Senior Java Engineer

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Black heart symbol on a white background.
Contact sales

We’d love to see how we can streamline your hiring together.

Request a demo
Black heart icon on a white background.
Contact sales

We’d love to see how we can streamline your hiring together.

Request a demo
Black heart on white background.

Contract Type:

Contractor

Location:

London

Industry:

Contact Name:

John Fournier

Contact Email:

john.fournier@initialize-it.com

Contact Phone:

Date Published:

07-Sep-2026

Senior Java Engineer - 12 months London City/hybrid - - fantastic financial client
Essential skills
  • Strong Java fundamentals (Java 21 preferred) including core concepts (collections, concurrency, memory management).
  • Solid experience with Spring Framework (Spring 4+) and Spring Boot 3.x.
  • Experience building and consuming REST APIs.
  • Good knowledge of React (version 17) and integration with Back End services.
  • Strong understanding of web application architecture and Client Server communication.
  • Experience with SQL and relational databases (eg PostgreSQL).
  • Proficiency with version control (Git) and build tools (Maven/Gradle).
  • Strong focus on clean code, unit testing, and code reviews.
  • Familiar with Agile development practices.
  • Comfortable working in Linux/Unix environments.
  • 4-8+ years of software engineering experience.
Other desirable skills
  • Experience with JSF/JSP applications and Legacy UI technologies.
  • Familiarity with modern Front End practices and component-based architectures.
  • Experience with CI/CD pipelines and testing practices.
  • Exposure to Docker/containerization.
  • Basic understanding of distributed systems.
  • Familiarity with Spring ecosystem tooling.
  • Knowledge of financial systems or trading platforms is a plus.
Role
  • Contributes to design, development, and implementation of Back End services and web applications.
  • Writes clean, maintainable, and well-tested code following established engineering practices.
  • Participates in technical design discussions and collaborates with senior engineers and architects.
  • Works closely with Front End developers to integrate Back End services with UI components.
  • Supports troubleshooting, debugging, and performance optimization of applications.
  • Breaks down user stories into technical tasks and delivers within agreed timelines.
  • Collaborates effectively in Agile teams with product owners, QA, and other developers.
  • Maintains and improves existing systems while ensuring stability and reliability.
  • Builds positive relationships within the team and contributes to a collaborative environment.
  • Communicates technical concepts clearly to both technical and non-technical stakeholders.
  • Continuously develops technical expertise and stays up to date with modern technologies and frameworks.

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