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The NLB Academy
The developer

Built by
Mujahid Al Mahi.

Every page of The NLB Academy — the projector, the stage, the letters that rain into a map — was designed and engineered by Mahi.

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Hello, world

I enjoy understanding how software works under the hood, and building things from the ground up. 

Learning Software Systems Engineering, with a pull towards distributed systems, database engineering, security, networking and data-intensive design. From low-level software to full-stack SaaS, driven by curiosity: build, break, figure out why.

    01Distributed systems
    02Database engineering
    03Software security
    04Computer networking
    05Low-level software
    06SaaS products
Step inside MahiOS, his portfolio
Mujahid Al Mahi, formal portrait
“Simplicity is prerequisite for reliability.”
Edsger W. DijkstraThe line he builds by
How he builds

Four rules.
No exceptions.

Step 01 / 04

Own the stack

Don't treat abstractions as magic; understand the machine beneath.

Step 02 / 04

Learn by breaking

You only understand a system once you know exactly how it fails.

Step 03 / 04

Zero trust

Defend the runtime, not just the front door.

Step 04 / 04

Ship real things

Low-level precision, real-world execution.

Shipped

Things he
has built.

    01DoctorOS BDHealthcare platformAn enterprise-grade platform that runs a Bangladeshi doctor's whole clinical day: patients, queues, consultations, prescriptions, follow-ups and drug-interaction checks, with security and privacy treated as first-class. Eight months and close to a lakh lines of code.Next.js · NestJS · PostgreSQL · Supabase · Cloudflare · Sentry
    02Behind The AppEngineering publicationFollows a single tap through DNS, CDN, load balancers, services and databases to reveal the engineering behind the apps people use every day — and what breaks between one user and a million.Next.js 16 · TypeScript · Supabase · Cloudflare
    03MahiOSPortfolio operating systemA personal autobiography built as an interactive operating system: windows, a terminal, a paint studio and a living archive of projects and life events, with its own admin system.Next.js 16 · TypeScript · Tailwind CSS · Supabase
    04PendushWindows USB utilityA fast, offline-first Windows x64 tool for USB management and bootable media, by PinkDotHash. Small enough to understand, useful enough to keep, reliable enough to trust.C++ · Win32 · CMake · GitHub Actions
    05TextorNative text editorA lightweight plain-text editor for Windows in pure C on the Win32 API: line numbers, themes, shortcuts, no frameworks.C · Win32 · CMake
    06Go-ResumeResume builderClean templates and easy customisation that turn a career into a polished resume in minutes.Next.js 16 · TypeScript
Toolkit

What he
works with.

Languages

  • JavaScript / TypeScript90%
  • C / C++85%
  • Java75%
  • Python65%

Full-stack

  • Git / GitHub90%
  • React / Next.js87%
  • Node / NestJS86%

Data & systems

  • PostgreSQL / Supabase90%
  • Cloudflare82%
  • Docker77%
  • Redis70%

Security & networks

  • OWASP60%
  • Burp Suite60%
  • TCP/IP50%

Adopt

PostgreSQL & transaction internals

MVCC, query planning, pooling

Trial

C/C++ systems & concurrency

RAII, atomics, POSIX

Evaluate

LSM-tree storage engines & WAL

Compaction, Bloom filters, recovery

Explore

Raft consensus

Elections, replication, failover

The story so far

Three
chapters.

2005 – 2016 · Brahmanbaria · Narayanganj

Where it all began

A talkative village kid from Bholakot who once got lost on a three-wheeler at four. Cricket, remote-control cars, GTA: Vice City — and, at seven, a first fascination with computers, sparked by an uncle who was a software engineer.

Curiosity shaped my path.

2017 – 2024 · Narayanganj · Dhaka

The years that shaped me

Learned web development during COVID — starting with a Java book bought by mistake for JavaScript, then W3Schools, then coding on his mother's phone when the computer died. Lost his father in 2021. Studied at Notre Dame College, and found his way to CSE.

Life doesn't always follow the path you planned, but the right opportunity can still find you.

2025 – now · Narayanganj · Khulna

Finding my path

Studying CSE at Khulna University and going deeper — databases, distributed systems, security, networking. At 21, founder of Akruno, the company behind DoctorOS BD, Behind The App, MahiOS and Pendush.

I want to create my own path and define success on my own terms.

Education

  • Khulna University

    B.Sc. in Computer Science & Engineering · 2025 – 2029

  • Notre Dame College

    HSC · GPA 5.00 · 2023 – 2024

  • B.M. Union High School

    SSC · GPA 5.00 · 2017 – 2022

Honours

  • 2nd Runner-up, National Biology Olympiad (2023 & 2024)
  • National candidate, National Earth Olympiad Bootcamp
  • 5+ open-source projects

Languages

  • BanglaNative
  • EnglishProfessional
  • HindiConversational
  • ArabicBasic
Say hello

Have something
worth building?

mujahidmahi.official@gmail.com