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Salvador Romero Gil

@salvadorromerogil

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I build scalable Android products with Kotlin, Jetpack Compose, and clean architecture.

Mexico

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What I'm looking for

I'm looking to build scalable, high-performance mobile products where I can apply Kotlin, Jetpack Compose, clean architecture, data-driven thinking, and AI-assisted development to improve feature delivery, reliability, and user experience.

I've delivered core Android features for Zillow Group's Rentals domain using Kotlin, Coroutines, and Clean Architecture. I also integrated Apollo GraphQL, Retrofit, Datadog, Anvil, and Tangle to improve infrastructure, dependency management, and network resilience.

At JÜSTO, I built and maintained e-commerce Android features serving thousands of daily active users with Jetpack Compose and Kotlin Coroutines. I designed offline-first caching with Room and GraphQL/Retrofit APIs, while integrating Segment, Braze, Firebase, and Instabug.

Previously at KAVAK, I developed operational Android apps for vehicle inspection and logistics workflows, using Kotlin, RxKotlin, Coroutines, Clean Architecture, MVVM, and Dagger. I've also led cross-platform web and mobile initiatives at Marketi Solutions, mentored junior engineers, and delivered custom Android apps as a freelancer.

I'm currently advancing my Data Science and Business Intelligence background through research on machine learning algorithms and Formula 1 telemetry data. I use LLMs, Claude Code, and OpenAI Codex to automate refactoring, test generation, and daily development workflows.

Experience

Work history, roles, and key accomplishments

Software Development Engineer (P3)

Zillow Group

Dec 2024 - Aug 2026 (1 year 8 months)

Architected and delivered core Android features within the Rentals domain using Kotlin, Coroutines, and Clean Architecture. Leveraged AI coding tools to automate code refactoring and test script generation, increasing feature velocity.

Kotlin Coroutines Clean Architecture Jetpack Compose Apollo GraphQL Retrofit Datadog Anvil Tangle Junit MockK Espresso Robolectric Paparazzi Figma AI Coding Tools Claude Code Codex

Software Engineer, Android

JÜSTO

Jan 2023 - Nov 2024 (1 year 10 months)

Built and maintained core e-commerce Android features serving thousands of daily active users using Jetpack Compose and Kotlin Coroutines. Integrated real-time analytics and monitoring pipelines using Segment, Braze, Firebase, and Instabug.

Jetpack Compose Coroutines Ktor Koin ROOM GraphQL Retrofit Segment Braze Firebase Instabug Offline First

Android Software Engineer

KAVAK

Jun 2021 - Nov 2022 (1 year 5 months)

Developed internal operational Android apps to streamline vehicle inspection and logistics workflows using Kotlin, RxKotlin, and Coroutines. Implemented real-time observability and crash tracking via Datadog and Firebase.

Kotlin Coroutines Clean Architecture MVVM Dagger Datadog Firebase

Android Developer

Freelancing

Jan 2018 - Dec 2021 (3 years 11 months)

Designed, built, and tested custom Android applications for various enterprise and retail clients using Kotlin Coroutines, SQLite/Room, and REST APIs. Provided comprehensive technical documentation and automated unit testing for all client deliverables.

Kotlin Coroutines SQLite ROOM REST APIs Junit Technical Documentation

Project Manager/ Web Developer

Marketi Solutions

Jan 2020 - Mar 2021 (1 year 2 months)

Led cross-platform development initiatives across Web and Mobile. Authored technical application architecture documents and designed database-to-frontend pipelines for client data processing.

Project Management Web Development Android Kotlin Python PHP Xamarin Agile

IT Advisory

VW Mexico

Dec 2016 - Jun 2018 (1 year 6 months)

Coordinated and led the technical development of smart mobility prototypes for the Mobility 2020s initiative. Built hardware-integrating Android prototypes leveraging Kotlin, Android SDK, and Bluetooth hardware sensors.

Kotlin Android SDK Bluetooth Hardware Integration Prototyping