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English
$
USD
I will build scalable backend systems, rest apis and database integration, nodejs
Steffen Wanne
About this gig
A powerful frontend needs a reliable backend behind it.
I build secure and scalable backend systems, REST APIs, and database solutions that help web applications run smoothly, handle users efficiently, and grow without performance issues.
Whether you are building a startup MVP, SaaS platform, dashboard, or custom web application, I can help you create a clean and reliable backend architecture.
What I can help you with:
- Backend development for web applications
- REST API development and integration
- Database design and optimization
- User authentication (Login, Signup, JWT)
- CRUD operations and backend logic
- Third-party API integrations (Payment, Email, SMS, etc.)
- Backend bug fixing and performance improvements
- Clean and maintainable code structure
Technologies I work with:
Backend: Node.js, Express.js, PHP, Laravel
Databases: MySQL, MongoDB, PostgreSQL API &
Tools: REST API, JSON, Postman, Git
I focus on writing clean, organized, and scalable backend code following best practices for security, performance, and future expansion.
Message me before ordering and I will review your needs and recommend the best approach.
Get to know Steffen Wanne
Steffen Wanne
Helping startups and businesses build, fix, and optimize mobile and web apps
- FromGermany
- Member sinceApr 2026
- Avg. response time13 hours
Languages
English, German, Italian, Spanish
Hi, I'm Steffen Wannemaker, a professional mobile app developer and full-stack web developer. I specialize in Flutter mobile apps and modern web applications. I help startups and businesses fix bugs, optimize performance, and build scalable front-end and back-end systems. With solid experience in React, APIs, and database integration, I deliver clean, efficient, and reliable solutions. If your app needs speed, stability, or a fresh build, message me now and let’s get it done.
My Portfolio
FAQ
What do you need to start my backend project?
I need a clear description of your project, required features, API needs, and any reference or documentation you have. If you're not sure, I can guide you.
Can you work on my existing backend or fix issues?
Yes, I can debug, optimize, and add new features to your existing backend system or API.
Which technologies do you use for backend development?
I work with Node.js, Express, PHP, and databases like MySQL, MongoDB, and PostgreSQL depending on your project needs.
Will you integrate third-party APIs into my system?
Yes, I can integrate payment gateways, email services, SMS APIs, and other third-party services seamlessly.
Is the backend secure and scalable?
Yes, I follow best practices for authentication, data validation, and clean architecture to ensure your backend is secure and scalable.
Do you provide API documentation?
Yes, I provide basic API documentation and tested endpoints (via Postman or similar tools) so you can easily use the system.
Do you offer support after delivery?
Yes, I provide post-delivery support based on your package, and I’m available for future updates if needed.
Can you build a full backend for my web app or SaaS project?
Absolutely. I can develop complete backend systems including APIs, database structure, authentication, and integrations.
