At a Glance
- Tasks: Design and optimise high-performance Java systems for secure payment processing.
- Company: Fast-growing tech consultancy with a collaborative, opinionated culture.
- Benefits: Competitive salary, hybrid work model, and referral bonuses.
- Other info: Emphasis on engineering autonomy and clean code in a dynamic environment.
- Why this job: Join a diverse team shaping the future of business technology consulting.
- Qualifications: 10+ years in Java development with strong performance optimisation skills.
The predicted salary is between 50000 - 200000 £ per year.
Hello from RE Partners! 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 or US 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.
- 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.
- 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.
- Hybrid work model in London, UK.
- Collaborative, fast‑paced, and engineering‑driven culture.
- Emphasis on engineering autonomy, architectural decision‑making, and clean code.
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 EmployerWe 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.
Salary RangeThe base salary range for this role is $50,000–$200,000 per year. This is our good‑faith estimate at the time of posting. Actual base pay will depend on factors such as skills, experience, and location. This role may also be eligible for additional compensation (e.g., bonus/equity) and benefits, as applicable.
Principal Java Developer in London employer: RE Partners
At RE Partners, we pride ourselves on being a fast-growing business and technology consultancy that values innovation and collaboration. Our hybrid work model in London fosters a dynamic and engineering-driven culture, where employees are empowered to make architectural decisions and contribute to meaningful projects. With a strong focus on employee growth and a low attrition rate, we offer a supportive environment that encourages talent development and rewards excellence.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Java Developer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with online communities. 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 or GitHub repository showcasing your projects, especially those related to Java and microservices. This gives potential employers a taste of what you can do beyond your CV.
✨Tip Number 3
Prepare for interviews by practising common technical questions and coding challenges. Use platforms like LeetCode or HackerRank to sharpen your skills. Remember, confidence is key!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, it shows you’re genuinely interested in joining our team at RE Partners.
We think you need these skills to ace Principal Java Developer in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the Principal Java Developer role. Highlight your experience with Core Java, SpringBoot, and any relevant projects that showcase your skills in low-latency systems. We want to see how you fit into our fast-paced, opinionated culture!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Share your passion for performance and how your background aligns with our mission at RE Partners. Don’t forget to mention your experience with AWS and microservices – we love a good story about how you've tackled challenges.
Showcase Your Collaboration Skills:Since we thrive on collaboration, make sure to highlight your teamwork experiences. Talk about how you've worked with DevOps, Product, and QA teams in the past. We’re looking for someone who can drive architectural changes while mentoring peers!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any updates. Plus, it shows you’re keen on joining our global team at RE Partners!
How to prepare for a job interview at RE Partners
✨Know Your Java Inside Out
Make sure you brush up on your Core Java and SpringBoot skills. Be ready to discuss performance optimisation techniques and how you've applied them in past projects. They’ll want to see that you can not only code but also think critically about system performance.
✨Showcase Your Experience with Low-Latency Systems
Prepare specific examples of low-latency, high-throughput applications you've worked on. Be ready to explain the challenges you faced and how you overcame them. This will demonstrate your hands-on experience and problem-solving abilities in real-world scenarios.
✨Familiarise Yourself with Their Tech Stack
Get to know the tools and technologies mentioned in the job description, like Red Hat OpenShift, AWS services, and MongoDB. If you have experience with messaging systems like Kafka or RabbitMQ, be sure to highlight that too. Showing that you understand their environment will set you apart.
✨Emphasise Collaboration and Communication
Since this role involves working closely with DevOps, Product, and QA teams, be prepared to discuss how you’ve successfully collaborated in the past. Share examples of how you’ve mentored peers or driven architectural changes, as this aligns with their emphasis on teamwork and opinionated design.
