Software engineer with 4+ years building REST APIs, admin dashboards, and workflow automation across B2B SaaS platforms and freelance client work. Currently focused on LLM-assisted products — AI nutrition tracking, voice-to-text SaaS, automation agents — alongside full-stack Django/Laravel/Node work.

• 🎓 BSc in Computer Science & Engineering — Institute of Science and Technology, National University (Dec 2019 – Jan 2026), CGPA 3.13
• 🚀 Open to full-time roles — currently part-time @ Vendy Ltd + ongoing freelance work
• 🐧 Linux Enthusiast (Manjaro) · 🔒 CTF Player · 🚲 Cycling

🔭 Currently building: KathaSync — a Bangla/English/Banglish voice-to-text SaaS with LLM-assisted summarization and meeting notes.

Software Engineering Specialist (Part-time) | Jan 2026 – Present at Vendy Ltd — Dhaka, Bangladesh

• Built an employee self-service leave-cancellation module (Laravel) for Vendy's HRM platform, cutting HR admin ticket overhead by 40%
• Built a ReportingHierarchy service with cascading manager updates, AJAX tree admin views, and broken-manager detection
• Integrated bKash and aamarpay payment gateways with REST callback verification for live and sandbox transactions
• Implemented /verify-card and /postTransaction REST endpoints for Vendy's JolTM device-telemetry platform

Freelance Developer | Oct 2021 – Present

• Delivered Django/Flask REST APIs and web apps for SMB clients, cutting manual-process effort by ~90% per engagement
• Built Telegram-bot automation and scraping pipelines scheduled via GitHub Actions, cutting routine admin time by ~88%
• Shipped Flutter apps to the Google Play Store, paired with Django/Flask backends on Docker-ready AWS/GCP/DigitalOcean/Azure hosts

Jr. Software Developer | Jan 2023 – Jan 2024 at Onutative — Uttor Badda, Dhaka, Bangladesh

• Optimized a slow PHP/CodeIgniter MySQL query path, dropping page-load time by 92% and removing a long-standing bottleneck
• Diagnosed a cPanel email misconfiguration delaying inbound delivery and cut average incoming email reception time by 80%

KathaSync — Bangla/English/Banglish Voice-to-Text SaaS

Users record or upload audio and get LLM-assisted transcription plus smart notes, summaries, meeting minutes, and translation. Credit-based billing with bKash SMS verification, phone OTP, admin console, and large-file Meeting Mode via R2/GCS + Cloud Run async jobs.

Tech: React 18, TypeScript, Vite, Tailwind, Supabase, Deno Edge Functions, Cloudflare R2, Cloud Run

🔗 Live · 📋 Showcase 🔒 Source private (commercial SaaS)

Rayyan Group Business Suite — B2B Operations Platform

Four Django web applications and a brand portal for B2B operations: farm management, retail Feed Store POS with FIFO inventory, FMCG distribution with multi-company data isolation, and cashbox/profit reporting dashboards.

Tech: Python, Django, MySQL, Docker, Coolify, Cloudflare R2

🔗 Live · 📋 Showcase 🔒 Source private

JoinTeamHunt — Hunting-Team-Matching Platform (Client Rebuild)

Rebuilt hunting-team-matching platform with hunter profiles, unit-tag team pairing across 11 US states, real-time chat and forums, map-based discovery, and Stripe checkout — replacing the prior WordPress/BuddyBoss stack.

Tech: React 19, TypeScript, NestJS, Fastify, Prisma, PostgreSQL, Socket.io, Mapbox GL, Stripe

📋 Showcase 🔒 Source private (client project)

ProCal — AI Nutrition Coach

Tracks meals via photo, voice, or text using OpenAI-powered food recognition. Delivers personalized meal plans, smart reminders, and Firebase-backed sync, plus a companion Telegram bot for chat-based logging.

Tech: Flutter, Dart, OpenAI API, Firebase, speech_to_text, Telegram Bot API

🔗 Live · 📱 Google Play · 📋 Showcase 🔒 Source private (part-time role, owned by employer)

WhatsApp Message Summarizer — Nightly AI Digest Agent

Scheduled agent that summarizes daily WhatsApp conversations and emails a separate digest per chat thread, using Gemini multimodal analysis across text, voice, image, and video messages.

Tech: Python, Gemini multimodal, scheduled email delivery

🔗 Repo (public) Built as an internal office tool — confirm stakeholder OK before citing in applications.

AI Email Task Automation — Gmail-to-Notion Triage Agent

Push-driven Pub/Sub webhook converts incoming Gmail messages into structured Notion Kanban cards, with Gemini-assisted classification, thread deduplication, and retry guardrails.

Tech: Python, FastAPI, Gmail API, Pub/Sub, Notion API, Telegram Bot API, Coolify

🔗 Repo (public) Example Notion project names in the public copy are fictional placeholders.

Public pins and related work (see profile pins for the primary set):

sabit.dev/#projects · my-projects-so-far.sabit.dev · github.com/ms-jahan?tab=repositories

View on LinkedIn

• GitHub Foundations — GitHub, Apr 2024 (expires Apr 2027)
• Google Cybersecurity Certificate — Coursera, Jun 2023
• Fundamentals of DevOps — KodeKloud, Sep 2024
• DevOps Pre-Requisite Course — KodeKloud, Sep 2024
• Full Stack Web Development with Python & JavaScript — Bohubrihi, Mar 2024
• Android App Development — NACTAR, Dec 2020

• ICPC Asia Dhaka Regional Contest 2024 — solved 2 problems for the team
• CyberRaid CTF 2025 (Bangladesh Army) — 7th preliminary, 22nd final
• BUET CTF 2024 — 22nd
• East West University NRF 24 CTF — 10th
• Phoenix Summit CTF 2024 — 10th of 100 (final round)
• Zelf Hackathon 2.0 (2024) — 3rd, Data Scraping category
• MIST LeetCon 2023 — HackMeIfYouCan CTF finalist
• NASA Space Apps Challenge 2020 — team OrionVI, GreenX

• 🌐 Portfolio: sabit.dev
• 📧 Email: [email protected]
• 💼 Upwork: mdsarwarjahansabit
• 👔 LinkedIn: mdsarwarjahan-sabit
• 💻 GitHub: ms-jahan
• 🐦 Twitter: @MS_Jahan_Sabit