Kotlin Developer

Senior • Remote

Warsaw, Poland

Position: Kotlin Developer

Location: remote

Employment type: B2B

About the role:We are looking for an experienced Kotlin Developer to join team and contribute to building high-performance, scalable, and secure backend services. In this role, you will design and develop RESTful APIs and microservices, ensuring code quality, comprehensive testing, and compliance with industry best practices.

Key Responsibilities:

Develop and maintain RESTful APIs and microservices using Kotlin and Quarkus.
Lead OpenAPI-first design, maintaining accurate API specifications and documentation.
Optimize system performance, scalability, and reliability.
Implement robust end-to-end integration testing strategies.
Ensure application security (OAuth2/OIDC, JWT) and adherence to industry standards.
Collaborate with cross-functional teams on design, data modeling, and system integration.
Conduct code reviews, mentor junior developers, and promote engineering excellence.

Required Skills and Experience:

Strong proficiency in Kotlin and JVM-based backend development.
Hands-on experience with Quarkus and OpenAPI specification design.
Solid understanding of REST principles, database design (PostgreSQL/MySQL), and ORM (Hibernate/Panache).
Expertise in containerization (Docker) and deployment on Kubernetes.
Knowledge of observability and monitoring tools (OpenTelemetry, Prometheus, Grafana).
Familiarity with CI/CD workflows and secure coding practices.

What We Offer:

Work in a dynamic team using modern technologies.
Opportunities for professional growth and technical mentoring.
Flexible working arrangements and support for skill development.
Access to cutting-edge tools and technologies in a modern backend ecosystem.

Upvanta sp. z o.o.

Upvanta sp. z o.o. is a company operating in the technology industry, specifically focusing on developing high-performance web applications with excellent UX/UI. The company values clean code, attention to detail, and the satisfaction derived from building refined user interfaces. Upvanta sp. z o.o. employs agile methodologies to foster a collaborative environment that encourages knowledge exchange and continuous development. The company is committed to working on large-scale, business-critical projects and offers its team members the opportunity to influence product development and technological decisions. Upvanta sp. z o.o. promotes a flexible work model and maintains a friendly atmosphere with open communication and a culture of collaboration.