William Phan Email & Phone Number

Jakarta, Indonesia

Indonesia

- Design migration plan for content services from Tokopedia GCP to Byte Cloud environment.

- Designed and developed an automated shop story creation system to handle high rates of events from message queues, generate content from a list of templates, and create trackers and reports for story engagement metrics.- Led cost optimization by downscaling servers horizontally or vertically based on usage rates, and changed the Redis cluster to Redis Sentinel to use the minimum number of servers.- Drafted a technical initiative list to address technical debt, increase observability coverage, conduct chaos testing, and improve API latency performance.- Conducted manpower planning for the next semester using ballpark figures for project estimation and product negotiation.- Chosen as mentee in the Talent Bench Program, aimed for the top 1% of performers at Tokopedia, receiving training, mentorship, and coaching sessions from the VP.- Volunteered to join Tokopedia Defender initiative to gain in-depth knowledge about cloud platforms and became the tribe champion responsible for addressing cloud platform tickets.

- Developed quizzes and games for sellers to enhance engagement and manage giveaways, scaling up to 5K write requests per second (RPS).- Scaled content creation to support up to 600 concurrent live streams by sellers, expanding from a single live stream maintained by the business operations team.- Designed and developed real-time notifications to prompt a toaster inside live rooms based on user interactions such as the number of users joining and the number of products being purchased or added to the cart, to create a FOMO effect.- Designed and developed the capability to distribute product information updates via WebSocket to users based on their location and the most beneficial product warehouse, supporting location-based products.- Acted as the lead for a team of 4 software engineers, handling cross-team collaboration, leading sprint ceremonies, and conducting one-on-one mentoring sessions to gather feedback and provide guidance.

Indonesia

- Developed APIs enabling live stream creation and viewing, handling up to 20K read requests per second (RPS) and serving up to 1 million concurrent users via WebSocket. Utilized Redis, in-memory caching, and singleflight to ensure optimal performance.- Engineered a slotting mechanism using PostgreSQL and Elasticsearch to recommend content based on product team-defined algorithms. Facilitated easy A/B testing by allowing mutation of queries from the API.- Created a content scheduling mechanism, enabling the business team to input shop schedules and enhance revenue generation from business deals.Implemented a worker design pattern to scale delivery of shop follower push notifications, supporting up to 500K followers for a single shop.- Orchestrated the migration of services from Kubernetes to GCP VM. Transitioned the previous content service to a new live stream service using a proxy layer, streamlining operations from double-write to a single-read phase.- Developed and maintained a robust affiliate product link queue generation system using Go, PostgreSQL, and NSQ. Ensured availability of linked products by monitoring stock levels.

Indonesia

I designed and developed an application to streamline the delivery process of KlikBCA tokens and key passes for company OTPs, replacing a manual file-based system prone to human error and inefficiency.For the backend, I utilized Java Spring Boot to create a robust application that allows users to input delivery notes, check proofs of delivery, and perform various delivery data queries and mutations.On the frontend, I developed an Android application using Android Studio. This app enhances the user experience by enabling automatic tracking of deliveries using map services, inputting proof of delivery, and providing additional features to improve accuracy and efficiency in the delivery process.The new system significantly reduces human error, improves processing speed, and provides real-time tracking and logging capabilities, ensuring more accurate and efficient delivery management.

Jakarta

- Taught coding practices to students according to the curriculum. Languages included C, C++, Java, C#, HTML, CSS, JavaScript, SQL Server, and more.- Created practical quizzes and exam questions based on the curriculum.- Conducted training sessions on new subjects for the upcoming curriculum.- Trained new laboratory assistants.- Assisted teachers during coding lectures.- Completed the Test Progressive Assistance program, tackling advanced coding tasks within set timeframes (e.g., Unity game creation, e-commerce system design and coding, code smells and design pattern implementation).- Conducted research projects, such as developing a full-stack booking application, to enable second-year assistants to explore topics in-depth.

Bachelor Of Computer Science, Computer Science, 3.94 Gpa

Graduate Summa Cum Laude Best graduade in Global Class Program

Exchange Student, Mobile System Engineering, 4.00 Gps

High School, Science