daily trading volume
Handled by a trading backend built with Kotlin, Spring Boot, and PostgreSQL.
Senior Software Engineer · Melbourne, Australia
I build trading
backends and
frontend platforms.
Senior software engineer in Melbourne, focused on fintech, trading systems, frontend architecture, and production reliability.
I design and deliver production software end-to-end, from frontend architecture and APIs to trading backends, developer workflows, and incident signals.
Role fit
Relevant achievements for senior engineering roles.
frontend platform
Component, state, performance, and review standards for a trading product.
mentored
Introduced frontend testing and reusable UI practices across the team.
Now at Cronos Labs
Trading backends, frontend standards, and incident signals.
My current work spans trading backend systems, frontend architecture, and the operational signals teams need to respond with confidence.
- Financial workloads on Kotlin, Spring Boot, and PostgreSQL
- Frontend standards built for performance and long-term change
- Business-metrics alerting for faster incident escalation
Relevant work
Projects that show the kind of problems I can own.
Examples from fintech, trading, and product engineering, framed around responsibility and delivery.
Trading backend reliability
- Context
- A production trading system needed dependable financial workloads and clear operational behaviour.
- Role
- Designed and built backend services with Kotlin, Spring Boot, and PostgreSQL while working close to product and frontend needs.
- Result
- Supported approximately USD 800K in daily trading volume with a backend shaped for reliability and maintainable change.
- Kotlin
- Spring Boot
- PostgreSQL
- Trading systems
Frontend architecture from scratch
- Context
- A trading product needed frontend foundations before the team could scale feature work safely.
- Role
- Led the frontend architecture, defining component structure, state management, performance practices, and review standards.
- Result
- Created a clearer platform for delivery, maintenance, and code review across a growing product surface.
- React
- TypeScript
- Architecture
- Code review
Driver registration modernisation
- Context
- A legacy logistics workflow needed a more maintainable frontend and better production visibility.
- Role
- Led the TypeScript and React revamp, added monitoring, mentored three engineers, and introduced Jest/Cypress testing.
- Result
- Improved the team's ability to ship, diagnose production issues, and maintain frontend quality over time.
- TypeScript
- React
- Monitoring
- Jest
- Cypress
Experience
Fintech, logistics, banking, and game-platform systems shipped in production.
From interactive engines and banking applications to logistics platforms and production trading systems.
Cronos Labs
Senior Software Engineer
Delivering production trading and financial systems across backend architecture, frontend foundations, and operational visibility.
- Designed and built a high-frequency trading backend handling approximately USD 800K in daily trading volume.
- Led the trading frontend architecture from scratch and set standards for components, state management, performance optimisation, and code review.
- Engineered business-metrics alerting for an earn-and-borrow product, enabling prompt incident escalation.
- Kotlin
- Spring Boot
- PostgreSQL
- React
- Observability
Crypto.com
Software Engineer
Built decentralised finance products and supporting APIs while improving the path from local development to release.
- Built a web application for token swapping and liquidity provision with best-rate routing.
- Improved local development, CI, and release workflows to reduce repetitive work and improve delivery efficiency.
- Built a public API exposing NFT metadata and volume information.
- Product delivery
- Public APIs
- Developer workflows
Lalamove
Software Engineer L2
Led a critical frontend modernisation and strengthened the engineering practices around it.
- Led the revamp of a legacy driver-registration application with TypeScript and React, adding frontend monitoring for faster production diagnosis.
- Mentored three junior developers and introduced frontend testing with Jest and Cypress.
- Initiated a reusable UI and icon library to improve developer productivity.
- TypeScript
- React
- Jest
- Cypress
- Frontend monitoring
Derivco
Web Developer
Built interactive game-engine capabilities and the tooling developers needed to inspect them.
- Built and enhanced a Pixi.js web-game engine, delivered games with it, and created a Chrome extension for framework debugging.
- Pixi.js
- JavaScript
- Chrome Extensions
Green Tomato
Web Developer
Delivered customer-facing banking software and an internal human-resources platform.
- Built banking web applications and an internal human-resource management system using Vue.js and Node.js.
- Vue.js
- Node.js
- Web applications
PCCW
Intern
Applied web development and classification techniques to cybersecurity content.
- Built a cybersecurity-article classification web application using Django and SQLite.
- Python
- Django
- SQLite
Strengths
Frontend architecture, backend APIs, delivery, and technical leadership.
Strongest fit for teams building TypeScript/React products, Kotlin or Node.js services, and reliable delivery workflows.
Frontend architecture
Scalable interface foundations, reusable systems, performance, testing, and production monitoring.
- TypeScript
- React
- Next.js
- State architecture
- Design systems
- Jest
- Cypress
Backend & APIs
Production services, public APIs, data modelling, and systems that carry financial workloads.
- Kotlin
- Spring Boot
- Node.js
- NestJS
- Go
- REST
- GraphQL
- PostgreSQL
Delivery & operations
A practical path from local development to dependable releases, diagnosis, and incident response.
- CI/CD
- Docker
- GitHub Actions
- AWS S3
- Firebase
- Sentry
- Grafana
- Kibana
- SigNoz
Technical leadership
Architecture direction, code-review standards, mentoring, and developer-experience improvements.
- System design
- Code review
- Mentoring
- Engineering standards
- Developer tooling
Foundation
Computer science, applied in production.
2019
BSc in Computer Science
The Chinese University of Hong Kong (CUHK)Hong Kong
Get in touch
Building something that needs to work well—and keep working?
I am always open to a focused conversation about reliable, high-impact software.
Email Jason Download CV jason.li.webdev@gmail.com