Senior Kotlin Engineer in London

Senior Kotlin Engineer in London

London Full-Time 60000 - 80000 € / year (est.) Home office (partial)
Globawise Group

At a Glance

  • Tasks: Develop high-performance backend services in Kotlin and shape architectural decisions.
  • Company: Globawise, a leading UK FinTech redefining lending and credit infrastructure.
  • Benefits: Competitive salary, hybrid work model, and opportunities for professional growth.
  • Other info: Dynamic environment with a focus on continuous improvement and architectural ownership.
  • Why this job: Join a collaborative team and make a real impact in the FinTech space.
  • Qualifications: Strong Kotlin experience and ability to write clean, maintainable code.

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

At Globawise, we empower technologists to thrive by connecting them with roles that deliver both impact and long-term growth. We’re partnering with a high-performing UK FinTech that continues to redefine modern lending and credit infrastructure. Backed by strong market success and ongoing product expansion across the UK and US, their engineering team - now 80+ strong - is building the next generation of financial products, including lending platforms, credit cards, auto-finance solutions, and new launches planned for this year.

As a Senior Kotlin Engineer, you’ll join a newly forming pod with the opportunity to influence architectural decisions, shape design discussions, and help deliver elegant solutions to complex financial challenges. This is a role for an engineer who not only writes clean, idiomatic Kotlin but also elevates those around them through collaboration and thoughtful technical leadership.

What You’ll Do
  • Develop and maintain high-performance backend services in Kotlin, contributing to APIs, internal tooling, and new product capabilities.
  • Shape Architecture & Engineering Standards: Participate in collaborative design forums across engineering and business teams, influencing architectural decisions and system evolution.
  • Support Product Expansion: Build and integrate APIs supporting collections functionality, new financial products, and US market expansion.
  • Write Clean, Tested Code: Deliver simple, maintainable, well-tested code across all layers of the testing pyramid using modern Kotlin testing frameworks.
  • Collaborate Across the Business: Work closely with stakeholders across product, operations, and engineering to deeply understand complex financial domains and translate them into scalable systems.
Who You Are
  • You write elegant, idiomatic Kotlin and value simplicity in design.
  • You understand that great engineering is about people, not just code.
  • You’re comfortable navigating complex financial domains and abstract system design.
  • You think critically about architecture and understand trade-offs between quality and speed.
  • You’re collaborative, pragmatic, and motivated to continuously improve yourself and your team.
  • You can solve problems independently but know when to involve others.
Tech Stack You’ll Work With
  • Kotlin (1.7+)
  • AWS
  • GraphQL (nice to have)
  • Frontend Ecosystem (Context Awareness): React & React Native, TypeScript, Gradle, JUnit Jupiter, Kotest, TestContainers
QualificationsMust-Have
  • Strong commercial experience with Kotlin
  • Ability to write clean, simple, maintainable code
  • Solid experience with relational databases (PostgreSQL or similar)
  • Understanding of software architecture and abstraction principles
  • Experience writing comprehensive automated tests
  • Ability to understand and work within complex financial domains
Nice-to-Have
  • Experience with NoSQL databases
  • Familiarity with GraphQL
  • Experience working in FinTech or regulated environments
  • Experience with Kanban or flow-based agile methodologies
What We Offer
  • Top-Tier Compensation – Competitive salary and benefits aligned with your experience.
  • High-Impact Work – Help scale one of the UK’s most successful FinTech platforms.
  • Collaborative Culture – Join a team that values alignment, shared learning, and strong relationships.
  • Professional Growth – Work in an environment that encourages continuous improvement and architectural ownership.
  • Hybrid Flexibility – A balanced working model supporting both collaboration and focused deep work.

Ready to Engineer the Future of FinTech? If you enjoy solving complex domain challenges, shaping architecture, and writing elegant Kotlin in a high-trust engineering culture – we’d love to meet you. Apply now and let’s build something exceptional together.

Senior Kotlin Engineer in London employer: Globawise Group

At Globawise, we pride ourselves on being an exceptional employer that empowers our technologists to thrive in a collaborative and innovative environment. As a Senior Kotlin Engineer, you will not only contribute to high-impact projects within a leading UK FinTech but also enjoy top-tier compensation, professional growth opportunities, and a flexible hybrid working model that fosters both teamwork and individual focus. Join us to shape the future of financial technology while elevating your career in a culture that values simplicity, collaboration, and continuous improvement.

Globawise Group

Contact Detail:

Globawise Group Recruiting Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Kotlin Engineer in London

Tip Number 1

Network like a pro! Reach out to your connections in the FinTech space, especially those who might know someone at Globawise. A personal introduction can make all the difference in getting your foot in the door.

Tip Number 2

Show off your skills! If you’ve got a GitHub or portfolio showcasing your Kotlin projects, make sure to share it during interviews. It’s a great way to demonstrate your coding prowess and passion for clean, maintainable code.

Tip Number 3

Prepare for technical discussions! Brush up on your knowledge of software architecture and financial domains. Being able to discuss trade-offs and design decisions will show that you’re not just a coder, but a thoughtful engineer.

Tip Number 4

Apply through our website! We love seeing candidates who take the initiative. Plus, it helps us keep track of your application and ensures you’re considered for the role. Let’s build something exceptional together!

We think you need these skills to ace Senior Kotlin Engineer in London

Kotlin (1.7+)
API Development
Backend Services Development
Software Architecture
Automated Testing
Relational Databases (PostgreSQL or similar)
Collaboration Skills

Some tips for your application 🫡

Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the Senior Kotlin Engineer role. Highlight your Kotlin expertise and any relevant projects you've worked on, especially in FinTech.

Craft a Compelling Cover Letter:Use your cover letter to tell us why you're passionate about this role and how you can contribute to our team. Share specific examples of your work that demonstrate your ability to write clean, maintainable code and collaborate effectively.

Showcase Your Problem-Solving Skills:In your application, mention instances where you've tackled complex challenges, particularly in financial domains. We want to see how you think critically about architecture and make trade-offs between quality and speed.

Apply Through Our Website:We encourage you to apply directly through our website for a smoother process. This way, we can ensure your application gets the attention it deserves and you can easily track your progress!

How to prepare for a job interview at Globawise Group

Know Your Kotlin Inside Out

Make sure you brush up on your Kotlin skills before the interview. Be ready to discuss idiomatic Kotlin, clean code practices, and how you've applied these in past projects. They’ll likely want to see your understanding of modern testing frameworks too, so be prepared to talk about your experience with JUnit Jupiter or Kotest.

Understand the FinTech Landscape

Since this role is in a FinTech environment, it’s crucial to have a grasp of the financial domain. Research current trends in lending and credit infrastructure, and think about how your technical skills can solve real-world financial challenges. This will show that you’re not just a coder but someone who understands the impact of their work.

Prepare for Collaborative Discussions

This position involves a lot of collaboration, so be ready to discuss how you’ve worked with cross-functional teams in the past. Think of examples where you influenced architectural decisions or contributed to design discussions. Highlight your ability to communicate complex ideas clearly and how you’ve helped elevate your team.

Showcase Your Problem-Solving Skills

Be prepared to tackle some technical problems during the interview. They might ask you to solve a coding challenge or discuss how you would approach a specific architectural decision. Use this opportunity to demonstrate your critical thinking and how you balance quality with speed in your solutions.