Vivek Mangukiya
Freelance backend developer · Remote from India
Need backend help without hiring full-time? I take on freelance Node.js and TypeScript work — new APIs, database design, payment and email integrations, and rescuing backends that have become hard to change.
Why me
Freelance work only works when you can trust the result without supervising every line.
I've spent over three years building backends that handle real operations — bookings with availability rules, billing with GST and PDF invoices, donations with payment gateways and receipts, inventory across warehouses. As a freelancer I bring the same production habits to your project: clear data models, predictable APIs, and careful handling of money and permissions.
I'm deliberate about scope. Before work starts you get a written breakdown of what will be built, what won't, and how we'll know it's done. During the project you get regular updates and working code in your repository — not a big reveal at the end.
A clear list of deliverables before any commitment, so there are no surprises on the invoice.
Commits land in your Git repository from day one. You own everything written for the project.
Happy to sign an NDA before you share details, credentials or source code.
If the work isn't a good match for my skills, I'll say so quickly instead of learning on your budget.
Services
Short tasks, full builds, or ongoing help.
A complete Node.js / Express / TypeScript backend for your web or mobile app: data model, endpoints, auth and documentation.
Fix crashes, data inconsistencies and security gaps in an existing backend, with a written report of what was wrong.
Razorpay or other gateways with order creation, webhook verification, refunds and receipts handled properly.
Transactional email, PDF invoices and receipts, reminders and scheduled jobs.
New schemas, migrations between databases, indexes and query fixes for slow pages and reports.
An independent review of a backend you've been handed — what's solid, what's risky and what to fix first.
Selected work
Production systems handling bookings, payments and invoices — examples of the kind of work I take on.
Booking & CRM platform
Booking and CRM system for events, venues, staff, packages, leads and customer bookings — with availability checks and automated emails.
Billing & inventory
Billing and inventory platform with GST, multi-currency invoices, stock sync, Razorpay payments, PDF invoices and Excel reports.
Donation CRM
Donor CRM for collections, receipts, campaigns and staff roles — with Razorpay payments and reporting for day-to-day operations.
Process
Pick the model that fits the work — we can change it as the project evolves.
A defined feature or system with an agreed price and delivery plan. Best when requirements are clear.
A reserved block of time each month for ongoing features, maintenance and support on a live product.
Regular weekly hours embedded in your team, working through your tracker and code review.
A single bug, integration or audit — scoped and quoted on its own.
FAQ
Send a short description of the work, your stack and your timeline. I'll reply within one business day with questions or a next step.