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Java Backend Developer (Kotlin)
  • Warsaw
Java Backend Developer (Kotlin)
Warszawa, Warsaw, Masovian Voivodeship, Polska
Cyclad
20. 10. 2025
Informacje o stanowisku

technologies-expected :


  • Java
  • Kotlin

about-project :


  • Work Setup: 100% Remote work
  • Rate: 120 PLN/net/h + VAT (B2B contract)
  • Language: English (B2+ Required)
  • Start date: depending on candidate availability
  • Tech stack: Java Core (11, 17) Kotlin Spring Boot Spring Data JPA ORM (Hibernate) RabbitMQ - Frontend technologies include Angular, Node.js, Express, and Fastify.

responsibilities :


  • Design and implement large-scale, complex software applications using Java, Kotlin, Spring, and JUnit within microservices architecture.
  • Collaborate in Agile, cross-functional teams alongside BAs, POs, QAs, Frontend Developers, and UX Designers.
  • Apply best practices to ensure code quality, scalability, and maintainability.
  • Monitor and validate product quality using proper testing frameworks and design patterns.
  • Foster technical discussions to drive continuous product improvement and innovation.
  • Communicate actively with diverse stakeholders across multiple organizational levels to understand challenges and propose effective solutions.
  • Demonstrate strong analytical and problem-solving skills throughout all stages of development.

requirements-expected :


  • Bachelors degree in computer science, Software Engineering, or equivalent work experience.
  • Proficient English communication skills (minimum B2 level).
  • Proven experience as a Backend Developer using Java and/or Kotlin.
  • Strong proficiency in Java Core, Spring Boot, Spring Data, JPA, ORM (Hibernate), and RabbitMQ.
  • Solid understanding of data structures, algorithms, and complexity analysis.
  • Hands-on experience with distributed systems and microservices architectures, including client-side composition and service integration.
  • Expertise in API design, maintenance, and optimization.
  • Experience with relational databases and query optimization.
  • Knowledge of testing methodologies, code validation, and product quality monitoring.
  • Familiarity with browser debugging and troubleshooting techniques.
  • Experience with CI/CD tools (e.g., Azure DevOps, GitHub Actions).
  • Comfortable working in Agile environments (experience with SAFe is a plus).
  • Nice to have: Experience with Kafka and/or architectural solution design.

offered :


  • Full-time job agreement based on B2B
  • Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible
  • Multisport card (also for an accompanying person)
  • Life insurance

benefits :


  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of professional training & courses
  • life insurance
  • remote work opportunities
  • flexible working time
  • dental care
  • no dress code

  • Praca Warszawa
  • Warszawa - Oferty pracy w okolicznych lokalizacjach


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