Lead Java Engineer in London

Lead Java Engineer in London

London Full-Time 70000 - 90000 € / year (est.) No home office possible
Deepstreamtech

At a Glance

  • Tasks: Design and develop high-performance Java services for critical financial systems.
  • Company: Join a leading tech firm focused on anti-money laundering and financial crime prevention.
  • Benefits: Competitive salary, flexible working options, and opportunities for professional growth.
  • Other info: Collaborative environment with a focus on innovation and continuous improvement.
  • Why this job: Be a key player in shaping the future of secure financial technology.
  • Qualifications: Strong Java skills and experience with modern backend architectures required.

The predicted salary is between 70000 - 90000 € per year.

Requirements

  • Strong Java Expertise: Proven experience building backend systems using Java and frameworks such as Spring / Spring Boot, with deep understanding of the JVM ecosystem.
  • Event & Message‑Driven Design: Experience designing systems using messaging and event‑driven approaches (e.g. Kafka or similar technologies), with a solid grounding in Domain‑Driven Design.
  • Engineering Fundamentals: Strong grasp of SOLID principles, design patterns, dependency injection and persistence technologies (JPA/Hibernate).
  • Problem‑Solving Mindset: Solid knowledge of algorithms and data structures, with the ability to reason about performance, complexity and scalability.
  • Data Awareness: Experience working with both SQL and NoSQL data stores, understanding query patterns, indexing strategies and trade‑offs.
  • Cloud‑Ready Development: Experience building software for cloud environments, including containerisation (Docker, Kubernetes) and modern deployment practices.
  • Quality & Resilience Focus: Understanding of secure coding practices, fault tolerance and building reliable systems in distributed environments.
  • Collaboration & Influence: Comfortable working with other engineers, sharing ideas clearly and contributing positively to team discussions.
  • (Desirable) Experience with reactive or asynchronous programming models.
  • (Desirable) Exposure to API technologies such as GraphQL, gRPC or API gateway patterns.
  • (Desirable) Interest or experience in AI‑assisted development or agent‑based frameworks (e.g. LangChain4j or similar).
  • (Desirable) Contributions to open‑source projects, technical blogs, or a strong interest in staying current with the Java ecosystem.

What the job involves

This role sits within our Risk Intelligence division, an area responsible for delivering critical services that support anti‑money laundering and financial crime prevention across global markets. We’re looking for a Lead Java Engineer to join our growing Nottingham‑based engineering team. This is a hands‑on role for a Java expert who enjoys building high‑quality backend systems, shaping technical direction, and working with modern, message and event‑driven architectures. You’ll play a key role in designing, building and evolving core services, working closely with other senior engineers and architects. While you’ll have influence over technical decisions, this role is firmly rooted in delivery — ideal for someone who loves writing code, solving complex problems, and continuously raising engineering standards.

  • Hands‑On Engineering: Designing, developing and maintaining high‑performance Java services that are scalable, secure and resilient.
  • Modern Backend Design: Applying Domain‑Driven Design and message‑/event‑driven design principles to build loosely coupled, well‑structured systems.
  • Code Quality & Craftsmanship: Writing clean, maintainable code and contributing to peer reviews, championing best practices and continuous improvement.
  • System Evolution: Helping modernise and evolve existing platforms, balancing pragmatic delivery with long‑term architectural health.
  • Collaboration: Working closely with product managers, architects and fellow engineers to turn complex business requirements into robust technical solutions.
  • Developer Experience: Contributing to improvements in build tooling, CI/CD pipelines, testing approaches and overall engineering productivity.
  • Operational Excellence: Supporting systems in production, improving observability, performance and resilience.

Lead Java Engineer in London employer: Deepstreamtech

As a Lead Java Engineer in our Nottingham-based Risk Intelligence division, you'll be part of a dynamic team dedicated to combating financial crime through innovative technology. We pride ourselves on fostering a collaborative work culture that encourages continuous learning and professional growth, offering opportunities to influence technical direction while working with cutting-edge technologies. Our commitment to quality and resilience ensures that you will be engaged in meaningful projects that not only challenge your skills but also contribute to the greater good.

Deepstreamtech

Contact Detail:

Deepstreamtech Recruiting Team

StudySmarter Expert Advice🤫

We think this is how you could land Lead Java Engineer in London

Tip Number 1

Network like a pro! Reach out to your connections in the industry, attend meetups, and engage in online forums. You never know who might have the inside scoop on job openings or can refer you directly.

Tip Number 2

Show off your skills! Create a portfolio showcasing your Java projects, especially those involving Spring Boot or event-driven architectures. This gives potential employers a taste of what you can do beyond your CV.

Tip Number 3

Prepare for technical interviews by brushing up on algorithms, data structures, and design patterns. Practise coding challenges on platforms like LeetCode or HackerRank to sharpen your problem-solving skills.

Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.

We think you need these skills to ace Lead Java Engineer in London

Java Expertise
Spring Framework
Spring Boot
JVM Ecosystem
Event-Driven Design
Messaging Technologies (e.g. Kafka)
Domain-Driven Design

Some tips for your application 🫡

Show Off Your Java Skills:Make sure to highlight your strong Java expertise in your application. Talk about your experience with frameworks like Spring or Spring Boot, and don’t forget to mention any cool projects you've worked on that showcase your backend development skills.

Talk About Your Problem-Solving Mindset:We love a good problem solver! In your application, share examples of how you've tackled complex challenges using algorithms and data structures. This will show us that you can think critically and deliver high-quality solutions.

Demonstrate Your Collaboration Skills:Since this role involves working closely with other engineers, make sure to mention your teamwork experiences. Share how you've contributed to team discussions and collaborated on projects, as we value positive contributions to our engineering culture.

Apply Through Our Website:Don’t forget to apply through our website! It’s the best way for us to receive your application and get to know you better. We’re excited to see what you bring to the table!

How to prepare for a job interview at Deepstreamtech

Show Off Your Java Skills

Make sure to highlight your strong Java expertise during the interview. Be prepared to discuss specific projects where you've built backend systems using Java and frameworks like Spring or Spring Boot. Share examples that demonstrate your deep understanding of the JVM ecosystem.

Talk About Event-Driven Design

Since the role involves designing systems with messaging and event-driven approaches, come ready to discuss your experience with technologies like Kafka. Explain how you've applied Domain-Driven Design in your previous work and be ready to tackle any scenario-based questions on this topic.

Demonstrate Problem-Solving Skills

Expect to face questions that assess your problem-solving mindset. Brush up on algorithms and data structures, and be prepared to reason about performance, complexity, and scalability. Practising coding challenges can help you articulate your thought process clearly.

Emphasise Collaboration and Communication

This role requires working closely with other engineers and product managers, so showcase your collaboration skills. Prepare examples of how you've contributed positively to team discussions and shared ideas effectively. Highlight any experiences where you’ve influenced technical decisions in a team setting.