森の開発者 ・ Forest-grown software

Sebastien
Wouters

Backend Java / Kotlin developer. I grow quiet, resilient systems — the kind that hum along in the dark and never wake you at 3am.

See the path 送る ・ Get in touch
Sebastien Wouters in a blue kimono outside a traditional Japanese house
技術 ・ Stack

Tools of the grove

Languages

Kotlin Java SQL Bash

Frameworks

Spring Boot Ktor Micronaut JUnit 5

Data

PostgreSQL Kafka Redis Elasticsearch

Platform

Docker Kubernetes AWS Gradle
経歴 ・ Path

Where I've grown

  1. 2022 — NOW

    Senior Backend Engineer · Mossbyte

    Lead a fleet of Kotlin + Ktor services handling ~40k req/s. Drove an event-sourced rewrite that cut p99 latency by 38% and made on-call boring again.

  2. 2019 — 2022

    Backend Engineer · Toritron

    Built event-driven Java + Kafka pipelines for a payments platform. Owned reconciliation, idempotency, and the quiet correctness nobody notices when it works.

  3. 2017 — 2019

    Software Engineer · Hinoki Labs

    Shipped Spring Boot APIs and stood up the team's first real CI/CD. Where I learned that good infrastructure is mostly patience.

略歴 ・ About

Quiet hands, deep roots

I treat backend work like tending a forest: plant something simple, let it grow predictably, and prune ruthlessly. I care about boundaries, observability, and code that the next person can read without a guide.

Off the keyboard you'll find me on a trail somewhere with a thermos of tea, sketching system diagrams I'll probably never build.

Sebastien Wouters in a blue kimono outside a traditional Japanese house
連絡 ・ Contact

Let's build something quiet & strong

Open to backend roles and the occasional thoughtful freelance project.

Email me GitHub LinkedIn