Imranul RahmanSenior Full-Stack · SEO Architect
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Available for Senior Full-Stack & Technical SEO Engagements

Engineering Scalable Web Platforms, Cloudflare Serverless & Search Dominance.

Senior full-stack web developer and technical SEO architect from Bangladesh, building since 2011. I take ambitious digital products from conceptual architecture to high-throughput production — high-speed web apps, browser utilities, PostgreSQL databases, and Android systems, delivered by one accountable pair of hands.

Explore Production Work Discuss a Project Live Network: lenbd.org ↗
15+ Years Active (Since 2011)
10+ Production Platforms
470+ Tools & Calculators
100/100 Core Web Vitals Standard

01 // PHILOSOPHY & BACKGROUND

Senior engineering discipline without agency overhead.

I have spent 15 years in production web software — conceiving, designing, architecting, and deploying systems that scale quietly, index effortlessly, and convert visitors into clients.

Most web projects suffer not from a lack of ideas, but from coordination bloat: account managers passing simplified briefs to junior contractors who stitch together heavy libraries. The result is sluggish page loads, broken SEO, fragile dependencies, and unpredictable maintenance bills.

My model is completely opposite: one accountable senior architect who writes clean, resilient code from database schema to responsive CSS, deploying on modern serverless edge infrastructure (Cloudflare Workers, Supabase PostgreSQL) that handles traffic spikes with near-zero compute costs.

I created and operate the entire LenBD production ecosystem — 10+ live platforms spanning stock marketplaces, trilingual reward engines, 470+ online calculators, and Android media applications — proving architectural viability under real-world traffic every single day.

PILLAR 01

Direct Collaboration

Work directly with the engineer writing queries and designing interfaces. Zero lost context, zero agency overhead.

PILLAR 02

Speed as a Moat

Every product is engineered to achieve 100/100 Core Web Vitals. Sub-second loads increase search ranking and retention.

PILLAR 03

Architectural Longevity

PostgreSQL schemas with Row Level Security, Cloudflare Workers caching, and zero framework churn that runs reliably for years.

PILLAR 04

Technical SEO by Design

Semantic HTML5, automated Schema.org entity graphs, and programmatic link architectures built directly into the foundation.

02 // PORTFOLIO & ECOSYSTEM

Production platforms, tools & live systems.

Every system below was designed, coded, and deployed end-to-end. Click live links to test real-world speed and responsiveness.

Screenshot of Lenbd.org stock photo and vector library homepage
Production · Flagship lenbd.org

Lenbd.org — Royalty-Free Stock Photos & Vectors

A high-volume digital asset marketplace with searchable catalogs, curated collections, multi-resolution asset delivery, user accounts, and tiered subscription monetization. Built with Cloudflare edge caching for instant worldwide media discovery.

Cloudflare Workers Supabase PostgreSQL Cloudflare R2 Programmatic SEO Vanilla JS
Launch Live Platform ↗
Architectural Case Study
ProblemTraditional media CMS platforms require expensive server clusters and crash under image crawl traffic.
SolutionOffloaded raw assets to Cloudflare R2, cached public catalogs at edge PoPs, and utilized Supabase with Row Level Security for transactions.
Outcome99.98% uptime, sub-50ms TTFB worldwide, zero bandwidth egress bills, and 100/100 Core Web Vitals score.
Screenshot of Cash Point trilingual rewards platform homepage
Production · High Concurrency cash.lenbd.org

Cash Point — Trilingual PTC & Reward Platform

Engineered for high concurrent user sessions across South Asia. Trilingual interface supporting English, Bengali, and Hindi with sub-25ms transaction verification, automated anti-cheat ledger balancing, and low-bandwidth mobile optimization.

