National Taiwan Normal University

Software Engineer at Facebook

In the Scaled Compromise Detection team, we developed a global sentry system to detect malicious activities, including phishing, password spraying, session stealing, and scripted logins. This system safeguards Meta's users across various product lines. As a Senior IC, my responsibilities include:

* Leading end-to-end projects, from ideation and stakeholder alignment to feature design and implementation.
* Contributing to better engineering practices, leading to cost savings of half a million dollars through code optimization and reduced CPU usage.
* Providing proactive feedback to external teams, enhancing their product offerings.
* Firefight large-scale attacks on Meta’s product lines.
* Mentoring and guiding new team members.

Facebook

Senior Software Engineer

My role involves serving merchandise recommendations on web, mobile, and email platforms. Specifically, my responsibilities include:

* Collaborating with the algorithm team to integrate algorithmic models into the production environment.
* Designing and implementing a new system architecture for algorithmic models while ensuring low latency and handling a high number of requests per second.
* Ensuring platform stability and scalability to accommodate 15x traffic during peak periods, such as cyber week.
* Monitoring the entire recommender platform as part of a DevOps team.
* Mentoring junior engineers to support their professional growth.

Zalando SE

* Responsible for overseeing the daily activities of team members including task assignment, scheduling, and mentoring.
* Lead engineering team to accomplish code refactoring that reduces the response time by 25%.
* Lead QA team to build continuous integration for improving code quality.

Rakuten

Team Lead, Rakuten E-Commerce Shopper Gateway

* Develop an event-based architecture service using Java CompletableFuture and Play framework to handle 16,000 requests per second.
* Manage a Global E-Commerce platform with millions of products worldwide.
* Achieve 70% latency reduction with a Redis Cluster-based generic cache layer.
* Create a Nginx plugin for consistent-hash based sharding of upstream servers.

Software Engineer - Rakuten Ichiba Global EC API Group

* Build HTC Account platform in America, Europe and China regions which serve 40 million global users totally and provide authentication and authorization by various sign-in options such as Google, Facebook, Weibo, QQ or Email address.
* Build Push Notification Platform which enables integration services be able to send or broadcast push messages to Android and iOS devices across the board.
* Construct service monitoring system by logstash and elasticsearch.
* Maintain HTC Account client library in Android.

Principal Software Engineer

* Deliver successful production service that increases 10% protection rate of web threat in all Trend Micro product line.
* Build “Domains Reputation Repository” to store and index the Tera-Byte domain-IP information which enables blocking suspicious domains automatically.
* Familiar with Hadoop HBase and MapReduce framework.

Trend Micro

* Proficient in Driver development in radio interface layer (RIL) for both Android and Windows Mobile platforms.
* Expert on Windows® Mobile driver development in RIL for HTC product lines such as Palm Treo Pro, Sony Ericsson X1, Orange/HTC P6500, and HTC Touch Pro2.
* Architecture and implementation of the first HTC dual-standby mobile phone (T5399) in Windows® Mobile Radio Interface Layer (RIL), which contributed to creation of the first HTC standard RIL codebase for all following dual-standby mobile phone.

Charlie Chang