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Professional summary

Kalaiselvan Thiyagarajan

Senior Full-Stack & Mobile Engineer

Dubai, United Arab Emirates

codeforcrack@gmail.com+971 588648533linkedin.com/in/kalaiselvagithub.com/codeforcrack-kalai

Profile

Resourceful and innovative Full Stack Developer with over 10+ years of professional experience across scalable web architectures, cross-platform mobile apps (Flutter, Dart), event-driven microservices (Apache Kafka, RabbitMQ), payment gateways (UPI / IppoPay), and cloud infrastructure (AWS, GCP, Docker, Kubernetes). Proven track record delivering production platforms for top brands and enterprise organizations across the UAE and internationally.

Professional experience

March 2024 – PresentAbu Dhabi, UAE

Full Stack Developer

Core42 / Injazat

Architecting and maintaining enterprise full-stack web applications and digital platforms using modern technology stacks.

  • Develop full-stack web applications using Vue.js, React.js, Node.js, C#, .NET Core, MS SQL, and MongoDB.
  • Design high-throughput backend microservices, transactional endpoints, and real-time streaming architectures.
  • Collaborate with cross-functional engineering teams to implement secure, modern, scalable digital platforms.
March 2021 – 2024Dubai Marina, UAE

Senior Full Stack Developer

Nathan & Nathan / Nathan Digital

Led full-stack web, Flutter mobile engineering, and event-driven architecture for fintech and enterprise workforce systems.

  • Developed cross-platform Flutter mobile applications for Fintech, HR Direct, Accounts, and Payroll targeting Android and iOS.
  • Built custom Payment Gateway Service using UPI payment methods (IppoPay), architecting seller payouts and transactional API workflows.
  • Designed and implemented microservices to handle real-time data streaming, event processing, and push notifications with Apache Kafka and RabbitMQ.
  • Integrated enterprise ERP modules covering inventory management, human resources, and financial accounting.
July 2019 – 2021Dubai DMCC, UAE

Full Stack Developer

Boopin Media Agency

Delivered high-performance web systems and eCommerce solutions for major regional clients.

  • Developed and maintained high-traffic web applications using PHP, MySQL, Laravel, and customized WordPress architectures.
  • Engineered and deployed secure Laravel-based eCommerce websites with payment gateways (PayTabs, PayPal, CCAvenue) and SSO login APIs.
April 2019 – July 2019Coimbatore, India

Full Stack Developer

Nexware Technologies Pvt Ltd

Developed and deployed Angular, CodeIgniter, and Laravel-based eCommerce websites with integrated payment workflows.

June 2016 – March 2019Tirupur, India

Full Stack Developer

Techmyntra

Built scalable backend solutions with PHP, CodeIgniter, Angular, and Laravel. Developed GST billing software, bulk SMS messaging infrastructure, and payment gateway solutions.

Verified Certifications

Notable Organizations & Brands

Porsche, CHANEL, KFC Dubai, DIFC Courts, dnata logistics, De'Longhi, UAE 50th & 51st National Day, Amity University Dubai, IKEA, Majid Al Futtaim, Hydro Way, Fitbit Official Gallery, Envato Market.

Education

Bachelor of Engineering (B.E.) — Computer Science & Engineering (2017)
Kalaignar Karunanidhi Institute of Technology (Anna University), Coimbatore, India

Diploma in Computer Technology (DCT) (2014)
Kongu Polytechnic College, Erode, India

Technical competencies

AI, Vector Intelligence & Vision: Custom Agents Development, GitHub Copilot, MCP Servers (Model Context Protocol), alibaba/zvec Vector Database, Unlimited-OCR Document Vision, Google Antigravity Tools, RAG & Embedding Pipelines.

Backend & Distributed Systems: PHP 8 / Laravel, Node.js / Express, .NET Core, C#, Go, CodeIgniter, MySQL & PostgreSQL, MongoDB & Redis, Kafka & Message Queues.

Modern Frontend & Web Apps: JavaScript (ES6+), Vue.js & Nuxt.js, React.js, HTML5 & Semantic Web, CSS3 & Tailwind CSS, Bootstrap, AR.js.

Mobile & Wearable Engineering: Flutter / Dart, Fitbit SDK, iOS / Android Release, State Management, Device Sensors.

Cloud, Infrastructure & DevOps: Docker, Kubernetes, AWS (EC2, S3, RDS), Nginx & Apache, Linux / VPS Admin, Git & CI/CD Pipelines.

Selected projects

UAE National Day Official Portal

Engineered the official web portal celebrating the UAE National Day, built to support heavy concurrent traffic spikes during national celebratory periods with strict uptime and responsiveness benchmarks.

PHP / Laravel / JavaScript / Responsive UX / Nginx

HR Direct Mobile Application

Engineered a comprehensive human resources and enterprise mobility application deployed natively to the Apple App Store and Google Play, facilitating mobile attendance, employee self-service, and approval workflows.

Flutter / Dart / iOS UIKit / Android / REST APIs

KFC Dubai Interactive Gaming Portal

Built an interactive gaming and digital campaign engagement platform for KFC Dubai, supporting gamified promotional mechanics, real-time leaderboard tracking, and high-volume consumer traffic.

Full-Stack Web / JavaScript / PHP / MySQL / UI/UX

Garuda VPN Commercial Client

Engineered and published a commercial-grade Flutter VPN application template on CodeCanyon, complete with server switching, protocol bindings, and subscription architecture.

Flutter / Dart / Networking / Platform Channels / In-App Purchase

Sensor-Driven Fitbit Smartwatch Faces

Authored published clock faces on the Fitbit OS App Gallery (Mystic Mandala & Black Pink), combining high-resolution visual art with low-power hardware sensor data.

Fitbit OS SDK / JavaScript / SVG Vector / Sensor APIs / Battery Optimization