Senior Java Developer

Project Info

The project centers around a high-performance Kotlin application consisting of 7 functional services. It serves as a vital translation layer for JSON/XML web service communications within the global airline content distribution ecosystem. Deployed in a Google Cloud Platform (GCP) environment, the system powers integration and communication for multiple airline carriers and agencies worldwide.

Key Functional Areas

• Protocol Translation: Managing XML/JSON web services communication across the global airline distribution network.

• Microservices Architecture: Maintaining and expanding a suite of 7 functional Kotlin services hosted on cloud infrastructure.

• Global Ecosystem Integration: Enabling high-availability connections for international travel agencies and airline platforms.

Responsibilities

• Design, develop, and maintain cloud-native microservices using Kotlin and Java.

• Build and support RESTful APIs, web service interfaces, and integration components.

• Maintain CI/CD pipelines, deployment processes, and cloud infrastructure integration.

• Work with Linux-based virtualized environments, Docker, and Kubernetes.

• Troubleshoot complex issues, optimize application performance, and write clean, maintainable code.

• Collaborate within an agile environment on simultaneous projects and deliver technical goals.

Requirements

• Experience: 4+ years of relevant professional experience as a Java or Kotlin Developer in complex software projects.

• Core Tech Stack: Proficiency in Kotlin and/or Java (with full willingness to code in Kotlin), Spring, REST Services, Git, Maven, and Jenkins.

• Cloud & OS: Hands-on development experience with GCP, Kubernetes, Docker, and user-level Linux/virtual machines.

• Work Model: Hybrid work setup (2–3 days a week from the Krakow office, working in the CET time zone).

• Soft Skills: Strong analytical thinking, task independence, excellent English communication, and a collaborative, team-first mindset.

• Nice to Have: Experience with AI-related concepts and tools, Prometheus/Grafana monitoring, or specialized web services infrastructure.

Must possess a legal work permit in Poland

Benefits:

General benefits - depends on the form of employment

• Hybrid work model combining office & remote work

• Attractively located office with collaboration spaces

• Onsite parking space for employees

• Referral program with financial bonus

• Life Insurance

• Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment

• Access to internal Learning Platform with multiple trainings oriented for professional growth

Lifestyle benefits:

• Access to MyBenefit platform (Multisport included)

• Team Building activities

• Charity initiatives

• Working environment promoting diversity and inclusion

Health benefits:

• Private medical care - Platinum Package