KAMRUZZAMAN
Senior IT Infrastructure Engineer and Full-Stack Software Architect with over 12 years of hands-on experience designing, developing, and deploying enterprise-scale networks, mission-critical server infrastructure, and high-performance software systems. Proven track record of delivering 100% system uptime at the Prime Minister's Office (PMO) of Bangladesh (7 years) and managing live broadcasting NOC infrastructure. Expert in systems administration (Linux/Windows Server, Hyper-V, VMware, RAID, SAN Storage), network security, cloud automation (Oracle Cloud, Hostinger, aaPanel, CyberPanel), and full-stack software development (PHP 8+, Laravel, MySQL, Node.js, C# .NET 8, n8n, AI Agent workflows). Currently based in São Paulo, Brazil.
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Production Projects & Software Architecture
Explore 21 enterprise platforms, manufacturing ERPs, omni-channel POS systems, cybersecurity vaults, and AI automations architected and deployed by Kamruzzaman.
Shongroho & ShongrohoPOS Retail Ecosystem
Omni-channel retail platform powering public e-commerce, web POS cashier terminals, and native desktop Windows POS apps with hardware printing integration.
- › Architected Laravel-based backend engine powering both the public storefront and in-store cashier portal (posapp/).
- › Engineered ESC/POS hardware thermal printing integration (58mm and 80mm roll receipts) and instant barcode scanner input.
- › Packaged native desktop Windows application via C# .NET 8 WebView2 for offline-resilient cashier terminals.
- › Built Android Admin & Customer companion APKs for store managers to track live sales and inventory on mobile.
Safwan Foils Industrial Manufacturing & Tax ERP
Complete enterprise resource planning (ERP) system for foil manufacturing with double-entry accounting, stock tracking, and NBR tax reporting.
- › Designed full General Ledger, Chart of Accounts, and automated Cash/Bank statement reconciliation.
- › Engineered raw material procurement, store item categorizations, stock conversion batching, and wastage tracking.
- › Built government NBR (National Board of Revenue) compliant production and sales reporting modules.
- › Implemented granular role-based permissions, quotation generators, and multi-warehouse ledger tracking.
Kidkuttus — Modern Kids Apparel Storefront
High-volume children’s fashion e-commerce storefront optimized for sub-1.5 second loading and high-conversion mobile checkout.
- › Created mobile-first UI with instant AJAX slide-over cart drawer, dynamic size/color matrix, and single-step checkout.
- › Developed automated SMS & email order notifications triggered on order placement and courier dispatch.
- › Configured Cloudflare Page Rules, caching policies, and image optimization for high mobile shopper traffic.
- › Seamlessly integrated automated backup routines and database indexing for high concurrency.
Carrybee & BotBahini Multi-Model AI Agent System
Autonomous AI customer service agent with intelligent multi-model LLM failover, parcel tracking, and VPS intrusion monitoring.
- › Architected dual-LLM routing with automatic fallback ensuring 100% bot availability during high traffic or API rate limits.
- › Created automated Meta Graph API webhooks for instant Facebook Messenger comment and message replies.
- › Built real-time parcel delivery status queries directly against logistics databases and customer records.
- › Engineered a security monitoring workflow that parses server access logs, detects intrusion attempts, and triggers instant alerts.
NexaHive AI — Middle East Sovereign AI Cloud & DC Platform
Distributed AI computing network connecting GPU infrastructure with enterprises, featuring automated server provisioning and telemetry.
- › Built GPU server rental marketplace with automated SSH health verification and live status checks.
- › Designed cron-based automated billing engine calculating exact usage and rental telemetry.
- › Integrated Resend API for transactional email receipts, password resets, and admin telemetry notifications.
- › Protected endpoints against bot attacks with Cloudflare Turnstile cryptographic verification and rate limiting.
Biometric Neural Face Recognition Auth Portal
Client-side neural network face detection and embedding system enabling passwordless biometric authentication and verification.
- › Engineered real-time webcam facial capture extracting 68 facial landmarks and 128-d floating point descriptors.
- › Implemented server-side Euclidean distance matching algorithm with configurable strict/relaxed threshold verification.
- › Built anti-spoofing checks, live capture prompts, and fallback one-time password (OTP) verification routines.
- › Crafted a high-tech dark glassmorphism dashboard showing real-time match confidence percentages.
SafiHalal — Shariah Compliant Halal Investment Hub
Modern financial platform aggregating vetted Shariah-conscious investment opportunities across real-world assets, tech, and commodities.
- › Built bilingual (Arabic/English) financial portal showcasing asset-backed equity and real estate syndication deals.
- › Implemented investor lead acquisition engine with automated inquiry dispatch and CRM synchronization.
- › Configured hardened aaPanel security profiles with automated SSL/TLS lifecycle and DNS edge caching.
- › Engineered modern typography, micro-interactions, and financial disclosures UI.
