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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Engineer - React/Java - **Company:** TEKsystems - **Location:** London, UK - **Experience:** Experienced - **Salary:** £130,000.0 - £195,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Adobe InDesign, Agile Methodology, Automation of Tests, Unit Testing, Client Server Models, Code Review, Continuous Integration, Relational Databases, Software Debugging, Software Design Patterns, Linux, Distributed Systems, Memory Management, Gradle, Human-Computer Interaction, Spring Framework, JavaServer Faces, Javaserver Pages, PostgreSQL, Apache Maven, Performance Tuning, Software Engineering, SQL Databases, Systems Architecture, Trade Promotion Management, Web Applications, Web Application Frameworks, ReactJS, Spring-boot, Git, Containerization, Build Tools, Front End Software Development, Restful APIs, Software Version Control, Docker, Service Stack - **Published:** July 14, 2026 - **Apply:** https://www.careerboard.com/pt/en/find-jobs-in-United-Kingdom/-38910FFC309B397A39/ ## About the Role * Strong proficiency in Java (Java 21 preferred), including solid understanding of core concepts such as collections, concurrency and memory management. * Solid commercial experience with Spring Framework (Spring 4+) and Spring Boot 3.x for building Back End services. * Proven experience designing, building and consuming REST APIs. * Good knowledge of modern Front End technologies and frameworks (including version 17) and their integration with Back End services. * Strong understanding of web application architecture, Client Server communication and related design patterns. * Hands-on experience with SQL and relational databases, ideally PostgreSQL. * Proficiency with version control systems, particularly Git, and build tools such as Maven or Gradle. * Strong focus on writing clean, readable code with comprehensive unit tests and active participation in code reviews. * Familiarity with Agile development practices and working within cross-functional Agile teams. * Comfortable working in Linux/Unix environments for development, deployment and troubleshooting. * Approximately 4-8+ years of professional software engineering experience in Back End or full stack roles. Additional Skills & Qualifications * experience working with JSF and JSP-based applications or other Legacy user interface technologies. * Familiarity with modern Front End practices, including component-based architectures and contemporary JavaScript frameworks. * experience with CI/CD pipelines and automated testing practices to support continuous integration and delivery. * Exposure to Docker or other containerisation technologies. * Basic understanding of distributed systems concepts and patterns. * Familiarity with broader Spring ecosystem tooling and libraries. * Knowledge of financial systems, trading platforms or capital markets workflows is an advantage. ## Description This Full Stack Engineer role sits within a data and analytics team focused on delivering highly reliable, scalable trading and trade management solutions. You will work as a hands-on Java developer, maintaining and enhancing Back End and web-based applications while contributing to the ongoing evolution of a modular, end-to-end trading platform and its web user interfaces. The platform enables users to execute a wide range of trading strategies across multiple markets and time zones, manage risk throughout the trade life cycle, and connect with a broad network of execution, prime and clearing brokers. Responsibilities * Design, develop and implement Back End services and web applications that support a complex trading and trade management platform. * Write clean, maintainable and well-tested code in line with established engineering standards and best practices. * Participate in technical design discussions and collaborate closely with senior engineers and architects to shape system architecture and solutions. * Work closely with Front End developers to integrate Back End services with user interface components, ensuring seamless end-to-end functionality. * Support troubleshooting, debugging and performance optimisation activities across Back End and web applications. * Break down user stories into well-defined technical tasks and deliver them within agreed timelines in an Agile environment. * Maintain and enhance existing systems, ensuring stability, reliability and continuous improvement of core services and user interfaces. * Collaborate effectively within cross-functional Agile teams, including product owners, QA engineers and other developers. * Build and maintain positive working relationships within the team and contribute to a collaborative, supportive engineering culture. * Communicate technical concepts clearly and confidently to both technical and non-technical stakeholders. * Continuously develop technical expertise by learning and adopting modern technologies, frameworks and tools relevant to full stack development., You will join a collaborative engineering culture that values technical excellence, knowledge sharing and continuous improvement. The environment encourages open communication, active participation in design discussions and ongoing professional development with modern technologies and frameworks. You will work in cross-functional Agile teams, gaining exposure to complex, high-impact systems in the financial technology domain while contributing to platforms that support global markets and diverse participants. Work Environment You will work in a modern, technology-focused environment building and maintaining Back End services and web applications that support a large-scale trading and trade management platform. The technology stack includes Java (with a preference for Java 21), Spring Framework and Spring Boot, RESTful services, SQL and PostgreSQL, modern Front End frameworks, Git, Maven or Gradle, and CI/CD tooling, with exposure to Docker and containerisation. Development typically takes place on Linux/Unix systems, following Agile methodologies with close collaboration between developers, QA and product teams. The role involves regular code reviews, automated testing and performance optimisation within a professional, team-oriented setting. Location London, UK Rate/Salary 500.00 - 750.00 GBP Daily ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [How to kill JavaScript from your Stack with HTMX and Kotlin](https://www.wearedevelopers.com/videos/1427-how-to-kill-javascript-from-your-stack-with-htmx-and-kotlin) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)