# Alvin Feng

> Staff Software Engineer at Block

Location: San Jose, California, United States
Profile: https://flows.cv/alvinfeng

https://github.com/AlvinFeng

## Work Experience
### Staff Software Engineer @ Block
Jan 2021 – Present | San Francisco Bay Area
Helped launch new products in the Banking org, providing small business loans to Square sellers. Owned a money movement platform responsible for tens of millions of $ daily.

### Senior Software Engineer @ LinkedIn
Jan 2018 – Jan 2021 | San Francisco Bay Area, California
Lead the Cost-to-Serve team to build tooling to provide intelligent insights about software costs (covering $400 million annually). Developed a data platform using Python, MySQL, and Spark to process petabytes of data to drive an initial cost savings of $6 million annually.

### Software Development Engineer @ Yahoo! Inc.
Jan 2014 – Jan 2018 | San Francisco Bay Area
Lead a small team focused on bringing container based platforms and services to Yahoo. As lead engineer and designer, created tooling to support one of the largest private Docker registries in the world, housing more than 100 TB of images and serving over 150 TB throughput to global data centers each day. Created a platform for all Yahoo developers to build new Docker images, allowing for continuous delivery from more than 35 thousand builds per day.

Focused on the security of Yahoo container infrastructure by designing and implementing micro services to sign and authorize Docker images. Pioneered the effort to move away from legacy Yahoo technology to a cloud based AWS and Kubernetes stack.

Contributed to open source projects including the official docker registry. Provided bug fixes to multiple projects, and one major module to the docker registry to support external caches of image layers. This caching module reduced infrastructure costs at Yahoo by 98% from a hundred thousand dollars per month to a few thousand.

Mentored many new members to the team, including eight interns over the past three years. Drove the culture of the team to empower new developers early in their careers.

### Software Engineering Intern @ Yahoo! Inc.
Jan 2013 – Jan 2013 | Sunnyvale, California
Integrated and improved a free open source software for code review used daily by over a thousand Yahoo developers. Emphasis and effort was put towards writing maintainable code using test driven development with both Perl and Python.

Part of a small group that made it to the final round of Yahoo's internal, global hackathon. Developed a web-based game incorporating Flickr and Google Maps APIs over twelve hours. Presented final hack on broadcast and to a panel of judges including Yahoo VPs.

### Public Relations Officer @ Korean American Student Association
Jan 2012 – Jan 2013
Planned and organized new member recruitment drive of Fall 2012. Responsibilities include public speaking at meetings and coordinating social outing events.

### IT Intern @ W2 Optronics
Jan 2011 – Jan 2011
Set up and maintained Linux server to automatically backup and simplify data sharing between workstations. Responsibilities included troubleshooting network problems and repairing damaged machines.


## Education
### Bachelor of Science in Computer Engineering
California Polytechnic State University


## Contact & Social
- LinkedIn: https://linkedin.com/in/alvinfeng

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Source: https://flows.cv/alvinfeng
JSON Resume: https://flows.cv/alvinfeng/resume.json
Last updated: 2026-04-12