Java Developer

Experienced Kotlin developer with expertise in Apache Kafka, Elasticsearch, and message-driven microservice architectures. Skilled in developing scalable backend systems using modern technologies such as Docker, Kubernetes, and GraphQL APIs. Strong focus on elegant code and driving adoption of new technologies within organizations. Previous experience includes working as a senior backend developer for various companies, contributing to the development of platforms for collecting and analyzing customer feedback. Holds certifications in web programming and security. Fluent in English, Dutch, and Northern Frisian.

April 2022 - Present: Senior freelance backend developer (kotlin). Focus on scalability and modern techniques such as message driven microservices, Spring Boot, GraphQL, Docker, Kubernetes, Kafka, Elasticsearch, and domain driven design.

April 2020 - May 2022: Senior backend developer (kotlin/java). Worked on the GetFeedback platform, serving enterprise clients such as KLM, JustEat, and Booking.com. Developed a message driven decentralized container microservice backend using Kafka Connect and Kafka Streams, storing data in Elasticsearch. Also developed plugins for Gradle, standardized logging and metrics, and created supporting tools for Kafka applications.

April 2019 - March 2020: Senior backend developer. Developed voice of customer solutions for multiple platforms, focusing on Elasticsearch for data analysis and enrichment using NLP APIs.

July 2017 - March 2019: Senior backend developer. Developed voice of customer solutions for multiple platforms, focusing on Elasticsearch for data analysis and searchability.

June 2015 - July 2017: Senior backend developer. Worked on high traffic websites in the affiliate market, utilizing technologies such as Varnish, Elasticsearch, RabbitMQ, Couchbase, Cassandra, Kafka, Spark, Airflow, and PHP7.

June 2014 - June 2015: Backend developer. Worked on processing sensitive data for online mortgage advice in a secure environment. Migrated from a single-session to a multi-session model and introduced Amazon Web Services.

February 2014 - May 2014: Backend developer & SRE. Specialized in digital marketing for well-known brands in the BBDO ad agency network.