Jin Peng
Member Of Technical Staff at Letta
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJin Peng is a backend-focused software engineer with 10 years of experience building reliable, data-oriented systems across startups and large tech companies in the Bay Area. He has shipped production services at Facebook and Clockwise and now contributes as a Member of Technical Staff at Letta, bringing deep expertise in Python, FastAPI, ORMs, and database migrations. An active open-source maintainer, Jin has strengthened projects used across the ecosystem—improving caching for FastAPI, enhancing Tortoise ORM query capabilities, and hardening the StarRocks plugin for Apache DevLake. He’s skilled at bridging application logic and storage concerns, from implementing F-expression updates and complex SQL patterns to adding temporary-table and type-conversion support for large-scale ingestion. Known for pragmatic, readable code ("Life is hard, code is simple"), he often focuses on small infrastructure improvements that yield outsized stability and performance gains. Based in San Francisco, he combines product-facing engineering experience with a consistent track record of OSS contributions that improve developer ergonomics.
10 years of coding experience
6 years of employment as a software developer
Mission San Jose High SchoolBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at Columbia University
English, Chinese
Github Skills (32)
database-migrations10
caching10
fastapi10
dashboard10
admin10
back-end-development10
redis10
python10
starrocks10
go10
orm10
sql10
database-design10
database-migration10
backend10
Programming languages (18)
Github contributions (5)
long2ice/fastapi-cache
Aug 2020 - Jan 2023
fastapi-cache is a tool to cache fastapi response and function result, with backends support redis and memcached.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 releases, 6 reviews, 74 commits in 2 years 5 months
Contributions summary:Jin primarily contributed to the `fastapi-cache` project by implementing caching functionalities and integrating various backends. They added in-memory support, including the necessary classes and methods. Furthermore, the user introduced features like default configurations and enhanced the JSON encoder. They also added a clear method for clearing cache entries.
redispythonredis-streamsbackendsfastapi
tortoise/aerich
May 2020 - Dec 2022
A database migrations tool for TortoiseORM, ready to production.
Role in this project:Back-end Developer
Back-end DeveloperContributions:36 releases, 16 reviews, 252 commits in 2 years 7 months
Contributions summary:Jin primarily contributed to the `aerich` project, a database migrations tool for TortoiseORM. Their commits focused on implementing features related to database migrations, including adding and modifying database schema definitions, support for indexes, adding foreign keys and dropping columns. They developed and tested the core functionality of the migration tool.
tortoise-ormmysqlsqldatabase-migrationsdatabase
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.