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Khalid Hassan S.
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Khalid Hassan S.

Full-Stack PHP (Laravel/CI) Developer | Secure & ERD-Based Systems

I help universities, financial institutions, and organizations build secure, scalable and maintainable PHP systems using clean architecture, ERD-driven database design and modern frameworks like Laravel and CodeIgniter Over the past 9+ years, I’ve delivered robust web applications that simplified operations, improved uptime and ensured compliance for clients in education and banking sectors. 🌟 Selected Results 🌟 🏦 Built a Central Bank collateral management system: delivered in 7 weeks with 0 post-deployment issues. 🎓 Developed University web portal achieving 99.9% uptime and integrated online payment workflows. 🧩 Designed modular ERP features with ERD-based architecture for easy scalability and auditing. 🧠 Converted complex SQL scripts into ERD diagrams, helping a client make immediate architecture decisions and speed up development planning. 💻 Core Expertise 🔥 PHP, Laravel, CodeIgniter, MySQL, MariaDB, PostgreSQL, MongoDB 🔥 REST API Design & Integration 🔥 ERD Diagram & System Architecture Modeling 🔥 Frontend: JavaScript, jQuery, Bootstrap, HTML5, CSS3 🔥 Secure Authentication (2FA, OAuth, Magic Link) 🔥 UML & ERD Database Diagrams 🚀 My Approach 🚀 1. Understand your workflow and map it in ERD/UML 2. Build scalable backend modules with clear logic 3. Deliver with documentation, testing and post-launch support 💬 Let’s discuss your system challenges. I’ll help you design a secure, maintainable solution that works long-term. ⏱️ Availability: Less than 30 hrs/week 🌍 Timezone: GMT+6 (Flexible communication hours) 💼 Projects from: $150+

🇧🇩Dhaka, Bangladesh$15/hr100% JSS5.00 (6)Since Jul 2023

Earnings and projects

MRR
$68

Last 6 months ÷ 6

World#144,335 / 412k
🇧🇩Country#4,997 / 15.0k
Revenue, last 30 days
$0

Last 6 months: $406

Total earnings
$1.5k

Billed in all: $1.5k

World#361,589 / 412k
🇧🇩Country#12,890 / 15.0k
Per project
$146

$203 in the last 6 months

World#285,254 / 412k
🇧🇩Country#10,173 / 15.0k
Projects, last 6 months
2
100% fixed0% hourly
World#88,918 / 412k
🇧🇩Country#4,445 / 15.0k
Projects in all
10

Across 11 contracts

100% fixed0% hourly
World#201,797 / 412k
🇧🇩Country#11,225 / 15.0k

Earnings, last 30 days

$1.5kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$1,460$1,480$1,500$1,520Oct 8Oct 23Nov 7

Skill rankings: Top 21% in UML Diagram

Ranked by MRR among everyone on Upwork with the skill.

  1. #4Entity Relationship Diagram9 freelancers · 🇧🇩 #1Top 44%
  2. #8UML Diagram38 freelancers · 🇧🇩 #2Top 21%
  3. #748CodeIgniter3,448 freelancers · 🇧🇩 #24Top 22%
  4. #1,433Web Scraping3,925 freelancers · 🇧🇩 #124Top 37%
  5. #1,576Bootstrap6,899 freelancers · 🇧🇩 #92Top 23%
  6. #2,042jQuery8,973 freelancers · 🇧🇩 #101Top 23%
  7. #3,470Laravel12,549 freelancers · 🇧🇩 #142Top 28%
  8. #3,730MySQL14,471 freelancers · 🇧🇩 #165Top 26%