For one of our clients we are looking for a Senior Java Developer with Kafka Streams with 5+ years of experience, Dutch speaking

General conditions:

• Start date: Feb 25, 2026

• Location: remote, with some travel to offices in Belgium (Brussels and others)

• Duration: 2 years + possible extension of 12 months

• Contract: B2B via Mind

• Languages: Dutch C2

• Deadline for applications: Jan 21, 2025

Senior Java Developer with experience in Kafka Streams is being sought.
The project involves revamping the data exchange between client's systems used in its role as grid operator and those used as data manager. This involves modernizing the asset data interface between the two departments, and transferring responsibility for certain information from one department to the other. This asset data is crucial for accurately calculating consumption and grid costs, and for facilitating the functioning of the energy market.

Main skills:

• Developing JAVA-based applications - 5 years min

• Agile development methodology

• Kafka internals: partitions, replicas, ISR, consumer groups, offset management, exactly-once semantics

• experience with pair programming

• Hands-on experience with Kafka Streams (DSL and Processor API) - 3 years min

• Dutch at C2 level

• experience with CI/CD (GitHub Actions/Azure DevOps/Jenkins), Docker and Kubernetes

• knowledge and experience with relational databases (e.g. Oracle, SQL, etc.)

• knowledge and experience with Unit Testing

• Cloud Kafka developer certification

• Production experience with stateful stream processing: windowing, joins, session windows, interactive queries, RocksDB - nice to have

Disclaimer for agencies:

Mind OSS will not accept unsolicited resumes from any source other than directly from a candidate. Mind OSS will consider unsolicited referrals and/or resumes submitted by vendors such as search firms, staffing agencies, professional recruiters, fee-based referral services and recruiting agencies (hereafter “Agency”) to have been referred by the Agency free of charge. Mind OSS will not pay a fee to any Agency that does not have a prior written agreement with Mind OSS, validated by its HR department, in place regarding a specific job opening and allowing to submit resumes.