Experience

Technext Limited

• United Kingdom
• Business Consulting and Services

• Senior Software Engineer

  • Mar 2022 - Present

  ● Worked on a Large Scaled Event based system. Designed the Server Side Architecture, Security, Infrastructure Ecosystem, Client Side Architecture. ● Designed Database Schema (best practice) based on business requirements. ● Fixed the Cloud Infrastructure by solving errors like Bad Request, Connection Timeout etc, improved security layer of Reverse Proxy, as well as Firewalls. ● Improved Code Quality with Separation of Concern, Single Responsibility(Single Level of Abstraction), Open/Closed Principle. ● Improved the First Contentful Paint with Image Preloading, adopted WebP Images & Font. ● Converted the React version of our flagship product Falcon to Next.js version, improved the client side storage system as well as Accessibility. ● Served static contents through CloudFlare as CDN and improvements on Network Request. ● Worked on stale-while-revalidation caching strategy in client side. ● Created CI/CD pipeline and Automated Workflows with GitHub Actions and BitBucket Pipeline. ● I mentored a team, they converted Official Website from a static site to a dynamic WordPress site. ● Mentored a team working on WordPress plugin. ● Associated in Code Review. Show less



ShohozDeal Ltd.

• Bangladesh
• IT Services and IT Consulting
• 1 - 100 Employee

• Senior Software Engineer

  • Aug 2021 - Feb 2022

  A Startup. I led and worked on a large scale multi vendor ecommerce platform and some client work. ● Server-side: Clean Code, efficient Asynchronous operation, Rest API best practices, Compressed the API (client got the response less size), secured API through Token based authentication technique, Unit Testing and Re usability, Service Based Architecture. ● Cloud: Designed the Cloud Security Group, IAM policies forsecurity perspective. ● CI/CD: Wrote Continuous Integration with GitHub Action. ● Database: Efficient Schema Design, Indexing and Encryption Decryption sensitive information. ● Client-side: Semantic HTML, proper reusability with SCSS, reduced bundled size with React Suspense (got huge perf improvements on initial loading), fixed memory leaks issue (perf improvements on slow network), used SWR (for caching the responses for products to make user experience good), lazy load the products list (got significant fast loading), handled 50+ use case testing (Unit, Integration), fixed bottlenecks using React Devtools Profiler section. ● Security: Designed Rate Limiter for brute force attack, applied proper token based authentication system using both Access Token and Refresh Token, handled XSS attack on both server and client side, and JavaScript Vulnerabilities. ● Provided Mentorship to 10+ fresh graduate junior developers. Show less



Authlab Limited

• Bangladesh
• IT Services and IT Consulting
• 1 - 100 Employee

• Software Engineer

  • Aug 2018 - Aug 2021

  Worked and Maintained a large scale web application. - Using tools: Nods.js/Express.js, MongoDB/Mongoose, Vue.js/Nuxt.js, Docker, Nginx. - Clean Code Architecture, Server side Scalability, Rest API Best practices. - Scaled 3k+ concurrent API Requests. - Database Schema Design, Optimising Database for maximum speed, Scalability. - Optimised Database Query for 10k+ data (with both Single Key Index and Compound Index) and fetched data within 1-2 milliseconds. - Security improvement. - Unit Testing on Server Side.WPManageninja - Worked on the wordpress plugins like Payment and Donation, Mortgage Calculator, Amazon Affiliates plugin. - Created some integrations for Form and Payment plugins that helped their business immensely and gained customer satisfaction. - Bug Fix, Added new features to existing Wordpress Plugins(active users of it are around 300,000+). - Developed a couple of GutenBerg WordPress Plugins with React or JSX. - Created Gutenberg wordpress plugins, some notable blocks are Comparing Two Images, PostGrid Block, Raw Layout.- Conducted several online learning sessions. Show less

• Web Development Intern

  • Mar 2018 - Jul 2018

  Worked as an intern. Made Wordpress Plugin(front-end) with JavaScript & Vue.js.