Julius Arden, Front-end Developer in Sydney, New South Wales, Australia
Julius Arden

Front-end Developer in Sydney, New South Wales, Australia

Member since July 23, 2021
Julius is a front-end-biased software engineer and engineering manager with 5+ years of professional experience. He has worked in multiple sectors, including marketplace, edtech, and fintech, and in companies ranging from startups to multinationals. Julius leverages his varied experience to remain flexible and pragmatic while delivering and maintaining clean code.
Julius is now available for hire


  • Bukalapak
    React, Ruby, Java, SQL, PostgreSQL, Go, Apache Kafka, Flutter
  • tiket.com
    React, Jest, SonarQube, Java, Reactor, Spring, Redis, Engineering Management...
  • Forage
    JavaScript, Meteor, Node.js, React, Lambda Architecture...



Sydney, New South Wales, Australia



Preferred Environment

Git, OS X, Visual Studio Code (VS Code)

The most amazing...

...thing I've developed was a flexible querying system that allowed users to submit self-service queries in a sharded MongoDB cluster.


  • Senior Engineering Manager

    2021 - PRESENT
    • Reorganized team to have a higher velocity to meet business expectations with fewer quality defects.
    • Introduced Flutter to the apps engineers to start importing inside the native apps.
    • Moved some of the legacy front end from Vue to React.
    Technologies: React, Ruby, Java, SQL, PostgreSQL, Go, Apache Kafka, Flutter
  • Engineering Manager

    2020 - 2021
    • Proposed and led architectural changes that fit new product requirements while balancing scalability, cost, and development velocity.
    • Managed the engineering team and coordinated marketing, business, and other stakeholders to release new products in a timely manner.
    • Mentored team members and suggested codebase improvements to reduce technical debts.
    Technologies: React, Jest, SonarQube, Java, Reactor, Spring, Redis, Engineering Management, Node.js, MongoDB, SQL, MongoDB Atlas, Git, OS X, Visual Studio Code (VS Code), JavaScript, RxJS, PHP, MySQL
  • Senior Software Engineer

    2018 - 2020
    • Architected a database infrastructure using zone-based sharding in MongoDB while maintaining application performance.
    • Led a front-end migration from a legacy framework to React with design systems using Storybook.
    • Built a data pipeline and ETL for analytics, using AWS Glue to make it queryable in Tableau for self-service business intelligence.
    • Established and grew the engineering function from two interns to two teams.
    Technologies: JavaScript, Meteor, Node.js, React, Lambda Architecture, Content Delivery Networks (CDN), MongoDB Atlas, AWS Lambda, Data Pipelines, MongoDB, Sharding, ETL, AWS Glue, Engineering Management, WebSockets, SQL, Git, OS X, Visual Studio Code (VS Code), RxJS, A/B Testing, Email Systems, MySQL
  • Software Engineer | Team Lead

    2017 - 2018
    Online Freelance Company
    • Integrated and improved the internal A/B testing framework and used it heavily for new feature releases.
    • Created SEO pages and managed technical ad targeting.
    • Managed the email system to maintain a high send rate and low bounce rate and improved the email tracking system.
    Technologies: Angular, TypeScript, AngularJS, PHP, Go, Redis, Elasticsearch, A/B Testing, Email Systems, Node.js, WebSockets, SQL, MongoDB Atlas, Git, OS X, Visual Studio Code (VS Code), JavaScript, RxJS, MongoDB, MySQL
  • Software Engineer

    2016 - 2017
    Approach Solutions
    • Developed an ERP solution using SAP HANA, SAPUI5, and OData.
    • Implemented a data management system for historical data.
    • Assisted with user onboarding and troubleshot user issues.
    Technologies: SAP HANA, SAPUI5, OData, Enterprise Resource Planning (ERP), Git, OS X, Visual Studio Code (VS Code), JavaScript
  • Business Operations Technical Graduate

    2016 - 2016
    • Moved and rebuilt the data center for internal IBM development labs.
    • Created and operated a server backup strategy using tape libraries for short-term and long-term storage.
    • Developed the initial version of a self-service system to spin up virtual infrastructure on-demand.
    Technologies: Cloud, Data Center Migration, BladeCenter H, SQL, Git, OS X, Visual Studio Code (VS Code)


  • Data Sharding Within One Cluster

    The back-end system of Forage allows data to be regionally stored while also supporting querying across regions. I led the creation of this system, which uses MongoDB Atlas while maintaining app performance by adding cache and a broadcast layer in Redis and reducing unnecessary WebSocket events with Meteor. The system can handle 10,000+ live WebSocket connections with 300,000+ monthly active users. It is also GDPR-compliant without the need to export user information to different regions.

  • Full-stack MERN React/Node.js Engineering Lead

    A pet insurance company launching its new product. I was initially hired as React developer to create the design system and initial pages but was involved in creating and managing the CI/CD. Due to resourcing issue in the back-end development (Node.js/TypeScript), I was moved to lead the back-end development as well.


  • Languages

    JavaScript, SQL, TypeScript, PHP, VHDL, Java, Go, GraphQL, Ruby
  • Libraries/APIs

    React, Node.js, RxJS, REST APIs, Reactor
  • Tools

    Git, MongoDB Atlas, SonarQube, SAPUI5, AWS Glue
  • Platforms

    OS X, Visual Studio Code (VS Code), Meteor, AWS Lambda, Raspberry Pi, SAP HANA, Netlify, Contentful, Apache Kafka
  • Storage

    MySQL, MongoDB, PostgreSQL, Data Pipelines, Redis, Elasticsearch
  • Other

    Engineering Management, Sharding, A/B Testing, Email Systems, WebSockets, Indexing, Data Aggregation, Machine Learning, Data Warehousing, FPGA, Microcontrollers, Content Delivery Networks (CDN), OData, Enterprise Resource Planning (ERP), Programming, Cloud, Data Center Migration, BladeCenter H, Gatsby
  • Frameworks

    Angular, Redux, AngularJS, Flutter, Jest, Spring, .NET 4, ASP.NET MVC, ADO.NET, Next.js
  • Paradigms

    Lambda Architecture, ETL, REST, Jamstack


  • Bachelor's Degree in Computer Engineering
    2012 - 2015
    University of New South Wales - Sydney, Australia
  • Diploma of IT in Programming in Information Technology
    2010 - 2011
    Sydney Institute TAFE - Sydney, Australia

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