# Liang X.

> Software Engineer

Location: San Diego Metropolitan Area, United States
Profile: https://flows.cv/liang

## Work Experience
### Senior Software Engineer @ ServiceNow
Jan 2023 – Present | San Diego Metropolitan Area
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.

### Principal Software Engineer @ Swiftly
Jan 2023 – Jan 2023 | San Diego Metropolitan Area
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.

### Senior Software Engineer @ Meta
Jan 2021 – Jan 2023 | Menlo Park, California, United States
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.

### Senior Software Engineer @ Facebook
Jan 2021 – Jan 2021 | Menlo Park, California, United States
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.

### Senior Software Engineer @ Facebook
Jan 2017 – Jan 2020 | Menlo Park, CA
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.

### Software Engineer @ Microsoft
Jan 2014 – Jan 2017 | Mountain View, California
Shipped Outlook for Mac 2016.
Built Gmail‑to‑Outlook migration systems for email, contacts, and calendar syncing.
Developed EWS-based travel features and large-scale reliability improvements.
Tech: C++, Objective‑C, SQLite.

### Software Engineer Intern @ NVIDIA
Jan 2013 – Jan 2013 | Santa Clara, California, United States
Designed forced‑idle kernel drivers in Linux/Android to reduce CPU leakage power.
Built event tracing for CPU idle-state selection analysis.

### Software Engineer @ Silicon Image
Jan 2009 – Jan 2011 | Shanghai, China
Built HDMI/MHL firmware for consumer electronics and embedded systems on 8051 MCU.
Delivered internal training sessions on HDMI/MHL technologies.


## Education
### Master's degree in Computer Science
UC Santa Barbara

### Master of Science - MS in Computer Science
Shanghai Jiao Tong University

### Bachelor of Science - BS in Computer Science
Shanghai Jiao Tong University


## Contact & Social
- LinkedIn: https://linkedin.com/in/liang-x-55abab12

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Source: https://flows.cv/liang
JSON Resume: https://flows.cv/liang/resume.json
Last updated: 2026-03-22