You will get secure, scalable RESTful APIs using Node, Python, express and MongoDB/SQL
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Project details
Do you need a robust, high-performance backend to power your web or mobile application?
I am a Backend Developer specializing in Node.js, Express, and Database management. I build clean, well-documented, and secure REST APIs that serve as the backbone of your application, ensuring smooth data flow and fast response times.
What I Deliver:
Custom API Development: RESTful or GraphQL APIs tailored to your business logic.
Database Design: Schema design for MongoDB (NoSQL) or PostgreSQL/MySQL (SQL).
Authentication: Secure user login using JWT (JSON Web Tokens) or OAuth (Google/Facebook).
Performance: Optimization for speed, caching (Redis), and scalable architecture.
Security: Implementation of best practices (Data validation, Rate limiting, OWASP standards).
Documentation: Complete API documentation using Swagger/OpenAPI for your frontend team.
Integration: Connection with third-party services (Stripe, AWS S3, SendGrid).
Perfect For:
SaaS Platforms requiring complex custom logic
Mobile App Backends
Admin Panels & Dashboards
Existing System Integrations
Message me with your project scope for a custom architecture plan!
I am a Backend Developer specializing in Node.js, Express, and Database management. I build clean, well-documented, and secure REST APIs that serve as the backbone of your application, ensuring smooth data flow and fast response times.
What I Deliver:
Custom API Development: RESTful or GraphQL APIs tailored to your business logic.
Database Design: Schema design for MongoDB (NoSQL) or PostgreSQL/MySQL (SQL).
Authentication: Secure user login using JWT (JSON Web Tokens) or OAuth (Google/Facebook).
Performance: Optimization for speed, caching (Redis), and scalable architecture.
Security: Implementation of best practices (Data validation, Rate limiting, OWASP standards).
Documentation: Complete API documentation using Swagger/OpenAPI for your frontend team.
Integration: Connection with third-party services (Stripe, AWS S3, SendGrid).
Perfect For:
SaaS Platforms requiring complex custom logic
Mobile App Backends
Admin Panels & Dashboards
Existing System Integrations
Message me with your project scope for a custom architecture plan!
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $300
These options are included with the project scope.
$300
- Delivery Time 9 days
- Number of Revisions Unlimited
- Number of Pages 10
- Content Upload
- Source Code
Frequently asked questions
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HA
Hasan A.
Mar 19, 2026
B2B Module Implementation
Abdul handled the Peppol integration, VAT Ledger, VAT Return, IC listings, OSS reporting, and B2B compliance within our Laravel ERP project.
Our online and in-store sales are now fully compliant and government-ready. Very professional, reliable, and always available when support was needed.
Highly recommended!
Our online and in-store sales are now fully compliant and government-ready. Very professional, reliable, and always available when support was needed.
Highly recommended!
HA
Haitam A.
Jan 8, 2026
Freelance Software/APP Devlopment (Python - NO CODE) Bumble
I really enjoyed working with Abdul Hamid. From the start, collaboration felt easy and natural. He quickly understood the project and the vision behind it and especially how everything needed to flow together inside the app, which honestly made a big difference.
What I appreciated most is that Abdul doesn’t just do what he’s asked. He thinks + suggests better approaches and often comes up with ideas that actually improve the product. When something needed to be adjusted or reworked. He adapted very fast and always stayed solution oriented.
On a personal level, he’s genuinely nice to work with. He listens and communicates clearly even takes the time to explain things properly. I also learned quite a lot from him along the way, both technically and in terms of how to structure a SaaS product in a smart and scalable way.
Technically he built the product on a solid and modern stack : React for the frontend, Supabase for the backend and database, Stripe for payments and subscriptions, OpenAI for smart features like quote generation and task suggestions, and Peppol integration for compliant electronic invoicing. Everything was implemented cleanly and thoughtfully with real attention to usability.
Overall, Abdul is a very strong developer who cares about what he builds. He’s reliable and easy to work with and clearly invested in delivering something that actually works for the end user. I’d happily work with him again he became my brother !!! And recommend him without hesitation.
What I appreciated most is that Abdul doesn’t just do what he’s asked. He thinks + suggests better approaches and often comes up with ideas that actually improve the product. When something needed to be adjusted or reworked. He adapted very fast and always stayed solution oriented.
On a personal level, he’s genuinely nice to work with. He listens and communicates clearly even takes the time to explain things properly. I also learned quite a lot from him along the way, both technically and in terms of how to structure a SaaS product in a smart and scalable way.
Technically he built the product on a solid and modern stack : React for the frontend, Supabase for the backend and database, Stripe for payments and subscriptions, OpenAI for smart features like quote generation and task suggestions, and Peppol integration for compliant electronic invoicing. Everything was implemented cleanly and thoughtfully with real attention to usability.
Overall, Abdul is a very strong developer who cares about what he builds. He’s reliable and easy to work with and clearly invested in delivering something that actually works for the end user. I’d happily work with him again he became my brother !!! And recommend him without hesitation.
MM
Muhammad Waseem M.
Apr 15, 2025
Flutter and Python Developer Needed for AI-Based Food Recognition Module (Fitmate App)
Abdul was awesome to work with! Super skilled, easy to communicate with, and delivered exactly what we needed for the Fitmate. Would happily work with him again.
SI
Sadia I.
