Kotlin/Java Developer in London

Kotlin/Java Developer in London

London Full-Time 60000 - 80000 £ / year (est.) Home office (partial)
Hydrogen UK Ltd

At a Glance

  • Tasks: Join a dynamic team to build scalable backend systems in the financial services sector.
  • Company: Major financial services programme with rapid growth and innovation.
  • Benefits: Hybrid working, competitive salary, and opportunities for professional development.
  • Other info: Collaborative Agile teams and excellent career growth potential await you.
  • Why this job: Make an impact in fintech by developing cutting-edge solutions for high-volume transactions.
  • Qualifications: Proven experience in Kotlin/Java and building scalable systems in regulated environments.

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

We’re supporting a major financial services programme that is scaling rapidly and looking to add several experienced backend engineers to the team.

We’re looking for strong Software Engineers with proven experience building scalable systems within regulated financial services environments.

Strong commercial experience with:

  • Kotlin
  • Java
  • Experience building scalable backend systems and microservices
  • Strong understanding of distributed systems and event-driven architecture
  • Previous experience working within Financial Services environments
  • Experience working within Agile engineering teams
  • Strong API and integration development experience

Desirable Experience:

  • Payments / payment gateway experience
  • Banking or fintech platforms
  • Kafka or messaging systems
  • AWS / Kubernetes / cloud-native environments
  • High-volume transactional systems
  • Settlement, reconciliation or transaction processing exposure

Tech Stack:

  • Java
  • Kotlin
  • Spring Boot
  • Kafka
  • Microservices
  • AWS / Kubernetes
  • REST APIs

London-based, Hybrid working (2–3 days onsite), Inside IR35. Strong communication and stakeholder engagement skills preferred.

We’re particularly interested in engineers who are comfortable working on complex, enterprise-scale systems within highly regulated environments.

Kotlin/Java Developer in London employer: Hydrogen UK Ltd

Join a leading financial services programme in London, where innovation meets opportunity. As a Kotlin/Java Developer, you'll thrive in a dynamic hybrid work environment that fosters collaboration and professional growth. With a strong focus on employee development, we offer access to cutting-edge technologies and the chance to work on complex, scalable systems that make a real impact in the fintech space.

Hydrogen UK Ltd

Contact Details:

Hydrogen UK Ltd Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Kotlin/Java Developer 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 Hydrogen UK Ltd 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 Hydrogen UK Ltd.

Tap into Online Developer Communities

Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Hydrogen UK Ltd.

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 Hydrogen UK Ltd 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 Kotlin/Java Developer in London

Kotlin
Java
Building Scalable Backend Systems
Microservices
Distributed Systems
Event-Driven Architecture
Agile Methodologies

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 Hydrogen UK Ltd.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Hydrogen UK Ltd 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 Hydrogen UK Ltd

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 Hydrogen UK Ltd 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.