Systems that don't scale
Backends buckling under load. I analyse bottlenecks and fix them. In PHP, in Go, or a combination of both.
> go run ./cmd/justworks
JUST WORKS
Software architecture and backend development. Performance as an obsession.
Think. Build. Solve.
// 01 — solutions
What I solve
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 — approach
How I work
-
01
Listen
I fully understand your problem before proposing a solution.
-
02
Build
Pragmatic, without unnecessary complexity. Code your team can maintain.
-
03
Deliver
From architecture to deployment. No half measures.
// 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 & Consent 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.
or email directly at website@justworks.be