Custom web application development in Berlin
Looking to replace manual paperwork, scattered spreadsheets, or tedious email workflows with a tailored digital tool or customer portal?
I build custom web applications, client portals, and internal dashboards for companies in Berlin. Direct collaboration with Sven Lück, from first spec to steady server operations.
How a web app differs from a standard website
A classic business website presents information about your company. A web application is an interactive software tool in the browser: users log in, manage data, execute approval workflows, or view real-time metrics.
Typical use cases for companies & teams
Tailored web applications solve operational bottlenecks in daily work:
- Customer Portals & Self-Service
- Secure document sharing, project status tracking, and invoice downloads for your clients.
- Internal Business Dashboards
- Centralized view of key performance metrics, operational data, and team activities in real time.
- Form & Approval Workflows
- Structured data collection for field work or office tasks, replacing long email chains.
- Role & Permission Management
- Granular access controls for employees, clients, partners, and system admins.
- API & Third-Party Integrations
- Connecting existing databases, payment gateways, CRMs, or external services.
When a web app makes sense vs. when a website is enough
If your main goal is marketing and company presentation, a modern website is the right choice. If recurring workflows should be digitized, data linked, or clients given their own access, a custom web app may be the better fit — the real value depends on the process and the scope you choose.
What does a custom web app cost?
Custom web apps in the Business Webapp sense — for example with login, dashboards, or workflows — start from €6,000; many projects fall in the €6,000–15,000 range. Effort mainly depends on authentication, roles, integrations, and how many workflows you cover. Clearly scoped prototypes or lean internal tools are clarified in the briefing against the actual scope. Full guideline prices and packages are on the web pricing page.
Technical foundation: Next.js, APIs & reliable hosting
I build web apps using Next.js, React, and TypeScript. This ensures clean, type-safe code and easy extensibility. The app communicates with your backend or databases via structured APIs and runs in isolated Docker containers.
Security & privacy implementation in plain terms
We use established authentication standards (such as OAuth, JWT, and session handling), encrypted connections, data minimization, and clear role models. Absolute security or GDPR guarantees do not exist in software development; we build to current best practices and align hosting and access controls in the project.
Step-by-step process: From problem to working software
We take a pragmatic approach to keep development risk low:
1. Clarify Problem & Requirements
We analyze your manual process and define core software requirements.
2. Define a Lean MVP
An MVP is the first usable version with the smallest sensible feature set: it solves the main problem and is not an unfinished end product. Later we expand based on real usage, once it is clear what is actually needed.
3. Iterative Development & Demos
Incremental coding with regular demo reviews on a password-protected staging environment.
4. Testing, Hardening & Go-Live
Functional and security checks before deployment to your live infrastructure.
5. Operations & Ongoing Upgrades
Continuous maintenance, security patches, and feature additions based on real user feedback.
Infrastructure, DevOps & Care support
A web application requires reliable server hosting and regular maintenance. Read more about my complementary services:
View web app packagesDevOps consulting in BerlinInfrastructure & server setupsCare packages for ongoing app maintenance
Frequently asked questions about web app development
- How much does custom web app development cost?
- Pricing depends on functional scope. Web apps with login, dashboards, or workflows typically start from €6,000; many projects fall in the €6,000–15,000 guideline range. We clarify the exact scope through an MVP specification. Full packages and guideline prices are on the web pricing page.
- How do we start if we don't have a detailed specification yet?
- We begin with a scoping consultation. We outline core workflows and define a manageable initial release package (MVP).
- Can the web app integrate with our existing software systems?
- Yes. As long as your existing software (e.g., CRM, ERP, SQL database) provides an API or export interface, we can integrate with it.
- How is data protection and GDPR handled?
- We account for measures such as data minimization, encrypted transmission, and role-based access, and we align hosting location and processing arrangements in the project. A blanket GDPR compliance guarantee is not something we can seriously promise; this does not replace a legal review.
- Who owns the source code and intellectual property?
- 100% of the developed source code and full IP rights belong to your company upon full payment.
- Who manages server hosting and updates after launch?
- I offer tailored infrastructure and care packages to handle backups, security updates, and monitoring in live operation.
Planning a custom web application?
Let's explore your ideas without obligation and see how we can build your tool efficiently.