SERVICE 07 / BACKEND & API DEVELOPMENT

Need a NestJS developer for your backend?

I build complete backends in NestJS on PostgreSQL and Redis — auth, payments, background jobs and real-time — sized for the users you have and the ones you’re planning for.

STACKNESTJS · NODE.JS · POSTGRESQL · REDIS · SOCKET.IO · DOCKER

FROMDHAKA · WORKING WORLDWIDE

SHOWREEL — BACKENDS & APIS

01 / 06 — CLICK A CHAPTER TO JUMP

How a backend I build fits together, in 40 seconds — the API and database, sign-in and roles checked on every request, verified payment webhooks, background queues with retries, live updates, and room to scale.

WHAT YOU GET

Complete NestJS backends — at Cleverlyy, 50+ modules and 145 API endpoints serving 4,000+ users at 99% uptime.

Authentication that holds up: JWT, MFA and role-based admin levels.

Real-time features on WebSockets and Socket.IO, and state machines for multi-step workflows such as Bravo Secure’s protection missions.

Payments, wallets, escrow and payouts built into the data model.

PostgreSQL schemas, Redis caching and S3 file storage.

Tests and CI with Jest and GitHub Actions, packaged with Docker.

PROOF — SHIPPED IN PRODUCTION

03.4 / CASE STUDY

Cleverlyy

The complete backend: 50+ modules, 145 endpoints
4,000+ users at 99% uptime
1–3 business-day feature turnaround

READ THE CASE STUDY

03.1 / CASE STUDY

Bravo Secure

Mission session state machine
Escrow, payouts and multi-currency wallet
~1,430 tests — coverage 51% → 74%

READ THE CASE STUDY

HOW IT WORKS

01Tell me the ideaEmail or WhatsApp a few lines about what you want built. I usually reply within a day.

02Scope the first versionWe agree what the first release must do, the stack, and how we’ll know it works.

03Build with regular demosYou see working software early and often — not a big reveal at the end.

04Launch and keep goingIt ships, real users arrive, and we keep building on what they do.

QUESTIONS PEOPLE ASK

Can you build the whole backend for my app?

Yes — that is what I did for Cleverlyy: the complete backend, 50+ modules and 145 API endpoints, working directly with the CTO on architecture and the roadmap.

How do you keep a backend reliable?

Tests around the risky paths and a regression test for every fixed bug. On Bravo Secure that meant about 1,430 tests and coverage rising from 51% to 74%.

Do you work with clients outside Bangladesh?

Yes. I work remotely with clients in the UAE, South Africa and the UK from Dhaka (GMT+6) — in English, with regular demos.

How do we start?

Email hello@ranak.bio or message me on WhatsApp with a few lines about the project. I usually reply within a day.

Tell me what to build.

hello@ranak.bio WHATSAPP