Backend Architect Kafka & Java

About us

At QualityMinds, we specialize in software quality assurance, development, and DevOps services. With an experienced team, we deliver innovative solutions, working with both large and medium-sized companies. Our portfolio includes test automation, performance testing, development services, and DevOps support. We are actively involved in the tech community, organizing lectures and training sessions. The Polish branch consists of a team of 65 specialists working on domestic and international projects. Our greatest strength and value are our people. We believe that the best results are achieved through passion and positive energy.

The project and the team

We are looking for an experienced Backend Developer with strong expertise in Apache Kafka and Java to join our team. You will be instrumental in designing and implementing modern, event-driven, scalable, and resilient backend systems.

The ideal candidate will help define integration patterns, contribute to system architecture, and collaborate closely with DevOps teams to ensure robust and aligned deployments across environments.

Responsibilities

• Design and implement backend architectures with a focus on event-driven systems using Apache Kafka
• Develop and maintain integration patterns for both new and existing applications
• Develop and implement patterns for Apache Kafka-based
• messaging and data streaming
• Architect scalable, resilient services in Kubernetes-based environments
• Ensure high availability, fault tolerance, and secure communication between distributed components
• Define and document guidelines and best practices for Kafka and Java development workflows
• Collaborate with DevOps teams to align infrastructure and service deployments
• Manage Kafka architecture elements such as topics, schemas, and supporting tools
• Demonstrate a strong sense of ownership and accountability for progress

Requirements

• At least 10 years of experience as a backend developer
• Solid hands-on experience with Architecture of Apache Kafka, including topics, tools & schema management
• Experience with Kafka ecosystem tools (e.g., Kafka Streams, Kafka Connect, Confluent Platform)
• Proficiency in Java programming
• Deep understanding of event-driven architectures
• Experience with Kubernetes and containerized environments
• Ability to design and implement resilient, secure, and scalable backend systems
• Familiarity with infrastructure concerns and experience working closely with DevOps teams
• Strong documentation and communication skills to share technical guidelines and best practices
• Fluent in spoken and written English (minimum B2 level)

Nice to have

• Familiarity with CI/CD pipelines and automated deployments
• Bachelor’s degree or higher in Computer Science or related field
• Fluent in spoken and written German 

We offer

• Fully remote or onsite work (in our Warsaw office)
• Contract of employment or B2B contract
• Flexible working schedule
• Medical care (LuxMed or PZU Zdrowie)
• MyBenefit or Pyszne.pl
• Self-development opportunities
• Internal & external trainings
• Certification opportunities
• English/German conversations with native speakers
• International teams and projects
• Choice of working environment (Mac/Linux/Windows), dual monitors