Mobile-Adaptive Design: Lead Engineer on designing critical backend components to enable seamless, performant mobile experiences; redesigned Service Worker architecture to optimize caching and state synchronization for mobile devices.

Building core backend services and frontend runtime components for the low‑code platform powering all ServiceNow web applications.

Modernizing UI architecture to support intelligent component rendering, runtime responsiveness, and cross-device consistency.

Tech: Java, JavaScript, GraphQL, MariaDB, MySQL, AWS, CI/CD.

Designed and operated high-throughput ads serving APIs (GraphQL + REST) integrating with Microsoft Xandr, handling large-scale real-time ad requests.

Led platform engineering and built distributed backend systems with Kotlin/Java + Redis + Cosmos, optimized for low-latency request paths and strong consistency.

Security & Auth: Built high-volume retail cashback APIs with a strong security posture, implementing JWT-based authentication and authorization to protect financial transaction integrity.

Developed platform SDKs enabling external developers to integrate retail and payment services with minimal friction.

Led a 4-engineer team enabling Instagram advertisers to create ads through Meta Business Suite.

Built backend and frontend systems used by millions of advertisers, improving performance and reliability.

Established cross-org collaboration with Instagram, Facebook, and WhatsApp teams.

Tech: React, JavaScript, Hack/PHP, Python, PostgreSQL.

Developed secure permission and access control systems for WhatsApp admin tool, Instagram internal tooling, and messaging infra.

Built data-access abuse detection systems to monitor policy violations.

Optimized Presto SQL infrastructure and query functions.

Tech: PHP, Python, Presto, Hive, SQL, Java.

Re-designed Facebook Boosted Post with a modern web stack (React, GraphQL, Hack/PHP) to improve reliability and performance; main engineer for the Billing and Payment workflows, collaborating with the Payment team to drive strong revenue growth.

Built an asynchronous ads creation backend, recovering significant advertiser revenue.

Tech: React, GraphQL, Hack/PHP.