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Senior Full-Stack Engineer with 9+ years of experience building and scaling production web and mobile platforms. I have experience working across both startup and enterprise environments; very comfortable owning features end-to-end — from architecture and backend APIs to polished frontend user experiences. My focus is building clean, maintainable, and scalable systems that teams can iterate on quickly. Core expertise: • React / Next.js / TypeScript • React Native mobile applications • Node.js and Python backend development • REST APIs & GraphQL • PostgreSQL / SQL • Cloud infrastructure (AWS) • Docker & CI/CD pipelines • System architecture & performance optimization Available for remote contract full or part time work.…Senior Full-Stack Engineer with 9+ years of experience building and scaling production web and mobile platforms. I have experience working across both startup and enterprise environments; very comfortable owning features end-to-end — from architecture and backend APIs to polished frontend user experiences. My focus is building clean, maintainable, and scalable systems that teams can iterate on quickly. Core expertise: • React / Next.js / TypeScript • React Native mobile applications • Node.js and Python backend development • REST APIs & GraphQL • PostgreSQL / SQL • Cloud infrastructure (AWS) • Docker & CI/CD pipelines • System architecture & performance optimization Available for remote contract full or part time work.

Zac Jiang

Front-End Developer, Full Stack Developer, Back-End Developer, +3

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Senior Full-Stack Engineer with 9+ years of experience building and scaling production web and mobile platforms. I have experience working across both startup and enterprise environments; very comfortable owning features end-to-end — from architecture and backend APIs to polished frontend user experiences. My focus is building clean, maintainable, and scalable systems that teams can iterate on quickly. Core expertise: • React / Next.js / TypeScript • React Native mobile applications • Node.js and Python backend development • REST APIs & GraphQL • PostgreSQL / SQL • Cloud infrastructure (AWS) • Docker & CI/CD pipelines • System architecture & performance optimization Available for remote contract full or part time work.…Senior Full-Stack Engineer with 9+ years of experience building and scaling production web and mobile platforms. I have experience working across both startup and enterprise environments; very comfortable owning features end-to-end — from architecture and backend APIs to polished frontend user experiences. My focus is building clean, maintainable, and scalable systems that teams can iterate on quickly. Core expertise: • React / Next.js / TypeScript • React Native mobile applications • Node.js and Python backend development • REST APIs & GraphQL • PostgreSQL / SQL • Cloud infrastructure (AWS) • Docker & CI/CD pipelines • System architecture & performance optimization Available for remote contract full or part time work.

Available to hire

Sydney, Australia

Senior Full-Stack Engineer with 9+ years of experience building and scaling production web and mobile platforms.

I have experience working across both startup and enterprise environments; very comfortable owning features end-to-end — from architecture and backend APIs to polished frontend user experiences.

My focus is building clean, maintainable, and scalable systems that teams can iterate on quickly.

Core expertise:

• React / Next.js / TypeScript
• React Native mobile applications
• Node.js and Python backend development
• REST APIs & GraphQL
• PostgreSQL / SQL
• Cloud infrastructure (AWS)
• Docker & CI/CD pipelines
• System architecture & performance optimization

Available for remote contract full or part time work.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Engineer at Homemade

September 1, 2024 - October 27, 2025

Digital platform connecting aged support workers with clients. Part of the scale-up journey, expanding features, performance, and system reliability. Led migration of SAP CPI to a NodeJS service, reducing cost and improving scalability. Streamlined CI/CD pipelines using trunk-based development. Standardised coding and documentation practices across the full stack. Mentored engineers on best practices, raising overall engineering standards.

Co-Founder & Director at Ray Digital Ltd

June 1, 2025 - October 27, 2025

Technical partner for a cross-platform marketplace (Vue, React Native, NodeJS, Azure). Scaled the company from startup to growth stage, leading end-to-end product development and delivery. Built automatic dispatch system reducing logistics company planning time by ~4 hours daily. Developed MVP diet and recipe app enabling personalised meal planning.

Senior Full Stack developer at Onit

September 1, 2024 - September 1, 2024

Global legal spend and analytics platform integration. Managed integration of newly acquired analytics platform into Onit’s ecosystem. Improved platform performance by 30% by resolving database bottlenecks. Enabled adoption by 20+ enterprise clients through system integration and onboarding support. Prevented potential data leaks by identifying and remediating security vulnerabilities. Partnered with executives and product teams to improve platform profitability and reduce churn.

Frontend Developer at The Access Group

March 1, 2023 - March 1, 2023

UK-based business software provider serving 100,000+ customers. Increased app performance by 20% through reengineering. Guided development teams on internal React UI library adoption post Reckon acquisition. Resolved major UX flaws, improving usability and customer satisfaction.

Software Engineer at Air New Zealand

February 1, 2021 - February 1, 2021

New Zealand national flag carrier. Delivered $15M annual savings via supplier contract automation and integration. Decommissioned vendor applications, saving $270K per year in licensing. Introduced MFA across internal systems, strengthening security. Developed Total Operational Performance app, replacing 5 legacy systems. Maintained and optimised mission-critical apps for airport, flight, and crew operations.

Software Engineer at Self-employed

May 1, 2025 - May 1, 2025

Delivered one-off software projects for a range of clients, from small businesses to startups. Scoped, developed, and deployed tailored solutions across web and mobile platforms.

Director at Westown Fish Supplies Eatery

December 1, 2012 - December 1, 2012

Owner of a fish supplies eatery. Gained communication, management and organisational skills that significantly benefited career in Software Engineering. Grew revenue and reduced costs through negotiations.

Senior Full Stack Developer at Onit

March 1, 2023 - September 1, 2024

Managed integration of newly acquired analytics platform into Onit’s ecosystem. Improved platform performance by 30% across enterprise analytics platform serving 3000+ clients. Enabled adoption by 20+ enterprise clients through system integration and onboarding support. Prevented potential data leaks by identifying and remediating security vulnerabilities. Partnered with executives and product teams to achieve platform profitability and reduce churn.

Frontend Developer at The Access Group

February 1, 2021 - March 1, 2023

Increased app performance by 20% through strategic re-engineering. Guided development teams on internal React UI library adoption post Reckon acquisition. Resolved major UX flaws, improving usability and customer satisfaction.

Software Engineer at Air New Zealand

November 1, 2019 - February 1, 2021

Delivered $15M annual savings via supplier contract automation and integration. Decommissioned vendor applications, saving $270K per year in licensing. Introduced MFA across internal systems, strengthening security. Developed Total Operational Performance app, replacing 5 legacy systems. Maintained and optimised mission-critical apps for airport, flight, and crew operations.

Software Engineer at Self-employed

June 1, 2018 - May 31, 2025

Delivered one-off software projects for a range of clients, from small businesses to startups. Scoped, developed, and deployed tailored solutions across web and mobile platforms.

Director at Westown Fish Supplies Eatery

November 1, 2009 - December 1, 2012

Owner of a fish supplies eatery. The communication, management and organisational skills I gained during this venture have significantly benefited my career in Software Engineering.