Modernise Android
Kotlin, Jetpack Compose, modular architecture, testing, delivery pipelines, and incremental change inside live products.
- Kotlin
- Jetpack Compose
- Architecture
- Testing
Senior mobile delivery and applied AI, both for hire.
I help product teams modernise Android, adopt Kotlin Multiplatform, and ship contained AI features with senior hands-on delivery. Mobile and applied AI are both hireable tracks, not a rebrand away from either.
Over a decade shipping production mobile products used by millions across Sky, BetMGM, WWE and BritBox. Applied AI evidence from independent products: Paglipat’s production concierge, the live chat on this site, and a contained ElTarot reading feature.
Three capability groups for freelance work
The detailed technology inventory belongs in the CV. These are the commercial tracks I take on.
Adopt Kotlin Multiplatform
Share the stable domain and data layers while Android and iOS keep native integration, UX, and platform ownership.
- KMP
- Android
- iOS / Swift
- Native boundaries
Ship applied AI product features
Contained assistants and generation features with grounding, guardrails, cost control, and tests. Evidence from independent products, not invented client AI work.
- Tool calling
- Workers
- Guardrails
- Evaluation
The useful context behind the CV
I arrived in the UK with little money, no English, and no degree. I worked at McDonald's and later in ambulance care before teaching myself software development on a second-hand laptop.
That route shaped how I work: reduce ambiguity, learn the system, help the people around me, and leave something maintainable. My career moved through IGT, Massive Interactive, Deltatre, Sky, and Deliveroo across hands-on engineering, technical leadership, and people management.
Outside company work, I wrote You Are Not That Important, teach Android courses to 20,000+ students, mentor working developers, and maintain independent products and open source.
I am also studying machine learning in public. That journal is deliberately labelled as learning, not as an established professional capability.
Company work is the primary route
Based in London, remote-friendly, and open to focused senior mobile engagements. Mentoring remains available separately for individual developers.
Common questions
Who is David Cruz Anaya?
David Cruz Anaya, also known as davthecoder, is a London-based senior mobile and applied AI engineer. He freelances on Android modernisation, Kotlin Multiplatform, and production AI product features.
What kind of work can I hire David for?
Company work includes Android app modernisation, incremental KMP adoption, embedded senior delivery, native or Rust performance work, and applied AI product features. Mentoring is a separate route for individual developers.
Is machine learning a professional service?
The ML Journal is a learning log, not model training or MLOps as a service. Applied AI for hire means contained product features (assistants, tool calling, guardrails, cost control) with independent product evidence such as Paglipat and this site’s chat.