JASON LEUNG is a highly skilled technical professional with extensive experience in designing and developing complex enterprise systems for internal and external use. With a deep understanding of the latest technologies and best practices, he is able to architect solutions that meet the unique needs of each organization he works with.
Professional Highlights
Freelance Software Engineer
- Transforming ideas into robust applications through thoughtful design and problem-solving.
Senior Software Engineer / System Architect
- Led end-to-end system analysis, architecture, and implementation across enterprise and consulting environments, specializing in C#/.NET, database optimization, and distributed systems.
- Modernized legacy monolithic applications into scalable microservices and event-driven architectures using .NET, Kafka, Docker, and MySQL, achieving up to 40% performance improvement.
- Delivered high-impact performance tuning by rewriting inefficient T-SQL into optimized set-based queries, reducing execution time from hours to milliseconds.
- Designed reusable .NET components published to internal NuGet repositories, reducing development effort by 50% across multiple projects.
- Built proof-of-concept solutions integrating blockchain (ERC-20, Solidity, Hyperledger Besu) with enterprise systems, demonstrating innovation in loyalty and rewards platforms.
Senior System Analyst
- Implemented system integration with 5+ airline companies and 10+ credit card companies which serviced in 70+ international airports.
- Led the onshore and offshore application development team to verify adherence to the highest level of quality standards while also ensuring that all requirements are accurately met.
Systems & Delivery Lead
- Led the design and delivery of a custom Beauty Management System, providing a cost-effective solution for customer issue tracking, monitoring, and resolution.
- Introduced Agile development practices and peer code reviews, improving team collaboration and delivery quality.
- Managed and mentored a small development team, delivering a major system upgrade that enhanced user experience and reduced monthly subscription costs by over $30K.
- Streamlined business workflows and internal systems, driving a 20% improvement in operational efficiency.
Software Engineer
- Performed database defragmentation while optimizing the entire SQL queries, improving database performance and loading speed by 70%.
- Finalized 20 SQL database design projects, revamped queries, and built up stored procedures, triggers, table views, and functions.
- Accomplished 30% improvement in the performance of every ETL / SQL and online component, ensured apt response and data reliability by adhering to stern service level agreement.
Senior Analyst Programmer
- Managed user engagement analytics strategy, providing initial insight into how users interact with our apps on their tablets and mobile devices.
- Oversaw integration of an internal and external technology solution by leading 5 developers and 2 testers from two companies, resulting in an additional $100k of sales.
- Managed the redevelopment of CRM and client-facing app integration use by 500K+ clients and 20 employees, resulting in the addition of 20+ new features, a 20% reduction in load time and a 15% decrease in operation time.
Software Test Specialist
- Successfully executed and rolled out a mobile automation testing solution that reduced regression time by 50%, accelerated the test execution process, and enabled faster release.
- Created a traceability matrix to bridge the gap between requirements and covered tests, contributing to the 10% increase in test case count.
- Established effective team communication that identified, triaged, reproduced, and fixed discovered issues using JIRA, resulting in a 25% increase in overall workflow.
