Java/Kotlin Developer | Hybrid, London | Inside IR35

Java/Kotlin Developer | Hybrid, London | Inside IR35

London Full-Time 63000 - 77000 £ / year (est.) Hybrid
K

At a Glance

  • Tasks: Design and develop high-performing APIs for mobile applications while collaborating with cross-functional teams.
  • Company: Join a leading tech firm in London with a hybrid work model.
  • Benefits: Enjoy competitive pay, flexible working, and opportunities for professional growth.
  • Other info: Be part of a dynamic team focused on continuous improvement and modernisation.
  • Why this job: Make an impact by enhancing user experiences through innovative backend solutions.
  • Qualifications: Experience in Kotlin or Java, with strong backend development skills.

The predicted salary is between 63000 - 77000 £ per year.

Design, develop, and maintain the mobile service layer (Backend-for-Frontend) supporting large-scale mobile applications.

Deliver secure, reliable, and high-performing Server Side APIs for Real Time consumer experiences.

Write clean, maintainable code and contribute to code reviews, refactoring, and continuous improvement initiatives.

Collaborate with mobile, product, and design teams to define solutions that enhance usability and functionality.

Troubleshoot and optimize application performance for responsiveness and scalability.

Create robust unit tests and integration tests to ensure software reliability.

Manage asynchronous processing, error handling, and performance optimization in distributed systems.

Support Legacy system integrations and modernize existing codebases when required.

Follow CI/CD best practices and contribute to team development pipelines and build systems.

Actively share ideas, propose improvements, and participate in solution design discussions.

Proven experience: building Server Side applications with strong understanding of modern Back End development practices.

Proficiency in: Kotlin or related JVM languages (Java, Scala, etc.).

Practical knowledge of: RESTful and GraphQL (GQL) API design and integration.

Hands-on experience with: Gradle or similar build tools.

Solid understanding of: asynchronous programming, thread management, and performance optimization.

Experience working with: CI/CD pipelines and automated testing frameworks.

Strong debugging and problem-solving skills: with attention to system scalability and maintainability.

Nice to Have Skills:

  • Experience designing or integrating RAML-based documentation into API workflows.
  • Familiarity with Legacy system modernization or integration within enterprise environments.
  • Understanding of cloud-native development patterns or containerized deployment workflows (e.g., Docker, Kubernetes).

Java/Kotlin Developer | Hybrid, London | Inside IR35 employer: Korn Ferry Group

Join a forward-thinking organisation in London as the Interim Head of Enterprise Architecture, where you will play a pivotal role in shaping the future of technology and business strategy. With a strong emphasis on employee growth, collaboration, and innovation, this company fosters a dynamic work culture that values strategic leadership and technical expertise. Enjoy the unique advantage of a hybrid working model, allowing for flexibility while engaging directly with senior stakeholders to drive meaningful transformation.

K

Contact Details:

Korn Ferry Group Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Java/Kotlin Developer | Hybrid, London | Inside IR35

✨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 Korn Ferry Group 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 Korn Ferry Group.

✨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 Korn Ferry Group.

✨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 Korn Ferry Group 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 Java/Kotlin Developer | Hybrid, London | Inside IR35

Java
Kotlin
Backend-for-Frontend
Server Side APIs
RESTful API design
GraphQL (GQL) integration
Gradle

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 Korn Ferry Group.

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

✨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 Korn Ferry Group 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.