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Hello, I’m

Seed Zeng

Software Engineer & Scalability Expert

View my CV
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About Me

"Talk is cheap. Show me the code"

- Linus Torvalds

Languages

programming languages

Python
C++
Java
JavaScript
SQL
LATEX

Frameworks

data processing & web frameworks

Flink
Django
Spark
Airflow
Beam
Angular

Databases

SQL/noSQL and in-memory databases

Cassandra
RocksDB
Redis
MySQL
DynamoDB
FoundationDB

Curriculum Vitae

My work experience and education background in a timeline fashion

Download My Resume

Tech Lead

  • Solving the challenging consistency problems of distributed systems at facebook scale.
  • More details to come.
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FacebookMay.2020 – Present
Boston, MA United States

I build systems to handle millions of requests per second to support the FB's family of apps.

Senior Software Engineer

  • Developed Abacus 2.0, a complete overhaul of Klaviyo’s ingestion model, read API and database schema. This new generation of streaming microservice is able to run 10 times faster than its predecessor.
  • Developed migration service to migrate 4 petabytes of data to the new schema.
  • Scaled the legcay event pipeline, of which the throughput was 500 events per second, to be able to handle 150,000 events per second (3 million database writes per second). This new system is not only able to handle 300x traffic but also can be readily scaled horizontally.
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KlaviyoMay.2019 – May.2020
Boston, MA United States

Klaviyo is a marketing platform that helps businesses own their marketing. I sit on the event team that is in charge of ingesting event payloads from various sources and process them in real time.

Software Engineer

  • Developed Abacus 1.0 using Apache Flink, a modern streaming micro service, to replace Klaviyo's legacy ingestion pipeline. Abacus processed 1.5 billion events smoothly on Cyber Monday alone.
  • Developed Klaviyo's first Kafka microservice, which is now handling billions of ingress/egress traffic everyday.
  • Maintained various core data stores including Mysql, Cassandra and caching layers including Redis, Memcache.
  • Refactored legacy ingestion pipeline code using a fully OOP design. The refactored pipeline is much more readable, reusable and extendable.
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KlaviyoMay.2017 – May.2019
Boston, MA United States

Klaviyo is a marketing platform that helps businesses own their marketing. I sit on the event team that is in charge of ingesting event payloads from various sources and process them in real time.

Software Engineer

  • Developed survey branching feature using React to allow next question within a survey smartly rendered based on user input/feedback.
  • Migrated infrastructure management suite from Boto2 to Boto3.
  • Facilitated migration from Postgres to non-relational DynamoDB.
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SMGMay.2016 – May.2017
Boston, MA United States

My team develops and maintains SMG's SurveyMini mobile app that has collected 25,585,863 survey responses from 142,257 active panelists as of 2016.

B.S in Computer Science

  • GPA: 3.97/4.0
  • Graduated with Summa Cum Laude honor, ranking 9 out of 500
  • Brown Fellowship with full scholarship
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Washington University2014 – 2016
St.Louis, MO United States

Yes, it's the better Washington University that is located at Saint Louis

B.A in Physics

  • Major GPA: 3.97/4.0
  • Dean's List
  • Good T.A Award
  • Graduated with Summa Cum Laude
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Denison University2011 – 2014
Granville, OH United States

Denison is a cute little liberal arts college located at Granville, Ohio. I spent 3 years there studying physics. It's easily one of the happiest few years in my life. I still remember the pure joy when I managed to derive Maxwell's Equations .

My Writing

Some of my blog posts on distributed systems and technology in general

My Podcast

Examine the world from multiple perspectives and learn to hold different views with Seed & Hansen

Life

"Reason is, and ought only to be the slave of the passions.”

― David Hume

Chinese food is superior

Yes. I said it. Chinese food is simply the best. This is 腰果鹅肝. Gongbao style Foie gras. I had this dish back in Chengdu and was blown away by the svaory of the taste and declicaicies of the texture.

Bamboo BBQ

Indeed, This dish does not look fancy first glance but it is both creative and tasty. I made this back in China in the suburbs (we made sure to be safe with fires). We put marinated meat and fresh veggie into the bamboo and bbq it. The refreshing fragrance of the bamboo is mixed into the meat during the BBQ. After 10 min, one can cut the bamboo and enjoy the dish.

3-star michelin Epicure

Yeah, I spent a few thousands dollars to expeirence the fancy 3-star french restaurant. Epicure @ Paris is the first 3-star michelin restaurant in the world. It's definitly an interesting experience. But I have to say, the food is .... ok.

Bluff Trail @ CA

This is the bluff trail near Santa Monica. I hiked there for 3 hours. Such a nice view.

Paris

I took this picture during a morning run at Paris.

Yosemite

Will defnitely go back to Yosemite in the future for my hikes!

Bad Blood

Still reading this book. Quite an interesting read so far.

城门开

城门开(The openning of the castle gate) is a book by Beidao. It documents the author's reflection on mordern society and change of Beijing. I enjoyed the book a lot.

秦观词选

他人之词,词才也。 少游之词, 词心也

Get In Touch

Like what you see here? I am more awesome in person.

Cambridge, MA, United States