Senior Full-Stack Engineer — React/Node, Scale & Mentorship

United States Digital Space LLC; Greater London; On-site; GBP 75,000 - 120,000; Full time

Job summary

J.P. Morgan in London seeks an experienced Software Engineer III to join the Infrastructure Platforms, Data Center Services team.

You will design and deliver full-stack solutions using React on the frontend and Node.js/TypeScript on the backend, while ensuring security, scalability and reliability across enterprise systems. The role emphasizes collaboration, continuous improvement and mentoring of junior engineers, with opportunities to work with cutting-edge tools and AI-assisted development

Qualifications

• Formal training or certification on software engineering concepts and proficient applied experience.
• Hands-on practical experience in system design, application development, testing, and operational stability.
• Proficiency in modern programming languages, with strong experience in JavaScript/TypeScript (React, Node.js) required.
• Experience developing, debugging, and maintaining code in a large-scale environment using modern programming and database querying languages.

Responsibilities

• Apply advanced technical skills to design, develop, and deliver full-stack solutions across frontend (React) and backend (Node.js/TypeScript, Python) services
• Create secure, high-quality production code and maintain algorithms that run reliably and synchronously with appropriate systems
• Produce architecture and design artifacts for complex application components, ensuring design constraints are met in implementation
• Gather, analyze, synthesize, and develop visualizations from large data sets in support of continuous improvement of software applications
• Proactively identify hidden problems and patterns in data, and use these insights to drive improvements to coding hygiene and system architecture
• Develop subject matter expertise in a specific technical domain relevant to Data Center Services
• Contribute to software engineering communities of practice and employee resource groups through facilitation or content contribution
• Mentor junior software engineers and actively support their technical growth and development
• Leverages enterprise-authorized AI coding assist tools within the work environment to improve code quality, delivery speed, and productivity
• Applies knowledge of tools within the Software Development Life Cycle toolchain to improve automation value

Tools

JavaScript/TypeScript

React

Node.js

Job description

J.P. Morgan in London seeks an experienced Software Engineer III to join the Infrastructure Platforms, Data Center Services team.

You will design and deliver full-stack solutions using React on the frontend and Node.js/TypeScript on the backend, while ensuring security, scalability and reliability across enterprise systems. The role emphasizes collaboration, continuous improvement and mentoring of junior engineers, with opportunities to work with cutting-edge tools and AI-assisted development