Abir Kolin

Selected work

Founder · AI · Open Source

Recalfy

An AI memory agent on Telegram and WhatsApp. Tell it things once, ask months later in your own words, and it messages you first when a reminder is due. No similarity search: the model reads your whole memory every time, so corrections stick. Hosted with Paddle billing, or self-host with one command.

Founder · Open Source

MockClub

Free mock interviews with real people rather than AI. Volunteer interviewers across 12 career tracks, matched by timezone and language, with structured written feedback.

Fun project · Three.js

Mirpur Drive

Walk, drive and ride the MRT Line 6 metro through a 3D Mirpur, Dhaka, built from OpenStreetMap and street-level reference. Rickshaws, cha stalls, live traffic, all in the browser.

Wisdomic AI

Founder · AI · ResearchArchived

Wisdomic AI

Research tooling that takes literature review from hours to seconds: structured paper breakdowns, APA, MLA and Chicago citations, and plagiarism detection. Second runner-up, DIU Agentic AI Competition.

Shikkha AI

AI · EducationArchived

Shikkha AI

Bangla-first tutor on a 4B model fine-tuned on NCTB textbooks. A RAG voice agent teaches over a plain phone call, no data needed. First place, National AI Hackathon.

Full StackArchived

DIU Academia Review

Anonymous faculty reviews for a 396-teacher department, with 890+ reviews, secure auth and profile pages. Sold an extended version to the university.

Scraping & data

Getting data out of platforms that would rather you didn't — reliably, at volume, and without burning accounts.

1. Instagram data API

   Production scraper for a creator-analytics platform

   An in-house scraping service that replaced paid third-party providers as the platform's main source of Instagram data.

   • 99.88% answered at 300 req/min over an hour
   • 63% less proxy traffic per request
   • p50 under 2 s

   • Python
   • FastAPI
   • HTTP/2
   • Redis
   • MongoDB

2. Daraz Bangladesh products & reviews

   Daraz.com.bd · published on Kaggle

   Six parallel browser tabs intercept the store's own listing API, since images never reach the DOM in a headless browser. Details come from a second internal endpoint, reviews from a third at twelve requests at a time, and the run saves its state after every category so it resumes where it stopped. Released as an open dataset with anonymized reviews and face-blurred photos.

   • 14,663 products
   • 47 categories
   • ~14,900 reviews

   • Python
   • Playwright
   • aiohttp
   • PostgreSQL
   • Cloudflare R2

   Dataset on KaggleSource on GitHub

3. HireLens AI

   Facebook job groups

   A job board that builds itself from the Facebook groups where Bangladeshi developer roles actually get posted. Each post is turned into role, skills, salary and location as structured data, duplicates are dropped, and it is searchable within minutes. Fifth place at Hack The AI.

   • Scraper
   • AI extraction
   • Digest emails

   Source on GitHub

Browser extensions

Manifest V3 extensions that work inside the page — reading what it already loaded rather than hammering the site.

1. FoodFeed Collector

   Chrome · Manifest V3 · Facebook groups

   Collects food-review posts from Facebook groups without making a single request of its own: it reads the responses Facebook's page already loads, which carry the full post even when the page truncates it. Handles Bangla, Banglish and English, archives images server-side before their signed links expire, and paces its scrolling like a person.

   • Zero requests of its own
   • Full post text, even when truncated

   • Vanilla JS
   • Node
   • MongoDB

   Source on GitHub

2. Instagram analytics extension

   Chrome · Manifest V3

   Built for a creator-analytics platform: ranks the posts on any Instagram profile by how well they performed.

3. RewindBug

   Chrome · Manifest V3

   Visual rewind for bug reports. Reproduce the bug, then replay the page with its network requests, console and clicks in sync, with an optional two-minute rolling buffer so you can rewind after it happens. It traces the likely cause from interaction to failed request to error, and exports to Markdown, HTML, HAR, GitHub, Jira or Linear. Everything stays local.

   • WXT
   • React
   • TypeScript
   • rrweb

   Source on GitHub

4. Wisdomic AI extensions

   Chrome

   Two iterations of a browser extension that brought Wisdomic AI's paper breakdowns and citations to the page you are reading.

   • JavaScript, then React

   First attemptReact rebuild

Experience

1. Recalfy

   Remote · Open source

   Founder

   Aug 2026 — Present

   An AI memory agent on Telegram and WhatsApp. Instead of similarity search, the model gets your whole memory on every message, so corrections and negations are read correctly rather than missed. Facts are stored atomically and a correction replaces the old one. Unprompted reminders, an expense tracker, and Paddle subscription billing across tiered plans; hosted, or self-host with one command.

   recalfy.comSource on GitHub

2. Viralspot AI

   Ontario, Canada · Remote

   Software EngineerFull-time

   Nov 2025 — Present

   • Next.js
   • NestJS
   • AWS
   • Claude Agent SDK
   • MCP

   Built the dashboard's AI agent on the Claude Agent SDK, with custom MCP tools it chains to answer analytics questions across reel data and uploaded CSV, JSON and audio files; it runs on AWS Lambda behind a NestJS API. Built the outlier-detection and competitor-analytics dashboards over Instagram and TikTok reels, with discovery feeds on MongoDB Atlas Search, and shipped a second product, Marketing Hub, end to end.

   viralspot.ai

3. MockClub

   Remote · Open source

   Founder

   Jul 2026 — Present

   Free mock interviews with real people, never AI. Volunteers run structured sessions across 12 career tracks, matched by timezone and language, and send written feedback afterwards. The codebase is open source so the service stays free for good.

   mockclub.com

4. SupeCoder.dev

   Remote

   Intern → Full Stack EngineerFour roles

   Jun 2024 — Dec 2025

   • Next.js
   • NestJS
   • Redux
   • SST
   • AWS App Runner

   Grew from part-time intern to full-time engineer, shipping job listings, mock interviews, interview scheduling, and a coding-practice and contest platform.

   supecoder.dev

5. DIU Academia Review

   Remote

   Founder

   Aug 2024 — Jan 2025

   A faculty review platform for Daffodil International University, built with Tuhin. 396+ teachers listed and 890+ reviews, with anonymous feedback, detailed profiles and secure auth.

   diuacademiareview.vercel.app

6. Daffodil International University

   Undergraduate ResearcherPart-time

   Jan 2024 — Jul 2024

Awards

1. First place, Education category

   National AI Hackathon · MillionX · Team Shikkha AI

   January 2026

   Source on GitHub

2. Fifth place

   Hack The AI · Green University · Team Merge Conflict

   September 2025

   Source on GitHub

3. Second runner-up

   DIU Agentic AI Competition · With Wisdomic AI

   April 2025

   Source on GitHub

4. Sold an extended DIU Academia Review to the university

   Dr. Imran Mahmud, Professor & Head of Software Engineering, DIU

   April 2025

5. Section champion, rank fifteen

   Takeoff Programming Contest · CPC

   May 2023