Jimmy Chang

Jimmy Chang Email and Phone Number

Software Engineer & Performance Enhancement @Sizztech | System Design @ Sizztech
fortitude valley, queensland, australia
Jimmy Chang's Location
Westlake, Queensland, Australia, Australia
About Jimmy Chang

Hi, I'm Jimmy. It's a pleasure to meet you!My Carrer Overview:- 4+ years of experience as a C# .NET developer | 2+ years of experience in Python, Power BI, and DevOps.- Proficient in web and applications development, system analysis, databases designing, data analytics and visualisation, and solution providing.- Excellent communication and interpersonal skills, experienced in collaborating on large-scale projects involving over 100+ people.- Writing high-quality code to deliver maintainable and reliable programs that function seamlessly within the system, catering to over 1 million daily active users.

Jimmy Chang's Current Company Details
Sizztech

Sizztech

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Software Engineer & Performance Enhancement @Sizztech | System Design
fortitude valley, queensland, australia
Website:
sizztech.com
Employees:
7
Jimmy Chang Work Experience Details
  • Sizztech
    Software Developer
    Sizztech Jul 2024 - Present
    Brisbane, Queensland, Australia
    Helping local council, state government & government organisations & predict the future cities.
  • Xuenn Private Limited
    Software Engineer
    Xuenn Private Limited Apr 2023 - Mar 2024
    Taipei City, Taiwan
    - Designed a coordination mechanism to prevent deadlock conflicts during service auto-scaling. Implemented a monitoring system, alert system, and dashboard to enhance reliability and maintainability, leading to a 30% reduction in IT support working time.- Implemented SDKs such as Redlock, MongoDB, and Google Analytics 4, enhancing internal development efficiency and code reusability.- Utilised bulk/batch operations, Common Table Expressions (CTEs), partitioning, and indexing to refactor… Show more - Designed a coordination mechanism to prevent deadlock conflicts during service auto-scaling. Implemented a monitoring system, alert system, and dashboard to enhance reliability and maintainability, leading to a 30% reduction in IT support working time.- Implemented SDKs such as Redlock, MongoDB, and Google Analytics 4, enhancing internal development efficiency and code reusability.- Utilised bulk/batch operations, Common Table Expressions (CTEs), partitioning, and indexing to refactor and tune the PL/SQL procedure, resulting in a performance improvement of over 300%.- Built the mTLS protocol, certificate cache factory, and monitoring system, resulting in a 30% reduction in IT support workload.- Transitioned from a monolithic design to a microservices architecture using .NET 6 and MediatR to implement a RESTful API based on the Mediator design pattern. Show less
  • 91App, Inc.
    Software Engineer
    91App, Inc. Feb 2022 - Apr 2023
    Taipei City, Taiwan
    - Constructed an automated integration testing pipeline using GitLab CI/CD, Cypress, Docker, and Shell Script to enhance system reliability and streamline QA efforts by about 750%.- Built ReCAPTCHA features that enable IT Support to activate it within our SAAS platform. Included site key validation, retry mechanism, caching, and circuit breaker feature, resulting in a 15% reduction in fees and enhanced reliability when using Google reCAPTCHA.- Integrated OAuth, Bloom filter, Redis, and… Show more - Constructed an automated integration testing pipeline using GitLab CI/CD, Cypress, Docker, and Shell Script to enhance system reliability and streamline QA efforts by about 750%.- Built ReCAPTCHA features that enable IT Support to activate it within our SAAS platform. Included site key validation, retry mechanism, caching, and circuit breaker feature, resulting in a 15% reduction in fees and enhanced reliability when using Google reCAPTCHA.- Integrated OAuth, Bloom filter, Redis, and CDN to build the coupon distribution system, leading to a 20% increase in member account bindings via OAuth.- Optimized LINQ and T-SQL procedures by optimizing queries, designing appropriate indexing, using temporary tables, and implementing data housekeeping strategies.- Employed skills in Angular.js, JavaScript, and TypeScript to develop features for the SAAS platform. Provided users with a CMS interface for quick analysis, marketing, and designing official websites. Show less
  • Metro Taipei
    Software Engineer
    Metro Taipei Feb 2020 - Feb 2022
    - Constructed a data pipeline using C# Console, SSIS, PowerShell, and Python, capable of processing millions of raw data per hour. Built data warehousing to provide valuable data for other data analysts, resulting in a 30% improvement in their working time.- Served as a company tutor for various information skills, including Power BI, Python, C#, and MSSQL.- Developed an Excel report generator offering various analysis modes for generating Excel reports, resulting in a 200% reduction in… Show more - Constructed a data pipeline using C# Console, SSIS, PowerShell, and Python, capable of processing millions of raw data per hour. Built data warehousing to provide valuable data for other data analysts, resulting in a 30% improvement in their working time.- Served as a company tutor for various information skills, including Power BI, Python, C#, and MSSQL.- Developed an Excel report generator offering various analysis modes for generating Excel reports, resulting in a 200% reduction in workload time for non-technical coworkers.- Led to implement a train loading analysis module, increasing the train digestion rate by 15%.- Launched multiple data analysis modules for implementation across websites, desktop applications, and Power BI. These modules facilitated efficiency enhancements for the Operating Control Center in monitoring train operations and equipment availability. Show less
  • Galaxy Software Services
    Software Engineer Intern
    Galaxy Software Services Aug 2019 - Jan 2020

Jimmy Chang Education Details

Frequently Asked Questions about Jimmy Chang

What company does Jimmy Chang work for?

Jimmy Chang works for Sizztech

What is Jimmy Chang's role at the current company?

Jimmy Chang's current role is Software Engineer & Performance Enhancement @Sizztech | System Design.

What schools did Jimmy Chang attend?

Jimmy Chang attended National Taipei University Of Business.

Who are Jimmy Chang's colleagues?

Jimmy Chang's colleagues are Ryan Tongs, Bradley Rasmussen, Alessandra Santos, Steve Hun.

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