FILE: 00_HERO.LOGOVER 1.0
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Md. Kawsar Ahmed

Software Engineer · Data Science · Cumilla, Bangladesh

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Md. Kawsar Ahmed

Cumilla, Bangladesh

[01]

About

I'm a language-agnostic engineer with experience across the stack. My journey began with frontend development, and I'm now deep in the world of backend systems. I primarily work with JavaScript, while staying sharp in Python and actively learning DevOps. I choose stacks by fit — not by familiarity — and care more about correctness, observability, and shipping than about the next shiny thing.

I'm a competitive builder: multiple National Hackathon Championships across Bangladesh (UAP Innovatex, NSU Tech Fest, DevFest AI) and a track record of shipping under pressure. I thrive in 24–48 hour windows where the deadline forces real architectural decisions instead of polish.

Beyond code, I've led teams of up to 7 engineers, coached 100+ students, and organized hackathons and CSE fests at university scale. I believe software is a team sport — clarity, mentorship, and shipping beats lone-wolf heroics every time.

I build systems that handle real load, store real money, and survive real outages — and I write them so the next engineer can read them.
[02]

Skills

Domains

10

Tools

48

[01] Active lane

Programming

4 capabilities

  • JavaScript
  • Python
  • C/C++
  • SQL

10 domains · 48 tools · swipe lanes

JavaScriptPythonC/C++SQLNode.js (Express.js, Hono.js)Next.jsDjangoFastAPIMonorepoTurborepoMicroserviceModularPostgreSQLSupabaseNeonMongoDBRedisDockerGitHub ActionsAWSVPSOpenTelemetryPrometheusGrafanaLokiRabbitMQBullMQHTMLCSSComponent LibraryNext.jsAxiosTanStackGitGitHubDockerTrelloNotionRenderClerkVercelLinuxPrompt EngineeringProduct ManagementMS OfficeCanvaGoogle DocsGoogle SheetsJavaScriptPythonC/C++SQLNode.js (Express.js, Hono.js)Next.jsDjangoFastAPIMonorepoTurborepoMicroserviceModularPostgreSQLSupabaseNeonMongoDBRedisDockerGitHub ActionsAWSVPSOpenTelemetryPrometheusGrafanaLokiRabbitMQBullMQHTMLCSSComponent LibraryNext.jsAxiosTanStackGitGitHubDockerTrelloNotionRenderClerkVercelLinuxPrompt EngineeringProduct ManagementMS OfficeCanvaGoogle DocsGoogle Sheets
[03]

Experience

  1. Jul 2026 — Present

    Software Engineer

    Cashless AI · Remote | London, England

    • Dec 2024 — Aug 2026

      Software Engineer

      Wa-Mac · USA (Remote)

      • Architected and deployed internal tools and infrastructure improvements, reducing workflow execution time by 40–50% and improving team productivity across all departments.
      • Built a Real Estate Tenant Management System with envelope encryption (KEK/DEK), idempotency mechanisms to eliminate duplicate payments, and fuzzy matching reducing duplicate file uploads by 70%; implemented support ticket system with Socket.IO + Redis Pub/Sub, video conferencing via LiveKit/WebRTC, and file storage via Google Drive OAuth and MinIO.
      • Developed Career Portal handling 1,200 applications in 3 days with 80% reduction in manual workflow; currently building a multi-tenant CRM platform using Turborepo.
      • Optimized caching layer with Redis and TanStack Query, improving website loading performance from 1.3s to 0.2–0.4s; containerized all services with Docker for consistent deployment.
      • Engineered custom storage server infrastructure reducing cloud storage costs by 76% and deployed VPN server for secure internal VPS/server access.
      • Led a team of 7 developers across multiple projects with focus on system design and technical architectural decisions.
    [04]

    Selected Work

    Multi-tenant SaaS Platform

    Turborepo + Bun monorepo orchestrating 6 applications and 7 services for multi-tenant ecommerce

