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Po Yi Zhi

Senior Software Engineer

About

Hi there! I'm a self-taught developer with a background in mechanical engineering (graduated from Multimedia University). After discovering my passion for web development, I made a career change and became a frontend web developer. Currently working as a Senior Software Engineer in Renalworks.

I'm passionate in learning new technologies, building responsive websites, and documenting my working process when it comes to complicated features.

Here are a few technologies I've been working with recently:

  • JavaScript
  • React
  • NextJs
  • Vue
  • TypeScript
  • Redux
  • Material UI
  • jQuery

Career Timeline

Renalworks Malaysia Sdn. Bhd.

May 2024 - Current

  • Delivered 150+ production-ready features across 4 core modules and 1 supporting web application, with primary contributions to Clinical, Entity Management, Inventory Management, and Weight Data System, using React, TypeScript, Redux, and Material UI
  • Led 3 technical proof-of-concepts for data visualization, rich-text editing, and laboratory OCR, researching suitable libraries and developing prototypes to demonstrate feature feasibility to Business Analysts; all 3 PoCs were subsequently adopted as production features
  • Facilitated sprint planning and effort estimation by leveraging historical delivery metrics, improving planning accuracy and enabling predictable sprint outcomes
  • Reviewed pull requests to uphold engineering standards, improve maintainability, optimize performance, and promote knowledge sharing across the team
  • Built reusable and maintainable UI components, reducing duplicated implementation and improving development consistency across multiple modules
  • Designed and implemented interactive laboratory dashboards using Chart.js, enabling clinicians to visualize patient laboratory trends and make faster, data-driven decisions
  • Developed and enhanced inventory management workflows, improving medical supply tracking, reporting accuracy, and operational efficiency
  • Resolved 50+ critical production issues, performing root-cause analysis and delivering reliable fixes to maintain high system availability and minimize downtime
  • Coordinated release activities across development and production environments, ensuring smooth deployments with minimal disruption to users
  • Partnered with Product Owners, QA engineers, designers, and business stakeholders to translate complex business requirements into scalable technical solutions
  • Improved overall test coverage from 60% to 75% by expanding unit tests, updating existing test suites, and maintaining unit testing practices across development

Red Ideas Sdn. Bhd. (JagaApp)

July 2023 - April 2024

  • Proactively addressed and resolved software issues by diligently troubleshooting and fixing bugs, as reported through raised bug tickets.
  • Managed module migration, strategically refactoring code to improve readability and performance.
  • Executed a comprehensive revamp of logs for existing modules, improving tracking and monitoring capabilities for enhanced system management.
  • Engaged in discussions with various departments to gather and understand their specific requirements, aligning development efforts with organizational objectives.

Limit Technology Group

May 2022 - July 2023

  • Developed and maintained Shopify e-commerce storefronts by implementing custom features using JavaScript, jQuery, HTML, CSS, and Shopify Liquid
  • Collaborated closely with designers and QA engineers to redesign the FlowerChimp shopping cart experience, simplifying the checkout journey and improving overall user experience
  • Revamped the FlowerChimp homepage and product pages to improve customer engagement, visual consistency, and product discoverability
  • Migrated legacy Shopify themes from Online Store 1.0 to Online Store 2.0, modernising storefront architecture and improving long-term maintainability
  • Optimised frontend performance using browser performance profiling, reducing Cumulative Layout Shift (CLS) from 0.19 to 0.025, improving Core Web Vitals and Lighthouse performance scores
  • Improved website loading performance through code splitting, lazy loading, deferred scripts, and asset optimisation

The Hacker Collective

October 2021 - April 2022

  • Build reusable and maintainable components that helps to improve and speed up development processes
  • Collaborated with backend developers and designers to deliver responsive, accessible, and cross-browser compatible web applications
  • Built landing pages and marketing websites using modern frontend technologies while maintaining responsive design best practices using Nuxt3 and TailwindCSS

Durianê Professional Sdn Bhd

August 2019 - October 2021

  • Prepared engineering proposals, cost estimations, and feasibility studies to support client decision-making during project planning
  • Produced technical documentation, design specifications, tender documents, and evaluation reports, assessing contractor pricing, technical compliance, and project capabilities
  • Designed fire protection systems for semiconductor manufacturing facilities and commercial buildings in compliance with Malaysia Standards (MS), NFPA, and FM requirements, ensuring regulatory approval and insurance compliance
  • Coordinated with architects, surveyors, contractors, and multidisciplinary engineering teams to streamline design reviews, resolve technical issues, and ensure successful project delivery.