and a strong understanding of React Native and Expo. Candidates should possess extensive experience in mobile app development and the ability to effectively lead a high-impact engineering team. This position offers an exciting opportunity to shape the future of fintech products and contribute to a people-first environment.
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