Mar 8, 2025
MERN Stack Developer Needed | Medical Company Website | React, Node.js, MongoDB, SEO
Working with Abdul was a fantastic experience! He was highly skilled in MERN Stack and delivered exactly what I needed. His attention to detail, quick turnaround time, and ability to understand my requirements made the process smooth and efficient. He went above and beyond to ensure everything was perfect. I will definitely hire again for future projects!
About Abdul
FS AI SaaS & ERP/CRM Developer | APIs, Webhooks & Stripe Integration
100%
Job Success
Islamabad, Pakistan - 1:52 pm local time
👑 6+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 | 🙌🏻 5,800+ 𝗛𝗼𝘂𝗿𝘀 𝗪𝗼𝗿𝗸𝗲𝗱 | 🏆 50+ 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱
𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 & 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁 | 𝗦𝗮𝗮𝗦, E-commerce, 𝗘𝗥𝗣, CMS, LMS & 𝗖𝗥𝗠 (Zoho CRM) & Web Application Developer | 𝗔𝗜 Integration | 𝗦𝘁𝗿𝗶𝗽𝗲 Payment Integration | Email & WhatsApp API integration | Chatbots | Automation | Deluge programming | Node.js | React.js | 𝗡𝗲𝘅𝘁.𝗷𝘀 | Nest.js | 𝗣𝘆𝘁𝗵𝗼𝗻 | Laravel | SQL | mongoose | Webhooks | APIs | 𝗦𝘂𝗽𝗮𝗯𝗮𝘀𝗲 | 𝗟𝗼𝘃𝗮𝗯𝗹𝗲.dev | Peppol Integration | 𝗘𝗨 Compliance.
Me, 𝗔𝗯𝗱𝘂𝗹 𝗛𝗮𝗺𝗲𝗲𝗱, a Senior 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 𝟲+ years of experience in building high performance web and mobile applications. ME Abdul Delivered SEO-optimized, industry-recognized softwares from entry-level to enterprise solutions.
𝗦𝗸𝗶𝗽 𝘁𝗼 𝗯𝗼𝘁𝘁𝗼𝗺 𝗶𝗳 𝘆𝗼𝘂 𝗮𝗿𝗲 𝗻𝗼𝘁 𝗶𝗻𝘁𝗲𝗿𝗲𝘀𝘁𝗲𝗱 𝗶𝗻 𝗿𝗲𝗮𝗱𝗶𝗻𝗴 𝗱𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝘀𝗸𝗶𝗹𝗹𝘀
🔹 Languages & Backend
• JavaScript (ES6+), TypeScript, Python, PHP (Laravel)
• Node.js (Express, Fastify), Django, Flask, FastAPI
• REST APIs, GraphQL, WebSockets
• Microservices & Serverless Architecture
🔹 Frontend Frameworks & Libraries
• React.js, Next.js, Vue.js, Nuxt.js
• Tailwind CSS, MUI, Bootstrap
• Zustand, Redux Toolkit, React Query
• Framer Motion, Chart.js, Recharts
• Responsive & Component-based UI Design
🔹 Databases & ORMs
• MongoDB (Mongoose), PostgreSQL, MySQL
• Firebase, Supabase, Redis, PlanetScale
• Prisma ORM, Drizzle ORM
🔹 API Development & Integration
• REST APIs, GraphQL, WebSockets
• Node.js (Express/Fastify), Python (Flask/Django/FastAPI)
• Secure Auth (JWT, OAuth2), Rate Limiting, Versioning
• Peppol (Digiteal) API – UBL Invoice Automation
• Supabase API Integration
• Stripe, Mollie, Trolley Payment Integration
• Resend Email Setup
• Billit Integration, Other Third-party APIs
🔹 AI & Automation
• OpenAI API (ChatGPT, Whisper), LangChain
• Python (Pandas, NumPy, Scikit-learn)
• Automation Scripts & Webhooks, AI Chatbots
🔹 Cloud & DevOps
• AWS (EC2, S3, CloudFront, Elastic Beanstalk, Lambda)
• Docker, GitHub Actions, Vercel, Netlify
• CI/CD Pipelines, NGINX, PM2
• Server Monitoring & Performance Optimization
🔹 Design & UX
• Figma, Adobe XD, Canva
• Component-based design systems
• UI/UX Prototyping & Wireframing
🔹 Enterprise & Compliance
• ERP, CRM, CMS Development
• Peppol Integration, Billit Integration
• Eu Compliance & GDPR-ready Systems
• Peppol developer
• e-invoicing AS4 expert
• OpenPeppol integration
• UBL invoice
• XML invoice automation
• Odoo e-invoicing
• SAP invoice integration
• B2G e-invoicing compliance
What You Can Expect
• Clean, scalable, and maintainable code
• Mobile-first, responsive frontend architecture
• Fully documented APIs and project handovers
• Strong communication and timely delivery
• Long-term support and a product-oriented mindset
𝗬𝗼𝘂 𝗵𝗮𝘃𝗲 𝗮𝗻 𝗶𝗱𝗲𝗮? 𝗟𝗲𝘁'𝘀 𝗯𝘂𝗶𝗹𝗱 𝗮𝗻𝗱 𝗹𝗮𝘂𝗻𝗰𝗵 𝗶𝘁!
Steps for completing your project
After purchasing the project, send requirements so Abdul can start the project.
Delivery time starts when Abdul receives requirements from you.
Abdul works on your project following the steps below.
Revisions may occur after the delivery date.
Architecture & Schema Design
I will analyze requirements and design the database relationships and API endpoints.
API Development
I will set up the Express server and code the endpoints with proper validation.