Amar Operation — Multi-Tenant Business ERP Portal
Centralized enterprise operational platform streamlining multi-role administrative workflows, sales analytics, and internal audits.
- › Developed modular business operations dashboard tracking daily revenue, employee activity logs, and expense registers.
- › Engineered relational database models with ACID compliance for inventory and transaction reconciliation.
- › Constructed secure session management and multi-level permissions protecting confidential business intelligence.
- › Implemented exportable PDF/Excel reporting modules for operational review meetings.
2BD Secure Vault — Zero-Knowledge Password Manager
Cloud-based encrypted password and secrets manager designed for secure credential storage and team sharing.
- › Architected secure credential vault with custom category tags, password health analyzer, and auto-generator.
- › Engineered session timeout safeguards, clipboard clearing handlers, and brute-force lockouts.
- › Built responsive web client optimized for quick mobile retrieval and one-click copy functionality.
- › Integrated encrypted backup export routines for offline disaster recovery.
Zaman Heritage — Interactive Lineage & Genealogy Tree
Interactive multi-generational family tree and biographical digital archive documenting heritage and relationships.
- › Designed relational database schema mapping multi-generational parent-child and spousal relationships.
- › Engineered visual SVG lineage tree allowing zoom, pan, and branch exploration across generations.
- › Built administrative media management module for biographical portraits, dates of birth, and historic notes.
- › Configured automated database backups on MySQL 8 with full character set utf8mb4 encoding.
Blom Hotel Operations & Reservation System
Comprehensive hospitality management system streamlining room matrix allocation, guest check-in/out, and financial billing.
- › Developed real-time visual room allocation board with instant status updates (Clean, Occupied, Reserved, Maintenance).
- › Engineered automated guest billing, advance deposit tracking, and professional PDF invoice generation.
- › Created database scripts for ghost-room reconciliation and multi-tier room category pricing configurations.
- › Implemented multi-user role management separating front-desk cashiers, housekeepers, and general management.
Kamruzzaman Private Enterprise Cloud & Storage Node
Dedicated private enterprise cloud storage cluster providing file synchronization, shared drives, and automated node backups.
- › Deployed private cloud storage infrastructure on Oracle Cloud ARM Ubuntu 22.04 LTS.
- › Engineered automated daily backup routines with off-site sync and encrypted snapshot retention.
- › Configured Apache VirtualHosts with HTTP/2 and Let’s Encrypt wildcard certificates.
- › Enforced kernel-level firewall rules and fail2ban protection against unauthorized probing.
Artist Kamrun Nahar — Creative Portfolio & CMS
International fine arts exhibition portfolio with bespoke lightweight content management system and high-res media CDN.
- › Engineered dynamic artwork gallery with categorized masonry grids and lightbox zoom previews.
- › Developed intuitive administrative panel allowing artwork uploads, exhibition dates management, and testimonials seeding.
- › Optimized image delivery pipeline ensuring retina-quality artwork rendering with minimal bandwidth footprint.
- › Configured automated Apache virtual host rules, HTTPS redirection, and SEO structured data.
Health & Fly International Medical Tourism Portal
Cross-border healthcare facilitation and patient inquiry portal connecting Bangladeshi patients with accredited Indian hospitals.
- › Built comprehensive medical specialty directories categorized by hospital, procedure, and specialist surgeons.
- › Designed multi-step encrypted patient inquiry forms with secure medical report attachments.
- › Integrated medical visa assistance workflows, travel coordination advice, and localized Bengali/English content.
- › Deployed on hardened aaPanel Apache server with SSL certificates and strict access controls.
ASCOA Africa Marine & Environmental Modernization
Technical roadmap, enterprise Cloudflare DNS orchestration, and resilient web infrastructure for ASCOA (UNV partner).
- › Authored complete technical modernization proposal, meeting guides, and cloud roadmaps for ASCOA leadership.
- › Architected Cloudflare DNS zone imports and CDN caching rules for africa marine conference domains.
- › Engineered bash deployment scripts for automated search engine indexing and SSL certificate verification.
- › Designed donor inquiry funnel and multi-lingual content delivery infrastructure.
Headless WhatsApp OTP & Transactional Gateway
Automated WhatsApp session management and instant OTP verification gateway for e-commerce and login authentication.
- › Constructed Express microservice handling dynamic 6-digit OTP code generation and WhatsApp message dispatch.
- › Engineered persistent session recovery preventing disconnection during network interruptions.
- › Exposed secure RESTful endpoints with HMAC token authentication for external web app consumption.
- › Developed web-based scanner dashboard for scanning session QR codes and inspecting delivery telemetry.
Zaman.com.bd Unified Portal & Encrypted Vault
Centralized single-sign-on administrative portal with AES-256-GCM encrypted credential vault and certificate verification.
- › Built digital certificate verification system (`/certificate/`) with QR code scanning and cryptographic tamper checks.
- › Developed encrypted secrets vault utilizing AES-256-GCM authenticated cipher with HMAC integrity seals.
