Gunbilegt Byambadorj, Database Engineer and Developer in Sydney, New South Wales, Australia
Gunbilegt Byambadorj

Database Engineer and Developer in Sydney, New South Wales, Australia

Member since February 8, 2022
Gunbilegt is a data engineer with 10+ years of industry experience in software, web, and database development. He specializes in building data warehouses, pipelines, and models using SQL, Python, C#, Spark, Hadoop, and .NET. Gunbilegt has worked in oil and gas, minerals and mining, telecommunications, CRM, and eCommerce. He is currently a Hadoop developer with Tata Consultancy Services, and his industry experience is backed by a master's degree in information technology.
Gunbilegt is now available for hire




Sydney, New South Wales, Australia



Preferred Environment

Spark, Hadoop, .NET

The most amazing...

...solution I delivered recently was fixing the root cause of frequent deadlocks in a billing system database for a telecom company.


  • Hadoop Developer

    2021 - PRESENT
    Tata Consultancy Services
    • Built a data pipeline that automated the load of analytics reports using Cloudera Hadoop distribution.
    • Migrated legacy reports to the data lake, which enabled self-service BI reporting.
    • Configured Cloudera to automate the pipeline process.
    Technologies: Hadoop, Cloudera, Data Pipelines, Data Lakes, BI Reporting, Data Engineering, Databases, Data Modeling
  • Data Operations Engineer

    2021 - 2021
    Abyss Solutions
    • Built a task management tool for the data tagging team using React, MongoDB, and FastAPI.
    • Reduced the onboarding process from one month to one week by documenting the data operations.
    • Performed ETL operations for data processing using AWS S3 and AWS Batch.
    Technologies: AWS, MongoDB, React, FastAPI, Python, Amazon S3 (AWS S3), AWS Batch, ETL, Data Engineering, Databases
  • Software Developer

    2018 - 2021
    Ernest Fleming Machinery & Equipment Pty Ltd
    • Built a business application that manages inquiries, quotations, invoices, purchases, and the inventory management process using .NET and Microsoft SQL Server.
    • Reduced quotation time from one hour to five minutes and improved business efficiency.
    • Built sales reports using the Metabase BI tool, making it easier to track sales goals.
    Technologies: C#.NET, PostgreSQL, Docker, Metabase, Serilog, Sentry, Microsoft SQL Server, .NET, Business Intelligence (BI), Databases, BI Reporting, Data Modeling
  • Data Quality Services Lead

    2017 - 2018
    Rio Tinto
    • Led a team of eight to improve SAP data quality globally across all business units.
    • Built an internal data pipeline using Python, Luigi, Postgres, AWS EC2 and S3, and Redshift.
    • Automated monthly manual jobs and reduced ETL duration from 24+ hours to less than six hours.
    • Reduced the weekly ETL process from 48+ hours to less than 12 hours.
    Technologies: SAP, BackOffice Cransoft, SQL, AWS, Redshift, Luigi, Python, Team Leadership, Data Pipelines, Amazon EC2 (Amazon Elastic Compute Cloud), ETL, Automation, Amazon S3 (AWS S3), Data, Databases, Data Engineering, Data Modeling
  • Analyst Report Developer

    2015 - 2017
    Rio Tinto
    • Developed reports using SAP Business Warehouse and BEx Query Designer.
    • Monitored ETL processes and ensured on-time completion of all the steps.
    • Won an award in 2015 for being the most supportive member of the year.
    Technologies: SAP BW, SQL Server 2016, SQL, BI Reporting, BEx Reporting, Data Queries, ETL, Databases, Data Modeling
  • Senior Software Developer

    2013 - 2014
    Unitel Group
    • Led the data warehouse project, introduced Oracle Data Integrator for ETL, and created data marts for reporting.
    • Spearheaded an initiative to build automated operational reporting and enable an ad hoc analytics system.
    • Integrated a convergent billing system with existing systems.
    • Revamped the legacy reseller system with AngularJS and PHP.
    Technologies: C#, PHP, Oracle, SQL, DevExpress, AngularJS, Automation, Data Warehousing, Oracle Data Integrator (ODI), ETL, Data Marts, BI Reporting, Leadership, Databases, Data Engineering, Data Modeling
  • Software Developer

    2011 - 2013
    Unitel Group
    • Developed business applications that managed business operations.
    • Developed modules for the call center ticket management system, CRM, and corporate relations.
    • Reduced the user acquisition cost by developing a CRM module to improve business efficiency.
    Technologies: C#, .NET, DevExpress, Oracle, SQL, Customer Relationship Management (CRM), Data Modeling


  • Scraping

    A web scraping project to scrape using Scrapy. For eCommerce, It can be used to create a report on competitors' pricing and stay competitive in the market. I built this as a personal project to gain experience with Scrapy.


  • Languages

    SQL, C#.NET, Python, C#, PHP
  • Storage

    Databases, MongoDB, PostgreSQL, Redshift, SQL Server 2016, Data Pipelines, Data Lakes, Amazon S3 (AWS S3), Microsoft SQL Server
  • Other

    Data Analytics, Data Modeling, Data Engineering, Big Data, Machine Learning, Deep Learning, AWS, FastAPI, Metabase, Serilog, SAP, SAP BW, DevExpress, Web Scraping, BI Reporting, Team Leadership, Data Queries, Data Warehousing, Data Marts, Leadership, Customer Relationship Management (CRM), Data
  • Frameworks

    .NET, Hadoop, Spark, AngularJS, Scrapy
  • Libraries/APIs

    React, Luigi
  • Tools

    Cloudera, Sentry, BackOffice Cransoft, AWS Batch, BEx Reporting
  • Paradigms

    Agile Project Management, ETL, Business Intelligence (BI), Automation
  • Platforms

    Docker, Oracle, Amazon EC2 (Amazon Elastic Compute Cloud), Oracle Data Integrator (ODI)


  • Master's Degree in Information Technology
    2018 - 2020
    The University of Sydney - Sydney, NSW, Australia
  • Bachelor's Degree in Computer Science
    2006 - 2010
    Dickinson State University - Dickinson, ND, USA

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