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Hariaran Jayasangar

@hariaranjayasangar

Senior Software Engineer at WHOLLYGREENS SDN BHD who developed an AI forecasting platform monitoring 200+ production models.

Malaysia

Message

What I'm looking for

I'm seeking opportunities to leverage my technical leadership and software architecture expertise to build scalable, high-impact products.

At WHOLLYGREENS SDN BHD, I lead architecture and development across web, mobile, AI, and IoT systems. I own the full SDLC, from requirements gathering through deployment and production support.

I developed the AI sales forecasting platform using Python, CatBoost, Pandas, and Airflow, covering feature engineering, model training, deployment, and monitoring for 200+ production ML models. The platform improved demand planning and reduced wastage.

I was the sole architect and developer of the Nomzy React Native (Expo) apps for Android and iOS, supporting 5,000+ users. I managed API integration, testing, app releases, and ongoing production support.

Earlier, at Wentel Engineering SDN BHD, I developed a web-based NCMR system that replaced paper approval processes and reduced processing time from days to hours. I also developed Odoo ERP customizations and an E-Visa module at Buzznet SDN BHD, and worked on vehicle parking management and e-commerce systems in earlier roles.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

WHOLLYGREENS SDN BHD

Apr 2024 - Present (2 years 6 months)

Led architecture, design, development, deployment, and production support for web, mobile, AI, and IoT systems, owning the full SDLC. Technical lead for customer web portal and internal CRM platforms, and sole architect of React Native mobile apps supporting 5,000+ users.

React TypeScript Vite Tailwind fastAPI PostgreSQL React Native Expo Firebase FCM Python CatBoost Pandas Airflow GitLab CI CD Docker AWS GCP Nginx Podman Kotlin Swagger OpenAPI

Software Engineer

Wentel Engineering SDN BHD

Oct 2022 - Mar 2024 (1 year 5 months)

Designed and developed a web-based Nonconforming Material Report (NCMR) system using pure PHP and SQL Server, automating approval workflows and reducing processing time from days to hours. Built custom Excel automation tools using VBA.

PHP JavaScript SQL Server HTML CSS Excel VBA SQL Server Management Studio Microsoft Dynamics NAV

Python/Odoo Developer

Buzznet SDN BHD

Oct 2021 - Sep 2022 (11 months)

Developed and customized Odoo ERP modules for multiple clients, including a custom E-Visa module for a Malaysian government project with iPay88 payment gateway integration and OpenCV passport photo validation. Led automation logic for quotation workflows.

Python Odoo XML JavaScript IPay88 OpenCV PostgreSQL

Software Engineer

WEI LONG ELECTRONICS ENGINEERING (M) SDN BHD

Apr 2021 - Sep 2021 (5 months)

Maintained and enhanced a centralized vehicle parking management system built with Yii2, and built new reporting modules to automate financial settlement between mall operators and payment providers. Contributed to planning a new RFID-based Laravel payment system.

PHP Yii 2 MySQL JavaScript jQuery Bootstrap Laravel RFID

Junior Software Developer

E-GlobalSCM Solutions Sdn Bhd

Apr 2020 - Mar 2021 (11 months)

Developed and customized core Odoo ERP modules for SME clients in logistics and supply chain. Designed and built a WooCommerce-based e-commerce website and conducted SEO audits using Google Search Console and Yoast SEO.