Jesse Wilson
Programmer at Cash App
Kitchener, Ontario, Canada
Summary
🤩
Rockstar🎓
Top School
Top expert inAndroid and Kotlin Development
Jesse Wilson is a seasoned programmer with 22 years of experience building reliable, high-performance libraries and services, currently posting work at Cash App from Kitchener, Ontario. He has a strong history at Google working on core libraries like Guava, Guice, and Gson, and is a prolific open-source contributor across influential projects such as OkHttp, Retrofit, Picasso, and Gson. His contributions span low-level systems (Dalvik bytecode, dx), language migrations (Java-to-Kotlin), and performance-sensitive C image processing for Thumbor—demonstrating fluency across languages and runtimes. Jesse’s work often focuses on robustness: test automation, bug fixes in serialization, and careful refactors that improve API ergonomics and maintainability. Colleagues rely on him for tricky interoperability and serialization problems, as well as pragmatic improvements to developer tooling and code generation. Outside the obvious, he pairs deep systems expertise with a light touch—his public-facing "open source & jokes" summary hints at a developer who values both craftsmanship and culture.
22 years of coding experience
6 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at University of Waterloo
Github Skills (65)
image-processing10
annotations10
testing10
c1110
c1710
javas10
deserialization10
low-level-programming10
code-generation10
code-migration10
refactoring10
protocol-buffers10
data-serialization10
thumbor10
bilinear-interpolation10
Programming languages (16)
Github contributions (5)
cashapp/zipline
Aug 2015 - Jan 2023
Run Kotlin/JS libraries in Kotlin/JVM and Kotlin/Native programs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:592 reviews, 420 commits, 663 PRs in 7 years 6 months
Contributions summary:Jesse has primarily worked on core functionality within the project. Their commits focused on the underlying mechanics of integrating Kotlin/JS libraries into other Kotlin programs. This includes adding support for external libraries such as Duktape, encoding and decoding information between the two programs, refactoring the structure of the calls and making internal changes to the handling of Zipline and its functionalities. The user is also focused on improving the serialization mechanisms, by taking advantage of more of the API.
kotlin-jskotlinjvmprogramsjava
square/okio
Jul 2012 - Jan 2023
A modern I/O library for Android, Java, and Kotlin Multiplatform.
Role in this project:Backend Developer
Backend DeveloperContributions:452 reviews, 884 commits, 882 PRs in 10 years 7 months
Contributions summary:Jesse contributed to the core I/O library, okio, for Android, Java, and Kotlin Multiplatform. Their work focused on low-level implementations of functionalities like Buffers and FileHandles, including adding features for string handling, memory management, and random access capabilities. They also addressed bugs in internal code and added tests to ensure code correctness and performance.
java-androidkotlin-multiplatformandroidkotlinkotlin-android
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