At a Glance
- Tasks: Design, build, and support backend features for a cutting-edge SaaS product.
- Company: Join WireMock, the industry leader in API environment simulation.
- Benefits: Competitive salary, hybrid work model, and opportunities for professional growth.
- Other info: Contribute to open source and engage with a vibrant tech community.
- Why this job: Be part of a dynamic team shaping the future of software development with AI integration.
- Qualifications: 6+ years in software development, proficient in Java/Kotlin, and experience with AI coding tools.
The predicted salary is between 80000 - 110000 £ per year.
WireMock is the industry standard for API environment simulation. With a massive global open-source footprint and deep adoption across the Fortune 500, we provide the critical infrastructure that engineering teams use to de-couple development from fragile dependencies. As AI agents and LLM-integrated apps redefine the SDLC lifecycle, WireMock is building the simulation layer required to develop, test, and onboard at the speed of autonomous code. We’re leveraging our massive OSS pedigree to scale a SaaS/Cloud platform that handles the complexity of the modern, distributed enterprise.
The company is spread between the UK, California and the US east coast, with the engineering team based in London. This position will be hybrid and you will be required to arrive two days a week to the London office.
We’re looking for someone who:
- Wants to work in a small, dynamic team
- Likes working in a product-driven engineering environment, wearing multiple hats and actively contributing to product design.
- Has integrated AI coding tools into their workflow, but can reason and function without them where necessary.
- Cares about user delight over technical purity.
- Writes code in Java, Kotlin and ideally Javascript.
- Enjoys contributing to open source, including writing and speaking.
- Proactively improves their own skills and understanding of the domain they’re working in.
Salary range £80k-110k.
We’re looking for a Java/Kotlin developer who has a solid understanding of networking and HTTP, experience building complex web applications and an eye for quality balanced by pragmatism about delivery. The right candidate will have a disciplined approach to code quality and be comfortable using TDD, trunk-based development and continuous integration/delivery practices. They’ll also have the desire to gain a deep understanding of the product and its customers, and the ability to contribute to product design decisions. They’ll also want to write and speak to our community about the product, API mocking and related topics.
Responsibilities include:
- Design, build, test and support backend features in the commercial SaaS product.
- Create, maintain and support cloud infrastructure.
- Write documentation, contribute to article/tutorial content.
- Embed AI processes and usage across the SDLC.
- Contribute to the WireMock open source projects.
- Help customers and community members with technical queries.
- On call out-of-hours, approximately one week in every six.
Requirements:
- At least 6 years professional software development experience, of which the majority should be in Java or another JVM language.
- Recently written production code in Kotlin.
- Demonstrable experience using AI coding agents such as Claude Code, GitHub Copilot or Cursor on real projects.
- Solid understanding of TCP/IP and HTTP.
- Solid understanding of RESTful API design.
- Experience working at least one mainstream SQL database in a production application.
- Basic familiarity with Docker.
- Fluent spoken and written English.
- Able to work autonomously and take initiative when remote.
- UK based and required to work in London 2 days per week.
Nice-to-haves:
- Experience developing against AWS services – ECS, EC2 and RDS in particular.
- Experience managing cloud infrastructure via configuration-as-code.
- Front end development experience - HTML, CSS and Javascript.
- Experience with gRPC, GraphQL or websockets development.
Please only direct candidates, no recruiters.
Senior Backend Engineer employer: WireMock
WireMock is an excellent employer that fosters a collaborative and innovative work culture, particularly for Senior Backend Engineers passionate about AI technologies. With a competitive salary range of £80k to £110k and the flexibility of a hybrid working model in London, employees benefit from a supportive environment that encourages professional growth and contributions to open-source projects, making it a rewarding place to advance your career.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Backend Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A personal connection can often get you a foot in the door faster than any application.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those using Java, Kotlin, or AI tools. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews by practising common technical questions and coding challenges. We recommend doing mock interviews with friends or using platforms that simulate real interview scenarios.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Senior Backend Engineer
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that match the Senior Backend Engineer role. Highlight your Java and Kotlin experience, as well as any work with AI coding tools. We want to see how you fit into our dynamic team!
Craft a Compelling Cover Letter:Your cover letter is your chance to show us your personality and passion for the role. Share why you're excited about working at WireMock and how you can contribute to our product-driven environment. Let us know what user delight means to you!
Showcase Your Open Source Contributions:If you've contributed to open source projects, make sure to mention them! We love seeing candidates who are active in the community. It shows your commitment to quality and collaboration, which are key values for us.
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’re considered for the role. Plus, it makes the process smoother for everyone involved!
How to prepare for a job interview at WireMock
✨Know Your Tech Stack
Make sure you’re well-versed in Java, Kotlin, and ideally JavaScript. Brush up on your understanding of TCP/IP, HTTP, and RESTful API design. Being able to discuss your experience with these technologies confidently will show that you’re a strong fit for the role.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous projects, especially those involving AI coding tools or cloud infrastructure. Highlight how you approached these problems and what solutions you implemented, as this will demonstrate your ability to think critically and adapt.
✨Emphasise Collaboration and Communication
Since the role involves working in a small, dynamic team, be ready to talk about your experiences collaborating with others. Share examples of how you’ve contributed to product design or helped teammates, as well as any community engagement like writing or speaking about your work.
✨Understand the Company Culture
Research WireMock and its open-source contributions. Familiarise yourself with their products and the importance of user delight over technical purity. Showing that you align with their values and mission will make a positive impression during the interview.
