ABOUT
About David Cruz Anaya | Senior Mobile Engineer
London-based independent senior mobile engineer, author, and Udemy instructor, building mobile software and writing about doing the work before you feel ready.
Hi, I'm David Cruz Anaya, a UK-based independent senior mobile engineer. I help companies modernise Android apps, adopt Kotlin Multiplatform, and add native Rust where it earns its place, and I still write the hard parts myself. Twelve years shipping apps used by millions sits behind that.
I also mentor Android and Kotlin developers one to one. As a Udemy instructor with over 20,000 students, I teach Android development, create tutorials on YouTube, and contribute to open source.
What I Do
Two ways to work with me, plus the courses, writing and talks around them
For companies
Android app modernisation, Kotlin Multiplatform adoption, native Rust modules where they fit, and embedded senior delivery for mobile teams.
View services →For professionals
One-to-one mentoring in Android and Kotlin, KMP guidance, code and architecture reviews, and career support for developers.
View mentoring →Courses & content
Udemy instructor with 20,000+ students, plus YouTube tutorials and open source, sharing Android, Kotlin and multiplatform knowledge.
Watch on YouTube →Writing & speaking
Author of 'You Are Not That Important', plus tech, mindset and mental-health talks for teams and conferences.
View talks →Skills & Technologies
Technologies and tools I work with daily
Mobile
- Android / Kotlin
- Jetpack Compose
- Kotlin Multiplatform
- iOS / Swift
- Flutter
- Android & Fire TV
Native & performance
- Rust (native mobile modules)
- C / C++ interop
- JNI
- Low-latency audio
- ExoPlayer / DRM
Web & backend
- Next.js
- React
- TypeScript
- Ktor
- REST / GraphQL
- PostgreSQL
- Supabase
Craft & delivery
- Clean Architecture
- MVVM / SOLID
- TDD & UI testing
- CI/CD · Fastlane
- Gradle · Docker
- Team leadership
CAREER
Career Highlights
12+ years across streaming and consumer apps, moving between building, leading and managing.
Independent Senior Mobile Engineer
davthecoder
Android modernisation, KMP adoption and native Rust for companies, plus mentoring.
Engineering Manager & KMP Team Lead
Sky · via Deltatre
Led a cross-functional mobile team shipping Sky Go to 10M+ users.
Lead & Android Engineer
Deltatre · Massive Interactive · IGT
Streaming & gaming apps for WWE, BritBox, My5 and playMGM.
FAQ
Frequently Asked Questions
Who is David Cruz Anaya?
David Cruz Anaya (davthecoder) is an independent senior mobile engineer and published author based in London, UK, with over 12 years of experience specialising in Android, Kotlin Multiplatform, and native Rust for mobile.
What does David Cruz Anaya do?
He works with companies on Android app modernisation, Kotlin Multiplatform adoption, native Rust modules, and senior mobile delivery; mentors Android and Kotlin developers; teaches on Udemy to 20,000+ students; and contributes to open source.
Can I hire David for company work or mentoring?
Yes to both. For companies, see the services page. For one-to-one mentoring, code reviews, and career support, see the mentoring page. He is also available for tech, mindset and mental-health talks.
What technologies does David specialise in?
Android (Kotlin, Jetpack Compose), Kotlin Multiplatform, native Rust modules for mobile, iOS and Flutter, plus web development with Next.js, React and TypeScript.
What is the book 'You Are Not That Important' about?
It is David's book about humility and starting before you feel ready: letting go of ego and perfectionism to do meaningful work and ship things that matter.
My Journey
A decade of building digital experiences
Arrived in the UK
Started with €230, no English, and no degree. Slept in a park. Worked at McDonald's. Became a high dependency ambulance crew member.
Self-taught developer
Taught myself to code on a second-hand laptop. Transitioned into software engineering, specialising in Android and Kotlin.
Today
Independent senior mobile engineer working with companies on Android, Kotlin Multiplatform and native Rust, published author of "You Are Not That Important", and Udemy instructor with 20,000+ students.