kotlin backend developer

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• Develop and maintain backend services and RESTful APIs using Kotlin (Ktor or Spring Boot);
• Design and implement microservices architecture with inter-service communication patterns;
• Design and optimize database schemas for PostgreSQL/MongoDB and implement caching (Redis);
• Integrate message brokers (Kafka, RabbitMQ) for asynchronous and event-driven processing;
• Implement authentication/authorization (JWT, OAuth2) and write clean, documented code;
• Containerize applications with Docker, orchestrate with Kubernetes, and configure CI/CD;
• Write unit and integration tests (JUnit, MockK) and optimize performance;
• Collaborate with mobile/frontend teams on API contracts and participate in code reviews.

• 3+ Years of commercial backend development with Kotlin;
• Strong Kotlin proficiency and hands-on experience with Ktor or Spring Boot;
• Solid understanding of REST API design and experience with PostgreSQL/MySQL and ORMs;
• Practical experience with Coroutines, Flow, and message brokers (Kafka, RabbitMQ, Redis);
• Understanding of microservices, caching strategies, and containerization (Docker, Kubernetes);
• Experience with Git, CI/CD tools, and testing frameworks (JUnit, MockK, Kotest);
• Basic knowledge of cloud platforms (AWS, GCP, or Azure) and security best practices;
• Strong problem-solving skills and ability to work in a distributed team;
• English: B2 or higher (written and spoken);
• Nice to have: GraphQL, gRPC, event sourcing/CQRS patterns, Elasticsearch, serverless computing, distributed tracing tools, Java, Scala, Kafka Streams, Flink, search engines, MLOps pipelines, blockchain backend development, contributions to open-source Kotlin or backend projects.

• No conditions specified