    • Architected a Turborepo + Bun monorepo with 6 applications; designed a two-system platform separating SaaS Control Plane (tenant lifecycle, auth, billing) from Ecommerce Runtime (multi-tenant storefront).
    • Built automated store provisioning pipeline with env config generation, Caddy reverse-proxy management, SSL via ACME/Let's Encrypt, and health checks with real-time status tracking through deployment states.
    • Implemented a shared-container Next.js storefront serving all merchants via hostname-based tenant resolution with product catalog, checkout, customer auth, order tracking, and theme customization.
    • Integrated payment gateway (idempotent checkout), WhatsApp marketing (Baileys with per-store session isolation), and voice marketing (IVR).
    • Built modular REST API (Hono + Bun, DDD) with 35 feature modules; authored 3 production Dockerfiles and Docker Compose orchestrating 7 services with health checks and persistence.
    • Managed production deployment via PM2 and GitHub Actions CI/CD.
    • Turborepo
    • Bun
    • Next.js
    • Hono
    • Caddy
    • ACME
    • Baileys
    • PostgreSQL
    • Docker
    • PM2
    • GitHub Actions

    Offline-First Restaurant POS System

    Production-grade POS with zero data loss during network outages and exactly-once order sync

    • Architected and developed a production-grade offline-first Point-of-Sale application enabling uninterrupted cashier operations during network outages with zero data loss via IndexedDB local persistence.
    • Engineered a dual-database sync pipeline using Dexie.js (client-side write-ahead log) and PostgreSQL (canonical store), with BullMQ + Redis background worker ensuring exactly-once order processing via idempotency-key deduplication (24h TTL + DB constraints).
    • Integrated Web Bluetooth API for direct ESC/POS thermal receipt printer communication with automatic GATT discovery and Unicode-to-raster conversion using Canvas 2D API with Floyd-Steinberg dithering for non-Latin scripts (Bengali, Arabic, CJK).
    • Implemented PIN-based RBAC authentication (4 roles) with Redis-backed server sessions and 12-hour offline cache; designed a Zustand cart engine with per-line/order discounts, variants, modifiers, and category-level taxes.
    • Built admin dashboard with menu/staff CRUD, table management, analytics via Recharts, dynamic CSS theming, and keyboard-driven command palette; deployed via Docker Compose + PM2 with separate web/worker processes.
    • Next.js
    • Dexie.js
    • IndexedDB
    • PostgreSQL
    • BullMQ
    • Redis
    • Web Bluetooth
    • Canvas 2D
    • Zustand
    • Recharts
    • Docker
    • PM2
    [05]

    Recognition

    2026 / 3 EVENTS

    • 1st Runner Up

      CUET CSE FEST Micro-ops — National Hackathon

      Chittagong, BD

    • Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      Cumilla, BD

    • Prompt Engineering Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      Cumilla, BD

    2025 / 6 EVENTS

    • Champion

      UAP Innovatex 2025 — National Hackathon

      Dhaka, BD

    • Champion

      NSU Tech Fest 2025 — National Hackathon

      Dhaka, BD

    • 1st Runner Up

      MIST Inventious 4.1 — National Hackathon

      Dhaka, BD

    • 1st Runner Up

      Televerse 1.0 API Avengers — National Hackathon

      Chittagong, BD

    • Participant

      NASA Space Apps Challenge 2025

      Cumilla, BD

    • Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Fall Fest 2025

      Cumilla, BD

    2024 / 2 EVENTS

    • Top 10 Finalists

      OpenAPI National Hackathon — IUT Tech Fest

      Gazipur, BD

    • Top 9 Finalists

      SUST CSE Carnival 2024 — National Hackathon

      Sylhet, BD

    2023 / 1 EVENTS

    • Champion

      DevFest AI Hackathon by Google Developer Group

      Cumilla, BD

    [09]

    Testimonials

    Clips

    02

    Format

    Video

    Source

    Wa-Mac

    [ VIDEO / PROOF / 01 · 02 CLIPS ]REC · LIVE
    Loading player…

    Featured collaborator

    Md. Rahique Osman

    Product Designer

    Wa-Mac

    “Kawsar bridges product and engineering with rare clarity — he listens, ships on deadline, and stays composed when production pressure spikes.”
    [11]

    Incident Management

    I love incident response and working under pressure. When systems fail, I don't panic — I debug, communicate, and restore. Outages are uncomfortable; they're also where the best engineers show up.

