Sajjad Hossain

what my CTO says!

CTO, ELO

Chief Technology Officer · Embedded Logic Operations (ELO) ↗

“Sajjad isn't only strong at engineering, his extraordinary skill is documenting every piece of work properly, serving it cleanly to others, and ensuring the exact outcome. Once we discuss something once, I never have to explain him second time.”

I'm a full-stack product engineer based in Dhaka. Five years across AI audio tools, healthcare, pharmacy, and commerce, spent making that layer faster, safer, and ready for real users.

• ELO

  2024–Present

  Full Stack Engineer2024–Present
  AI · Desktop App · Healthcare · Supply Chain
• Sellbee

  2022–2024

  Full Stack Developer2022–2024
  Commerce · SaaS · Payments
• KHALID IT

  2021–2022

  Junior Web Developer2021–2022
  Web Apps · Data · Deployment

Live Systems

• 01Jamahook

  30K+ users ↗

  AI sound matching platform30K+ users ↗
  Connected native C++ sound processing to Node.js and moved CPU-heavy work into worker pools so search and desktop app workflows remained responsive during audio matching.Search · Desktop sync · Purchase flow · Heavy processing · 2K+ desktop users
• 02Pharmacon

  7K+ contracts ↗

  Pharmacy supply platform7K+ contracts ↗
  Rebuilt a 4-year-old pharmacy supply application by tracing its undocumented contract rules and preserving the business behavior already relied on, then separated the validation, service logic, and database operations, making the system 80% faster without breaking existing workflows.Contracts · Modules · Validation · Performance · 80% faster
• 03BMU Hospital

  14K+ patients ↗

  Healthcare management system14K+ patients ↗
  Designed a queue-backed file-processing workflow for BMU Hospital: doctors could preview uploaded reports immediately, while resource-intensive processing ran asynchronously with controlled concurrency to prevent server overload and crashes.Patients · Records · Reports · Access control · Cleaner records
• 04RealX

  3D preview ↗

  AR product experience3D preview ↗
  Uploads · Assets · 3D preview · Product flow
• 05BeeCommerce

  5K+ merchants ↗

  Merchant commerce system5K+ merchants ↗
  Products · Orders · Payments · Storefronts · Stripe · aamarPay

• Domain to dataMySQL · MongoDB · Validation · Reports

  Business workflows become entities, relations, validations, permissions, and reporting paths.

• AI-assisted executionClaude · Codex · Tests · Review

  AI speeds up code reading, scaffolding, test planning, migration checks, and documentation. Core logic stays human-reviewed.

• Release to scalePerformance · Deployment · Docs · Handoff

  After shipping, the system is profiled, cleaned, documented, and prepared for the next product cycle.

Contact

Tell me what you're building. Client projects and investor conversations land in the same inbox. Replies within 24 hours, Dhaka time.

• Emailhello@findsajjad.dev
• WhatsApp+8801650103297
• LinkedInlinkedin.com/in/sajjad-hossain-617151229
• GitHubgithub.com/sajjad960
• LocationDhaka, worldwide