Open to opportunities

Lucas Dias

@lucasdias2

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Senior Android developer focused on scalable, data-driven apps and clean architecture.

Brazil

Message

What I'm looking for

I’m looking to build scalable Android apps with Clean Architecture, guided by data (A/B tests, analytics, alerting) and powered by AI-assisted workflows, while leading through mentorship and end-to-end ownership.

I’m a Senior Android Developer with 8+ years building large-scale consumer apps, currently at Busuu, a language-learning platform with 50M+ downloads. I help sustain a 99.9%+ crash-free rate while delivering end-to-end improvements guided by real outcomes.

My specialty is Clean Architecture, modularization, and legacy modernization. I was a core contributor to migrating a 10-year-old codebase to Kotlin, Jetpack Compose, and Coroutines, and I led refactoring from MVP/RxJava/Dagger toward MVVM, Clean Architecture, and Hilt while implementing the Domain and Data layers.

I also push for data-driven engineering and faster delivery through AI-assisted workflows. I helped define the Android team’s agentic AI workflows (Claude Code skills, hooks, and standards), increasing delivery velocity by up to 3x, and I use Amplitude/Optimizely to run A/B tests, set feature alerting, and validate decisions. I lead with ownership and mentorship—coaching developers from intern to mid level and taking responsibility for outcomes like reducing home screen load time from 8s to under 2s.

Experience

Work history, roles, and key accomplishments

Current

Senior Android Developer

Current

Busuu (Chegg)

Mar 2023 - Present (3 years 4 months)

Deliver key features across exercise, community, payments, and authentication while sustaining a 99.9%+ crash-free rate. Helped define the Android team’s agentic AI workflows and drive modernization of a legacy MVP/RxJava/Dagger architecture to MVVM, Clean Architecture, Coroutines, Jetpack Compose, and Hilt.

Kotlin Java Jetpack Compose Clean Architecture MVVM Coroutines Hilt MockK Claude Code Amplitude Optimizely

Mid Android Developer

Busuu (Chegg)

May 2021 - Mar 2023 (1 year 10 months)

Deliver key features across exercise, community, payments, and authentication while sustaining a 99.9%+ crash-free rate. Helped define reusable Claude Code skills/hooks and improve home screen load time from 8s to under 2s through profiling and architectural improvements.

Kotlin Java Jetpack Compose Clean Architecture MVVM Coroutines Hilt MockK Claude Code Amplitude Optimizely

Android Lead

Lofti

Feb 2021 - May 2021 (3 months)

Led a team of 3 Android developers building a greenfield real-estate product from zero. Established a scalable, test-driven modular architecture using Kotlin, Coroutines, Clean Architecture, Koin, MockK, and GitHub Actions CI/CD.

Kotlin Coroutines Clean Architecture Koin MockK GitHub Actions

Mid Android Developer

Warren

May 2020 - Nov 2020 (6 months)

Owned the home page of an investment platform, designing and developing core features. Led development of a custom server-driven UI library to build UIs programmatically.

Kotlin Java MVVM Coroutines Dagger Mockito

Mid Android Developer

Globo.com

Jun 2019 - May 2020 (11 months)

Built and maintained shared Android libraries powering flagship products, emphasizing decoupling and scalability. Launched three greenfield apps and contributed to the company’s flagship sports app.

Kotlin MVVM Clean Architecture Coroutines Koin MockK