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English
$
USD
I will be your full stack developer with react python fastapi and nodejs
Mahmudul Alam
Level 2
1 order in queue
5.0
5.0
Gig Summary
About this gig
Full stack developer, 7 years on production systems. Payments are my
specialty: Stripe subscriptions, metered billing, marketplace payouts,
crypto rails with KYC. Webhooks that survive retries and duplicates.
Not prototypes that fall over at 100 users.
WHAT I BUILD
- Django, FastAPI, Next.js and Node apps end to end: backend, frontend,
database, deployment
- REST and GraphQL API development, plus third party API integration
- Business tools: inventory management, reporting, dashboards, automation
- Rescue work: slow queries, memory leaks, crashes under load, codebases
another dev left rough
START SMALL
Basic is one feature done properly: an endpoint, an integration, a bug
that has sat there for months. Most of my long term clients started that
way. Bigger builds go through a custom offer, so message me either way.
HOW I WORK
I scope before I quote. If your idea is too big for the budget, I'll tell
you which 20% to build first. Working software at each milestone, not one
delivery at the end.
Tell me what you need built or fixed and I'll tell you what it actually takes.
Get to know Mahmudul Alam
Mahmudul Alam
Senior engineer building payment systems, APIs and web applications
Level 2
- FromBangladesh
- Member sinceFeb 2019
- Avg. response time2 hours
- Last delivery1 week
Languages
Bengali, English
Senior engineer, 7+ years. I build payment systems, card and crypto, with KYC compliance built in.
Recent: Stripe and crypto on/off-ramp flows for a crowdfunding platform serving Brazil's creator community. Payment rails and KYC for a Japanese e-commerce ecosystem. Backend lead on a micropayments app. A crashing production endpoint rewritten 3.4x faster.
Python (Django, DRF, FastAPI), Node.js/TypeScript (Express, NestJS), React, Next.js, PostgreSQL, AWS.
Tell me what you need built or fixed. I'll tell you exactly what it takes.
Among my clients
iTrade5®
Connecticut Polar Bears
My Portfolio
FAQ
Can you integrate payments?
Yes, it's a specialty. Stripe checkout, subscriptions, metered billing, marketplace payouts, and webhook handling that survives retries and duplicates. I've also built crypto payment rails with KYC verification for platforms moving real money. Tell me what you're charging for and how, and I'll scope
Do you work with existing codebases or only new projects?
Both. I regularly fix, refactor, and extend existing Django, FastAPI, Node.js, and React projects — including ones other developers left in rough shape. Project rescue and codebase cleanup are some of my most-requested services on Fiverr.
What tech stack do you use?
Backend: Django, DRF, FastAPI, Flask, Node.js (Express, NestJS, Hono). Frontend: React, Next.js, TypeScript, Tailwind, Redux. Database: PostgreSQL, MongoDB, MySQL, Redis. DevOps: AWS, Vercel, DigitalOcean, Docker. I pick the right stack for your project, not just my favorite one.
What if my project is bigger than your Premium package?
Send me your requirements and I'll create a custom offer for larger MVPs, multi-month builds, or ongoing retainers. Many of my biggest projects started as custom offers rather than standard packages. There's no upper limit on what I can build.
I have an idea but no clear specs. Can you still help?
Absolutely. Send me whatever you have — a description, a sketch, a Figma link, or even a competitor website. I'll help you shape it into a clear scope, recommend the right stack, and send a custom quote within an hour. Most of my best projects started this way.
Will I own the code?
100%. You get full source code, full ownership, and clear documentation on delivery. Nothing is locked behind my accounts, and there are no hidden dependencies on services you don't fully control. The code is yours.
Can you handle deployment too?
Yes — AWS, DigitalOcean, Vercel, Railway, or your preferred host. I set up the production environment, domain, SSL, environment variables, and CI/CD pipeline. Your app goes live, working, and ready for real users without you touching the server side.
Do you offer support after delivery?
Yes. The Premium package includes 14 days of post-launch support free. Beyond that, I offer a 30-day support add-on or monthly subscriptions for ongoing development at up to 15% off — perfect for startups needing a developer on call long-term.
Reviews
110 reviews for this Gig
| (108) | ||
| (2) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
C ctpolar
United States
Ongoing collaborationAwesome job and easy to work with!
$400-$600
Price
8 days
Duration
D 
Seller's Response
Helpful?C 
cool4trade
United States
Ongoing collaborationGreat working with the seller. He is a true professional and an excellent developer. Happy to recommend to anyone.
$100-$200
Price
8 days
Duration
D Seller's Response
Helpful?K kelly_frias
United States
Ongoing collaborationHe handled the custom inventory app with strong professionalism. He quickly understood the requirements and delivered ahead of schedule. Communication remained smooth and straightforward throughout the process. I’m very satisfied with the overall quality of his work.
$50
Price
4 days
Duration
D Seller's Response
Helpful?W wynter_rave
United States
Ongoing collaborationMahmudul delivered excellent custom work with added features like barcode scanning and weekly email reports. He handled everything smoothly without any hassle. The final app matched the agreed scope perfectly. Professional, responsive, and very reliable throughout.
$50
Price
3 days
Duration
D Seller's Response
Helpful?C cool4trade
United States
Ongoing collaborationNice working with the seller on a big project. He is now part of the team
$200-$400
Price
2 weeks
Duration
D Seller's Response
Helpful?
Reviews
110 reviews for this Gig
| (108) | ||
| (2) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
C ctpolar
United States
Ongoing collaborationAwesome job and easy to work with!
$400-$600
Price
8 days
Duration
D Seller's Response
Helpful?C cool4trade
United States
Ongoing collaborationGreat working with the seller. He is a true professional and an excellent developer. Happy to recommend to anyone.
$100-$200
Price
8 days
Duration
D Seller's Response
Helpful?K kelly_frias
United States
Ongoing collaborationHe handled the custom inventory app with strong professionalism. He quickly understood the requirements and delivered ahead of schedule. Communication remained smooth and straightforward throughout the process. I’m very satisfied with the overall quality of his work.
$50
Price
4 days
Duration
D Seller's Response
Helpful?W wynter_rave
United States
Ongoing collaborationMahmudul delivered excellent custom work with added features like barcode scanning and weekly email reports. He handled everything smoothly without any hassle. The final app matched the agreed scope perfectly. Professional, responsive, and very reliable throughout.
$50
Price
3 days
Duration
D Seller's Response
Helpful?C cool4trade
United States
Ongoing collaborationNice working with the seller on a big project. He is now part of the team
$200-$400
Price
2 weeks
Duration
D Seller's Response
Helpful?
