You will get a production NestJS REST API with auth, PostgreSQL,
Project details
You get a production-ready NestJS backend, JWT auth, PostgreSQL database, Docker setup, and GitHub Actions CI/CD, deployed and ready for your frontend to connect. The same foundation I used at UpKeep, Emtec, RentBase, and Mastery Logistics.
Programming Languages
PHP, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Localization, SecurityWhat's included
| Service Tiers |
Starter
$400
|
Standard
$1,200
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 4 days | 10 days | 21 days |
Number of Revisions | 3 | 5 | Unlimited |
Number of Pages Mined/Scraped | 10 | 20 | 29 |
Number of Sources Mined/Scraped | 20 | 40 | 60 |
Install Script | |||
Test Script | - | ||
Task Automation | - | - |
Frequently asked questions
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RM
Rajesh M.
Sep 8, 2023
Build a website landing page and notification template
RM
Rajesh M.
Sep 6, 2023
Build Payment widget and Admin panel for Merchants and Internal Admins
About Vimal
Senior SaaS & Payment Engineer | React, Next.js, Node | Test-Driven
Surat, India - 1:25 pm local time
Most founders I work with were burned once already. A contractor shipped something that demoed well, then auth leaked, a payment webhook fired twice, and the next developer refused to open the codebase. I build the opposite of that: production-grade software, with tests that prove it works before your users ever see it.
I work best with founders and CTOs who need one senior engineer to own a build end to end, frontend and backend.
➡ 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃 :
𝟭. 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗮𝗻𝗱 𝗰𝗿𝘆𝗽𝘁𝗼 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀. Stripe and gateway integration, checkout widgets, merchant dashboards, admin consoles, webhook handling. Built for the edge cases that cost real money: double-charges, failed webhooks, refund states. (Rampnow: 160+ countries, 1,500+ tokens, 60+ blockchain networks, 4 modules, 1 engineer.)
𝟮. 𝗙𝘂𝗹𝗹 𝗦𝗮𝗮𝗦 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀, front to back. React and Next.js frontends, Node.js and NestJS APIs, PostgreSQL and MongoDB. Auth that does not leak, role-based access that holds, data that stays consistent under load.
𝟯. 𝗔𝗱𝗺𝗶𝗻 𝗽𝗮𝗻𝗲𝗹𝘀 𝗮𝗻𝗱 𝗱𝗮𝘀𝗵𝗯𝗼𝗮𝗿𝗱𝘀. Real-time data, CRUD, role permissions, audit logs. The internal tools your team runs the business on.
𝟰. 𝗖𝗼𝗱𝗲 𝗿𝗲𝘀𝗰𝘂𝗲 𝗮𝗻𝗱 𝘁𝗲𝘀𝘁 𝗰𝗼𝘃𝗲𝗿𝗮𝗴𝗲. A slow, buggy, or AI-generated codebase that breaks under traffic? I audit it, stabilize it, and wrap it in real tests so it stops breaking.
➤ 𝐑𝐄𝐂𝐄𝐍𝐓 𝐖𝐎𝐑𝐊 𝐘𝐎𝐔 𝐂𝐀𝐍 𝐕𝐄𝐑𝐈𝐅𝐘:
• 𝗥𝗮𝗺𝗽𝗻𝗼𝘄 : sole frontend engineer on a global crypto on/off-ramp platform. Built all four modules solo: landing page, checkout widget, merchant dashboard, internal admin console.
• 𝗨𝗽𝗞𝗲𝗲𝗽 : I contribute across frontend and backend on a US enterprise SaaS used by thousands of businesses. Release engineer on zero-downtime deployments, Leader of the Month twice.
• 𝗦𝘁𝗿𝗶𝗻𝗴𝗘𝗥𝗣: architected an enterprise ERP from the first database schema. 99.98% data integrity, new-module integration under 10 minutes, with a microservice spun out as its own product.
• (𝗻𝗼𝘁)𝗟𝗼𝗰𝗼 : designed and built a live mental-health platform from Figma to production.
What a client said: "Delivery is always on time and high quality. The kind of engineer who makes the whole team move faster." (Vidur S., Head of Product)
➤ 𝐖𝐈𝐋𝐋 𝐈𝐓 𝐁𝐑𝐄𝐀𝐊 𝐈𝐍 𝐏𝐑𝐎𝐃𝐔𝐂𝐓𝐈𝐎𝐍?
No, and here is why. I treat testing as part of building, not a step at the end. Cypress and Jest for unit and integration, Playwright for end-to-end, k6 and JMeter for load. Every feature has tests before it goes to review. That is the difference between code you hope holds up and code you can prove does.
I also build with AI the right way. At UpKeep I took my sprint output from 16 to 30+ story points using Cursor and AI-assisted review, same quality bar, and placed 3rd in the company's internal AI hackathon. Fast, without the throwaway code.
➤ 𝐐𝐔𝐄𝐒𝐓𝐈𝐎𝐍𝐒 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐀𝐒𝐊 𝐌𝐄 :
How do you handle project communication?
I work async-first and reply within a few hours during US overlap. You get daily progress on Slack or your tool of choice, clear pull requests, and a short Loom when something needs showing rather than telling.
Can you work with my existing codebase?
Yes. I start with a short audit, send you a written plan, then integrate into your repo. React, Next.js, Node.js, and NestJS are home turf, and I am comfortable inheriting messy or AI-generated code.
How do you make sure the code won't break after launch?
Tests before review, on every feature. Cypress, Jest, Playwright, and k6 for load, plus CI/CD so the checks run on every push, not just on my machine.
How fast can you start, and what is your availability?
I take focused blocks of 10 to 20 hours a week and can usually start within a few days. Every milestone has buffer built in, and my record is no missed deadlines.
Do I own the code?
Yes. Full ownership on delivery, pushed to your repo and documented so the next developer is not lost.
➩ 𝐓𝐄𝐂𝐇 𝐈 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 :
• Frontend: React, Next.js (App Router, SSR), TypeScript, Redux, Tailwind CSS, MUI
• Backend: Node.js, NestJS, Express, REST, GraphQL, microservices, RabbitMQ
• Payments: Stripe, payment gateway APIs, webhooks, crypto on/off-ramp
• Databases: PostgreSQL, MongoDB, MySQL
• Testing: Cypress, Jest, Playwright, k6, JMeter
• Cloud and DevOps: AWS (Lambda, S3, SQS), Docker, CI/CD, GitHub Actions, Vercel
If you are building or fixing a SaaS or payment product in the next 90 days, send me one or two lines about it. I will tell you honestly whether I am the right fit and what I would do first. No charge for that.
- Vimal Desai
Senior Full-Stack Developer | React, Next.js, Node.js | SaaS & Payments
Steps for completing your project
After purchasing the project, send requirements so Vimal can start the project.
Delivery time starts when Vimal receives requirements from you.
Vimal works on your project following the steps below.
Revisions may occur after the delivery date.
Core Vision & Target Audience
🔹 Define the primary goal of this MVP in 2-3 sentences 🔹 Identify the exact target user and their main problem 🔹 Ensure alignment on the core business problem this app solves on Day 1
UI/UX Designs & Wireframes
🔹 Share links to existing Figma, Adobe XD, or wireframe files 🔹 Provide 2-3 reference apps if no custom designs exist yet 🔹 Confirm layout preferences and core user flow expectations