Jonathan Lai

I’m a Senior Software Engineer with about 7 years of experience building and maintaining business banking web applications. At Capital One (01/2024 - Present), I led scalable applications, owned design architecture for server-side and client-side components, and translated UI/UX wireframes into responsive experiences.

I’m especially strong in APIs and data reliability: I maintained RESTful APIs and reliable back-end services, implemented RESTful APIs and API design principles, and improved performance and resiliency through deployment and code quality. In production, I troubleshoot with disciplined debugging and SQL queries, restoring service stability within 11 days and improving API throughput by 37% while sustaining code quality.

I also focus on front-end quality and cross-platform delivery. I developed responsive web applications for business banking, emphasized mobile responsiveness, and optimized cross-platform optimization to improve perceived performance and efficiency during peak usage periods. I conduct code reviews on server-side components to strengthen performance, security, and maintainability, reducing defects with actionable, review-ready feedback.

Before my current role, I built RESTful APIs and server-side components at Capital One as Software Engineer (07/2021 - 01/2024) and Associate Software Engineer (08/2019 - 07/2021), reducing latency by 22% and resolving data consistency issues. I started as a Software Engineer Intern at Raytheon (07/2017 - 12/2018), developing Python modules, supporting disciplined maintenance, and contributing to deployment-ready releases—habits that still guide how I design, debug, and deliver today.