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English
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I will build fix integrate supabase, rest API, firebase node js, graphql, openai API
Emmanuel O.
Level 1
About this gig
Need a secure backend, working database, or reliable API integration for your web app, mobile app, SaaS platform, or AI-built application?
I will build, fix, and integrate backend systems using Node.js, Supabase, Firebase, PostgreSQL, MySQL, MongoDB, REST APIs, webhooks, authentication, and cloud functions.
My services include:
- Backend and REST API development
- Supabase and Firebase setup
- Database design and migration
- API and webhook integration
- User authentication and authorization
- OAuth and social login
- Stripe, PayPal, Twilio, OpenAI, and Google APIs
- PostgreSQL, MySQL, and MongoDB
- Supabase RLS and Firebase security rules
- Bug fixing, CORS errors, failed requests, and server errors
- Lovable, Bolt, Replit, Base44, FlutterFlow, and Bubble backend setup
- Backend deployment, testing, and documentation
I focus on clean architecture, secure data handling, proper error management, and stable production-ready functionality.
Please contact me before ordering so I can review your requirements, API documentation, current stack, and the exact backend issue you need solved.
Get to know Emmanuel O.
Emmanuel O.
FULL STACK SAAS, AI APP, MVP, MOBILE APP AND INTERACTIVE 3D WEB DEVELOPER
Level 1
- FromNigeria
- Member sinceJun 2024
- Avg. response time1 hour
- Last delivery6 days
Languages
French, Spanish, German, English
I’m a Full-stack developer, AI Developer, and technical solution provider with 5+ years in tech and tech companies before freelancing, plus 50+ completed projects across SaaS, web apps, PWAs, 3D animated websites, AI mobile apps, MVPs, and automation systems. I help clients build, fix, launch, and scale production-ready digital products using Next.js, React, TypeScript, JavaScript, Laravel, Supabase, Firebase, REST APIs, authentication, Google OAuth, Stripe, databases, GitHub, Vercel, Netlify, Cloudflare, DNS, AWS cloud, Lovable, Replit, Base44, Bolt, and secure deployment workflows.
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FAQ
Can you fix my existing backend without rebuilding the whole app?
Yes. I first audit the current backend, identify the exact failure point, and repair only what is necessary. This saves time, protects working features, and reduces cost. I can fix broken APIs, authentication, database logic, webhooks, permissions, and server errors.
Which backend technologies and databases do you support?
I work with Node.js, Express.js, Supabase, Firebase, PostgreSQL, MySQL, MongoDB, REST APIs, webhooks, OAuth, and cloud functions. I can also connect secure backends to Lovable, Bolt, Replit, Base44, FlutterFlow, Bubble, React, and Next.js apps.
Can you integrate third-party APIs into my application?
Yes. I integrate documented REST, GraphQL, and webhook APIs, including Stripe, PayPal, Twilio, OpenAI, Google, Shopify, CRM, email, and payment services. I handle authentication, request flow, data mapping, error handling, testing, and secure key configuration.
Can you set up user authentication and role-based access?
Yes. I can implement email and password login, social login, OAuth, password recovery, protected routes, user roles, and admin permissions. I also configure Supabase RLS or Firebase security rules so users can only access the data and features assigned to them.
Can you design or restructure my database?
Yes. I can design a new database or improve an existing one by creating tables, collections, relationships, indexes, constraints, and access rules. The goal is a clean structure that supports your current features, prevents duplicate data, and scales as your application grows.
Do you migrate databases between Supabase, Firebase, or other platforms?
Yes. I can migrate schemas, records, authentication data, storage references, and backend connections between supported platforms. Before cutover, I verify data integrity, update environment variables, test critical workflows, and reduce the risk of downtime or missing information.
Will you deploy and test the backend after development?
Yes, when deployment is included in the selected package or custom offer. I can configure environment variables, connect the production database, deploy server functions or APIs, test the main workflows, and confirm that the frontend communicates correctly with the live backend.
What access and information do you need before starting?
I usually need your project link or repository, backend platform access, API documentation, test credentials, error screenshots, and a clear description of the expected workflow. Temporary or restricted access is preferred. Never send permanent passwords when safer access methods are available.
Can you work on an AI-generated or no-code application?
Yes. I regularly work with Lovable, Bolt, Replit, Base44, Bubble, and FlutterFlow projects that have incomplete or unstable backends. I can connect the database, repair authentication, integrate APIs, secure user data, and prepare the application for real users and production.
Do you provide support after the order is completed?
Yes. I test the completed scope before delivery and provide a clear summary of the work performed. If an issue is directly related to the delivered implementation, I will review it within the agreed revision period. New features or unrelated changes require a separate order.
