Francisco Rojas
Staff Software Engineer, Cash App Local at Block
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolFrancisco Rojas is a Staff Software Engineer with 16 years of experience building large-scale, consumer-facing systems from 0-to-1 products to platform services, currently leading Cash App Local at Block in San Francisco. He helped launch Cash App Investing and created core backend primitives that enabled features like fractional shares, Roundups, and instant money movement, while driving a migration from on-prem monoliths to cloud service architecture. A pragmatic technical leader and coach, he has a track record of enabling teams through frameworks and communities—core maintainer of the Misk Kotlin framework and founder of API and Golang communities at Square. His hands-on contributions span backend reliability, database schema validation, and payments integrations, including upgrades across multiple languages for Square Connect examples and improvements to Hibernate behavior in misk. Comfortable across Ruby, Java, Go, Kotlin and cloud services, he blends deep engineering craft with product-focused delivery and a history of fostering cross-functional standards. He often pairs practical engineering fixes with broader platform-level changes, quietly increasing developer productivity and system resilience.
16 years of coding experience
9 years of employment as a software developer
Ingeniero civil en Computación Computer Engineer Engineering Computer Science, Ingeniero civil en Computación Computer Engineer Engineering Computer Science at Universidad de TalcaInformatik Computer Science, Informatik Computer Science at Technische Universität Dresden
English, German, Spanish
Github Skills (22)
kotlin10
apim10
apiconnect10
ruby-rails10
square-connect10
rails10
php10
hibernate10
api10
web-development10
python9
microservices-application9
csharp9
dotnet-core9
sql9
Programming languages (14)
Github contributions (5)
cashapp/misk
Dec 2018 - Dec 2022
Microservice Kontainer
Role in this project:
Back-end Developer
Back-end DeveloperContributions:154 reviews, 57 commits, 89 PRs in 4 years
Contributions summary:Francisco primarily contributed to the `misk-hibernate` module, enhancing its functionality and reliability. They implemented features to allow configuration of Hibernate's `SHOW_SQL` and acceptance of nullable columns with default values in schema validation. They also fixed a schema validation issue and improved SQS queue attribute monitoring. These changes indicate a focus on improving database interaction and data integrity within the microservice framework.
dockermicroservicemicroservices
square/connect-api-examples
May 2017 - Nov 2017
Code samples demonstrating the functionality of the Square Connect API
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:27 commits, 15 PRs, 21 pushes in 5 months
Contributions summary:Francisco primarily upgraded multiple example applications to use the Square Connect v2.1 API, which involved updating code across various languages and frameworks, including Rails, PHP, Python, C#, and Ember.js. They fixed error logging in the Rails example and addressed issues where a location could not process payments. The user also added shipping country information to the checkout template and incorporated Apple Pay functionality into the Rails example, demonstrating a focus on both backend integration and frontend user experience.
squareapiapi-connectsquare-connect
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