Java/Kotlin Developer SSR/SR

We are looking for a highly skilled Senior Backend Developer with strong experience in Java and hands-on knowledge of Kotlin for backend development. The ideal candidate will be responsible for designing, developing, and maintaining scalable backend services and RESTful APIs within a microservices-based architecture.

This role requires collaboration with cross-functional teams including Product, Frontend, DevOps, and QA, as well as active participation in system design and architectural decisions.

Key Responsibilities

• Design, develop, and maintain backend services and RESTful APIs using Java and Kotlin
• Build and enhance microservices-based architectures
• Work with frameworks such as Spring / Spring Boot (Java or Kotlin)
• Integrate backend services with SQL and/or NoSQL databases
• Ensure code quality through unit testing, code reviews, and best practices
• Collaborate with Product, Frontend, DevOps, and QA teams
• Troubleshoot, debug, and optimize backend applications
• Participate in system design discussions and architectural decisions

Required Qualifications

• 5+ years of backend development experience using Java
• Hands-on experience with Kotlin for backend development
• Strong experience building REST APIs and backend services
• Experience with Spring Boot and Hibernate/JPA
• Solid understanding of microservices architecture
• Experience working with relational databases (PostgreSQL, MySQL, Oracle, etc.)
• Familiarity with Git, CI/CD pipelines, and build tools (Maven/Gradle)
• Good understanding of object-oriented design and design patterns

Nice to Have (To Be Validated During Interview)

• Experience with cloud platforms such as AWS, Azure, or GCP
• Exposure to Docker and Kubernetes
• Experience with messaging systems such as Kafka or RabbitMQ
• Knowledge of security protocols such as OAuth2 and JWT
• Experience migrating services from Java to Kotlin (experience in at least one is acceptable)

Location: Martínez, Buenos Aires, Argentina
Work Modality: Hybrid (On-site presence required 1–2 times per week)