Senior Backend Kotlin Developer (AWS)
Salary: Up to £130,000
Location: London (Hybrid – 2 days per week in office)
Experience: 8+ years
The Role
We’re looking for a highly experienced Senior Backend Kotlin Developer to join our growing engineering team. You’ll play a key role in designing, building, and scaling robust backend systems that power mission-critical products, working closely with product, frontend, and DevOps teams.
This is a hands-on senior role with real technical influence, ideal for someone who enjoys solving complex problems and shaping backend architecture in a cloud-native environment.
What You’ll Be Doing
* Designing, developing, and maintaining high-performance backend services using Kotlin
* Building and operating scalable systems on AWS
* Contributing to system architecture and technical decision-making
* Writing clean, maintainable, and well-tested code
* Improving reliability, performance, and security across backend services
* Mentoring junior engineers and promoting best engineering practices
* Collaborating with cross-functional teams to deliver high-quality solutions
What We’re Looking For
* 8+ years of professional backend development experience
* Strong commercial experience with Kotlin (or Java with deep Kotlin exposure)
* Solid experience designing and operating systems on AWS
* Experience with microservices, REST APIs, and event-driven architectures
* Strong understanding of databases (SQL and/or NoSQL)
* Experience with CI/CD pipelines and modern DevOps practices
* Excellent problem-solving and communication skills
* Comfortable working in a hybrid London-based setup (2 days/week)
Nice to Have
* Experience with containers (Docker, Kubernetes)
* Knowledge of infrastructure as code (Terraform, CloudFormation)
* Experience in high-scale or high-availability systems
* Exposure to domain-driven design or distributed systems