PostgreSQL Ledger i18n (EN/BN/HI) Anti-Fraud Validation Low-Latency Workers
Launch Live Platform ↗
Architectural Case Study
ProblemHigh concurrent click volume, reward fraud attempts, and slow 3G/4G network speeds across regional markets.
SolutionAtomic PostgreSQL ledger transactions with strict foreign keys, device fingerprinting, and an ultra-lean CSS/JS footprint under 45KB.
OutcomeZero race conditions across 100k+ balance adjustments and flawless performance on low-end Android browsers.
Screenshot of JalBD.com Bengali homemade pickle shop homepage
Production · E-Commerce jalbd.com

JalBD.com — Bengali-First Artisanal Food Shop

A specialized direct-to-consumer e-commerce shop engineered with a Bengali-first customer journey, mobile-first one-tap checkout, rich LocalBusiness and Product Schema.org structured data, and sub-second page delivery across Bangladesh cellular networks.

Bengali Typography Mobile Checkout Product Schema Edge Micro-Caching
Launch Live Platform ↗
Architectural Case Study
ProblemBulky WooCommerce/Shopify stores loaded in 7+ seconds on local mobile connections, losing checkout conversion.
SolutionCustom high-speed e-commerce architecture, subsetted Bengali Google Web Fonts, streamlined 2-step checkout, and zero render-blocking scripts.
OutcomePage loads in under 0.9s on 4G networks, 40%+ increase in checkout completions, and top Google rankings for local food keywords.
Screenshot of SEO Tols metadata and image automation tool
Developer Tool seotols.lenbd.org

SEO Tols

Automated meta tag generator, Open Graph validator, and schema markup tester built for web developers and technical marketers.

Core Web Vitals Ready
Screenshot of WebTest website speed and SEO analyzer
Speed Analyzer webtest.lenbd.org

WebTest

Real-time website performance benchmark tool analyzing TTFB, FCP, LCP, image compression efficiency, and technical SEO hygiene.

Simulated Lighthouse
Screenshot of MultiTools developer utilities collection
Utility Suite multitools.lenbd.org

MultiTools

Collection of 40+ high-throughput utilities: JSON prettifier, Base64 converter, regex tester, UUID generator, and CSS minifier.

Client-Side Zero-Latency
Screenshot of Bookmark personal web launchpad dashboard
Productivity bookmark.lenbd.org

Bookmark

Minimalist personal web dashboard and visual launchpad with offline local caching, keyboard shortcuts, and tag categorization.

Offline Caching
Screenshot of LenCulator online calculators library
Calculators (470+) calculator.lenbd.org

LenCulator

Comprehensive library of 470+ interactive calculators covering financial planning, scientific formulas, health, and engineering math.

Programmatic Schema
Screenshot of Lenbd TV live television streaming player
Streaming Media tv.lenbd.org

Lenbd TV

Zero-buffer live television streaming web application featuring custom HLS player integration, auto-failover, and adaptive bitrate switching.

HLS Adaptive Video
Screenshot of M.Lenbd Android entertainment app landing page
Android Hub m.lenbd.org

M.Lenbd

Dedicated Android entertainment and APK landing portal with direct CDN distribution, offline caching, and instant launch capability.

Native APK Delivery

Arcade Prototypes & Android Experiments

Lightweight experimental builds developed for offline Android gaming and HTML5 canvas engines

Neon DashOffline-first endless-runner arcade concept with 60fps canvas loop.Experiment
Offline LudoLocal, zero-network multiplayer board game built with pure vanilla JS.Experiment
Bubble ShooterLightweight canvas-based casual puzzle build optimized for touch devices.Experiment

03 // ARCHITECTURAL COMPETENCIES

Deep architectural mastery across the full stack.

A modern web product succeeds when its architecture, database, edge routing, and technical SEO form one cohesive, disciplined pipeline.

Full-Stack & Modern UI Architecture

Engineering zero-bloat web interfaces with semantic HTML5, modern CSS custom properties, vanilla ES6+, and responsive layouts. Clean DOM hierarchies that render instantly without heavy JavaScript frameworks when not strictly necessary.

HTML5 Semantic CSS3 Modern Vanilla ES6+ ARIA 1.2 Design Tokens

Cloudflare Workers & Edge Computing

Deploying serverless logic directly onto 300+ edge locations worldwide. Sub-second cold starts, edge authentication, geolocation routing, KV store caching, and custom reverse-proxy security rules.

