About

Jason Hiew Weng Yee (he/him)

Resume / CV: resume.pdf
Old portfolio (v1)

Skills:

Backend: .NET, NestJS, NodeJS, Ruby on Rails
Frontend: React, React Native
Scripting: Python (for very basic image classification), Ansible (for local CI/CD deployment)
Hosting: fly.io, Railway, Heroku (Rarely), Digital Ocean (Rarely), AWS EC2 (Rarely)
CI: Github Actions, CircleCI, Bitrise (Mobile), TeamCity
OS:
- Work: MacOS and Linux
- Non-work - Windows / SteamOS my beloved

Miscellaneous:
CSS: Tailwind, SCSS
State management: Redux, Redux Saga, Zustand
UI component libraries: AntDesign, Mantine, Chakra UI, daisyUI
Frameworks: Vite, Next.js, CodeIgniter
VCS tools: Github, Bitbucket
Agentic AI: Hermes (self-hosted, always-on), Claude Code
- Hermes runs my reminders, notes and most of my side projects on a small VPS.

Working knowledge:
Languages: Javascript, Ruby, C#, Java (Used in university), C (Used in university)
Native mobile: Android - XML (Used in university)
Backend frameworks: CodeIgniter (Used in university)

Misc misc:
Practices TDD development for anything except small personal projects

Experiences:

Dec 2025 - Present — Nexcode / NodeVerse

Backend Engineer

• Build and maintain a multi-tenant REST API (.NET 8, PostgreSQL, Dapper) backing a POS, admin console, and customer mobile app.
• Deliver features end to end — schema design, domain services, background jobs, audit trails — and break large epics into stacked, independently reviewable PRs.
• Replaced hardcoded configuration with a data-driven model, and planned the production migration of thousands of existing records around shared and orphaned rows.
• Identified and fixed critical authorization flaws (cross-tenant writes, privilege escalation) and introduced per-endpoint permission enforcement where none existed.
• Diagnose production performance and data-integrity issues: slow queries, request latency, and reporting discrepancies traced back to upstream data modeling.
• Refactor legacy data access toward a modular service pattern with consistent transactions, error handling, and validation across modules.

May 2025 - Nov 2025 — Freelance, Remote

Freelance Web Developer

• Developed responsive and high-performance landing pages for marketing and branding projects using React.js and Next.js.
• Built and deployed a landing page for a study platform, focusing on usability, responsive design, and conversion optimization.
• Collaborated with clients to design and implement marketing-focused web solutions that align with brand identity and campaign goals

Sep 2022 - May 2025 — Upstack Studio Sdn Bhd, Remote

Fullstack Software Engineer

• Developed new features and maintained a cross-platform (iOS & Android) React Native Tele-medicine app (React Native, Redux Saga, Typescript)
• Developed and maintained a NestJS app (Cat cataloging app with AI facial recognition)
• Developed and maintained Ruby on Rails apps
• Maintained automated CI/CD pipelines for Bitrise (Mobile)
• Developed and maintained automated CI/CD pipelines with CircleCi and Fly.io (Backend)
• Worked with page builders (i.e. Webflow, Wordpress, Shopify, Carrd etc)

Mar 2022 - Aug 2022 — SysArmy Sdn Bhd, Bandar Sri Permaisuri, Cheras

Security Analyst Intern

• Performed real time security monitoring for client sites using SIEM and maintained network and security devices
• Acted as the first level support of monitoring and investigations in the Security Operations Centre (SOC).
• Performed hands on security investigation for security event alerts in SIEM dashboard
• Liaised with System, Network and Firewall Administrator for investigations.
• Handled, validated, and investigated security events
• Reviewed and analyzed logs files, system messages, event details, network packets for investigations
• Managed and followed cases with clients, providing remediation for open cases and close cases accordingly
• Managed and provided reporting documentation for client sites (daily and monthly reporting)
• Performed basic forensic investigation
• Complied with the Information Security Policy in the organization

Dec 2017 - Mar 2018 — International Islamic University Malaysia, Kuantan, Pahang

Software Developer Intern

• Successfully completed and launched the Visitor Management System in 2018 which is still used daily
• Tech used: Firebase, Javascript, NodeJS, HTML, CSS
• Utilizes a MyKad reader to automatically check in or out visitors
• Has a Web app for desktop and an Android app for mobile
• Staff can use the Android app to view visitors who are in the campus