Adrian is available for hire
Hire AdrianAdrian Shum
Verified Expert in Engineering
Back-end Developer
Location
Hong Kong, Hong Kong
Toptal Member Since
April 29, 2022
Adrian is an enthusiastic technologist with over ten years of experience, including eight years specifically in building complex eCommerce systems. Adrian consistently aims to craft robust and functional solutions that drive innovation within organizations.
Portfolio
Goxip
Go, Elasticsearch, ELK (Elastic Stack), MySQL, Kubernetes, Apache Airflow...
MyMM
Node.js, AngularJS, Elasticsearch, Go, Docker, Redis, Microservices, MySQL...
Imagination
Node.js, AngularJS, Drupal 7, Redis, MySQL, REST, Elasticsearch, Docker, Go...
Experience
Availability
Part-time
Preferred Environment
Go
The most amazing...
...project I've created as a hobby is an online music widget website that reached six million daily page views and one million monthly active users (MAU).
Work Experience
System Architect
2018 - 2023
Goxip
- Built a system architecture that scales through 800 merchants, 12 million stock-keeping units (SKU), and 700,000 monthly active users on board.
- Revamped mission-critical API services from PHP to Go, resulting in 10-fold to 100-fold better response time and uptime.
- Handled Elasticsearch index, search relevancy, and cluster performance optimizations.
- Facilitated structured logging and analytics with Elasticsearch, Fluent Bit, and Kibana.
- Created product ranking algorithms based on multichannel sales and impressions data, which has increased Google Shopping ads' return on ad spend (ROAS) by over 200%.
- Facilitated ETL data pipelines with a customized Airflow for Kubernetes and revamped ETL scripts from PHP to Python and Panda.
- Reduced AWS cost by 60% using various cost-saving techniques, including spot instances, network optimizations, and Cloudflare integrations.
Technologies: Go, Elasticsearch, ELK (Elastic Stack), MySQL, Kubernetes, Apache Airflow, GraphQL, Nuxt.js, Vue, Docker, Redis, Microservices, gRPC, Python, Pandas, REST, RabbitMQ, REST APIs, Microservices Architecture, Domain-driven Design (DDD), JavaScript, RESTful Microservices, Test-driven Development (TDD), Solidity, Redis Cache, Cache API, Distributed Caches, SQL, MongoDB, Clean Architecture, TypeScript, Analytics, Google Analytics, ETL, Cloud Architecture, Amazon Web Services (AWS), Data Architecture, Software Development, Data Engineering, Data Analysis, Data Warehousing, Big Data, NoSQL, Back-end, Containerization, Software Architecture, HTML, CSS, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (Amazon SNS), AWS Lambda, Lambda Functions, APIs, CI/CD Pipelines, eCommerce APIs, Integration, Shopify API, eCommerce, Marketing
Platform Architect
2015 - 2018
MyMM
- Built the back-end architecture for an eCommerce platform in China, consisting of native apps, H5 WeChat, and web admin, featuring product, inventory, order, coupon, CMS, and social.
- Worked with back-end technologies: Node.js, ElasticSearch, MariaDB, Redis, RabbitMQ, and Kafka in developing the platform from scratch and its ongoing enhancements.
- Led the local and remote team, performing task management and code review.
- Integrated China payment gateway API Alipay and WeChat Pay.
Technologies: Node.js, AngularJS, Elasticsearch, Go, Docker, Redis, Microservices, MySQL, REST, RabbitMQ, REST APIs, RESTful Microservices, Microservices Architecture, JavaScript, Test-driven Development (TDD), ELK (Elastic Stack), Redis Cache, Cache API, SQL, Analytics, Web Analytics, Cloud Architecture, Software Development, Data Architecture, NoSQL, Back-end, Containerization, Software Architecture, HTML, CSS, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (Amazon SNS), Apache Kafka, APIs, CI/CD Pipelines, eCommerce APIs, eCommerce
Full-stack Developer
2014 - 2015
Imagination
- Filled various development roles focusing on Node.js, AngularJS, and Drupal 7.
- Built a replicable, decentralized CMS with Node.js, LevelDB, and Elasticsearch. Used as the back end on several digital projects, including GE Turkey.
- Contributed to developing several touchscreen directory software for shopping malls and car personalization, including Pacific Place and Lincoln China.
Technologies: Node.js, AngularJS, Drupal 7, Redis, MySQL, REST, Elasticsearch, Docker, Go, Microservices, REST APIs, JavaScript, RESTful Microservices, Redis Cache, Cache API, SQL, PostgreSQL, Analytics, Google Analytics, CRDT, Cloud Architecture, Amazon Web Services (AWS), Software Development, NoSQL, Back-end, HTML, CSS, APIs
Drupal Developer
2013 - 2014
Coconut Inc.
- Held various development roles focusing on Drupal 7.
- Developed New World Development, Chow Tai Fook, and Arch Education websites.
- Provided training to the client’s staff on content entry and site maintenance.
Technologies: Drupal 7, JavaScript, Redis, MySQL, REST, SQL, PostgreSQL, Analytics, Google Analytics, Amazon Web Services (AWS), Software Development, Back-end, HTML, CSS
Freelance Web Developer
2012 - 2012
WE-DESIGNS
- Developed websites of WE-DESIGNS and CUHK School of Architecture.
