Freelance engineer & coach · Berchem, BE

Olivier Cappelle

Senior Java / Spring engineer and technical coach — ten years building backend systems and the teams around them. Freelance since 2023. Now going deep on agentic engineering: shipping production software with AI, not vibe-coded demos.

What I do
Backend & platform engineering

Java, Spring, Kotlin. Microservices, event-driven systems, Kubernetes on Azure and AWS. Architecture that survives contact with production.

Technical coaching & lead

Team lead, tech lead, trainer. I work Socratically — understand what you’re trying to do, then fill the gaps. Juniors to seniors.

Agentic engineering

Claude Code, multi-agent workflows, AI-assisted delivery. Production-ready output with evals and guardrails — not slop.

Selected work
Belfius2025 — now

Senior Java/Spring dev on a Risk / Compliance / Audit platform. Azure, Kubernetes, Spring Boot, ELK, Redis.

Corilus2023 — 25

Careconnect Nurse. Spring Cloud, React, Kafka, ArgoCD. Coached juniors, ran hackathons and knowledge-sharing.

DPG Media2023

Streamz / VTM GO onboarding & subscriptions. Kotlin / Spring Boot on AWS; Chargebee, Adyen, Stripe.

YPTO / NMBS2021 — 22

Technical lead, backup scrum master. Kubernetes migration, cross-team best practices.

Universiteit Gent2020 — 21

Lead dev. Migrated legacy JEE/JSF + PHP apps to Spring; retrained a Pascal dev to Java.

Smals2018 — 20

Senior fullstack, buildmaster / architect on a microservices platform. SPOC for 20+ consultants.

Inetum-Realdolmen2016 — 23

Java Community Lead, team lead, technical coach & trainer. Owned the acADDemICT junior track; organized Devoxx / Spring I/O.

Writing
Radar

Notes from the frontier of AI-assisted development — what I actually tried, what actually broke, what I’d do again. Weekly finds, monthly deep dives with real numbers.

Read Radar
Contact

Available for freelance backend, platform, and coaching work — and conversations about doing AI-assisted engineering properly.