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Black-and-white portrait of Efaj Tahamid Rifat wearing a black mask
Rangpur, Bangladesh. Working with clients worldwide.

EfajTahamidRifat

I build software and AI, and I ship it. Fine-tuned LLMs, multi-agent pipelines, backends and APIs, web, mobile, watch and desktop apps, and the servers they run on.

Software developer & AI engineer · Founder & CEO of The Code Bros

Message me on WhatsApp See the work

My story

  1. Chapter 1

    The darkroom

    Every photograph starts as nothing: a blank sheet in a dark room, waiting for light. So did I.

  2. Chapter 2

    Trapped in the machine

    Then came the code. Builds that broke at 3am, errors I couldn't read, tutorials that stopped working halfway. For a while, the software owned me.

  3. Chapter 3

    Breaking out

    I stopped fighting the code and started designing systems. One project, then ten, then more than two hundred. The walls came down.

  4. Chapter 4

    The AI Godfather

    Then I started building things that think: agents that plan, research, write code and check each other's work. I don't just write software anymore. I raise it.

  5. Chapter 5

    Toward superintelligence

    Every system I ship is a step toward AI that's smarter than the problems we hand it. That's where I'm heading, and I'm taking my clients with me.

    Build it with me

Contact sheet

Four recent builds, from first sketch to live product. The circled frame is the one I'm working on right now.

Most of my 200+ projects are private client work. Ask and I'll show you something close to what you need.

Things I make for myself

  • Neptuv

    Live on Ethereum & Base

    Know your agent. A trust score for AI agents built on ERC-8004: who rated an agent, who checked its work and how long it has existed, turned into one score from 0 to 100.

    neptuv.xyz

  • Unora

    In closed testing on Google Play

    One app for every student tool. Offline-first, made for Android. Free to try for 7 days, then a one-time Pro unlock.

    Privacy policy

  • Dr Expens

    Coming to Google Play

    Your personal expense doctor. Track income and spending offline, with no account and nothing sent to a server.

    Privacy policy

  • The Code Bros

    My agency

    A software, AI and automation agency. When a project needs a team instead of one engineer, this is where it goes.

    thecodebros.xyz

Open source

Code I give away. MIT licensed, free to use, fork and build on.

  • erc8004-agent-auth

    Python & JavaScript · MIT

    Know which AI agent is calling your API. A small open standard and two reference libraries: agents sign each request with their ERC-8004 identity, and servers check it against the on-chain registry. No API keys, no middleman.

    View on GitHub

  • Parallux

    Claude Skill · MIT

    A Claude Skill that builds cinematic, scroll-driven websites: Lenis smooth scroll, GSAP timelines, WebGL image distortion, particle fields and magnetic cursors, with stock photos sourced automatically.

    View on GitHub

  • WebLab

    Android · Kotlin · MIT

    Turns an Android phone into a web-development workstation: a code editor, live preview, real terminal and npm package management, all running on-device.

    View on GitHub

More on GitHub →

Efaj Tahamid Rifat covering half his face with one hand, lit from the side

How I got here

I started where most AI builders start: deep inside language models, tuning prompts and wiring together the first multi-agent frameworks. Now I build the whole thing, from the AI backend to the interface people actually touch.

  1. 2024

    Inside the models

    LLM tuning, prompt pipelines and my first multi-agent pipeline in production.

  2. 2025

    Full-stack software

    Started building the products around the agents: backends, web apps, WebGL and GSAP interfaces, Telegram bots and Android apps.

  3. 2026

    Independent, then a team

    Went full-time with direct clients, then founded The Code Bros to take on projects bigger than one person.

What you can hire me for

AI engineering

Multi-agent systems with CrewAI, AutoGen, LangChain and LlamaIndex, and Model Context Protocol integrations. RAG pipelines and vector search with Pinecone and Milvus. Vision and OCR, voice agents with Whisper and ElevenLabs, and AI chatbots and Telegram bots for businesses.

LLM fine-tuning

Fine-tuning open models on your own data so they speak your domain, follow your format and cost less to run. Dataset preparation, LoRA and QLoRA training, evaluation, and serving the model behind your API or locally.

Software & backend

APIs, backends and full products. Python, Flask and FastAPI, Node.js and Go on the server; Next.js, React and Vue on the front. Docker, CI/CD and hosting on Vercel, Render, Railway or AWS.

Apps on every screen

Android and iOS apps, Wear OS watch apps, and desktop apps for Windows, Linux and macOS. Built with Kotlin and Jetpack Compose, React Native and Tauri, ready for Google Play and the App Store.

  • Android
  • iOS
  • Wear OS
  • Windows
  • Linux
  • macOS

Ways to work together

Sprint

From $150

Two focused weeks on one clear deliverable: an MVP, a fine-tuned model, a chatbot, a bot or a feature. Daily progress updates.

Start a sprint

Architecture

Scoped per project

End-to-end design and deployment of production multi-agent systems, fine-tuned models, vector infrastructure and pipelines, with ongoing support.

Discuss scope

Partnership

Early-stage only

Technical co-founder or advisory roles with early-stage AI startups I believe in.

Introduce your idea

Need something smaller? I also build standalone Telegram bots and AI chatbots with no minimum.

Tell me what you're building

I reply with next steps, not a sales pitch.

+880 1748 305640