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// just_works

> go run ./cmd/justworks

JUST WORKS

Software architecture and backend development. Performance as an obsession.

Think. Build. Solve.

Get in touch

// 01 — solutions

What I solve

Systems that don't scale

Backends buckling under load. I analyse bottlenecks and fix them. In PHP, in Go, or a combination of both.

Slow applications and websites

From performance analysis to concrete optimisations. I find the root cause and fix it.

Complex authentication and authorisation

OIDC, SAML, OAuth 2.0, identity brokering. Built correctly, the first time.

Architecture without direction

From proof-of-concept to production-ready architecture, including Kubernetes deployment.

New applications or platforms

Backend or fullstack development for web and native applications, from concept to launch.

// 02 — expertise

Expertise

Languages & Runtimes

  • Go
  • Rust
  • JavaScript/TypeScript
  • PHP
  • HTML/CSS

Frameworks & Libraries

  • Tailwind CSS
  • DataStar
  • React
  • Next.js
  • Angular
  • Vue

Domains

  • Software architecture
  • Performance engineering
  • Scalable systems
  • Integrations (3rd-party and internal)
  • Web and native application development
  • Identity & Access Management

Identity & Access Management

  • OpenID Connect (OIDC)
  • SAML 2.0
  • OAuth 2.0
  • Identity Provider (IDP) integration
  • Federated identity brokering
  • WebAuthn / Passkeys

Infrastructure

  • Kubernetes
  • Docker
  • Linux
  • Self-hosted infrastructure

Databases & Messaging

  • Kafka / Redpanda
  • PostgreSQL
  • Redis
  • MySQL
  • RabbitMQ
  • MongoDB
  • ElasticSearch

// 03 — clients

Where I've worked

A selection of clients across the years.

  • Current · via SSOBuddy

    Flemish Government

    Digitaal Vlaanderen — Access Management (ACM)

    High-performance, scalable identity and authentication solutions: WebAuthn, FIDO, OAuth 2.0, OpenID Connect, 2FA and SAML. Libraries and building blocks that improve the developer experience.

    Go · Kubernetes · Kafka · TypeScript · Python

  • Previous engagement

    Essent.be

    MIG 4 & MIG 6 implementation and integration. First as Team Lead, QA Lead and Scrum Master / facilitator, later migrating legacy PHP to a modern Symfony codebase. Two engagements across several years.

    PHP · Symfony · AngularJS · Java · Activiti · ActiveMQ

  • Previous engagement

    Be-Mobile

    Migrated a PHP monolith to a Go microservice architecture on Kubernetes. Introduced Go best practices, documented the architecture, and rolled out Scrum within the team.

    Go · PHP · Kubernetes · Kafka

  • Previous engagement

    Ravago

    Technical lead on a full-stack invoice processing platform. AngularJS to Angular 8 migration.

    Angular · TypeScript · Java · Spring Boot · Mule · Kubernetes

  • Previous engagement

    Pawshake

    Greenfield React.js frontend integrated into an existing server-rendered PHP marketplace.

    React · Redux · TypeScript · PHP

  • Previous engagement

    Onderdelenwinkel.nl

    Performance and scaling optimisations for an international Magento webshop using Varnish, Redis and async processing. Coached on-site and remote development teams, improved processes and workflows.

    PHP · Magento · Varnish · Redis

Also worked with

  • VRT
  • Sparkcentral
  • Nucleus.be
  • 21Net

// 04 — about

About Jonas

Jonas has been writing software for more than twenty years. Most of that time spent in backend and architecture roles, with a long stretch focused on performance: figuring out why something's slow, and then making it fast. He runs Just Works as a one-person company, taking on freelance work for teams that need performant, scalable systems.

His day job right now is long-term consulting. He's currently embedded as an IAM architect with the ACM team (Access Management) at Digitaal Vlaanderen, the Flemish government's digital agency. Shorter, focused engagements are on the table too. Though honestly, the problems worth solving rarely fit in a couple of weeks.

Technically he leads with Go and software architecture, emphasizing performance, scalable systems, and integrations—across third-party and internal services, and platform-wide flows. Web and native work fits in where the product needs it. Identity & Access Management (OIDC, SAML, OAuth 2.0) is also something he knows deeply from years of delivery. He's also a Certified Scrum Master and has run a lot of team ceremonies over the years. Stand-ups, refinements, plannings, retros, demos. Nothing fancy. Just the rituals done well.

Outside of work, Jonas volunteers. For several years he was the main organiser of the Belgian Go Meetup (stepped back a while ago, different season of life). These days he mostly lends a hand to local non-profits, usually BMX-related stuff in the area.

Based in Oud-Turnhout, Flanders, Belgium.

// 05 — contact

Contact

Available for new projects. Get in touch.

website@justworks.be

or email directly at website@justworks.be