Custom web application development with Next.js
Do you have a product idea or need an internal tool? I build custom web applications with Next.js that perform well, are easy to maintain, and are ready to grow, without unnecessary complexity.
What problem does this solve?
Many companies start with spreadsheets, disconnected tools, or an outdated website that no longer fits their processes. That works for a while, until volume grows, roles become more complex, or mistakes get more expensive.
A custom web application brings processes together: users, data, workflows, and integrations in one clear environment. Instead of manual exports and email chains, you get a single place where the work happens.
This is broader than just a customer portal or a SaaS MVP. It's about the product itself: which flows need to deliver value first, and how do you set up the technical foundation so you can expand later?
Next.js fits well here: fast interfaces, server rendering where useful, and both frontend and backend logic in one modern stack. That keeps delivery and maintenance more manageable.
Who is this for?
- Startups that want to launch a first product version
- Companies that need an internal tool or workflow app
- Teams stuck on Excel, email traffic, or disconnected SaaS tools
- Organizations that want to replace or rebuild an existing application
- Founders unsure whether they need a 'website' or real application functionality
What I concretely build
- New web apps from idea to production
- User flows, UI, and business logic
- Authentication, roles, and basic permission structure
- APIs, databases, and external connections
- Deployment to a stable production environment
- Room for future modules without rewriting from scratch
Approach
- 01
1. Scope and priorities
We determine what's truly needed for the first release. A sharp MVP prevents months of building features nobody uses.
- 02
2. Architecture and data model
A clear technical foundation: structure, data, authentication, and integrations that stay extensible later. Decisions are made with maintenance in mind.
- 03
3. Building in visible steps
You regularly see working parts. That keeps decisions concrete and lets you adjust along the way.
- 04
4. Delivering and improving
After launch I can help with fixes, new features, or handover. If you're really after a portal or SaaS product, we'll steer specifically in that direction.
Technologies
Example from practice
For a digital services platform, I built a conversion-focused flow where users can configure, order, and manage services. Think configuration, checkout, a user environment, and order management, built on Next.js, TypeScript, and PostgreSQL. That kind of project requires both product decisions and technical decisions that don't get in the way later.