Cloudflare Workers Pages Workers KV Edge Caching Sub-50ms TTFB

Supabase, PostgreSQL & Data Integrity

Designing robust relational schemas with strict foreign key constraints, Row Level Security (RLS) policies for multi-tenant isolation, automated database triggers, materialized views, and sub-10ms query execution.

PostgreSQL 15+ Supabase Row Level Security ACID Transactions B-Tree Indexing

Technical SEO & Search Dominance

Architecting interconnected Schema.org JSON-LD graphs, automated canonical management, international hreflang tags, XML sitemaps, and programmatic internal linking strategies that drive top search visibility.

Schema.org JSON-LD Hreflang Tags Crawl Efficiency Rich Snippets Internal PageRank

Application Security & Hardening

Implementing strict Content Security Policies (CSP), anti-bot rate limiting, CORS configuration, CSRF tokens, SQL injection immunity, input sanitation, and defense-in-depth security architectures.

Strict CSP OWASP Top 10 Rate Limiting Zero-Trust Auth Sanitization

Performance Engineering & Core Web Vitals

Obsessive reduction of Time to First Byte (TTFB), Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS). Target: 100/100 Google PageSpeed across mobile and desktop.

Core Web Vitals Zero CLS Resource Hints Asset Optimization 100/100 PageSpeed

AI Pipelines & Automation Workflows

Integrating LLM embeddings, automated metadata generation, programmatic catalog indexing, and batch worker routines that autonomously curate and categorize thousands of digital assets.

LLM Integrations Vector Search Automated Metadata Batch Workers Data Ingestion

Android & Media Streaming

Building lightweight native Android applications, offline SQLite/Room data caches, HLS adaptive bitrate streaming players, and low-latency video distribution architectures that excel in low-bandwidth environments.

Android SDK HLS Streaming Offline SQLite Low Bandwidth Adaptive Video

Verified Performance & Technical SEO Benchmark

Interactive audit metrics engineered into the LenBD platform infrastructure. Click any gauge for technical audit details.

100/100 Google Lighthouse Standard
Performance
Accessibility
Best Practices
SEO
Production Telemetry · Cloudflare 300+ PoPs · Zero Cold Starts · Chrome 124
LCP 0.8s PASS · 100
Largest Contentful Paint
LCP · Fastest 1%
Industry Avg: 3.8s · 4.8x Faster
INP 42ms PASS · 100
Interaction to Next Paint
INP · Zero UI Lag
Industry Avg: 280ms · 6.6x Faster
CLS 0.00 PASS · 100
Cumulative Layout Shift
CLS · Zero Shift
Industry Avg: 0.18 · 100% Stable
FCP 0.6s PASS · 100
First Contentful Paint
FCP · Edge Instant
Industry Avg: 2.4s · 4.0x Faster
Largest Contentful Paint (LCP) · 0.8s: Achieved via Cloudflare tier-1 edge caching, modern web formats, inline critical CSS, and preloading key hero assets. Outperforms 99% of agency WordPress setups.
Google PageSpeed: 100/100

Production Architecture Blueprint — The LenBD Serverless Network

How 10+ subdomains, thousands of digital assets, and high-concurrency tasks operate with sub-second latency and minimal server costs. Click any stage to inspect live configuration:

STAGE 01

Edge DNS & TLS 1.3

Global Anycast DNS via Cloudflare, terminating TLS 1.3 at 300+ PoPs with 0-RTT.
STAGE 02

Workers Serverless Router

Edge workers intercept requests, handle auth tokens, and route subdomains with zero cold starts.
STAGE 03

Stale-While-Revalidate Cache

Tier-1 edge cache serves static assets & cached API responses in <50ms worldwide.
STAGE 04

Supabase PostgreSQL & R2

Row Level Security (RLS) protects data; Cloudflare R2 serves media with zero egress fees.
STAGE 01 · Global Anycast Edge Routing Global Latency: <12ms · DDoS Protected 
// Cloudflare Edge Configuration
const config = {
  dns: "Cloudflare Anycast Global Routing",
  tls: "TLS 1.3 with 0-RTT Session Resumption",
  security: "WAF + Enterprise DDoS Mitigation",
  hsts: "max-age=31536000; includeSubDomains; preload"
};

04 // DEVELOPMENT METHODOLOGY

The 8-stage lifecycle of every production build.

