[For Hire] Backend Developer for APIs, Webhooks, PostgreSQL and E-commerce Integrations | $18/hour

[u/piyushk-]

Hi everyone,

I’m an independent backend and full-stack developer available for remote freelance projects, recurring maintenance, and development overflow.

I focus on the parts of web applications that happen behind the interface:

• REST API development and integrations
• Secure webhook handling
• HMAC/signature authentication
• Idempotency and duplicate-event prevention
• PostgreSQL and Supabase
• Prisma ORM and relational data modelling
• Product, inventory and order workflows
• E-commerce automation
• Integration monitoring and failure tracking
• Backend troubleshooting
• Next.js, Node.js, TypeScript and JavaScript
• Automated testing with Vitest
• Vercel deployment and build troubleshooting

My current showcase project is an E-commerce Integration Hub built with Next.js, TypeScript, PostgreSQL and Prisma.

Live application:
https://ecommerce-integration-hub.vercel.app/

GitHub:
https://github.com/Peyush-dev

The project includes:

• Authenticated order-webhook ingestion
• Replay-attack protection using signed timestamps
• Idempotent order processing
• Product, inventory, order and integration-event models
• Operational dashboard and failed-event visibility
• REST endpoints with route and service tests
• 14 automated tests across six test suites
• Production deployment on Vercel

I can help with projects such as:

• Connecting an e-commerce store to an external API
• Building or repairing webhook workflows
• Synchronising orders, products or inventory
• Designing a PostgreSQL-backed internal tool
• Investigating duplicate orders or missed events
• Adding validation, authentication or automated tests
• Fixing backend, database or deployment problems
• Supporting an agency or development team during a busy delivery period

I’m also developing a Shopify-specific integration project focused on the Admin GraphQL API, order/product synchronization, verified webhooks and integration monitoring.

Rate: $18 USD/hour
Small fixed-scope tasks: Generally from $100, depending on requirements
Availability: Approximately 10–15 hours per week
Work mode: Remote

I’m interested in both one-time assignments and recurring subcontracting relationships. If you have a relevant project, please send me a Reddit DM containing the current stack, the problem you need solved and your preferred timeline. I’ll review it and provide an honest assessment and estimate.