Mid Java Developer

Salary: 600-960 pln/md on B2B

Work mode: Remote (with visits to Warsaw once a month and willingness to participate in on-call duties)

Why choose this offer?

• Work on a high-impact data ecosystem
• Exposure to large-scale data processing, advanced analytics, and production-grade data models
• Modern tech stack (GCP, Spark, Airflow, Kafka, microservices)
  
  

Project

Development and expansion of an advanced analytical and operational ecosystem. The project focuses on delivering precise campaign performance data (Insights & Performance) and building tools that support large-scale investment decision-making. It includes creating reliable reporting systems, data attribution models, and scalable data pipelines, ensuring high-quality data availability for professional users.

Expected competences and knowledge

• At least 3 years of commercial experience with Java / Kotlin / Scala
• Solid understanding of data processing and analytics systems
• Experience with distributed data pipelines and orchestration tools
• Knowledge of GCP cloud environment
• Experience working with large-scale data systems (e.g. BigQuery, Spark)
• Familiarity with microservices architecture and event-driven systems
• Understanding of data modeling and data productionization
  
  

Nice to have

• Knowledge of Apache ecosystem, Avro, Terraform
  
  

Responsibilities You’ll Have

• Designing and developing reporting engines and attribution systems (Insights & Performance)
• Building and maintaining high-throughput data pipelines
• Collaborating with Data Science teams to productionize advanced data models
• Ensuring scalability, reliability, and performance of data systems
• Developing internal tools (bulk management, agency panels, RBAC systems)
• Supporting complex account structures and permissions management
• Willingness to participate in on-call duties
  
  

Technologies you'll work with

• Java / Kotlin / Scala
• GCP (BigQuery)
• PostgreSQL
• Apache Airflow / Composer
• Apache Spark
• Spring Boot
• Kafka
• Microservices architecture
• Apache, Avro, Terraform
  
  

Client – why choose this particular client from the Jit portfolio?

Our Client dominates the Polish e-commerce arena as the market leader since 1999. With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies.

Jit Team has had a successful partnership with our Client since spring 2021, with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services.

Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale, where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience.

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.