Make Real
Make Real
Mahbub Rahman
Mahbub Rahman
Available for new projects

Build a Secure, High-Performance Fintech SaaS MVP

Bank-grade security. Startup-grade speed.

View My Work

EXECUTIVE SUMMARY

Mahbub Rahman builds secure, compliant, and scalable Fintech SaaS MVPs using Next.js, React, and robust backend architectures tailored for financial startups in the US.

The Technical Reality

Fintech applications cannot tolerate "move fast and break things." A dropped webhook or a race condition means lost money and ruined trust. I architect fintech systems with strict idempotency, encrypted payloads, and resilient background job queues (like Trigger.dev or BullMQ) to ensure financial state is never corrupted, even when third-party bank APIs fail.

WHY FOUNDERS COME TO ME

Trust is your product.You already know this.
THE EXPERTISE

Offshore agencies don't understand US compliance.

You need someone who understands the nuances of Plaid, Stripe Connect, ACH transfers, and PCI compliance. A generic agency will build a leaky bucket.

100% US-Focused
THE UX

You need a UI that feels like Stripe.

In fintech, trust is everything. If your app looks like a $50 dashboard template, users won't connect their bank accounts. It needs to look pixel-perfect and perform instantly.

Craftsman-level UX
THE INTEGRATIONS

Complex third-party APIs are failing.

Webhooks are dropping, idempotency isn't implemented, and race conditions are causing double-charges. You need a senior engineer to orchestrate financial data.

Zero dropped webhooks

WHAT I BUILD WITH

Financial primitives.No hand-offs required.

From database to deployment. I own the whole thing.

FRONTEND
Next.js 15
React 19
Tailwind CSS v4
FINTECH
Stripe Connect
Plaid API
Dwolla
BACKEND
Node.js
Secure Webhooks
Idempotency
DATA
PostgreSQL
Encrypted Data
Audit Logs

HOW IT WORKS

Security first.

We don't write a line of UI until the data flow is mathematically sound.

01

State & Architecture

Mapping the money

We define the exact state machine for your transactions, ensuring every financial event has a definitive source of truth and an audit trail.

02

Integration & Webhooks

The plumbing

We integrate Plaid, Stripe, or your chosen banking provider, setting up idempotent endpoints and webhook receivers that can handle network failures gracefully.

03

Trust-Inducing UI

The frontend

We build a fast, confident React frontend with skeleton loaders, clear error states, and a polished aesthetic that makes users feel safe entering their SSN.

PROVEN RESULTS

HuCapital
ReactNode.js

HuCapital

Social network for creatives and professionals with real-time features, content discovery, and AWS-scaled infrastructure.

Read Case Study→

COMMON QUESTIONS

Questions aboutalways ask me.

Building financial tools requires specific answers.

I ensure your application never directly touches raw credit card numbers. We use tokenization via Stripe Elements or similar providers. Your servers only ever process secure tokens, keeping you entirely out of PCI-DSS scope while maintaining a custom UI experience.

Yes. Dropped webhooks are usually a result of synchronous processing. I rewrite your webhook endpoints to immediately acknowledge receipt (200 OK) and push the payload to a reliable background queue (like Redis/BullMQ) for asynchronous processing with automated retries.

Yes, I regularly implement Plaid Link for auth, identity verification, and transaction syncing. I am familiar with their evolving API versions and how to handle edge cases like micro-deposit verifications.

READY?

Let's buildsomething real.

30 minutes. No pitch. No pressure. Just an honest conversation about your project and whether I can actually help.

✓ Free 30-min call✓ No commitment✓ You'll know after 1 chat