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shajibsikder
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### Backend Engineer | Full-Stack Systems Developer I design and build scalable backend systems, REST APIs, and web applications with a focus on performance, reliability, and maintainability. Currently handling system architecture at **Weekmotion**, optimizing core workflows to safely scale data pipelines, media delivery, and micro-transactions under high concurrency. 📊 *Reduced p95 API latency from 380ms to 220ms by restructuring MySQL composite indexes and implementing distributed Redis caching layers under peak traffic spikes.* > ⚡ *I focus on building simple, fast, and maintainable web systems that solve real-world problems.* --- <p align="left"> <a href="https://orcid.org/0009-0002-0393-4725" target="_blank"><img src="https://img.shields.io/badge/ORCID-A6CE39?style=flat-square&logo=orcid&logoColor=white" height="28" /></a> <a href="https://linkedin.com/in/shajibsikder" target="_blank"><img src="https://img.shields.io/badge/LinkedIn-0077B5?style=flat-square&logo=linkedin&logoColor=white" height="28" /></a> <a href="https://leetcode.com/u/shajibsikder/" target="_blank"><img src="https://img.shields.io/badge/LeetCode-FFA116?style=flat-square&logo=leetcode&logoColor=black" height="28" /></a> <a href="https://dev.to/shajibsikder" target="_blank"><img src="https://img.shields.io/badge/Dev.to-0A0A0A?style=flat-square&logo=devdotto&logoColor=white" height="28" /></a> <a href="https://www.codester.com/weekmotion/" target="_blank"><img src="https://img.shields.io/badge/Codester-FF5400?style=flat-square&logo=codersrank&logoColor=white" height="28" /></a> <a href="https://weekmotion.com/service" target="_blank"><img src="https://img.shields.io/badge/Weekmotion-FF5400?style=flat-square&logo=firefox&logoColor=white" height="28" /></a> <a href="https://wikigenius.org/wiki/Md_Shajib_Sikder" target="_blank"><img src="https://img.shields.io/badge/Wiki-410099?style=flat-square&logo=wikipedia&logoColor=white" height="28" /></a> <a href="https://www.youtube.com/@jagatbarta" target="_blank"><img src="https://img.shields.io/badge/YouTube-FF0000?style=flat-square&logo=youtube&logoColor=white" height="28" /></a> <a href="https://facebook.com/shajibno1" target="_blank"><img src="https://img.shields.io/badge/Facebook-1877F2?style=flat-square&logo=facebook&logoColor=white" height="28" /></a> <a href="https://instagram.com/shajibno1" target="_blank"><img src="https://img.shields.io/badge/Instagram-E4405F?style=flat-square&logo=instagram&logoColor=white" height="28" /></a> <a href="https://www.pinterest.com/shajibsikder1/" target="_blank"><img src="https://img.shields.io/badge/Pinterest-BD081C?style=flat-square&logo=pinterest&logoColor=white" height="28" /></a> <a href="mailto:im.mdshajib@gmail.com"><img src="https://img.shields.io/badge/Email-D14836?style=flat-square&logo=gmail&logoColor=white" height="28" /></a> </p> --- <b> 🛠️ Favorite Tools & Technologies </b> <table> <tr> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/PHP-Dark.svg" width="50" /><br>PHP</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/Laravel-Dark.svg" width="50" /><br>Laravel</td> <td align="center" width="96"><img src="https://techstack-generator.vercel.app/js-icon.svg" width="50" /><br>JavaScript</td> <td align="center" width="96"><img src="https://techstack-generator.vercel.app/mysql-icon.svg" width="50" /><br>MySQL</td> <td align="center" width="96"><img src="https://techstack-generator.vercel.app/restapi-icon.svg" width="50" /><br>REST API</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/NodeJS-Dark.svg" width="50" /><br>NodeJS</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/TailwindCSS-Dark.svg" width="50" /><br>Tailwind</td> </tr> <tr> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/Linux-Dark.svg" width="45" /><br>Linux</td> <td align="center" width="96"><img src="https://techstack-generator.vercel.app/nginx-icon.svg" width="45" /><br>Nginx</td> <td align="center" width="96"><img