Kotlin Backend Developer

About the Position

We are seeking a Kotlin Backend Developer to design and maintain scalable web backend systems using Kotlin. Join our team in Cluj for a contract position.

Profile Summary

Experienced backend developer specializing in Kotlin-based web backend systems, with a strong focus on building scalable, maintainable, and secure server-side applications. Comfortable working across the full backend lifecycle, from API design and database modeling to deployment and long-term system evolution.

Core Responsibilities

• Design, develop, and maintain web backend systems using Kotlin
• Build and maintain RESTful and/or GraphQL APIs
• Implement business logic, data processing, and integrations with external services
• Design and optimize database schemas and queries
• Ensure application performance, reliability, and security
• Write clean, testable, and well-documented code
• Collaborate with frontend developers, product managers, and stakeholders
• Participate in system architecture decisions and technical planning
• Maintain and evolve existing backend systems over time

Technical Skills

• Kotlin (primary language)
• JVM ecosystem (Java interoperability)
• Backend frameworks such as:
  • Spring Boot / Spring WebFlux
  • Ktor (or similar)
• API design (REST, JSON, HTTP, authentication)
• Databases:
  • Relational (PostgreSQL, MySQL)
  • NoSQL (optional)
• ORM / database tools (Hibernate, Exposed, JPA, etc.)
• Asynchronous and concurrent programming
• Version control (Git)

Additional Experience (Nice to Have)

• Cloud platforms (AWS, GCP, Azure)
• Containerization (Docker)
• CI/CD pipelines
• Authentication & authorization (JWT, OAuth2)
• Microservices or modular monolith architectures
• Monitoring, logging, and performance tuning

Working Style

• Able to work independently and take ownership of backend components
• Comfortable maintaining and extending existing systems
• Focused on code quality, scalability, and long-term maintainability
• Strong problem-solving and communication skills

Engagement

• Suitable for long-term collaboration
• Can work as part of a distributed or in-house team

Job Details

• Department: Development
• Location: Cluj, Romania
• Employment Contract: Contract

We Offer

• Opportunity to work in a dynamic and innovative environment
• Competitive compensation package
• Professional growth and development opportunities

About the Company

Join our team and help us create amazing digital experiences.

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