Available to hire
Hi, I’m AARON LIU, a senior full-stack engineer with 20+ years of experience shipping production systems across payments, fintech, e‑commerce, and enterprise software. I’ve recently solo-built multiple AI-powered SaaS products from scratch, handling everything from system architecture and LLM integration to DevOps and production monitoring.
I have deep expertise in TypeScript/Node.js, PostgreSQL, AWS, and payment system architecture, and I’ve delivered mission-critical systems for Fortune 500 clients including IBM, Caterpillar, and Kinectrics.
Skills
Experience Level
Expert
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Language
English
Fluent
Chinese
Fluent
Work Experience
Software Engineer / Product Lead (LeadRelay, AI-powered SMS receptionist) at BowenInfo Ltd.
January 1, 2024 - PresentLed design and implementation of AI-powered SaaS products, including a multi-provider LLM gateway with atomic Lua slot acquisition, split timeouts, circuit breakers and automatic failover; built async webhook decoupling with BullMQ; implemented SMS suppression with exponential decay logic and Twilio Lookup-based landline detection; created SSE-based live conversation streaming hub and monitoring dashboard; delivered comprehensive test suite (150+ tests).
Tech Lead / AI Operations Architect (OpsPilot) at BowenInfo Ltd.
January 1, 2024 - PresentTelegram-based AI operations bot for multi-app infrastructure management; automated monitoring, alerting, and deployment orchestration across 3 EC2 instances; conducted stress testing using AWS Spot Instances; implemented log uploads to S3 and Telegram notifications.
Android Developer / AI App Engineer (ShubhPilot) at BowenInfo Ltd.
January 1, 2024 - PresentGoogle Play Android app for daily Vedic astrology; native Kotlin frontend with Express.js backend on Docker/EC2; Google Play Billing; Firebase Auth; daily horoscope generation with concurrency control; web dashboard at app.shubhpilot.com.
Prototype Engineer / Payment Orchestration (TurboPay) at Bellarivia Limited
January 1, 2025 - PresentPrototype payment orchestration platform for cross-border merchant settlement in India; unified API aggregation layer normalizing transactions across multiple providers with automated reconciliation and multi-currency reporting.
Solutions Architect / Tech Lead (Merchant Technology Services) at Bellarivia Limited
January 1, 2023 - PresentEnd-to-end website development, hosting, and technical support for Indian merchant clients across agriculture, textiles, food processing, gems, and e-commerce. Next.js, Vercel, Cloudflare.
Director & Principal Consultant at BowenInfo Inc.
January 1, 2011 - January 1, 2015Enterprise software consulting for Fortune 500 and major institutional clients. Architecture design, system integration, and custom development. Kinectrics (Nuclear): Anti-Corruption Layer, SAP integration (CATS); Caterpillar: Hybrid deployment; IBM: Expression Trees; Genworth: Enterprise system development.
Founder & CTO at Shoppers Smart LLC
January 1, 2015 - January 1, 2024Built and scaled Amazon private-label e-commerce operation to 1.37M peak annual revenue. Cloud-native architecture (AWS Lambda, SQS/SNS, Kafka); ETL with Airflow; automated 90% of daily operations; managed distributed teams across China, India, Philippines, and North America.
Solutions Architect at Loblaw Companies (Contract)
January 1, 2010 - January 1, 2010Designed and developed LCL systems for Canada’s largest retailer; architecture design and system integration.
Software Developer at Dun & Bradstreet
January 1, 2009 - January 1, 2010Data systems for global business intelligence.
System Analyst at Novamerican Steel
January 1, 2008 - January 1, 2009Replenishment system using Dynamic LINQ.
Software Engineer at Shanghai Theway Electronic Technologies
January 1, 2000 - January 1, 2005Public information systems for Shanghai Subway and Pudong Airport. Full-stack: C++, SQL Server, industrial hardware integration.
Education
MRes (Master of Research) at University of Liverpool, UK
January 1, 2014 - March 25, 2026MSc (Master of Science) at University of Liverpool, UK
January 1, 2011 - March 25, 2026Qualifications
MCSE
January 11, 2030 - March 25, 2026MCDBA
January 11, 2030 - March 25, 2026MCPD
January 11, 2030 - March 25, 2026Industry Experience
Software & Internet, Financial Services, Professional Services, Computers & Electronics
Skills
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Expert
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