Derek Wu
Verified Expert in Engineering
Full-stack Developer
Vancouver, BC, Canada
Toptal member since November 19, 2021
Derek is a well-versed developer with over five years of extensive development experience in front-end, back-end, and database development. He's a team player keen to focus on communications and always tries to convey thoughts and ideas concisely and accurately while getting feedback from others to improve the work overall.
Portfolio
Experience
- Software Deployment - 8 years
- React - 6 years
- TypeScript - 6 years
- Azure - 5 years
- Webpack - 5 years
- C# - 5 years
- Java - 5 years
- Redux - 5 years
Preferred Environment
Visual Studio, Visual Studio Code (VS Code), IntelliJ IDEA
The most amazing...
...thing I've designed and developed was a storage-based UX deployment method that reduced the duration of UX deployment from a couple of hours to minutes.
Work Experience
Senior Software Development Engineer
Zillow
- Designed and developed an automated testing framework using Kubernetes Jobs, a containerized technology adopted by multiple teams within Zillow, saving 90% of QA engineer time by eliminating the need to run tests locally after each deployment to QA.
- Converted a mission-critical app from monolithic to microservices architecture supported via Amazon Elastic Kubernetes Service and various other technologies, resulting in a 30% reduction in operating costs and a 50% decrease in deployment time.
- Designed and developed a service for customers to store notes about specific properties. It comprises layers of RESTful and GraphQL APIs that apps and websites consume.
- Built a data pipeline using Kinesis and Flink to ingest Zillow Home Loans’ user profile data from DynamoDB CDC events (5MB per second) into a centralized data lake with sub-second latency, including backfilling millions of historical records.
- Migrated from existing Airflow jobs to an architecture using Kinesis, Data Firehose, S3, and Databricks Delta tables to collect DynamoDB CDC events related to users’ saved homes.
- Migrated from existing Airflow jobs to running Spark jobs in Databricks and built a framework to test PySpark jobs locally with fixture data, accelerating development without requiring deployments to Databricks and reducing overall runtime by 20%.
Software Development Engineer 2
Amazon.com
- Worked on a diagnostic service built on AWS CloudFormation custom resource, S3, and DynamoDB to monitor the health of AWS Lambda based on approaches of applying a rule-based engine and ML algorithms.
- Contributed to the full-stack development of a website that supports Amazon sellers' business and manages goods import/export.
- Served as a full-stack developer and built a website that supports podcasters in uploading podcasts and episodes for end users to consume.
Integration Developer
ContractPod Technologies Limited
- Worked on the front and back end for a SaaS product company using Vue.js and .NET to implement a popup page for displaying items in different web drives, such as Google Drive, One Drive, and Dropbox.
- Prototyped a service that synchronizes data between an SQL database and third-party service using Azure Functions and Azure Service Bus.
- Tracked and fixed bugs by using Jira and other tools.
Software Engineer II
Microsoft
- Performed full-stack development, including front end, back end, and data pipeline) for the Microsoft 365 apps admin center at Office Experience Group (OXO).
- Developed various pages and common components, including home page, multi-level navigation bar, and breadcrumb navigation based on designs presented in Figma.com from UX designers by using React, Redux, and open-source frameworks and packages.
- Designed and implemented various services and public RESTful APIs by applying the microservices paradigm and utilizing Service Fabric, similar to one of the container technologies, to help services hosted on Azure.
- Designed and implemented the tenant association key, which powers millions of devices, managed by admins from Fortune 500 companies, onboarding to the Microsoft 365 Apps admin center.
- Set up data pipelines to ingest office release data daily using Cosmos, Azure Data Factory, and Azure Data Lake, which provides downstream services with the up-to-date aggerated data. It is consumed via other services and UX through UX RESTful APIs.
- Conducted platform development, including back end, database, build infrastructure, and compiler for Dynamics 365 Business Central.
- Implemented the load tests and various E2E tests by utilizing xUnit and Fluent Assertions frameworks to validate the system functionality through Azure.
- Acted as a key contributor to V2 extension’s database synchronization engine and data upgrade workflow, keeping schema and data consistency between upgrading from different extension versions.
- Designed and implemented the conversion engine for converting customers’ page customizations of Dynamics 365 Business Central from V1 XML delta to V2 customized syntax by utilizing Roslyn compiler code analysis APIs.
Experience
Microsoft 365 Apps Admin Center
https://config.office.comEducation
Bachelor's Degree in Computer Science
South Dakota School of Mines and Technology - Rapid City, SD, USA
Skills
Libraries/APIs
React, Azure Blob Storage API, Node.js, REST APIs, OpenID
Tools
Visual Studio, Azure Key Vault, AWS CloudFormation, Terraform, Amazon EKS, IntelliJ IDEA, Webpack, Autofac, Azure Application Gateway, xUnit.net, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (SNS), AWS CodeDeploy, Amazon CloudWatch, Amazon Elastic Container Service (ECS), AWS Step Functions, GitLab, Splunk, Apache Airflow, Flink
Languages
C#, TypeScript, Java, GraphQL, CSS, HTML, SQL, HTML5, Sass
Frameworks
Redux, ASP.NET, ASP.NET Core, .NET Core, Spring Boot, Jest, ADO.NET, Google Guice, .NET
Platforms
Visual Studio Code (VS Code), Azure Service Fabric, Kubernetes, Azure, AWS Lambda, Amazon Web Services (AWS), Azure Functions, Amazon EC2, Docker, Apache Kafka, Apache Flink, Databricks, Confluent Kafka
Storage
Datadog, Redis Cache, Azure SQL, Amazon DynamoDB, Azure Cosmos DB, Azure Queue Storage, Amazon S3 (AWS S3)
Paradigms
Microservices, DevOps
Other
Software Deployment, Azure Service Bus, Full-stack Development, Distributed Systems, Enzyme, AWS Cloud Architecture, Full-stack, Machine Learning, Azure Data Lake, Azure Data Factory (ADF), RESTful Microservices, Software as a Service (SaaS), OAuth, Apollo
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