Every platform is constructed through a repeatable, disciplined engineering process that prioritizes performance, security, and search discoverability.

STAGE 01

Understand & Specify

Deconstruct client business goals, target user personas, traffic projections, and competitive search landscape before writing a single line of code.

STAGE 02

Architect & Model

Design normalized PostgreSQL schemas with strict foreign keys, plan serverless edge routes, and map the Schema.org JSON-LD entity graph.

STAGE 03

Build with Real Data

Develop the frontend with production content and authentic typography rather than placeholder text, ensuring real-world visual hierarchy.

STAGE 04

Integrate & Validate

Implement RESTful endpoints and Supabase Row Level Security policies, testing every CRUD action against malicious injection attempts.

STAGE 05

Core Web Vitals Tuning

Eliminate layout shifts (CLS=0), inline critical rendering CSS, optimize font loading, and ensure sub-1s Largest Contentful Paint (LCP).

STAGE 06

Harden & Secure

Configure strict Content Security Policy (CSP), anti-bot rate limits, CORS rules, and verify OWASP security hygiene across all inputs.

STAGE 07

Real-Device Testing

Audit across low-end Android mobile devices, iPhones, slow 3G/4G network throttles, and desktop viewports to ensure universal usability.

STAGE 08

Ship & Maintain

Deploy to Cloudflare edge network, submit XML sitemaps to Google Search Console, and provide ongoing architectural stability and monitoring.

05 // ENGAGEMENT MODELS

How we can collaborate on your next system.

Direct, transparent engineering partnerships without sales intermediaries. Choose the model that fits your product scope:

OFFERING 01

End-to-End Product Engineering

Taking ambitious digital products from conceptual architecture to global production deployment. Complete frontend design, database schema, serverless API, and technical SEO.

  • Turnkey web applications & SaaS platforms
  • Cloudflare Workers + Supabase PostgreSQL stack
  • 100/100 Core Web Vitals guarantee on launch
  • Fixed-milestone transparent pricing
Inquire for Product Build →
OFFERING 02

Technical SEO & Core Web Vitals Audits

A deep-dive technical audit of your existing website to identify crawl bottlenecks, schema markup errors, bloated assets, and slow Core Web Vitals metrics that hurt Google rankings.

  • Comprehensive Schema.org entity graph modeling
  • LCP, INP & CLS remediation code patches
  • Googlebot crawl budget & sitemap optimization
  • Delivered as actionable, implementable code
Request SEO / Vitals Audit →
OFFERING 03

Cloudflare Serverless & Database Architecture

Modernizing backend infrastructure by moving expensive, slow server clusters to Cloudflare Workers edge compute and Supabase PostgreSQL with automated RLS policies.

  • Sub-50ms global TTFB via edge caching
  • Cloudflare R2 zero-egress media storage pipeline
  • PostgreSQL indexing & transaction optimization
  • Drastic reduction in monthly cloud hosting bills
Modernize Infrastructure →
OFFERING 04

Codebase Rescue & Performance Modernization

Refactoring slow, vulnerable, or abandoned web platforms into clean, resilient modern stacks. Fixing security vulnerabilities, eliminating technical debt, and restoring uptime.

  • Zero-downtime database migration
  • Elimination of fragile, bloated dependencies
  • Automated backup & disaster recovery plans
  • Ongoing architectural retainer support
Rescue Existing Codebase →

06 // CAREER MILESTONES

Fifteen years across five distinct eras.

Independent engineering discipline developed through continuous hands-on production builds from 2011 to 2026.

