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Hi there! I’m Mengqi Liu, a backend engineer based in Waterloo, Ontario, with 9+ years of experience, including 8 years owning distributed systems at scale and leading design decisions. I’ve delivered robust, scalable services and driven cross-team collaboration to meet business goals. I’m experienced with AWS-native architectures, event-driven systems, and observable-driven operations. I enjoy turning complex problems into reliable, maintainable solutions and mentoring teammates along the way.…Hi there! I’m Mengqi Liu, a backend engineer based in Waterloo, Ontario, with 9+ years of experience, including 8 years owning distributed systems at scale and leading design decisions. I’ve delivered robust, scalable services and driven cross-team collaboration to meet business goals. I’m experienced with AWS-native architectures, event-driven systems, and observable-driven operations. I enjoy turning complex problems into reliable, maintainable solutions and mentoring teammates along the way.

Mengqi Liu

Back-End Developer, Full Stack Developer, Cloud Developer, +2

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Hi there! I’m Mengqi Liu, a backend engineer based in Waterloo, Ontario, with 9+ years of experience, including 8 years owning distributed systems at scale and leading design decisions. I’ve delivered robust, scalable services and driven cross-team collaboration to meet business goals. I’m experienced with AWS-native architectures, event-driven systems, and observable-driven operations. I enjoy turning complex problems into reliable, maintainable solutions and mentoring teammates along the way.…Hi there! I’m Mengqi Liu, a backend engineer based in Waterloo, Ontario, with 9+ years of experience, including 8 years owning distributed systems at scale and leading design decisions. I’ve delivered robust, scalable services and driven cross-team collaboration to meet business goals. I’m experienced with AWS-native architectures, event-driven systems, and observable-driven operations. I enjoy turning complex problems into reliable, maintainable solutions and mentoring teammates along the way.

Available to hire

Hi there! I’m Mengqi Liu, a backend engineer based in Waterloo, Ontario, with 9+ years of experience, including 8 years owning distributed systems at scale and leading design decisions. I’ve delivered robust, scalable services and driven cross-team collaboration to meet business goals.

I’m experienced with AWS-native architectures, event-driven systems, and observable-driven operations. I enjoy turning complex problems into reliable, maintainable solutions and mentoring teammates along the way.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Chinese

Advanced

Japanese

Advanced

Work Experience

Experience Cloud Development Engineer at McAfee

July 1, 2020 - August 1, 2025

Led end-to-end delivery of 10+ microservices supporting 1M+ DAU and 5M+ daily requests with 99.9% availability; built event-driven microservices on Kafka; ensured reliability via SLIs/SLOs and Grafana alerting; designed scalable data models using PostgreSQL and Redis; deployed and operated the system on Kubernetes; defined REST APIs and drove cross-team TypeScript integrations.

Software Development Engineer at McAfee

July 1, 2016 - July 1, 2020

Maintained backend service ownership; built a full-stack web service with Python + JavaScript, containerized with Docker, and deployed on AWS; maintained functionality across multiple Windows releases and resolved C++ issues.

Software Development Engineer (Intern) at Amazon.com

August 1, 2015 - December 1, 2015

Constructed asynchronous API calls for AWS services using Java.