vom 28.07.2026
We are looking for a skilled Kotlin Backend Engineer for service agreement collaboration.
Tasks: Independent delivery of backend services in Kotlin and Spring Boot, including design, development, and maintenance. Building and maintaining REST APIs used by internal and external partners. Contributing to architectural decisions and technical modernization initiatives as a senior topic driver. Improving observability, performance, and reliability of backend systems using DataDog. Supporting CI/CD pipelines and cloud infrastructure on AWS and Kubernetes. Working within an AI-native development environment, including CI-integrated code review automation and an internal Claude Code plugin marketplace covering Kotlin/Spring Boot conventions, architectural patterns, testing practices, and database guidelines. Sharing Kotlin expertise and best practices with existing engineers on the Flix team who are transitioning from other languages, through code review, pairing, and technical guidance.
Skills: 4+ years of software engineering experience, primarily backend development with a JVM language, including some commercial experience with Kotlin. Hands-on Spring Boot experience. Experience building and maintaining REST APIs and distributed systems. Solid SQL knowledge and relational database design, including MySQL and PostgreSQL. Sound software engineering fundamentals and clean code practices. Clear written and spoken English communication skills. Preferred experience with: AWS, Kubernetes, GitLab CI/CD, Kafka, Terraform, LLM integrations, RAG systems, AI product development, or legacy system migration experience.
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