Tan Chin Siang
Contact
Available for opportunities

Hi, I'm Tan Chin Siang

Backend & Cloud Software Engineer

I design scalable Go microservices and cloud-native platforms across AWS and Azure, with a focus on event-driven systems, infrastructure automation, reliability, and cost optimization.

Malaysia

View My Work Download Resume

About Me

I’m a backend and cloud software engineer with more than four years of experience modernizing enterprise systems across cloud platforms, HR technology, environmental monitoring, IoT, and ERP.

My work spans Azure-to-AWS migration, Go microservice re-engineering, Terraform automation, Kafka-based integration, API architecture, observability, and Kubernetes deployments.

Recent work includes automating Azure IoT Hub capacity to control cost and prevent throttling. Earlier, I increased HR-platform throughput 3× to support more than 3,000 concurrent users and led a first Go microservice initiative.

Years Experience
4+
Companies
3
Featured Projects
6
Technologies
25+

Work Experience

Backend & Cloud Software Engineer

Electrolux Home Appliance Sdn Bhd

05/2026 – Present

Selangor, Malaysia

Cloud Platform Modernization

  • Participated in migrating enterprise backend services from Microsoft Azure to AWS, improving cloud scalability and simplifying long-term infrastructure management
  • Re-engineered existing backend microservices in Go to improve performance, maintainability, and resource utilization
  • Implemented Infrastructure as Code with Terraform for repeatable cloud provisioning and consistent environments
  • Developed event-driven integrations with Kafka and Azure Event Hubs for reliable asynchronous communication
  • Implemented automatic Azure IoT Hub SKU scaling based on real-time capacity utilization, reducing infrastructure cost while preventing service throttling
  • Optimized backend services and cloud resources through performance tuning, monitoring, and architectural improvements
  • Go
  • Python
  • Java
  • AWS
  • Azure
  • Terraform
  • MongoDB
  • Kafka
  • Kubernetes
  • Docker

Backend Software Engineer

Telekom Research & Development Sdn Bhd

05/2023 – 05/2026

Selangor, Malaysia

HR Systems (ERA/JESSICA)

  • Spearheaded backend enhancement and refactoring of a legacy HR system, improving scalability, maintainability, and performance by 3× to support more than 3,000 concurrent users
  • Proposed and led the company’s first Go-based microservice REST API, secured supervisor approval, and delivered the initial service to validate Go for production use
  • Developed secure REST APIs with Multi-Factor Authentication and Google reCAPTCHA integration
  • Implemented RabbitMQ-based asynchronous employee data synchronization and task scheduling
  • Integrated the LinkedIn API into the learning module for employee training and development insights
  • Instrumented services and metrics dashboards with Prometheus and Grafana

Smart Forestry Platform

  • Built data-driven dashboard APIs serving real-time animal population and environmental metrics
  • Designed Apache Airflow pipelines for automated SFTP data retrieval and processing
  • Created DAGs for end-to-end orchestration from extraction to centralized storage

IoT Water Monitoring (SWIMS2.0)

  • Implemented Keycloak authentication with Role-Based Access Control for secure user management
  • Developed high-performance REST APIs for real-time and historical water quality visualization and analysis
  • NestJS
  • TypeScript
  • Node.js
  • Go
  • MySQL
  • MariaDB
  • PostgreSQL
  • MikroORM
  • TypeORM
  • RabbitMQ
  • Apache Airflow
  • Kubernetes
  • Docker
  • Keycloak
  • OAuth
  • Prometheus
  • Grafana
  • Jest

Software Developer

Xeersoft Sdn Bhd

05/2022 – 04/2023

Kuala Lumpur, Malaysia

ERP Platform

  • Contributed to accounting-platform upgrades and feature improvements using modern web technologies
  • Developed and maintained PHP Slim 4 REST APIs for web and mobile application integrations
  • Implemented performance optimizations that improved ERP system efficiency and user satisfaction
  • PHP
  • Slim 4
  • MySQL
  • JavaScript
  • jQuery
  • Bootstrap
  • HTML
  • CSS

Featured Projects

Selected case study

IoT Cloud Cost Optimization

Company · Electrolux Home Appliance Sdn Bhd

Automated Azure IoT Hub capacity management and cloud provisioning to improve reliability and cost efficiency.

Problem
Fixed IoT Hub capacity created a tradeoff between paying for unused headroom and risking service throttling during utilization spikes.
Approach
Implemented utilization-driven SKU scaling, supported by Terraform-managed infrastructure, monitoring, and event-driven cloud integrations.
Result
Reduced cloud infrastructure cost while preserving capacity and preventing service throttling.

Architecture: Utilization-driven IoT capacity automation supported by Infrastructure as Code and event-driven integration.

  • Azure IoT Hub
  • Terraform
  • Kafka
  • Azure Event Hubs
  • Azure Monitor

Selected case study

HR Systems Modernization (ERA/JESSICA)

Company · Telekom Research & Development Sdn Bhd

Enhanced and refactored a legacy HR backend to improve scalability, maintainability, security, and production observability.

Problem
A legacy HR backend needed greater throughput, maintainability, security, and production visibility to support a growing internal user base.
Approach
Refactored backend services, introduced asynchronous RabbitMQ workflows, strengthened authentication, and added Prometheus and Grafana observability.
Result
Increased throughput 3×, scaling the platform from 1,000 to more than 3,000 concurrent users.

Architecture: Event-driven microservices with a centralized API gateway and RabbitMQ for inter-service communication.

