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Fiverr Pro
English
$
USD
I will build scalable saas backend, rest API, database and custom integrations
THOMAS MARTIN
About this gig
Hello,
Is your SaaS stuck because the backend, REST API, database, or integrations are not working together?
I build scalable SaaS backends, REST APIs, databases, authentication systems, and custom integrations that turn MVPs into reliable software.
I can help with:
- Frontend with no working backend
- Broken or missing REST APIs
- Database structure and slow queries
- Login, authentication, and user-role issues
- Multi user or multi-tenant SaaS
- Stripe, payment, and subscription systems
- Third-party API integrations
- Webhooks, data sync, and automation
- Backend bugs, errors, and deployment
- MVPs that need a production-ready backend
My services include:
- SaaS backend development
- REST API development
- custom API endpoints
- database design
- authentication
- user management
- role based access
- API integrations
- payment integration
- webhooks
- automation
- database optimization
- API troubleshooting
- and deployment.
Whether you're launching a SaaS MVP, powering a web or mobile app, or upgrading an existing backend, I focus on the system behind the productnot just the code.
Send me your requirements, existing backend, or rough idea, and let's map out the right solution.
Get to know THOMAS MARTIN
THOMAS MARTIN
AI DEVELOPER
- FromFrance
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, French, Spanish, German, Italian
Hello, my name is Thomas. Hi, I’m a software developer focused on building modern, reliable digital solutions that help businesses bring their ideas to life. I work on custom web applications, AI powered solutions, SaaS products, and other tailored software projects. I care about clean development, responsive experiences, practical functionality, and clear communication throughout the process. My goal is simple: understand what you need, build it properly, and deliver a solution you can confidently use and grow.
FAQ
What type of backend applications can you build?
I can build backends for SaaS platforms, web applications, mobile apps, dashboards, marketplaces, CRM systems, business tools, and custom software.
Can you build a REST API from scratch?
Yes. I can design and develop REST APIs with custom endpoints, database connectivity, authentication, validation, error handling, and testing.
Can you connect my frontend to a backend?
Yes. I can connect your existing frontend to a new or existing backend API and database so your application can handle real data and user actions.
Can you fix my existing backend or API?
Yes. I can troubleshoot API errors, database problems, authentication issues, broken endpoints, integration problems, and other backend issues. Please provide the existing code and explain the problem before ordering if the issue is complex.
Can you build authentication and user roles?
Yes. I can implement features such as registration, login, password management, protected routes, user roles, permissions, and user management.
Can you build a multi-tenant SaaS backend?
Yes. Multi-tenant functionality can be included in the Premium package or provided through a custom offer depending on the architecture and requirements.
Can you integrate Stripe and subscriptions?
Yes. I can integrate Stripe payments, subscriptions, webhooks, and related backend functionality. More complex billing requirements may require a custom offer.
Can you integrate third-party APIs?
Yes. I can connect third-party APIs, webhooks, external services, and other systems to your backend. The number and complexity of integrations depend on your package.
Which databases can you work with?
I can work with databases such as PostgreSQL, MySQL, MongoDB, Supabase, Firebase, and other suitable database systems depending on the project.
Can you deploy my backend?
Yes. I can deploy the backend to a suitable hosting/server environment and help configure the required environment variables, database connection, and production settings.