Foundations of the Craft & Semantic Web

2011 – 2014

Began independent web programming. Mastered hand-coded semantic HTML, CSS2/3, vanilla JavaScript, PHP, and relational MySQL. Built initial commercial portals and studied early search indexing algorithms.

HTML5 CSS3 PHP MySQL Early SEO

CMS Architecture, E-Commerce & High-Volume SEO

2014 – 2018

Architected custom CMS solutions, high-converting WooCommerce storefronts, and programmatic internal linking structures. Scaled organic search traffic for clients across competitive international keywords.

Custom CMS E-Commerce Microdata PageRank Optimization

Full-Stack Scalability & Web Performance Obsession

2018 – 2021

Shifted focus toward performance engineering, RESTful APIs, zero render-blocking architecture, and early Core Web Vitals optimization. Built custom browser-based tools and high-throughput utility sites.

REST APIs Core Web Vitals Asset Pipelines Modern JS

From Websites to Scaled Product Ecosystems

2021 – 2024

Founded the LenBD production network. Engineered over 470 online calculators, launched native Android entertainment apps, deployed low-latency HLS streaming players, and scaled multi-tenant reward platforms.

LenBD Network 470+ Calculators Android SDK HLS Streaming

Serverless Edge, PostgreSQL & AI Automation

2024 – 2026+

Pioneering edge-native architectures combining Cloudflare Workers, Supabase PostgreSQL with strict Row Level Security, Cloudflare R2 media storage, AI metadata pipelines, and automated Schema.org entity graphs.

Cloudflare Workers Supabase RLS Cloudflare R2 Schema Graphs AI Pipelines

07 // CLARITY & ANSWERS

Everything you need to know.

Direct answers about engagement, technical capabilities, communication, and project delivery:

What services do you provide?
I provide end-to-end digital product engineering: full-stack web application development, Cloudflare serverless edge architecture (Workers, Pages, R2), database engineering (Supabase & PostgreSQL with Row Level Security), technical SEO audits, Core Web Vitals performance optimization, and native Android application development.
What is your background and experience?
I have been building web platforms independently since 2011 (over 15 years of hands-on production experience). I am the creator and solo architect of the LenBD network, which encompasses 10+ live platforms including stock marketplaces, trilingual reward engines, artisanal e-commerce shops, and over 470 online calculators.
Why is Technical SEO and Core Web Vitals crucial for a modern web product?
Technical SEO ensures search engines can effortlessly crawl, understand, and index your application's entities through structured data (JSON-LD), clean URL architecture, and semantic HTML. Core Web Vitals (LCP, INP, CLS) are direct Google ranking factors and dictate whether mobile visitors stay or bounce. I engineer performance into the architecture from day one rather than treating it as an afterthought.
How does your single-operator model benefit clients?
In traditional agencies, requirements are passed down through sales reps and account managers to junior contractors, leading to lost context and bloat. Working with me means direct one-on-one collaboration with the senior engineer who personally designs the interface, writes the queries, optimizes edge caches, and maintains the application post-launch.
What technology stack do you specialize in?
My primary production stack focuses on Cloudflare Pages, Cloudflare Workers (serverless edge compute), Cloudflare R2 object storage, Supabase (PostgreSQL with Row Level Security), modern vanilla JavaScript, semantic HTML5/CSS3, PHP/MySQL, RESTful APIs, and the native Android SDK.
How can I contact you for a project or consultation?
You can reach me directly through the dedicated contact options below via protected WhatsApp or direct email. All inquiries receive direct, personal responses without automated bots or intermediaries.

08 // GET IN TOUCH

Let's build something fast, scalable & enduring.

Select an inquiry topic below to automatically configure your message. All inquiries go straight to my direct phone and email with guaranteed personal response:

Direct WhatsApp Chat Open Email Client
Direct Email Address
••••••••754@hotmail.com [Click to Reveal]
Hotmail · Personal Inbox
Direct Phone & WhatsApp
+880 1615-•••••• [Click to Reveal]
Call Directly Bangladesh (GMT+6)