Full Stack Engineer - React/Java in London

Full Stack Engineer - React/Java in London

London Full-Time 50000 - 75000 £ / year (est.) No working from home possible
Teksystems

At a Glance

  • Tasks: Design and develop innovative trading solutions using Java and modern web technologies.
  • Company: Join a leading tech firm in the financial sector with a collaborative culture.
  • Benefits: Competitive daily rate, remote work options, and opportunities for professional growth.
  • Other info: Dynamic environment with excellent career advancement opportunities in fintech.
  • Why this job: Make an impact on global trading platforms while working with cutting-edge technology.
  • Qualifications: Strong Java skills and experience with Spring Framework; teamwork and Agile experience preferred.

The predicted salary is between 50000 - 75000 £ per year.

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 backend 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 lifecycle, and connect with a broad network of execution, prime and clearing brokers.

Responsibilities

  • Design, develop and implement backend 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 frontend developers to integrate backend services with user interface components, ensuring seamless end-to-end functionality.
  • Support troubleshooting, debugging and performance optimisation activities across backend 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.

Essential Skills

  • 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 backend services.
  • Proven experience designing, building and consuming REST APIs.
  • Good knowledge of modern frontend technologies and frameworks (including version 17) and their integration with backend 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 backend or full stack roles.

Additional Skills & Qualifications

  • Experience working with JSF and JSP-based applications or other legacy user interface technologies.
  • Familiarity with modern frontend 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.

Why Work Here?

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 backend 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 frontend 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

Full Stack Engineer - React/Java in London employer: Teksystems

As an Azure Solution Architect with us, you'll thrive in a dynamic work culture that prioritises innovation and collaboration. We offer competitive benefits, including professional development opportunities to enhance your skills in cloud technologies, all while working in a vibrant location that fosters creativity and teamwork. Join us to be part of a forward-thinking company that values your contributions and supports your career growth.

Teksystems

Contact Details:

Teksystems Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Full Stack Engineer - React/Java in London

Join Local Tech Meetups

Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Teksystems or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!

Contribute to Open Source Projects

Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Teksystems.

Tap into Online Developer Communities

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Explore Job Boards Specifically for Tech Roles

Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Teksystems that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!

We think you need these skills to ace Full Stack Engineer - React/Java in London

Java (Java 21 preferred)
Spring Framework (Spring 4+)
Spring Boot 3.x
REST APIs
Frontend technologies and frameworks (including version 17)
Web application architecture
SQL and relational databases (ideally PostgreSQL)

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Teksystems.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Teksystems and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

How to prepare for a job interview at Teksystems

Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Teksystems uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.