Senior Fullstack Mobile Engineer - Backend Architecture

United States Digital Space LLC; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Competitive Rates

Flexible working arrangements

Career development opportunities

Innovative projects

Collaborative culture

Job summary

United States Digital Space LLC in London is seeking a Senior Fullstack Mobile Engineer to own end-to-end delivery across backend and mobile features in a greenfield platform.

You will design scalable backend using NestJS, Node.js and TypeScript, and contribute to mobile features with React Native and Expo, while collaborating with Kotlin/Spring Boot teams to ensure robust API integration and secure, high-performance systems.

Qualifications

• Proven senior engineer capable of autonomous ownership of architecture, data modelling and deployment strategies.
• Strong track record delivering production-grade software in complex environments.
• Experience influencing architecture across team boundaries.

Responsibilities

• Design, build and maintain scalable backend services using NestJS, Node.js and TypeScript.
• Deliver end-to-end features across backend and mobile applications.
• Lead technical discussions and align with neighbouring teams across stacks.
• Design secure identity flows and enterprise authentication.

Skills

Senior engineering experience

Autonomous working

Architecture decisions

Tools

NestJS

Node.js

TypeScript

React Native

Expo

Kotlin

Spring Boot

PostgreSQL

Redis

Auth0

Docker

Docker Compose

AWS ECS

Job description

United States Digital Space LLC in London is seeking a Senior Fullstack Mobile Engineer to own end-to-end delivery across backend and mobile features in a greenfield platform.

You will design scalable backend using NestJS, Node.js and TypeScript, and contribute to mobile features with React Native and Expo, while collaborating with Kotlin/Spring Boot teams to ensure robust API integration and secure, high-performance systems.