    1. 2026

      P1 · LIVE EVENT

      Live Platform Crash — Prompt Engineering Contest

      BAIUST CSE Spring Fest 2026

      Mid-contest server crash · debugged, rate-limited, and restored the platform

      • During the Prompt Engineering contest, our server crashed under contest traffic — participants were mid-submission and the clock was running.
      • Led end-to-end debugging: traced load spikes, stabilized services, and added rate limits so the API could survive burst traffic without falling over again.
      • Spun up redundant hosting across the university server room and a Hostinger VPS, routed traffic, and brought the platform back online so the segment could finish.
      • Coordinated with faculty and volunteers on status updates so teams knew what was happening instead of guessing.

    2. 2024

      P1 · INTRUSION

      Compromised VPS — Unauthorized Crypto Mining

      Wa-Mac · Office Production

      Root compromise · mining malware removed · WireGuard VPN + SSH key access only

      • Our office VPS was hacked — an attacker had access and started crypto mining on production infrastructure.
      • Contained the breach: killed malicious processes, audited running services, rotated credentials, and verified no persistence mechanisms were left behind.
      • Disabled root SSH login, created a dedicated deploy user with least privilege, and locked down sudo to what operations actually need.
      • Stood up a WireGuard (wg) VPN server — team access to the VPS runs through a WireGuard tunnel only, with SSH public/private key auth and no password logins or wide-open port 22 on the public internet.

    3. 2025

      P1 · DATA EXPOSURE

      MongoDB Public Exposure — Misconfigured Port

      Wa-Mac · Production Database

      MongoDB port exposed to the internet · full data recovery

      • A junior developer accidentally left MongoDB publicly accessible — the database port was open to the world instead of bound to localhost or a private network.
      • Detected suspicious access patterns, locked down firewall rules immediately, and closed every path that shouldn't have been reachable from outside.
      • Recovered all data from backups and verified integrity before bringing services back — no silent corruption, no guessing about what was lost.
      • Documented the fix, added checklist gates for deploys, and walked the team through why exposed database ports are a production incident, not a small mistake.
    [07]

    Writing

    Latest from the blog

    All posts

    Posts coming soon

    Engineering notes and write-ups will land here first.

    Visit /blog
    [08]

    Speaking & Mentorship

    [ 01 ] Students coached

    102+

    [ 02 ] Modules shipped

    6

    [ 03 ] Weekly round-table

    40 avg

    [ 04 ] Hackathon teams

    51

    1. 2024 — Present

      Engineering Adda

      BAIUST Computer Club (BCC)

      Twice-weekly tech round-tables · 40 attendees on average

      • Host open engineering discussions on system design, shipping, and career growth for club members.
      • Built a consistent format: one topic, one demo, one debate — keeps sessions practical, not slide-heavy.

    2. 2024 — Present

      Software Intern Program

      BAIUST Computer Club (BCC)

      Coached 102 students to ship 6 campus modules

      • Designed the intern track: repo standards, PR reviews, and weekly ship checkpoints.
      • Mentored squads from idea → MVP → handoff to faculty/student users.

    3. 2025

      Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Fall Fest 2025

      Fall Fest hackathon track · Problem setter & on-floor mentor

      • Coordinated the 24-hour hackathon for Fall Fest — scheduling, judging, and participant support.
      • Authored challenges that reward real engineering — APIs, data modeling, and time-boxed trade-offs.
      • Mentored teams on architecture and scope so they could ship a working demo within the contest window.

    4. 2026

      Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      Spring Fest hackathon · Coordinator & mentor

      • Led hackathon coordination for Spring Fest alongside IUPC, typing contest, and ICT quiz programming.
      • Problem setter for the hackathon track; coached teams on scope and demo-ready deliverables.
      • Worked with faculty to plan and execute the segment for 600+ fest participants.

