Senior Principal Java Engineer - Financial Systems in Luton

Senior Principal Java Engineer - Financial Systems in Luton

Luton Full-Time 60000 - 80000 £ / year (est.) Home office (partial)
RE Partners

At a Glance

  • Tasks: Design and optimise high-performance Java systems for secure payment processing.
  • Company: Fast-growing tech consultancy with a collaborative and opinionated culture.
  • Benefits: Hybrid work model, competitive salary, and a supportive environment for career growth.
  • Other info: Diverse, woman-owned company with a low attrition rate and referral bonuses.
  • Why this job: Join a dynamic team and make a real impact in the financial technology space.
  • Qualifications: 10 years of Java experience, strong performance optimisation skills, and cloud expertise.

The predicted salary is between 60000 - 80000 £ per year.

Hello from RE Partners! Who We Are: We are a fast growing business and technology consultant company co-founded in 2019. We offer a custom-tailored, white-glove engineering service fit for our clients, because a digital transformation is more than just technology. With a successful track record of being a preferred vendor for Fortune 500 companies and as a trusted partner for some of the industry’s leading companies, our global talent has helped many clients achieve their goals.

We are seeking an experienced and opinionated Principal Java Engineer to join our high-performing engineering team, working on low latency, high-throughput systems in the payments processing domain. This hybrid role is based in the UK and offers the opportunity to build scalable, real-time services using modern technologies. If you’re passionate about performance, have strong Core Java and SpringBoot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you.

Key Responsibilities:
  • Design, develop, and optimize low-latency, high-throughput backend systems using Java.
  • Build and maintain RESTful APIs and microservices that power secure payment workflows.
  • Work with messaging standards and protocols commonly used in financial transactions.
  • Deploy, monitor, and scale applications in Red Hat OpenShift and AWS cloud environments.
  • Integrate with MongoDB and other NoSQL/SQL datastores for real-time data management.
  • Collaborate with DevOps, Product, and QA teams to ensure production-grade solutions.
  • Drive architectural changes, advocate for best practices, and provide mentorship to peers.
  • Drive performance tuning, fault tolerance, and observability improvements across services.
Required Skills & Experience:
  • 10 years of experience in Java development with a focus on performance and memory optimization.
  • Proficient in Mongo, Spring and microservice-based architecture.
  • Proven experience with low-latency, high-throughput applications (sub-millisecond response times a plus).
  • Hands-on experience deploying applications on Red Hat OpenShift and/or Kubernetes.
  • Strong cloud experience with AWS services such as ECS, EKS, Lambda, S3, etc.
  • Strong communication skills and a bias toward action and opinionated design decisions.
Nice to Have:
  • Familiarity with messaging systems (Kafka, RabbitMQ, etc.)
  • Prior experience in Payments Processing, financial services, or banking systems.
  • Exposure to container security and performance tuning on OpenShift.
  • Knowledge of payment gateways, ISO 20022, or SWIFT formats.
Location & Work Environment:
  • Hybrid work model in London, UK.
  • Collaborative, fast-paced, and engineering-driven culture.
  • Emphasis on engineering autonomy, architectural decision-making, and clean code.

Join Our Global Team: We invite you to apply for the position at RE Partners. Join us in shaping the future of business technology consulting and transforming the way organizations thrive in a digital world. As a diverse, woman-owned global business, we pride ourselves on keeping talent happy – our 7% attrition rate speaks volumes. Bring your talented friends along and earn a referral bonus.

Equal Opportunity Employer: We are an equal opportunity employer and welcome applications from all qualified individuals regardless of race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, or veteran status.

Senior Principal Java Engineer - Financial Systems in Luton employer: RE Partners

At RE Partners, we pride ourselves on being a dynamic and inclusive employer that champions engineering excellence and innovation. Our hybrid work model in London fosters a collaborative environment where your contributions are valued, and you have the autonomy to drive architectural decisions. With a strong focus on employee growth and a remarkable 7% attrition rate, we offer a rewarding career path for those passionate about technology and looking to make a meaningful impact in the financial systems domain.

RE Partners

Contact Details:

RE Partners Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Principal Java Engineer - Financial Systems in Luton

Tap into Campus Networks

If you're still in uni, don’t forget to engage with your campus's career services and attend finance-related events. Banks often do presentations and recruitment drives on campus, so put yourself out there and make use of these opportunities to show off your passion for the field.

Get Certified

Consider pursuing relevant certifications like the CFA or ACCA while you’re job hunting. They not only beef up your CV but also connect you with professional bodies which can lead to networking opportunities and even job openings in banking and financial services.

Connect on Professional Platforms

Join finance-focused groups on platforms like LinkedIn and engage in discussions. This can really help you stand out from the crowd, allowing potential employers to see your knowledge and interest in industry trends. Plus, you might stumble upon job postings shared exclusively within the group.

Apply Directly and Be Proactive

Don’t shy away from reaching out directly to firms like RE Partners. Use their websites and apply through them, but also consider following up with a polite email to express your enthusiasm. Being proactive can make a huge difference in getting noticed in the competitive financial services sector.

We think you need these skills to ace Senior Principal Java Engineer - Financial Systems in Luton

Core Java
SpringBoot
Low-Latency Systems
High-Throughput Applications
RESTful APIs
Microservices Architecture
Red Hat OpenShift

Some tips for your application 🫡

Show Off Your Numbers!:In the banking and financial services world, quantifiable achievements are key. Make sure your CV highlights your grades in relevant subjects, any financial certifications you hold, and specific projects where you've delivered measurable results. Employers love to see how your skills translate into real-world success.

Tailor Your Cover Letter to the Role:When applying for a full-time position, your cover letter should make a direct connection between your experience and the job description. Don't just state your enthusiasm for finance—dive into how your background in banking or financial analysis sets you apart. Let your passion shine through while being specific about what you can bring to RE Partners.

Include Relevant Financial Software Experience:If you've worked with financial modelling tools or software like Excel, SAP, or specific analytical tools during your studies or internships, bring that up! Highlighting your proficiency can really make your application pop and show you're ready to hit the ground running in a full-time role.

Research and Reflect:Before hitting that 'apply' button on RE Partners's website, do a little digging. Look up their recent projects, values, and culture. Reflecting their ethos in your application can make a huge difference and show you’re genuinely interested in being part of the team!

How to prepare for a job interview at RE Partners

Brush Up on Financial Analysis Skills

Make sure you're well-versed in financial concepts and analytical techniques relevant to banking and financial services. Get comfortable with tools like Excel for modelling or financial forecasting, as technical questions in this area are common during interviews with RE Partners.

Prepare for Case Studies

Expect to tackle case studies that demonstrate your problem-solving skills in real-world banking scenarios. Familiarise yourself with the types of problems you might face—think risk assessments or investment evaluations—and be ready to articulate your thought process clearly.

Show Your Passion for Finance

Since this is a full-time position, employers at RE Partners will be keen to see your genuine interest in finance. Be prepared to discuss recent industry trends or news articles that excite you, showcasing your enthusiasm and engagement with the field.

Network with Industry Professionals

Before your interview, reach out to current or former RE Partners employees on platforms like LinkedIn. They'll offer unique insights into the company's culture and the interview process, which can give us a delightful edge in showcasing a good fit for the team.