Kotlin/Java Backend Engineer

Johan de Vries

Backend engineer with 20+ years of experience designing, building production-ready services. Always exploring new technologies and approaches.

Strong focus on high-performance, scalable architectures that support frequent, reliable software delivery. I have a particular interest in fast feedback loops that provide insight into system behavior, where both technical and functional indicators matter.


I can help with

  • Building high-performance, scalable, backend architectures.

  • Building APIs and event-driven services.

  • Building data pipelines.

  • Designing and optimizing databases

Technical skills

  • Languages - Kotlin, Java, SQL

  • Frameworks - Spring Boot, Exposed, jOOQ, JPA/Hibernate

  • Databases - MySQL, PostgreSQL, Amazon DynamoDB, Cloud BigTable, OracleDB, PL/SQL

  • Data Analytics - Apache Flink, Beam, Kafka

  • AWS - ECS/EC2, SNS/SQS, S3, Lambda, Aurora MySQL, DynamoDB

  • GCP - GKE, Pub/Sub, BigTable, BigQuery

  • Architectural - API, Event-driven, Domain-driven, Data processing, Data modeling

  • Observability - DevOps - Datadog, Prometheus, Grafana, Terraform, Docker, K8s, GitlabCI, CircelCI