I build systems where correctness matters.

Part-time contract engineer on a Sydney personal-training gym's internal coaching platform and its companion member app, covering payments, performance, access control, release process and mobile.

• Migrated recurring payments from Adyen to Stripe across renewals, new member sales and instalment plans
• Built the payment workflow engine in n8n, with Xero accounting codes and GST handling
• Investigated and reduced coach dashboard load time on the member roster, profiling the slow queries behind it
• Audited production schema drift and restored silently broken features with no data loss
• Enforced member-app publishing permissions in Postgres with row-level security
• Shipped Android Health Connect through consent, privacy disclosure and Google Play review
• Added pull-request CI, concurrency and capacity testing on the booking system, and a release QA process

Led the technical evolution of a global crypto education platform, with a focus on high-concurrency architecture and real-time community engagement.

• Rebuilt the global crypto platform on Next.js and NestJS for long-term modular scalability
• Developed real-time notification and social features powering premium memberships
• Integrated Stripe subscriptions and Ably messaging into a high-availability cloud stack
• Architected and deployed new revenue-generating features with product leadership

Engineered the identity and authentication layer for enterprise-grade workflow-automation tools.

• Built secure authentication services for enterprise automation with Node.js and Docker
• Designed DynamoDB-backed identity management for high-concurrency workflows
• Implemented real-time operational monitoring with AWS CloudWatch

Led engineering for a fintech startup, building a secure dispute-resolution engine for online transactions.

• Architected a secure fintech dispute-resolution engine from concept to MVP
• Built complex transaction workflows with Next.js, Node.js, and PostgreSQL
• Defined the technical roadmap and core engineering decisions for the startup

Architected backend services and integrated blockchain protocols for an international trading ecosystem.

• Designed backend services for a trading platform on Node.js and PostgreSQL, including real-time trading analytics and financial-data processing
• Integrated external financial-data APIs and blockchain functionality into the platform's application workflows
• Owned technical architecture as CTO, translating product and business requirements into the backend and integration design

Built decentralized applications and backend services for enterprise blockchain solutions.

• Developed decentralized applications and backend services around the ProximaX blockchain ecosystem
• Built application flows covering blockchain authentication, transactions, and integration between conventional services and decentralized infrastructure
• Contributed scalable backend and microservice functionality supporting enterprise blockchain applications

Developed blockchain applications, SDK integrations, and developer tooling.

• Developed applications and integrations around the NEM blockchain ecosystem, including SDK and API integrations
• Built developer tooling that made blockchain functionality easier to integrate into conventional applications
• Worked through the security and performance considerations of blockchain-connected application workflows

Developed healthcare and enterprise software across frontend, backend, and cloud infrastructure.

• Developed healthcare and enterprise software across frontend and backend systems
• Built and integrated custom APIs, and worked on database-backed application workflows
• Improved database and application performance for business and healthcare systems

Developed mobile and web applications for international clients.

• Developed web and mobile applications for international clients, across frontend and backend
• Worked on cloud-connected and IoT-style applications involving real-time data and analytics
• Built backend functionality for processing and storing application and device data, connected through to client-facing web and mobile experiences