Back end Development for Web and Mobile appsSelly Theresia
I build secure, production-ready backend APIs for web and mobile apps—from database design and authentication to file uploads, payments, and integrations. I focus on clean architecture, strong security, and fast, reliable performance with clear documentation and easy maintenance. You get a backend that’s scalable, well-tested, and ready to ship.
What's included
Backend API Development
Design and build secure, production-ready REST/GraphQL APIs. Includes database schema design, CRUD endpoints, validation, pagination, filtering, and clean error handling. Delivered with clear API documentation and example requests.
Database Design and Implementation
Create scalable database schemas with migrations, indexing, and query optimization. Includes relational (PostgreSQL/MySQL) or NoSQL (MongoDB) setup, data modeling, and performance tuning for real workloads.
File Upload and Storage Integration
Implement file/image upload flows with secure storage (Supabase Storage/S3), signed URLs, access policies, and metadata tracking. Includes validation (type/size), image processing (resize/compress), and CDN-friendly delivery.
Payment Integration Backend
Build backend services for Stripe/PayPal: checkout sessions, webhooks, subscription billing, invoices, refunds, and entitlement management. Includes webhook verification, idempotency, and audit logging.
Real-time Features and Notifications
Add real-time updates via WebSockets/SSE and notifications via email/SMS/push. Includes event-driven design, retry handling, and templates for transactional messages.
CI/CD and Deployment Setup
Set up automated testing and deployment pipelines (GitHub Actions), environment management, and monitoring. Includes production deployment to AWS/GCP/Vercel/Render, with logging, health checks, and rollback strategy.
Selly's other services
Contact for pricing
Tags
Django
JavaScript
Kajabi
Node.js
React
Backend Engineer
Frontend Engineer
Fullstack Engineer
Service provided by
Selly Theresia Banten, Indonesia
- 4
- Followers
Back end Development for Web and Mobile appsSelly Theresia
Contact for pricing
Tags
Django
JavaScript
Kajabi
Node.js
React
Backend Engineer
Frontend Engineer
Fullstack Engineer
I build secure, production-ready backend APIs for web and mobile apps—from database design and authentication to file uploads, payments, and integrations. I focus on clean architecture, strong security, and fast, reliable performance with clear documentation and easy maintenance. You get a backend that’s scalable, well-tested, and ready to ship.
What's included
Backend API Development
Design and build secure, production-ready REST/GraphQL APIs. Includes database schema design, CRUD endpoints, validation, pagination, filtering, and clean error handling. Delivered with clear API documentation and example requests.
Database Design and Implementation
Create scalable database schemas with migrations, indexing, and query optimization. Includes relational (PostgreSQL/MySQL) or NoSQL (MongoDB) setup, data modeling, and performance tuning for real workloads.
File Upload and Storage Integration
Implement file/image upload flows with secure storage (Supabase Storage/S3), signed URLs, access policies, and metadata tracking. Includes validation (type/size), image processing (resize/compress), and CDN-friendly delivery.
Payment Integration Backend
Build backend services for Stripe/PayPal: checkout sessions, webhooks, subscription billing, invoices, refunds, and entitlement management. Includes webhook verification, idempotency, and audit logging.
Real-time Features and Notifications
Add real-time updates via WebSockets/SSE and notifications via email/SMS/push. Includes event-driven design, retry handling, and templates for transactional messages.
CI/CD and Deployment Setup
Set up automated testing and deployment pipelines (GitHub Actions), environment management, and monitoring. Includes production deployment to AWS/GCP/Vercel/Render, with logging, health checks, and rollback strategy.
Selly's other services
Contact for pricing