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Fiverr Pro
Français
$
USD
I will build fix backend, supabase, rest api, api integration, node js python, database
alex
À propos de ce service
Is your backend broken, API failing, database not connecting, webhook not triggering, or your web/mobile app missing the server side functionality it needs?
I will build, fix and integrate a reliable backend for your website, web app, SaaS, mobile app or business system.
SERVICE I OFFER:
- REST API development and custom API endpoints
- API integration and third-party API connections
- Backend bug fixing, debugging and error resolution
- Node.js, Express, NestJS and Python/FastAPI backend
- PostgreSQL, MySQL, MongoDB, Firebase and Supabase
- JWT authentication, OAuth, user roles and protected routes
- Stripe and payment API integration
- Webhooks and automated data synchronization
- Database design, queries and backend logic
- OpenAI/AI API and external service integration
- Backend optimization, refactoring and security improvements
- Deployment and production backend setup
Need a new backend built from scratch or an existing backend repaired, I will identify the problem, then implement the appropriate solution without unnecessary changes to your project.
You receive clean source code, tested functionality and a backend designed to work with your existing frontend or application.
CONTACT ME NOW
Découvrez alex
alex
SEO Backlinks, Guest Posts Secure Node js Supabase Backends APIs, PostgreSQL
- DeÉtats-Unis
- Membre depuissept. 2026
Langues
Français, Anglais, Allemand, Espagnol
I help businesses build, fix, secure and grow high performing digital products. I handle high authority SEO backlinks, niche edits, guest posts and link building that target relevant buyers not random links. On the development side, I build and fix Node.js, Python, REST APIs, Supabase and PostgreSQL backends, including API integrations, database architecture and RLS security policies. Whether you need stronger search visibility, a reliable backend or urgent Supabase security fixes, I deliver clean, practical solutions focused on results.
FAQ
Can you fix my existing backend instead of rebuilding it?
Yes. I can inspect the existing backend, identify the source of the problem and fix the API, database, authentication, webhook or server-side logic without unnecessarily rebuilding working parts.
Can you build a REST API for my website or mobile app?
Yes. I can develop custom REST APIs and connect them to your web app, mobile app, SaaS platform or dashboard, including database operations, authentication and third-party integrations.
Can you integrate Stripe or another payment API?
Yes. I can implement payment APIs, checkout flows, webhooks, subscriptions and server-side payment logic according to your project requirements.
Can you connect my backend to Supabase or Firebase?
Yes. I can configure authentication, database connectivity, storage, backend functions, APIs and application integration using Supabase or Firebase.
Can you fix webhook problems?
Yes. I can investigate webhook delivery, endpoint responses, authentication, payload handling and backend processing so the required events reach your application correctly.
Can you add authentication and user roles?
Yes. I can implement secure authentication, protected routes, JWT/OAuth flows, user management and role-based access where required.
Do you work with Node.js and Python?
Yes. I can work with Node.js backend technologies and Python frameworks such as FastAPI or Django depending on the application's requirements.
Can you connect my existing database?
Yes. I can work with databases such as PostgreSQL, MySQL, MongoDB, Firebase and Supabase, depending on your existing architecture and requirements.
Can you deploy the backend after development?
Yes. Deployment can be included when the selected package covers it. I can work with suitable cloud or hosting environments after reviewing your project.
Can you integrate an AI API into my backend?
Yes. I can connect AI services and external APIs to your backend and handle authentication, requests, responses, database operations and application logic.