src="https://techstack-generator.vercel.app/docker-icon.svg" width="45" /><br>Docker</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/Redis-Dark.svg" width="45" /><br>Redis</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/Git.svg" width="45" /><br>Git</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/Github-Dark.svg" width="45" /><br>GitHub</td> <td align="center" width="96"><img src="https://raw.githubusercontent.com/tandpfun/skill-icons/main/icons/VSCode-Dark.svg" width="45" /><br>VSCode</td> </tr> </table> --- <details> <summary> <b>🏆 Client-Facing Platforms & Architectures Shipped</b> </summary> > Scalable software systems engineered and deployed for real-world production environments. | Project System | Engineering Focus | Link | | :--- | :--- | :---: | | 🎬 **Weekmotion** | Built a modular media backend with sequential chunk uploads, reducing web server process blocking spikes from 45% down to less than 15% via Redis async background queues. | [Visit](https://weekmotion.com/) | | 📰 **Jagatbarta** | Engineered a multi-tenant CMS increasing the Redis cache hit rate from 65% to 92% on core article endpoints, successfully eliminating disk I/O bottlenecks. | [Visit](https://jagatbarta.top/) | | 🏥 **All Doctors** | Implemented precise transaction isolation levels and row-level locking (`SELECT FOR UPDATE`), guaranteeing zero double-bookings across 500+ concurrent sessions. | [Visit](https://alldoctorskhulna.com/) | | 📦 **Microloop** | Developed a freelance marketplace using a stateless token infrastructure, handling secure digital license validation and scalable checkouts. | [View](https://www.codester.com/items/63796/microloop-micro-job-and-freelance-platform) | | 💻 **ARCreative** | Refactored internal background jobs and heavy asset optimization loops, drastically reducing server execution response delays. | [Visit](https://arcreativetechnology.com/) | | 💻 **DBN IT** | Tuned request-response routing loops and eliminated eager-loading query data bottlenecks to maintain highly predictable throughput. | [Visit](https://www.dbnit.com/) | | 📰 **DBN News** | Configured multi-tier caching architectures to seamlessly absorb unpredicted traffic spikes without connection pool starvation. | [Visit](https://dbnnews.com/) | | 📰 **Doyel24** | Engineered specialized relational data caching layers, reducing read-heavy database hit rates during real-time updates. | [Visit](https://doyel24.com/) | | 📰 **Tribune** | Orchestrated robust backend systems designed for low infrastructure overhead and fast server-side hydration cycles under load. | [Visit](https://primetribune.net/) | | 🏫 **School** | Developed a modern educational website with responsive architecture, structured content management, and optimized page delivery for reliable long-term administration. | [Visit](http://chowbariamalshirahighschool.edu.bd/) | | 🤝 **Servic** | Engineered a secure service marketplace with scalable order workflows, role-based access control, and optimized backend request processing. | [Visit](https://servicepartner.online/) | </details> --- <b> 📊 GitHub Profile Analytics </b> <p align="center"> <a href="https://github.com/shajibsikder"> <img src="https://github-readme-activity-graph.vercel.app/graph/?username=shajibsikder&bg_color=1F222E&color=F8D866&line=F85D7F&point=FFFFFF&hide_border=true" width="100%" /> </a> </p> --- <b> 📋 Architectural Focus </b> - **Performance Engineering:** Advanced MySQL index design, raw query optimization, and profiling slow transactional pathways. - **Asynchronous Task Processing:** Decoupling high-overhead tasks, notification triggers, and metrics aggregation utilizing Redis queues. - **System Architecture:** Building clean, resilient RESTful API specifications with strict type handling and stateless architecture models. - **Maintainable Infrastructures:** Writing multi-stage production Docker configurations and orchestrating reliable Nginx reverse-proxies. - **Data Consistency Optimization:** Managing race conditions, deadlocks, and relational integrity layers in high-concurrency SaaS applications.
