Senior Java Software Engineer (Kafka)

About the Project

Currently we are looking for Senior Java Developer with Kafka who will join a team working on projects from logistics industry. The project involves migrating the main IT system to a new, distributed cloud architecture.

Work Mode: hybrid from office in Gdansk (2-3 days/week)

Job Responsibilities

• Design and implement a reliable, scalable Central Messaging Platform leveraging Apache Kafka, fully aligned with enterprise architecture standards to support the organization’s changing requirements
• Create and maintain additional features and components for the Kafka-based solution
• Contribute to the deployment and management of the cloud infrastructure supporting the Messaging Platform
• Establish and maintain resilience and disaster recovery mechanisms
• Develop comprehensive monitoring tools and solutions for the Kafka ecosystem
• Manage and optimize the Kafka Messaging Platform and its cloud environment to ensure high performance
• Resolve complex incidents and technical issues to maintain system stability and reliability
• Collaborate with product teams to ensure best practices and smooth platform integration
• Deliver and maintain detailed documentation and support tools for operational teams

Expectations

• Min. 5 years of experience on a similar position
• In-depth knowledge and hands-on experience in developing (JVM) and managing Apache Kafka-based solutions
• Experience in Java development of cloud-native applications, preferably on AWS
• Familiarity with key Apache Kafka components such as Kafka Streams, Kafka Connect, and Schema Registry
• Knowledge of data serialization formats and schema management, including Avro, Protobuf, and JSON
• Strong understanding of asynchronous message processing, event-driven architecture, and asynchronous communication patterns
• Experience in implementing monitoring and observability tools such as Grafana Stack, Elastic Stack, and similar solutions
• Proficiency in using Git for version control
• Readiness to support Kafka-based solutions in a 24/7 production environment
• English on an advanced level (written and spoken)

We Offer

• Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development
• Consultant Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors
• Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics
• Spectacular integration events, both for you (e.g., annual Kick-Off trip, Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres)
• Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients
• Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years
• A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad

About 7N

Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. 

Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.