Senior Engineer at SpaceXAI
California, United States
Dmitrii Kostriukov
Council Member
Dmitrii Kostriukov is a Staff Software Engineer with over 15 years of experience building large-scale consumer products, developer platforms, and fintech systems, with deep expertise in Android engineering, mobile UI architecture, and engineering team leadership.
Dmitrii Kostriukov currently serves as a Senior Engineer at xAI (June 2026 to present), where he contributes to building frontier AI systems designed to accelerate human scientific discovery, working across frontier reasoning, real-time voice, and generative media. Prior to this, he spent a year and a half as a Staff Software Engineer at PayPal (January 2025 to June 2026), where he defined and implemented enterprise-wide Jetpack Compose standards covering architecture, public APIs, testing, and quality metrics, ensuring consistency across all teams. He led and mentored a team of over 10 engineers to deliver a complete Jetpack Compose component library and establish application-wide UI architecture ahead of schedule. He also architected and launched a dynamic UI analytics platform that exceeded market competitor capabilities, designed an AI-assisted UI architecture to simplify code generation while maintaining performance standards, and introduced automated testing and static analysis pipelines that significantly reduced test execution time while maintaining high code coverage.
Before joining PayPal, Dmitrii Kostriukov was a Senior Android Engineer at Human Inc. (October 2022 to November 2024), a decentralized digital identity platform. There he designed and implemented a face scanning module that accelerated verification checks by three times and reduced low-quality FaceMap submissions by 50%. He implemented critical product sections including authentication, verification, wallet, onboarding, and remote server management, integrating third-party services such as Facetec and KYC providers. Over a six-month period he ran over 25 UI/UX experiments to test product hypotheses, and he designed a module enabling third-party developers to connect verification services through web interfaces using a simple set of JavaScript scripts. He also delivered performance improvements that accelerated app launch by two times, contact analysis by ten times, and image generation by five times.
Dmitrii Kostriukov currently serves as a Senior Engineer at xAI (June 2026 to present), where he contributes to building frontier AI systems designed to accelerate human scientific discovery, working across frontier reasoning, real-time voice, and generative media. Prior to this, he spent a year and a half as a Staff Software Engineer at PayPal (January 2025 to June 2026), where he defined and implemented enterprise-wide Jetpack Compose standards covering architecture, public APIs, testing, and quality metrics, ensuring consistency across all teams. He led and mentored a team of over 10 engineers to deliver a complete Jetpack Compose component library and establish application-wide UI architecture ahead of schedule. He also architected and launched a dynamic UI analytics platform that exceeded market competitor capabilities, designed an AI-assisted UI architecture to simplify code generation while maintaining performance standards, and introduced automated testing and static analysis pipelines that significantly reduced test execution time while maintaining high code coverage.
Before joining PayPal, Dmitrii Kostriukov was a Senior Android Engineer at Human Inc. (October 2022 to November 2024), a decentralized digital identity platform. There he designed and implemented a face scanning module that accelerated verification checks by three times and reduced low-quality FaceMap submissions by 50%. He implemented critical product sections including authentication, verification, wallet, onboarding, and remote server management, integrating third-party services such as Facetec and KYC providers. Over a six-month period he ran over 25 UI/UX experiments to test product hypotheses, and he designed a module enabling third-party developers to connect verification services through web interfaces using a simple set of JavaScript scripts. He also delivered performance improvements that accelerated app launch by two times, contact analysis by ten times, and image generation by five times.
Dmitrii Kostriukov spent nearly seven years at VK.com, Europe's largest social network with over 600 million users, advancing from Senior Software Developer to Head of Development Team. As Head of Development (October 2019 to April 2022), he directed product development for VK Feed, the application's main page, leading a team that built Discover, Thematic Feeds, Reactions, and a Post Redesign, collectively achieving 10% year-over-year growth in user engagement. He also founded and scaled VK Donut, a creator content monetization platform that generated $3 million for platform creators in its first year and sustained 40% quarter-over-quarter growth. As a Senior Software Developer (July 2015 to October 2019), he led a team of four engineers responsible for News Feed development, overseeing core modules including navigation and groups. He developed a new music player with streaming playback and parallel caching that raised the crash-free rate from 98% to 99.9%, and led a complete app redesign with a team of three engineers delivered in three months, resulting in a 32% increase in user engagement.
Earlier in his career, Dmitrii Kostriukov worked as a Mobile Application Developer at Odnoklassniki (OK.ru) from March 2013 to September 2014, where he rewrote key sections of the app including the profile, friends, and navigation, transitioning from web-based to native components and achieving a near-zero crash rate. From February 2011 to March 2013, he was an Android Engineer at BNet, an outsourcing company, where he built the primary app for Ivi, Russia's largest streaming platform with 30 million monthly users, delivered within a two-month timeframe. The application ensured stable streaming playback across all devices, including lower-end hardware, and its architecture supported long-term maintenance without requiring structural changes for many years. He began his professional career as a Full Stack Engineer at LanTa (February 2010 to February 2011), maintaining an integrated infrastructure management and billing system built on J2EE and PostgreSQL, with zero major billing incidents or system failures throughout his tenure.
Earlier in his career, Dmitrii Kostriukov worked as a Mobile Application Developer at Odnoklassniki (OK.ru) from March 2013 to September 2014, where he rewrote key sections of the app including the profile, friends, and navigation, transitioning from web-based to native components and achieving a near-zero crash rate. From February 2011 to March 2013, he was an Android Engineer at BNet, an outsourcing company, where he built the primary app for Ivi, Russia's largest streaming platform with 30 million monthly users, delivered within a two-month timeframe. The application ensured stable streaming playback across all devices, including lower-end hardware, and its architecture supported long-term maintenance without requiring structural changes for many years. He began his professional career as a Full Stack Engineer at LanTa (February 2010 to February 2011), maintaining an integrated infrastructure management and billing system built on J2EE and PostgreSQL, with zero major billing incidents or system failures throughout his tenure.