  • NestJS
  • TypeScript
  • PostgreSQL
  • RabbitMQ
  • Prometheus

Additional projects

Azure-to-AWS Platform Migration

Company · Electrolux Home Appliance Sdn Bhd

Modernized enterprise backend infrastructure by participating in the migration of services from Microsoft Azure to AWS.

  • Moved enterprise backend services toward AWS cloud infrastructure
  • Improved cloud scalability
  • Simplified long-term infrastructure management
  • AWS
  • Azure
  • Go
  • Terraform
  • Kubernetes

Cloud-Native Go Microservices

Company · Electrolux Home Appliance Sdn Bhd

Re-engineered existing backend microservices in Go as part of a broader enterprise platform modernization effort.

  • Improved backend performance and resource utilization
  • Improved service maintainability
  • Optimized services through monitoring and architectural improvements
  • Go
  • Python
  • Java
  • Kafka
  • Kubernetes
  • Docker

Smart Forestry Platform

Company · Telekom Research & Development Sdn Bhd

A comprehensive monitoring platform for wildlife and environmental metrics using IoT and big data pipelines.

  • Built real-time dashboard APIs for animal population and environmental metrics
  • Automated SFTP data retrieval and processing with Apache Airflow
  • Designed DAGs from data extraction through centralized storage
  • Node.js
  • Apache Airflow
  • SFTP
  • PostgreSQL
  • Grafana

SWIMS 2.0 IoT Monitoring

Company · Telekom Research & Development Sdn Bhd

High-performance water quality monitoring system with robust authentication and real-time analytics.

  • Implemented Keycloak authentication and Role-Based Access Control
  • Developed APIs for real-time water quality visualization
  • Supported historical water quality data analysis
  • NestJS
  • Keycloak
  • IoT
  • Real-time Analytics
  • RBAC

Skills & Technologies

Programming Languages

  • Go
  • TypeScript
  • JavaScript
  • Python
  • PHP

Cloud Platforms

  • AWS
  • Azure

Backend Engineering

  • System Design
  • REST APIs
  • Microservices
  • Event-Driven Systems
  • Distributed Systems
  • High-Concurrency Services

Infrastructure & Delivery

  • Terraform
  • Docker
  • Kubernetes
  • GitHub Actions
  • CI/CD

Messaging

  • Kafka
  • RabbitMQ
  • Azure Event Hubs
  • AWS MSK

Databases

  • PostgreSQL
  • MySQL
  • MariaDB
  • MongoDB

Observability

  • Prometheus
  • Grafana
  • CloudWatch
  • Azure Monitor
  • Datadog

Security & Identity

  • IAM
  • OAuth2/OIDC
  • RBAC
  • Keycloak

Spoken Languages

  • English
  • Chinese
  • Malay

Working Style

  • Work Ethic & Ownership
  • Proactive Thinking
  • Continuous Improvement
  • Clear Written & Verbal Communication

What Colleagues Say

Selected recommendations from people who worked with me directly at Telekom R&D.

View LinkedIn profile

“Creative, inquisitive, and smart. He asks the right questions, challenges assumptions constructively, and brings a collaborative energy that makes any engineering team stronger.”

B. Joshua Adedigba Researcher · Telekom R&D Worked with Tan on the same team

“His ability to quickly learn JVM-based technologies and deliver meaningful results speaks volumes about his problem-solving abilities and adaptability.”

Lay Tzeh Wu Former teammate · Telekom R&D Worked with Tan on HR and IoT systems

How I Think & Work

Who I am

Curious by nature, accountable by choice.

I’m motivated by visible professional growth and by becoming the engineer a team can trust with unfamiliar, complex problems. I don’t stop at completing an assigned task: I work to understand why it matters, contribute ideas, and identify better ways forward. I learn quickly, take ownership, and keep going until I understand not only how something works, but how to make it useful, reliable, and better.

What I’m building toward

Engineering that creates value at scale.

I want to work on technology that produces meaningful value and impact. I’m especially drawn to ambitious, large-scale organizations where strong engineering decisions can improve systems used by many people.

Solve the real problem

Good engineering begins with understanding the actual need. Technology creates value only when it solves a meaningful problem for users or the business.

Design for change and scale

I value clean, maintainable systems that remain reliable as traffic and data grow, while staying easy to configure, extend, operate, and adapt.

Optimize the whole system

Quality means looking beyond code correctness to performance, reliability, operational simplicity, developer experience, and infrastructure cost.

Think beyond the task

I don’t treat requirements as a checklist. I seek the intent behind the work, surface risks, challenge assumptions constructively, and propose ideas that can improve the product, architecture, or delivery.

Continuous learning

Learning beyond the current stack

Reading is part of how I sharpen my engineering judgment. I actively study system design—how services remain available, observable, adaptable, and cost-efficient as traffic, data, and teams grow. I also explore AI, blockchain, Rust, quantum computing, and other emerging technologies that could shape what we build next.

  • Kafka in Action
  • 100 Go Mistakes and How to Avoid Them
  • Pro Go: The Complete Guide to Programming Reliable and Efficient Software Using Golang
  • Zero To Production In Rust

Education & Credentials

04/2018 – 04/2022 · Sepang, Malaysia

Bachelor of Engineering in Software Engineering (Honours)

Xiamen University Malaysia

  • Cumulative GPA: 3.05/4.00

01/2012 – 12/2017 · Kuala Lumpur, Malaysia

Malaysia Independent Chinese Secondary School Unified Exam (UEC)

Tsun Jin High School

  • UEC results: 2As and 4Bs
  • Volleyball Club Team Leader
  • Student Representative for Malay Subject

Let's Connect

I’m open to discussing backend and cloud engineering roles, platform modernization, and technically ambitious projects.

Say Hello
chinsiang99@gmail.com +60189170398