    5. 2026

      Prompt Engineering Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      Prompt Engineering segment · Coordinator & problem author

      • Designed and ran the Prompt Engineering track — briefs, rubric, and live mentoring during the contest.
      • Crafted problems that test practical LLM workflows — chaining, evaluation, and clear success criteria.
      • Mentored participants on prompt design and presenting working solutions within the time limit.
    [ PLAYLIST / YOUTUBE ]Open on YouTube

    YouTube Playlist

    Engineering talks, walkthroughs, and sessions — system design, shipping under pressure, and lessons from building in production.

    [10]

    Leadership

    1. 2024 — Present

      General Secretary (GS)

      BAIUST Computer Club (BCC)

      • Launched the Software Intern Program, coaching 102 students to ship 6 software modules for the campus.
      • Hosting twice-weekly "Engineering Adda" tech round-tables (avg 40 attendees), boosting club retention.
      • Organized a 24-hour hackathon for 51 teams (196 participants); managed logistics end-to-end, earning a 90% participant NPS.
      • Developed the Internal Management System and the mail server for the club.

    2. 2025

      Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Fall Fest 2025

      • Coordinated the 24-hour hackathon segment for Fall Fest — logistics, judging flow, and participant support.
      • Authored problem statements and mentored teams on architecture, scope, and shipping under time pressure.
      • Worked with faculty and club leads to execute the track end-to-end for 600+ fest participants.

    3. 2026

      Hackathon Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      • Led hackathon coordination for Spring Fest — registration, venue flow, and mentor rotations during the contest.
      • Problem setter for the hackathon track; coached teams on APIs, data modeling, and demo-ready scope.
      • Helped deliver IUPC, typing contest, and ICT quiz programming alongside the main hackathon segment.

    4. 2026

      Prompt Engineering Coordinator, Problem Setter & Mentor

      BAIUST CSE Spring Fest 2026

      • Designed and ran the Prompt Engineering segment — challenge briefs, rubric, and live mentoring.
      • Crafted problems that reward practical LLM use — chaining, evaluation, and time-boxed trade-offs.
      • Mentored participants on prompt design, tool choice, and presenting working solutions within the contest window.

    5. 2024

      Team Lead

      Stars Intern Program, BAIUST

      • Bus Tracker: real-time tracking for 12 buses with live map and ETA for students and admins.
      • Treasurer Branch Reconciliation: automated matching of bank statements and student payments with instant mismatch alerts and ready-to-sign reports.
      • Alumni Portal: a secure platform for graduate profiles, updates, and networking to enhance alumni engagement.
      • MCP Server: central info agent aggregating live academic, finance, and transport data for quicker decision-making.
    [12]

    Education

    1. 2022 — 2026

      Bangladesh Army International University of Science and Technology (BAIUST), Cumilla

      B.Sc in Computer Science and Engineering (Data Science Major)

      Result
      CGPA: 3.02
      Thesis
      “Voice-based Emotion Recognition”

      Honors

      • BAIUST National and International Distinguished Student Award (3×)

    2. 2021

      Cumilla Collectorate School and College, Cumilla

      Higher Secondary Certificate (HSC) · Science

      Result
      GPA: 5.00

    3. 2019

      Chauddagram HJ Model Pilot Govt High School, Cumilla

      Secondary School Certificate (SSC) · Science

      Result
      GPA: 4.50
    [13]

    References

    ~/kawsar/references.json2 contacts

    Golam Moktader Nayeem

    Dean (Acting), Faculty of ECE · Associate Professor, Dept. of CSE

    Bangladesh Army International University of Science & Technology (BAIUST) · Cumilla

    gmnayeem.cse@baiust.ac.bd

    Md. Khorshed Alam Molla

    Senior Manager & Head – ROC Cumilla · Asset and ROC Operations

    Brac Bank, ChawkBazar · Regional Operating Center, Cumilla

    mohammedkhorsedalam.molla@bracbank.com
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    [14]

    Contact

    Open to opportunities
    let’s build something durable.

    Hire MeView Resume
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