Daniel Santiago

Puerto Rico, United States

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Summary

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Rockstar

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Top School

Daniel Santiago is an experienced Android and backend engineer with 13 years building robust mobile and native database systems from Puerto Rico. He has contributed to high-profile open-source projects like Dagger and AndroidX, enhancing Kotlin interoperability for dependency injection and implementing low-level KMP SQLite APIs and native drivers. Comfortable across the stack, he focuses on performance, memory footprint, and reliable connection management while making production-grade improvements to core libraries. His work shows a deep comfort with JNI/C++ boundaries and Kotlin metadata, a less obvious blend that helps bridge platform-native code with modern Kotlin patterns. He holds a BS from the University of Puerto Rico-Mayagüez and brings steady, long-term engineering craftsmanship to complex systems.

14 years of coding experience

Bachelor of Science - BS, Bachelor of Science - BS at University of Puerto Rico-Mayaguez

Spanish, English

Github Skills (16)

annotation-processing10

kotlin10

javas10

sqlite10

database-design10

dependency-injection10

java10

annotations10

testing9

bytecode-manipulation9

gradlew9

gradle9

jna9

c-language8

database-management8

Programming languages (6)

JavaStarlarkANTLRJavaScriptGroovyKotlin

Github contributions (5)

google/dagger

Sep 2019 - Sep 2022

A fast dependency injector for Android and Java.

Role in this project:

Back-end Developer

Contributions:1 release, 5 reviews, 132 commits in 3 years 1 month

Contributions summary:Daniel primarily focused on enhancing the Dagger dependency injection framework, specifically targeting Kotlin properties and module bindings. Their contributions involved modifying the code to understand and handle `@Qualified` annotations in Kotlin properties, enabling proper injection. Furthermore, they worked on enabling support for module bindings defined in Kotlin Objects, allowing for static provision methods, and improving memory footprint and code quality by leveraging Kotlin's metadata visitor API.

androidjava

androidx/androidx

Apr 2019 - Jan 2023

Development environment for Android Jetpack extension libraries under the androidx namespace. Synchronized with Android Jetpack's primary development branch on AOSP.

Role in this project:

Back-end Developer & Database Engineer/Administrator

Contributions:77 reviews, 376 commits, 107 comments in 3 years 10 months

Contributions summary:Daniel contributed to low-level KMP SQLite APIs, including the creation of a thin abstraction layer for SQLite3 C/C++ APIs and the implementation of a native driver for various operating systems. They also updated code to account for zero-terminated characters. The contributions focused on building and maintaining core database functionalities and also included contributions towards testing and validation of those. They also added features related to connection management and configuration.

android-jetpackandroidxandroidjetpack

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