THE TIEN DAU

Software Engineer

Melbourne, VIC

Summary

I'm a Full-Stack Developer with 6+ years of experience specializing in Ruby on Rails and 2+ years of React development. Proven track record of building scalable, high-performance web applications and APIs, with expertise spanning backend development, front-end integration, CI/CD pipelines, and cloud deployment. Passionate about clean, test-driven code, system architecture, and solving real-world challenges.

Technical Skills

  • Languages: Ruby (6+ years), JavaScript (2+ years)
  • Frameworks: Ruby on Rails (6+ years), ReactJS (2+ years), Sidekiq
  • Databases: PostgreSQL
  • DevOps & Deployment: Docker, Nginx, Puma, Capistrano, GitHub Actions, Terraform, Linux
  • Cloud Platforms: AWS, Heroku
  • Testing: RSpec, Minitest, Jest
  • Other Tools: Git, Vim

Work Experience

Global Health – Melbourne, VIC

Full-Stack Developer (May 2023 – Present)

  • Implemented CI/CD and testing procedures by creating an optimised Git workflow, setting up Bitbucket pipelines, and developing a unit test suite achieving over 80% coverage.
  • Delivered the Hot Health application – an all-in-one patient engagement platform using Rails, Vue, PostgreSQL, and RSpec.
  • Managed the Rails upgrade process from version 4 to 7, delivering a seamless transition with no major regressions.
  • Collaborated with cross-functional teams to implement complex queries for research and reporting.
  • Mentored new team members, improving team knowledge and onboarding efficiency.
  • Conducted code maintenance and refactoring to optimise performance and scalability.
  • Liaised with third-party providers to manage integrations and synchronisation.
  • Delivered well-estimated software modules on time, aligned with business objectives.
  • rovided client support including report generation and integration issue resolution.
Employment Hero – Ho Chi Minh City, Vietnam

Full-Stack Developer (April 2020 – May 2023)

  • Developed and maintained security group settings within management modules using Rails, PostgreSQL, RSpec, ReactJS, and TypeScript.
  • Built document management systems to handle official employment records.
  • Integrated a third-party Learning Management System (Go1) using Sinatra, ReactJS, and PostgreSQL.
  • Designed monitoring tools to proactively detect and resolve integration issues.
  • Created services for complex management feature flows and legacy data migration.
  • Provided technical mentorship to junior developers and supported mobile design integration.
  • Contributed to the design and implementation of a seamless legacy data migration flow.
CyberLogitec – Ho Chi Minh City, Vietnam

Full-Stack Developer (Sept 2018 – Feb 2020)

  • Received 'Best Growth of the Year' award in 2018.
  • Implemented full-text search optimisations using Elasticsearch.
  • Built test suites from scratch to improve code coverage and QA processes.
  • Applied ReactJS and Redux to enhance the frontend user experience.
  • Developed SNIPE – a pricing support tool built with Rails and PostgreSQL.
  • Built ONE-chatbot using Node.js, Dialogflow, and Google Cloud Functions for customer support.
  • Delivered the BACS system – a containers and vessels management tool using Rails, React, Elasticsearch, and PostgreSQL.
  • Independently developed a website from concept to completion using Rails and React.

Personal Projects

DealHub

A web application displaying updated deals from Australian online stores, with a car insurance price comparison feature.

GitHub:https://github.com/dthtien/deal-hub-backend|Website:https://www.ozvfy.com/
  • Built with ReactJS and Rails for deal aggregation and car insurance comparison.
  • Implemented daily data scraping using Sidekiq and custom web crawlers
  • Designed Material Design-inspired UI and deployed frontend to Vercel.
  • Enabled car detail lookup via number plate input.
  • Configured CI/CD with GitHub Actions, Docker, Nginx, Puma.
  • Integrated APIs including Facebook Graph and Slack.

DWF

A distributed workflow runner using Sidekiq and Redis

GitHub:https://github.com/dthtien/wf|Website:https://rubygems.org/gems/dwf
  • Developed a distributed workflow runner using Sidekiq and Redis for efficient background processing.
  • Implemented comprehensive test suite with RSpec and CI/CD pipeline using GitHub Actions.
  • Published as RubyGem 'wf' with clear documentation, gaining significant community adoption.

TopLand

A real estate statistics application for Ho Chi Minh City, Vietnam

GitHub:https://github.com/dthtien/real_estate_researcher
  • Built a ReactJS/Redux/Rails real estate statistics app for Ho Chi Minh City.
  • Deployed API to Azure VPS using Capistrano and frontend to Heroku.
  • Implemented Material Design UI with daily data scraping via Sidekiq.
  • Configured CI/CD with CircleCI, Nginx, Puma, and Let's Encrypt.
  • Integrated Facebook Graph API, Google Analytics, Skylight, and Slack.

Education

Viet Nam National University HCMC - University Of Information Technology
Bachelor of Engineering (Software) (2014 - 2019)

Major: Information System

References