Hi, my name is

Boris Rayskiy.

Senior AI & Android Engineer.

For 15+ years I've designed and shipped Android apps at scale โ€” for HBO, Walmart, Paramount, A&E Networks and more โ€” across streaming, e-commerce, fintech, and gaming. Today I'm also an AI engineer, building agents and hooks on OpenAI, Claude, and Gemini, and shipping my own apps with millions of downloads.

  • 15+years engineering
  • 8M+app downloads
  • 10+apps shipped

01. About Me

I'm an Android and AI engineer. Right now I'm at Paramount, working on the Paramount+ app and building AI agents and hooks (Claude, OpenAI) to automate software development and testing. I contribute to open-source AI projects including AI Studio and Ollama.

Over 15+ years I've architected and delivered mobile apps for major brands โ€” HBO, High 5 Games, A&E Networks, iROKOtv, Stash, and Walmart โ€” spanning streaming, casino gaming, fintech, and e-commerce, and I've led and mentored engineering teams across the US, UK, Nigeria, and Poland.

On the side I build from first principles: a minimalist LLM written from scratch in Kotlin, a C++ scientific-plotting library, my own YACC-based scripting language, and games on Google Play with millions of downloads.

๐ŸŽ“ MS in Physics, Electronics & Applied Mathematics โ€” Nizhny Novgorod State University.

Technologies I work with:

  • Kotlin & Jetpack Compose
  • Kotlin Multiplatform
  • Coroutines / RxJava
  • Dagger / Hilt
  • Java
  • C / C++
  • Python
  • GraphQL / Retrofit
  • Android NDK / JNI
  • AI Agents & LLMs
Photo

02. Experience

Dec 2025 โ€“ Present

Senior AI and Android Engineer @ Paramount

  • Building features for the Paramount+ Android app with modern Android (Kotlin, MVVM, Coroutines, Flows, Retrofit, Jetpack Compose).
  • Writing Claude and OpenAI agents and hooks to automate software development and testing.
May 2022 โ€“ Dec 2025

Staff Android Engineer @ Walmart

  • Built core e-commerce flows โ€” Checkout, Buy Now, and Purchase โ€” for one of the world's largest retail apps.
  • Delivered analytics and accessibility (ADA) components; drove linting, JaCoCo coverage, and unit/instrumentation/functional testing.

Kotlin ยท MVVM ยท Coroutines/Flows ยท GraphQL (Apollo) ยท Dagger/Hilt ยท Jetpack Compose

Nov 2019 โ€“ Mar 2022

Senior Android Engineer @ Stash

  • Designed, architected, and shipped features for the Stash fintech/investing app; mentored and led the technical team.
  • Applied Clean Architecture and defined contracts between backend, orchestration, and front-end layers.

Kotlin ยท Jetpack Compose ยท MVVM ยท Clean Architecture ยท Dagger/Hilt ยท RxJava ยท OpenID Connect

Jun 2017 โ€“ Nov 2019

Senior Android Tech Lead @ iROKOtv

  • Led design, architecture, and development of the iROKOtv video-streaming apps; managed an international team across the US, UK, and Nigeria.
  • Implemented in-app payment systems and Google Cast support.

Shipped: iROKOtv, iROKOtv Plus

May 2016 โ€“ Jun 2017

Lead Android Developer / Team Lead @ A&E Networks

  • Delivered end-to-end SVOD streaming apps; managed a distributed team (NYC + Poland) and worked with Google engineers on testing and UI optimization.

Shipped: Lifetime Movie Club, History Vault

Feb 2015 โ€“ Mar 2016

Lead Mobile Developer / Android Architect @ Valtech

  • Architected the Rogers Eclipse cross-platform video-streaming application (You.i SDK, C++/JNI, OpenGL).
Apr 2014 โ€“ Feb 2015

Android Architect / Team Lead @ High 5 Games

  • Architected Android casino and slot games with high-performance OpenGL rendering and shaders; led the mobile development team.

Shipped: High 5 Casino, High 5 STS

Jul 2013 โ€“ Mar 2014

Senior Android Developer @ HBO

  • Developed the cross-platform HBO GO app; built C++ libraries for image processing, video streaming, and networking, plus an embedded JavaScript engine (Mozilla SpiderMonkey) via C++.

Shipped: HBO GO

Jan 2010 โ€“ Jul 2013

Senior C++ Developer @ Bloomberg LP

  • Architected and built a Portfolio Analytics ETL engine, an SLA/data-integrity system, and a Compliance Management system; developed trading-order management and machine-learning algorithms.

C++ ยท Java ยท Perl ยท Lua ยท Yacc/Lex ยท Solaris/AIX/Linux

03. Apps on Google Play

// Shipped for companies

High 5 Games

๐ŸŽฐ

High 5 Casino

Social casino and slots app. Architected the Android client with high-performance OpenGL rendering and shaders.

AndroidOpenGLGames
View on Google Play โ†’

A&E Networks

๐ŸŽฌ

Lifetime Movie Club

SVOD streaming app for Lifetime Movie Club. Led end-to-end design, delivery, and team.

AndroidStreaming
View on Google Play โ†’

A&E Networks

๐Ÿ›๏ธ

History Vault

SVOD streaming app for HISTORY. Built end-to-end, working with Google engineers on UI optimization.

AndroidStreaming
View on Google Play โ†’

HBO

๐Ÿ“บ

HBO GO

HBO's cross-platform streaming app. Built C++ libraries for image processing, streaming, and networking, plus an embedded JavaScript engine.

C++NDKStreaming

No longer on Google Play

iROKOtv

๐ŸŽž๏ธ

iROKOtv

Leading African video-streaming service. Tech lead for the Android apps โ€” Google Cast, in-app payments, and offline playback.

AndroidStreamingCast

No longer on Google Play

// My own apps

๐Ÿƒ

Preferans

A digital version of Preferans (Pref) โ€” the classic intellectual trick-taking card game. Play against smart AI opponents.

AndroidCard Game
View on Google Play โ†’
โ™ ๏ธ

Omaha Hi/Lo Poker

Omaha Hi/Lo poker for Android โ€” practice and play one of poker's most strategic split-pot variants.

AndroidPoker
View on Google Play โ†’
๐Ÿงฎ

CalcLab

A calculator and computation lab for Android with more power than the built-in.

AndroidUtility
View on Google Play โ†’
๐Ÿ

BoaScript

A scripting language for Android, powered by my own YACC-based BoaScript interpreter.

AndroidLanguage
View on Google Play โ†’

04. Open Source

๐Ÿง 

kortex

A minimalistic LLM (GPT) in Kotlin, built from scratch โ€” for learning the internals of large language models.

KotlinLLM
View on GitHub โ†’
๐Ÿ“ˆ

bplot

Portable C++ scientific plotting library (2D/3D, contours, maps, Hershey fonts) โ€” a modern renewal of a PLplot-descended engine.

C++Graphics
View on GitHub โ†’
โš™๏ธ

ooyacc

An object-oriented take on YACC that generates modern C++ classes instead of C code.

C++Compilers
View on GitHub โ†’
๐Ÿ

boascript

My own scripting language and interpreter, built with a YACC grammar โ€” the engine behind the BoaScript Android app.

YaccLanguage
View on GitHub โ†’

More on github.com/brayskiy โ€” including calclab, androidwidget, and contributions to open-source AI projects (AI Studio, Ollama) and C++ tools like Restbed.

05. What's Next?

Get In Touch

I'm always open to interesting projects and conversations โ€” Android, AI, or anything built from first principles. The best way to reach me is by email or LinkedIn.