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Flix
Kotlin Backend Engineer (FreelanceService Agreement)Flix • Kraków, Lesser Poland Voivodeship, Poland
Kotlin Backend Engineer (FreelanceService Agreement)

Kotlin Backend Engineer (FreelanceService Agreement)

Flix • Kraków, Lesser Poland Voivodeship, Poland
2 dni temu
Opis pracy

We are looking for a skilled Kotlin Backend Engineer for service agreement collaboration. B2B Sales & Distribution team builds and operates the backend platform powering Flixs partner-facing ecosystem including a self-management platform for partners a back office portal for internal users and an AI agentic bot supporting partner operations. The team is driving a significant modernization of its backend architecture and is working in an AI-native development environment.

Scope of services

  • 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

Relevant expertise

  • 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

Collaboration model

  • Cooperation based on a service agreement with independent delivery of agreed services and invoicing


Required Experience:

IC


Employment Type : Contract
Experience: years
Vacancy: 1

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Kotlin Backend Engineer (FreelanceService Agreement) • Kraków, Lesser Poland Voivodeship, Poland

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