Web App Development in Schwetzingen & Mannheim – Solutions that work
Custom Web Apps for Your Business
Mia Holding GmbH & Co. KG develops high-performance, secure, and scalable web apps tailored precisely to your processes – from customer-facing portals and internal tools to complex platforms. We combine modern frontends (e.g., React/Next.js) with robust backends (Node.js, Python/FastAPI) and cloud infrastructure (AWS). This results in digital solutions that increase efficiency, reduce costs, and enable sustainable growth – locally built in Schwetzingen/Mannheim, with a DACH-wide perspective.
Advantages:
- Custom solutions for every industry
- Cutting-edge technologies (React, Node.js, AWS)
- Scalable & future-proof
- Local expertise: Schwetzingen & Mannheim


Why choose a Web App?
Web apps are platform-independent, require no installation via app stores, and can be centrally updated. This reduces development and maintenance costs, speeds up releases, and simplifies rollouts for teams. For many use cases, they are the most efficient choice, especially when desktop and mobile usage are equally relevant.
Runs on all common browsers and devices
No app store approvals needed, updates live instantly
One codebase instead of multiple native apps
Who benefits most from Web Apps?
Web apps create added value for many industries in Baden-Württemberg.
- Startups with digital business models
- Medium-sized companies in BW
- Real estate & financial service providers
- Trades & service providers
- E-commerce & platform operators
Bottom text
Our Services
Conception & Consulting
We determine goals, user needs, and KPIs, prioritize features, and define architecture, security, and roadmap. The result: a solid concept instead of costly detours.
- Workshops & scope definition
- UX concepts & wireframes
- Architecture & security
- Measurable KPIs
Clear plan instead of feature chaos.
Custom Development
Agile implementation with clean code standards, component design, and automated testing. Focus on performance, accessibility, and SEO basics.
- Clean, modular code
- React/Next.js, Node/Python
- Automated testing
- Accessibility best practices
Features your team will love.
Integration & Interfaces
Seamless connection of your web app to CRM/ERP, payment providers, databases, or third-party systems (REST/GraphQL, Webhooks) for stable data flows.
- CRM/ERP integration
- Payments & identity
- Data migration
- Webhooks & events
Everything works together.
Testing & Quality Assurance
Security checks (Auth, Roles, OWASP Top-10), performance and usability tests. Before go-live, your app passes a clear quality gate.
- Security reviews
- Performance testing
- Usability checks
- Release gate
Stable and secure.
Maintenance & Support
Monitoring, updates, backups, incident response, and further development – available as a service package with fixed response times.
- Monitoring & alerts
- Regular updates
- Backups & recovery
- Feature roadmap
Reliable in operation.
How it works
Analysis & Consulting
Define goals, scope, risks, and success criteria (workshops in Schwetzingen/Mannheim or remote).
Conception & UX/UI
Information architecture, wireframes, click prototype, technical design (APIs, data model, cloud).
Development (agile)
Iterative sprints, regular demos, early feedback.
Testing & Security
Unit/E2E testing, security scans, performance optimization, GDPR-compliant data protection concept.
Launch & Handover
Hardening, observability, team training, go-live.
Operation & Further Development
Monitoring, updates, feature roadmap, A/B testing.
Success stories from the region
Here’s how our web apps create measurable value
- 40% process optimization at an SME
- +25% customer retention via self-service portals
- Cloud-native AWS solutions
- GDPR-compliant development
- Scalable architecture for growth
- Faster time-to-market through agile sprints
From idea to solution with Mia Holding.
faq's
Frequently Asked Questions (FAQ)
Costs depend on scope, integrations, security requirements, and design. Small MVPs often start in the lower five-figure range, while larger platforms require more budget. We begin with a clear requirements workshop, jointly prioritize features, and create a transparent milestone-based quote. With agile methods, you get usable increments early and can manage investments based on data.
For an MVP, most projects take 6–12 weeks. More complex initiatives with multiple integrations take longer. The key is delivering a working core early and iteratively expanding it. Sprint demos ensure transparency, reduce rework, and shorten time-to-value.
Frontend with React/Next.js (or Vue/Nuxt), backend with Node.js (NestJS/Express) or Python (FastAPI/Django). Data with PostgreSQL/MySQL, caching via Redis, search with Elasticsearch; hosting & CI/CD in AWS (S3, RDS, ECS/Lambda, CloudFront). Security and data protection (Auth, RBAC, encryption, logging, GDPR) are standard.
Yes – with Progressive Web Apps (PWA), offline features are possible, using service workers, caching, and background sync. Critical workflows can remain stable offline and sync later.
Security-by-design: strong authentication (OAuth2/OpenID), role models, input validation, protection against OWASP Top-10, encryption (in transit/at rest), hardened infrastructure. Plus monitoring, audit logs, backup/recovery plans, and optional penetration testing. For GDPR, we focus on data minimization, processing logs, and contracts with cloud providers.
We combine **local presence** (Schwetzingen/Mannheim) with **technical excellence** and pragmatic execution. Clear communication, transparent roadmaps, and dedicated contacts build trust. Our goal: solutions your team enjoys using, that deliver measurable impact, and remain maintainable long-term.
5 Tips for Successful Web Apps
- Define clear goals and KPIs before starting
- Prioritize user-friendliness & accessibility
- Plan scalability & security from day one
- Focus features – start smaller, learn faster
- Don’t forget monitoring, updates & support
Start your project now.

Your Web App starts here
Innovative solutions, locally developed
in Schwetzingen & Mannheim.