Services
SaaS & MVP Development
Take a product idea to a working, billable SaaS application, with the authentication, tenancy, and billing plumbing done properly the first time.
Brussels, Belgium · Senior-led delivery
Most SaaS products die in the six months before launch, buried under the unglamorous work nobody scoped: sign-up flows, password resets, per-tenant data isolation, subscription state, invoices, admin tooling, and the deployment pipeline. The Weekly Dev builds that layer as a matter of routine, so the time you have left goes into the part of the product that is actually yours.
When this applies
- You have validated an idea and need a version real customers can pay for, not a clickable prototype.
- A previous MVP was built quickly and cannot now be extended without breaking.
- The product needs multi-tenancy, roles, and permissions, and nobody on the team has designed that before.
- Billing, trials, and plan changes need to work correctly on the first invoice, not the tenth.
What you get
- A scoped MVP definition that separates launch-critical from post-launch work
- Multi-tenant data model with row-level ownership enforced in the database, not only the UI
- Authentication, session handling, password reset, and role-based access control
- Subscription billing integration with webhook handling and plan-change logic
- Customer-facing dashboard and an internal admin interface for support
- Deployment pipeline, environment configuration, database migrations, and backups
- Handover documentation covering architecture, environments, and runbooks
How it runs
Scope
We separate what must exist for the first paying customer from what can wait. The output is a written scope with an explicit list of what is deliberately excluded.
Architecture
Data model, tenancy strategy, and authorisation rules are decided before feature work starts. These are the decisions that are expensive to reverse later.
Incremental delivery
Work ships to a live environment continuously. You use the product as it is being built rather than reviewing it at the end.
Launch
Billing goes live, monitoring is in place, and the admin tooling exists before the first customer needs support.
Questions
- How small can an MVP be and still be worth building?
- Small enough that one user can complete the core workflow end to end and pay for it. If a feature does not sit on that path, it belongs in the excluded list and gets revisited after launch.
- Do I own the code?
- Yes. Code is delivered into your repository and your infrastructure accounts from the start of the engagement, not transferred at the end.
- What happens after launch?
- Most engagements continue at a reduced cadence for iteration and support. There is no obligation to continue, and the handover documentation is written so another team can take over.
From the Publication
Writing from the studio on the technologies behind this work.
Understanding React Server Components From First Principles
Vassilios Zalimidis · February 25, 2026
Implementing Authentication in Next.js 14 with Auth.js: A Step-by-Step Guide
Vassilios Zalimidis · August 22, 2024
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