Senior Software Engineer - Backend in London
Senior Software Engineer - Backend

Senior Software Engineer - Backend in London

London Full-Time 60000 - 80000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Build innovative billing features and develop AI-powered workflows for modern companies.
  • Company: Fast-growing B2B FinTech with a small, impactful team.
  • Benefits: Competitive salary, flexible work environment, and opportunities for professional growth.
  • Why this job: Shape core architecture and tackle deep engineering challenges in a dynamic setting.
  • Qualifications: Strong backend experience and comfort with distributed systems; Kotlin knowledge is a plus.
  • Other info: Join a team where your contributions directly impact revenue-critical infrastructure.

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

We’re working with a fast-growing B2B FinTech building billing infrastructure for modern companies. Small team, high ownership, and real impact, you’ll shape both the product and core architecture.

What You’ll Work On

  • Build end-to-end product features used daily
  • Develop AI-powered workflows for approvals and collections
  • Design systems handling high-volume event streams
  • Scale billing infrastructure to handle 10x growth
  • Own revenue-critical systems where reliability matters

What You’ll Need

  • Strong backend experience across any language and be happy to work with Kotlin moving forwards
  • Experience with distributed systems
  • Focus on reliability and performance
  • Comfortable in fast-moving, ambiguous environments

Tech

  • Kotlin, Postgres, GCP
  • Event-driven systems
  • React, TypeScript

Why It’s Interesting

  • Revenue-critical infrastructure
  • Real ownership in a small team
  • Strong mix of product + deep engineering challenges

Senior Software Engineer - Backend in London employer: Atarus

Join a dynamic and innovative FinTech company where your contributions as a Senior Backend Engineer will directly influence the development of cutting-edge billing infrastructure. With a strong emphasis on employee growth, a collaborative work culture, and the opportunity to tackle complex engineering challenges, you'll thrive in an environment that values high ownership and impactful work. Located in a vibrant tech hub, this role offers you the chance to be part of a small, agile team dedicated to shaping the future of financial technology.
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Contact Detail:

Atarus Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Software Engineer - Backend in London

✨Tip Number 1

Network like a pro! Reach out to folks in the FinTech space, especially those who work with billing infrastructure. A friendly chat can open doors and give you insights that job descriptions just can't.

✨Tip Number 2

Show off your skills! If you've built any cool projects or have experience with Kotlin, make sure to highlight that in conversations. Real-world examples can set you apart from the crowd.

✨Tip Number 3

Prepare for technical chats! Brush up on distributed systems and event-driven architectures. Being able to discuss these topics confidently will show you're ready for the challenges ahead.

✨Tip Number 4

Apply through our website! It’s the best way to get noticed. Plus, we love seeing candidates who take the initiative to connect directly with us.

We think you need these skills to ace Senior Software Engineer - Backend in London

Backend Development
Kotlin
Distributed Systems
Reliability Engineering
Performance Optimisation
Event-Driven Systems
Postgres
Google Cloud Platform (GCP)
Adaptability in Ambiguous Environments
Product Development
Team Collaboration
Problem-Solving Skills

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 backend experience, especially with Kotlin, and any work you've done with distributed systems.

Craft a Compelling Cover Letter: Use your cover letter to tell us why you're excited about working in FinTech and how you can contribute to our team. Share specific examples of past projects that demonstrate your ability to handle high-volume event streams and focus on reliability.

Showcase Your Problem-Solving Skills: In your application, give us a glimpse of how you tackle challenges. Discuss any complex problems you've solved in fast-moving environments, especially those related to performance and scalability.

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 important updates from our team!

How to prepare for a job interview at Atarus

✨Know Your Tech Stack

Make sure you’re well-versed in the technologies mentioned in the job description, especially Kotlin, Postgres, and GCP. Brush up on your knowledge of event-driven systems and be ready to discuss how you've used these technologies in past projects.

✨Showcase Your Problem-Solving Skills

Prepare to discuss specific challenges you've faced in backend development, particularly in high-volume environments. Think about how you approached these problems and what solutions you implemented, as this will demonstrate your reliability and performance focus.

✨Emphasise Ownership and Impact

Since this role involves real ownership, be ready to share examples of how you've taken charge of projects or features in previous roles. Highlight any instances where your contributions had a significant impact on the product or team.

✨Be Ready for Ambiguity

This company thrives in fast-moving, ambiguous environments, so prepare to discuss how you handle uncertainty. Share experiences where you successfully navigated unclear situations and still delivered results, showcasing your adaptability and resilience.

Senior Software Engineer - Backend in London
Atarus
Location: London

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