- Handled web development with Kohana PHP, jQuery, and Flickr API integrations.
- Assisted in the virtual private server (VPS) hosting, server deployment, and SEO.
Technologies: PHP, JavaScript, SQL, Software Development, HTML, CSS
Experience
Imagor
https://github.com/cshum/imagorImagor is a fast, Docker-ready image processing server written in Go. It uses one of the most efficient image processing libraries, libvips, and is typically four to eight times faster than the quickest ImageMagick and GraphicsMagick settings.
It is a highly optimized application for concurrent requests, ready to be installed and used in any Unix environment, and is also prepared to be containerized using Docker.
Imagor adopts the Thumbor URL syntax and covers most of the web image processing cases representing a lightweight, high-performance drop-in replacement.
It is a highly optimized application for concurrent requests, ready to be installed and used in any Unix environment, and is also prepared to be containerized using Docker.
Imagor adopts the Thumbor URL syntax and covers most of the web image processing cases representing a lightweight, high-performance drop-in replacement.
Goxip
Goxip is an online fashion, clothing, and beauty search engine and eCommerce platform with over five million SKUs.
I was responsible for building the backbone architecture in Go with Elasticsearch, including search relevancy and cluster performance optimizations. Alongside with product ranking algorithms based on multi-channel sales and impressions data written in Python and Pandas managed by Airflow.
I was responsible for building the backbone architecture in Go with Elasticsearch, including search relevancy and cluster performance optimizations. Alongside with product ranking algorithms based on multi-channel sales and impressions data written in Python and Pandas managed by Airflow.
NOMORECLUB Non-fungible Token (NFT)
https://nomoreclub.io/NOMORECLUB empowers creators by building a community as a create-to-earn stage. Holders can make a profit by co-creating NFTs and NOMORECLUB products.
In this project, I built the gas-saving solidity contract using ERC721A, signature-based whitelisting, a gas war reduction mechanism, and a secure Node.js back end.
In this project, I built the gas-saving solidity contract using ERC721A, signature-based whitelisting, a gas war reduction mechanism, and a secure Node.js back end.
GE Innovation Engine
The GE innovation engine is the ever-present brain within the GE Innovation Center. It is a dynamic online aggregator that visually represents what areas of innovation are trending globally. It allows visitors to connect and download countless academic resources such as the GE patent library, the Predix developer assets, stylus articles, and other academic journals.
I built the knowledge using Elasticsearch, powered by a replicable, decentralized CMS developed with Node.js and LevelDB.
I built the knowledge using Elasticsearch, powered by a replicable, decentralized CMS developed with Node.js and LevelDB.
Virtual Car Configurator for Lincoln China
Virtual car configurator visualized on a “true-to-scale” 4K video wall using 3D engineering models running on a content-managed cloud-based HTML5 platform, deployed across over 20 Lincoln dealerships across China.
I was responsible for developing the interactive interface with AngularJS and the vehicle configuration back end built in Node.js and LevelDB.
I was responsible for developing the interactive interface with AngularJS and the vehicle configuration back end built in Node.js and LevelDB.
New World Development Company Limited | Official Website
https://www.nwd.com.hk/I was responsible for the New World Development Company Limited's official website built with Drupal 7.
For this project, I laid out the foundations with Drupal 7, including content types, taxonomies, panels, views, workflows, and deployment strategy. I also supported the wide variety of corporate workflows and staff training for the company.
For this project, I laid out the foundations with Drupal 7, including content types, taxonomies, panels, views, workflows, and deployment strategy. I also supported the wide variety of corporate workflows and staff training for the company.
SCM Music Player
https://www.scmplayer.net/SCM Music Player is a free and open source web music player that brings a seamless music experience to your website.
The most popular online music widget during the Tumblr era. Peaked six million daily page views and one million MAU.
The most popular online music widget during the Tumblr era. Peaked six million daily page views and one million MAU.
Skills
Languages
Go, JavaScript, PHP, SQL, HTML, CSS, Python, GraphQL, TypeScript, Solidity
Frameworks
AngularJS, gRPC, Knockout (Knockout.js), Nuxt.js
Libraries/APIs
Node.js, REST APIs, Cache API, Pandas, Vue, React, Shopify API
Tools
ELK (Elastic Stack), Apache Airflow, RabbitMQ, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (Amazon SNS), Google Analytics
Paradigms
Microservices, REST, Microservices Architecture, Test-driven Development (TDD), Clean Architecture, ETL
Platforms
Drupal 7, Docker, Amazon Web Services (AWS), Kubernetes, Apache Kafka, AWS Lambda, Blockchain, Ethereum
Storage
Elasticsearch, MySQL, Redis, Redis Cache, PostgreSQL, MongoDB, NoSQL
Other
RESTful Microservices, Cloud Architecture, Data Architecture, Software Development, Back-end, Software Architecture, Containerization, APIs, CI/CD Pipelines, eCommerce, Domain-driven Design (DDD), Distributed Caches, Analytics, Web Analytics, libVIPS, Decentralization, Decentralized Systems, Decentralized Applications, Data Engineering, Data Analysis, Data Warehousing, Big Data, Non-fungible Tokens (NFT), Lambda Functions, eCommerce APIs, Integration, CRDT
Industry Expertise
Marketing
Education
2008 - 2012
Bachelor's Degree in Mathematics and Computer Science
Imperial College London - London, UK
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