Lorien's leading banking client is looking for an experienced Full Stack Developer to join a major greenfield technology programme within Financial Services.

You will be part of a team building a brand-new Asset Servicing platform, replacing both an existing legacy internal system and a US-based vendor solution. This is a long-term transformation programme offering the opportunity to work across modern front-end, BFF and microservices-based backend technologies.

The role requires genuine full-stack development experience, although candidates can be stronger on either the front-end or backend.

The ideal candidate will be a hands-on Full Stack Developer who is comfortable working across Angular/React, TypeScript/Node.js, Java microservices and SQL. You may naturally lean towards either front-end or backend engineering, but you will have sufficient experience across the stack to contribute to the end-to-end solution.

Previous experience building platforms within Financial Services and particularly Asset Servicing or settlement environments would be a significant advantage.

This role is based in London.

This role will be Via Umbrella.

Working in a Hybrid Model of 50% a week on site.

Key Responsibilities

• Design, develop and deliver functionality across the full technology stack.
• Build modern user interfaces using Angular, with React experience also considered.
• Work within a Micro Front End (MFE) architecture.
• Develop Backend for Frontend (BFF) services using TypeScript and Node.js.
• Design and develop backend services using Java and microservices architecture.
• Support the migration from Java 8/11 towards Java 21/23.
• Develop and integrate solutions using MS SQL Server.
• Work closely with engineering, architecture, product and business teams to translate requirements into scalable technical solutions.
• Contribute to technical design, architecture decisions and engineering best practices.
• Support the replacement and migration away from existing legacy and vendor platforms.

Technical Experience

• Strong commercial Full Stack Development experience.
• Angular development experience preferred; strong React candidates will also be considered.
• Experience working with Micro Front End architectures.
• TypeScript / Node.js, ideally within a BFF architecture.
• Strong Java development experience, ideally Java 8/11 and exposure to newer versions.
• Experience developing microservices-based applications.
• Strong relational database experience, ideally MS SQL Server.
• Experience working on complex enterprise-scale applications.

Highly Desirable:

• Architecture and solution design experience.
• Experience modernising or replacing legacy technology platforms.
• Financial Services experience.
• Experience within Asset Servicing, Asset Management, Securities or Investment Banking environments.

Domain Knowledge

• Knowledge of the asset and settlement lifecycle would be particularly beneficial, including:
• Asset servicing and securities processing.
• Settlement operations.
• Trade corrections and correction lifecycles.
• Clearing and execution.
• Trade booking and downstream processing.
• Understanding of how transactions flow across front, middle and back-office systems.