Kotlin Developer
New
Warszawa, -, Wrocław, -, Toruń, -, Antwerpia, -, Rotterdam, -, Warszawa, Country code: PLContractSenior
Salary3,360 - 7,560 EUR per hour
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Job Details
- Experience
- 5+ years
- Required Skills
- AWSDockerPostgreSQLDynamoDBJavaKotlinCI/CDMicroservicesGitHub Actions
Requirements
- 5+ years of professional backend development in Java and/or Kotlin
- Solid understanding of distributed systems design, microservice patterns, and event-driven architecture
- Hands-on production experience with AWS (ECS, Lambda, S3, RDS or DynamoDB)
- Experience with relational databases (PostgreSQL) and NoSQL (DynamoDB or similar)
- Strong command of Docker and containerized deployments
- Experience with CI/CD pipelines – we use GitHub Actions
- Clean code as a practice
- Genuine ability to self-direct and deliver
Responsibilities
- Design, build, and maintain JVM-based microservices (Java / Kotlin) running on AWS ECS, App Runner, and Lambda
- Work with a rich data layer including PostgreSQL, DynamoDB, RedShift, Redis, and S3
- Build and consume event-driven integrations via RabbitMQ and SNS
- Collaborate on API design across REST (API Gateway) and BFF patterns
- Instrument services with OpenTelemetry, Tempo, Prometheus, and Grafana
- Ship via GitHub Actions CI/CD pipelines with Docker and ECR
- Participate in architecture decisions and technical direction
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