Top Rated Plus on Upwork

I build scalable web
solutions for growing
businesses

15+ years of experience building production-grade web applications and AI-powered systems. I help businesses turn ideas into scalable, secure, and high-performance software.

Available for new projects
Trusted by clients
from 6 countries
πŸ‡ΊπŸ‡ΈUSA
πŸ‡¦πŸ‡ΊAustralia
πŸ‡¨πŸ‡¦Canada
πŸ‡ΈπŸ‡¦Saudi Arabia
πŸ‡ΉπŸ‡­Thailand
πŸ‡ΈπŸ‡¬Singapore
What I Do

End-to-End Solutions That Drive Results

From architecture to deployment, I provide complete solutions that help your business grow and scale.

Backend Engineering

  • β€’Scalable API Architecture
  • β€’Laravel / NestJS Development
  • β€’Authentication & RBAC
  • β€’Database Design & Optimization
  • β€’Queue Systems & Async Jobs
  • β€’Payment & Third-Party Integrations

Frontend Development

  • β€’Next.js & React Applications
  • β€’TypeScript & Modern UI/UX
  • β€’SEO Optimized Solutions
  • β€’Responsive & High Performance
  • β€’Real-time Features
  • β€’Dashboard & Admin Panels

AI & Automation

  • β€’LLM Integrations (OpenAI, Claude)
  • β€’AI Chat & Assistant Systems
  • β€’Workflow Automation
  • β€’RAG & Vector Search Solutions
  • β€’AI-powered Business Tools
  • β€’Data Processing & Insights

DevOps & Infrastructure

  • β€’Docker & Containerization
  • β€’AWS / DigitalOcean / VPS
  • β€’CI/CD Pipeline Setup
  • β€’Redis & Cache Optimization
  • β€’Monitoring & Logging
  • β€’Scaling & Performance Tuning
Featured Projects

Real Solutions. Real Impact.

Here are some of the projects I've developed and built for clients.

Car Booking Engine

Car Booking Engine

Developed and optimized a high-performance, live-booking aggregation engine for one of the Southern Hemisphere's largest OTAs. Built direct API integrations with Gold Standard suppliers (Avis, Hertz, Enterprise, Sixt), managing real-time inventory and pricing across 5 nations. Implemented multi-vertical booking systems for Cars, Campervans, and Trucks/Utes, supporting over 4 million successful rentals.

LaravelRedisREST APIMySQLAWSReactDistributed System
Result: 4M+ rentals, sub-second response times
View Project
Travel, Cruise & Hotels

Travel, Cruise & Hotels

Re-architected a legacy monolithic ecosystem into a decoupled, high-performance RESTful API server. Modernized the frontend from CodeIgniter to Next.js, improving page load speeds by 40%. Engineered an asynchronous processing layer using Redis/SQS for complex travel itinerary generation and bulk supplier data synchronization.

Next.jsLaravelREST APIRedisSQSPostgreSQLDocker
Result: 40% faster loads, 99.9% uptime
View Project
Game & Software Price Comparison

Game & Software Price Comparison

Developed and scaled a robust price comparison marketplace for video games, DLCs, prepaid cards, software, and gaming hardware. Built real-time price aggregation and affiliate retailer integrations, enabling users to compare CD key offers across multiple partner stores. Implemented features like price-drop notifications, a rewards program, and newsletter automation to drive user engagement and retention.

SymfonyCacheLinuxDockerMySQLRedisREST API
Result: Extensive game catalog, commission-based revenue model
View Project
Why Clients Hire Me

More Than Code. I Deliver Value.

Business-Focused Approach

I focus on solving real business problems and delivering measurable results.

Architecture-First Mindset

I design scalable, maintainable, and future-proof architecture from day one.

End-to-End Ownership

From planning and development to deployment and optimization, I handle the full lifecycle.

Modern & AI-Assisted Development

I leverage AI tools and modern workflows to build faster without compromising quality.

Clear Communication & Reliability

Transparent communication, on-time delivery, and long-term relationship are my priorities.

Social Proof

Trusted by Clients. Proven by Results.

25,000+
Total Upwork Hours
100%
Job Success Score
Top Rated Plus
Upwork Status
15+ Years
Of Professional Experience

β€œAbu was a pleasure to work with. He is professional, reliable, and a very hard worker. Always positive, he works well both independently and as part of a team. He consistently made himself available when needed and brought creative, out-of-the-box thinking to every project. Abu stays up to date with best practices and modern frameworks, ensuring high-quality results. I highly recommend him for full-stack development work.”

UC
Upwork Client
Verified Review

β€œI can't recommend Abu enough. He was a pleasure to work with from start to finish. Abu demonstrated strong technical expertise across both front-end and back-end development, delivering clean, efficient code and thoughtful solutions throughout the project. He is a very hard worker, listener and problem solver. I came to him only with an idea and he built it from scratch. Communication was clear, prompt, and professional, and he consistently met (or beat) deadlines. What really stood out was his proactive approach to solving problems and suggesting improvements that added real value. I will absolutely hire Abu again for future projects and recommend him to anyone looking for a skilled and dependable developer.”

UC
Upwork Client
Verified Review

β€œAbu Saleh is one of the best developers I've ever worked with on Upwork. He not only can accomplish any job presented to him, but he makes really sound judgements on how to fill in all the gaps that were previously undefined. In addition to this, he has exceptional leadership skills as he led our team of developers to complete the project at hand. We have already re-hired him for our next project. Highly recommend.”

UC
Upwork Client
Verified Review

Explore My Work

See more of my projects, case studies and technical solutions.

portfolio.asmshaon.tech

Read My Insights

Technical articles, tutorials and insights on development and architecture.

blog.asmshaon.tech

Let's Build Something Great Together

Have a project in mind? Let's discuss how I can help you achieve your goals.

Location

Dhaka, Bangladesh

WhatsApp

+88 01748 966 158

Email

srabon.php@gmail.com