# SK Sahinur Islam — Profile & Technical Resume

> SK Sahinur Islam is a Senior Web Application Developer, Co-Founder, and IT Engineer based in Kolkata, West Bengal, India.

## Summary
- **Current Primary Role**: Senior Web Application Developer at Ib Arts (Jul 2026 – Present), specializing in Backend Architecture & DevOps Infrastructure.
- **Co-Founder**: WEFIK (Mar 2021 – Present), digital agency serving 30+ clients across 5+ countries.
- **Freelance**: Top-Rated Full-Stack Developer on Upwork (Apr 2025 – Present).
- **Previous Role**: Quality Assurance Trainee at ARC Document Solutions (Sep 2025 – Jun 2026).
- **Education**: B.Tech in Information Technology from Guru Nanak Institute of Technology (GNIT), Kolkata (2021–2025, CGPA 8.17).
- **Patent Holder**: Patent No. 202531060002 A — Solar Powered IoT Vaccine Preservation System with MQTT Telemetry & Zone-wise Peltier Cooling (Granted Jul 4, 2025).

## Contact & Links
- **Official Website**: https://sksahinurislam.dev
- **Email**: sahinurislamm2002@gmail.com
- **LinkedIn**: https://www.linkedin.com/in/sksahinurislam/
- **GitHub**: https://github.com/GeniousSonu
- **Upwork**: https://www.upwork.com/freelancers/~0104912246c7c7bdbf
- **Linktree**: https://linktr.ee/sksahinurislam
- **Location**: Kolkata, West Bengal, India (Timezone: IST, UTC+5:30)

## Core Technical Stack
- **Languages**: JavaScript, TypeScript, Python, PHP, C++, SQL, HTML5, CSS3
- **Frontend**: React, Next.js, Gatsby, HTML5/CSS3, GSAP, WebGL, TailwindCSS
- **Backend & APIs**: Node.js, Express, Laravel, FastAPI, REST APIs, GraphQL, MQTT
- **Databases**: MongoDB, MySQL, PostgreSQL, Redis, Pinecone Vector DB
- **DevOps & Linux**: Linux Server Admin (Ubuntu/Debian), Docker, Nginx, CI/CD, AWS, Bash Scripting
- **Cybersecurity & IoT**: Network Security, Pen Testing basics, CompTIA A+ concepts, NodeMCU, ESP8266, Embedded Systems
- **Certifications**: 30+ certifications from CompTIA, TryHackMe, Coursera (IBM, Duke, UC Irvine), Udemy, and LinkedIn Learning.

## Career History
1. **Senior Web Application Developer at Ib Arts** (Jul 2026 – Present | Kolkata, India)
   - Backend architecture, RESTful API design, Docker containerization, CI/CD pipelines, high-availability server configurations.
2. **Quality Assurance Trainee at ARC Document Solutions** (Sep 2025 – Jun 2026 | Kolkata, India)
   - Quality assurance, document processing pipeline validation, technical test documentation, regression testing.
3. **Co-Founder at WEFIK** (Mar 2021 – Present | Remote)
   - Led 30+ web and mobile solutions projects globally across 5+ countries.
4. **Freelance Full-Stack Developer on Upwork** (Apr 2025 – Present | Remote)
   - Shipped custom MERN, Laravel, WordPress, and AI-integrated applications for global clients.
5. **Head of Development at Teenager Esports** (Sep 2023 – Feb 2024)
   - Built tournament systems and streaming API infrastructure.
6. **Web Developer at Guru Nanak Institute of Technology** (Jul 2023 – Feb 2024)
   - Built institutional portals, event management systems used by 3,000+ students.

## Key Projects
- **LearnAI**: Adaptive intelligent tutoring system with MERN stack + Python ML microservices.
- **Solar IoT Vaccine Preservation System**: Patented hardware/software cold chain preservation system with MQTT & Peltier cooling.
- **WEFIK Platform**: Production SaaS digital agency platform serving global clients.