- › Integrated single-sign-on (SSO) session manager linking sub-applications across the domain.
- › Built live server telemetry widgets monitoring CPU, memory, uptime, and database connection pools.
Ollo Cafe Restaurant & Multi-Location Franchise Portal
Artisan cafe dining hub featuring interactive visual menus, reservation intake, and prospective franchise partner onboarding.
- › Designed interactive digital dining menu organized by categories, dietary tags, and pricing.
- › Constructed franchise partnership portal collecting multi-step investor applications.
- › Integrated Google Maps geolocation pins and customer feedback telemetry.
- › Optimized mobile responsiveness for frictionless ordering and browsing.
Ollo Cafe Enterprise Helpdesk & Franchise Ticketing
SLA-backed enterprise ticketing and customer support suite managing franchise service tickets and store maintenance.
- › Engineered ticket assignment workflow routing issues to kitchen, maintenance, or executive managers.
- › Integrated email notification webhooks alerting franchise owners on status updates.
- › Designed priority-based sorting (Low, Normal, Urgent, Critical) and response SLA tracking.
- › Secured customer issue attachments and internal manager-only discussion notes.
Ropon Foundation — Tree Planting & Green Agro Portal
Environmental tree plantation non-profit platform facilitating tree sponsorship, plantation tracking, and volunteer engagement.
- › Designed interactive campaign presentation showing trees planted, carbon offset estimates, and impact areas.
- › Constructed volunteer registration and donation sponsorship inquiry flows.
- › Configured lightweight asset loading ensuring sub-second rendering across mobile networks.
- › Provisioned SSL certificates and hardened security headers on aaPanel.
Perceptual Image Difference Hashing (dHash) Engine
High-throughput visual fingerprinting system that detects duplicate or modified images using 64-bit Hamming distance.
- › Engineered algorithm resizing images to 9x8, computing row gradient comparisons, and outputting 64-bit integer hashes.
- › Formulated BIT_COUNT bitwise XOR database queries finding near-identical images in milliseconds.
- › Designed automatic duplicate rejection pipeline for e-commerce catalogs and identity document uploads.
- › Implemented benchmark dashboard comparing visual similarity thresholds under heavy compression.
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Core Technical Competencies
Enterprise systems administration, virtualization clusters, cloud orchestration, network defense, and high-performance full-stack software engineering. Click any skill tag to filter matching projects.
Systems & Infrastructure
Cloud & Web Hosting Panels
Full-Stack Software Design
Databases & Performance
AI, Automation & Messaging
Network Security & Protocols
Professional Experience
Over a decade of leadership in mission-critical government infrastructure, national live broadcast NOCs, and enterprise systems consulting.
IT Procurement & Systems Support Consultant
Star Tech & Engineering Ltd. • Dhaka, Bangladesh (Remote/Hybrid)
- ▪ Managed the full lifecycle of government IT procurement activities, coordinating technical requirements, bid preparations, and hardware compliance.
- ▪ Aligned procurement strategies with enterprise IT infrastructure capabilities to ensure seamless technical integration.
- ▪ Acted as senior technical coordinator bridging the gap between IT engineering support teams, cloud providers, and external enterprise vendors.
Maintenance Engineer (IT Infrastructure & Systems)
Office of the Prime Minister, Government of Bangladesh • Dhaka, Bangladesh
- ▪ Led and mentored a cross-functional IT engineering team managing highly sensitive, mission-critical national infrastructure at the Prime Minister’s Office.
- ▪ Designed, deployed, and administered enterprise-level LAN/WAN networks, fiber backbones, and state-grade cybersecurity firewalls.
- ▪ Configured and maintained high-availability virtualization clusters utilizing Microsoft Hyper-V and VMware ESXi.
- ▪ Managed multi-terabyte SAN storage arrays, automated RAID arrays, off-site disaster recovery protocols, and LTO magnetic tape archives.
- ▪ Administered government servers including Active Directory Domains, SSH bastions, FTP repositories, Linux File Sharing clusters, and Zimbra Mail servers.
Assistant Maintenance Engineer (Broadcast NOC & Systems)
Ekattor Media Limited • Dhaka, Bangladesh
- ▪ Managed 24/7 IT broadcasting infrastructure, ensuring seamless live television transmission, satellite uplinks, and digital video feeds.
- ▪ Architected and monitored corporate network routing, Cisco/MikroTik routers, Wi-Fi backbones, and TCP/IP broadcast streaming protocols.
- ▪ Established emergency field communication links and live video transmission support for remote news broadcasting nationwide.
- ▪ Administered Linux VPS hosting nodes, cPanel Mail servers, and supervised Raritan online remote KVM enterprise management systems.
Higher Education
Certifications & Languages
- CompTIA A+ (Valid till Dec 2027)
- Microsoft Certified: Azure Administrator Associate
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Available for senior IT infrastructure, systems engineering, cloud architecture, and full-stack software development engagements in São Paulo, Brazil and globally.