Open to opportunities

Rex Li

@rexli

Message

Engineer with 10+ years building scalable SaaS and microservices that drive business value.

Zimbabwe

Message

What I'm looking for

I’m looking to lead architecture and delivery of scalable event-driven SaaS, mentor teams, and build fault-tolerant systems with strong CI/CD—turning engineering excellence into measurable business outcomes.

I’m a results-driven Staff Engineer with 10+ years delivering scalable SaaS platforms and microservices across the full SDLC. I lead end-to-end technical delivery, partnering with stakeholders to turn engineering decisions into measurable business value.

At WoolWorths Group, I architect and develop a high-volume order orchestration SaaS platform processing 70,000+ orders daily. I’ve delivered over $50M AUD to the business bottom line by developing new revenue-generating features, driving significant cost savings, and building highly scalable systems for future growth.

I build reliable engineering foundations—leading investigation to production deployment, establishing CI/CD and automation, and improving availability through fault-tolerant solutions and faster incident resolution (including reducing MTTR). I also integrate AI tools like GitHub Copilot and Claude into workflows to boost productivity and accelerate delivery cycles.

Experience

Work history, roles, and key accomplishments

Current

Staff Engineer

Current

WoolWorths Group

Oct 2025 - Present (10 months)

Staff Engineer at WoolWorths Group.

Senior

WoolWorths Group

Feb 2022 - Oct 2025 (3 years 8 months)

Architected and developed a high-volume order orchestration SaaS platform processing 70,000+ orders daily, managing the end-to-end order delivery lifecycle. Delivered over $50M AUD to the business bottom line and led fault-tolerant, event-driven microservices with CI/CD and AI-assisted development for faster delivery and incident resolution.

Orchestration CI CD Pipelines Fault Tolerance Log Analysis Diagnostic Scripting Root Cause Analysis Mean Time to Resolution (MTTR)Claude Code Review Technical Documentation SaaS

Tech Lead

Corbel Systems Ltd.

Nov 2018 - Feb 2022 (3 years 3 months)

Provided technical leadership for software architecture and full-stack delivery, including CI/CD and cloud deployment. Managed project progress and mentored a team while modernizing legacy applications and supporting cloud migrations.

Software Architecture Microservices CI CD Pipelines Branching Strategies Full Stack cloud deployment Legacy Applications Cloud Migration Team Leadership Agile

Full Stack Developer & Product Owner

Tardigade Limited

Apr 2017 - Oct 2018 (1 year 6 months)

Developed and architected front-end and back-end services for event-driven microservices in a Docker environment. Drove code quality through unit, integration, and system testing and translated product requirements into technical specifications using Agile methodologies.

Docker Unit Testing Integration Testing System Testing Code Quality Agile Product Requirements Analysis Technical Specifications Product Ownership Event Driven Architecture

Solutions Developer

PCCW Solutions Limited

Mar 2016 - Mar 2017 (1 year)

Developed J2EE web applications and back-end web services/APIs using Spring MVC and related technologies. Implemented web and mobile front-end layouts to support project delivery and performance goals.

J2EE Spring MVC Hibernate Web Services APIs

Team Lead

International Mobile Entertainment Co. Ltd

Sep 2014 - Jan 2016 (1 year 4 months)

Led a team building game app front-ends covering gameplay logic, UI design, and animations. Managed delivery using Scrum, enforced coding standards, and optimized game performance through algorithm evaluation.

Team Leadership Game Logic UI Design Animation Coding Standards Optimization Scrum