Abu Hasan Rumi

Core Skills

• Core: HTML5, CSS3, SASS/SCSS, JavaScript (ES6+), TypeScript
• Frameworks: React.js, Next.js, Vue.js, Tailwind CSS, Bootstrap
• UI Libraries: shadcn/ui, Chakra UI, Ant Design (AntD), Radix UI, Framer Motion
• State/Data: Redux, Context API, Zustand, TanStack Query, SWR, REST APIs, GraphQL
• React Ecosystem: React Router, React Hook Form, Axios, Dynamic Imports, Code Splitting
• Validation: Zod, Yup
• Backend/Familiar: Node.js, Express.js, Prisma ORM, Mongoose, PostgreSQL, Firebase, MongoDB, JWT
• Testing: Jest, React Testing Library
• Tools: Git, GitHub, GitHub Actions, Vite, PostCSS, Postman, Chrome DevTools, VS Code, NPM
• Other: Web Performance Optimisation, Core Web Vitals, Browser Rendering & DOM/Virtual DOM, Responsive Design, Accessibility Basics, Reusable Component Architecture, Code Review, Agile/Scrum

Work Experiences

• Translated Figma and design mockups into pixel-perfect, responsive React and Next.js components deployed across 300+ merchant storefronts, maintaining visual consistency at scale.
• Used JavaScript to directly manipulate the DOM on Shopify storefronts, injecting and updating UI elements outside the React app's render tree to integrate with theme markup and third-party scripts across varied storefront environments.
• Improved cart loading performance and resolved Shopify AJAX API rate-limiting issues by implementing a dynamic import-based cart experience supporting 70+ upsell widgets, applying browser rendering and Virtual DOM diffing principles to achieve smooth, non-blocking rendering.
• Refactored core feature architecture across multiple product areas, improving developer experience, reducing fragile code flows, and making the codebase significantly easier to extend and maintain.
• Implemented a monorepo architecture to share business logic, utilities, and core functions across different parts of the Shopify app, keeping UI layers separate and independently maintained per surface.
• Introduced JSON-structure-based reusable content system for the dashboard's widget creation flow, reducing duplication and streamlining how merchants configure and launch campaigns.
• Led and mentored a team of 10-15 developers through code reviews, task planning, and implementation guidance, improving team delivery consistency and code quality across releases.
• Collaborated with product, design, QA, and support teams to ship stable releases aligned with merchant feedback and business goals.
• Contributed to growing the product's MRR from ~$3K to $10K+ through improved product stability, UI quality, and feature delivery.

Soft Skills

• Communication: Comfortable working with product teams, support teams, merchants, and technical teammates.
• Collaboration: Experienced in working with developers, designers, QA, and product stakeholders.
• Problem Solving: Strong production debugging experience across frontend, Shopify themes, APIs, and third-party integrations.
• Leadership: Experience planning tasks, reviewing code, guiding junior developers, and improving team delivery.

Education

• BSc, Computer Science and Engineering (CSE)
  University of South Asia – Dhaka, Bangladesh
• Diploma in Engineering, Telecommunication Technology
  Grade: 3.83 out of 4
  Feni Computer Institute – Feni, Bangladesh

References

• Opu Hasnat, Technical Support Engineer @ CHEQ
  Managed me directly
• MD Zulhaz Uddin Joy, Senior Software Engineer @ DevsNest LLC
  Managed me directly