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Hi, I’m Kat Y. Lai, a Senior Mobile Developer with extensive experience building high-performance, scalable applications across iOS and Android using React Native, Swift, Kotlin, and Flutter. I design modular, reusable UI components, integrate RESTful and GraphQL APIs, and implement third-party SDKs and payment systems. I enjoy turning complex ideas into smooth, reliable user experiences that perform well across devices. I’m a collaborative team player who works closely with designers, backend engineers, and QA to deliver polished, cross-platform products from concept to release. I optimize performance, ensure responsiveness, and guide teams through architecture decisions, testing, and deployment to production.…Hi, I’m Kat Y. Lai, a Senior Mobile Developer with extensive experience building high-performance, scalable applications across iOS and Android using React Native, Swift, Kotlin, and Flutter. I design modular, reusable UI components, integrate RESTful and GraphQL APIs, and implement third-party SDKs and payment systems. I enjoy turning complex ideas into smooth, reliable user experiences that perform well across devices. I’m a collaborative team player who works closely with designers, backend engineers, and QA to deliver polished, cross-platform products from concept to release. I optimize performance, ensure responsiveness, and guide teams through architecture decisions, testing, and deployment to production.

Kat Y. Lai

App Developer, Web Developer, Full Stack Developer, +2

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Hi, I’m Kat Y. Lai, a Senior Mobile Developer with extensive experience building high-performance, scalable applications across iOS and Android using React Native, Swift, Kotlin, and Flutter. I design modular, reusable UI components, integrate RESTful and GraphQL APIs, and implement third-party SDKs and payment systems. I enjoy turning complex ideas into smooth, reliable user experiences that perform well across devices. I’m a collaborative team player who works closely with designers, backend engineers, and QA to deliver polished, cross-platform products from concept to release. I optimize performance, ensure responsiveness, and guide teams through architecture decisions, testing, and deployment to production.…Hi, I’m Kat Y. Lai, a Senior Mobile Developer with extensive experience building high-performance, scalable applications across iOS and Android using React Native, Swift, Kotlin, and Flutter. I design modular, reusable UI components, integrate RESTful and GraphQL APIs, and implement third-party SDKs and payment systems. I enjoy turning complex ideas into smooth, reliable user experiences that perform well across devices. I’m a collaborative team player who works closely with designers, backend engineers, and QA to deliver polished, cross-platform products from concept to release. I optimize performance, ensure responsiveness, and guide teams through architecture decisions, testing, and deployment to production.

Available to hire

Hi, I’m Kat Y. Lai, a Senior Mobile Developer with extensive experience building high-performance, scalable applications across iOS and Android using React Native, Swift, Kotlin, and Flutter. I design modular, reusable UI components, integrate RESTful and GraphQL APIs, and implement third-party SDKs and payment systems. I enjoy turning complex ideas into smooth, reliable user experiences that perform well across devices.

I’m a collaborative team player who works closely with designers, backend engineers, and QA to deliver polished, cross-platform products from concept to release. I optimize performance, ensure responsiveness, and guide teams through architecture decisions, testing, and deployment to production.

Skills

Experience Level

Expert

Expert

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Expert

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Expert

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Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Software Engineer at Google

March 1, 2017 - November 20, 2025

Collaborated with product and business teams to identify mobile solutions aligned with user needs and business objectives, delivering measurable engagement and performance improvements. Gathered requirements and provided technical guidance on best practices for building responsive, cross-platform mobile applications across iOS and Android ecosystems. Designed and implemented custom end-to-end mobile solutions, integrating APIs, cloud services, and automation tools to enhance usability, scalability, and data visibility. Led the full development lifecycle—from architecture design and code optimization to deployment and issue resolution—ensuring high performance, stability, and seamless user experience across devices.

Software Engineer, Programmer Analyst at Boeing

September 30, 2015 - September 30, 2015

Designed and developed RESTful APIs using Java and MongoDB to support mobile and web applications with scalable and secure data exchange. Built and maintained native Android and iOS applications, including wearable integrations for watchOS, ensuring responsive UI, optimized performance, and seamless synchronization across devices. Engineered advanced communication features using iBeacons, WebRTC, and IceLink, enabling real-time audio and video calls between Android devices without relying on cellular networks. Performed agile development with TDD to ensure high-quality releases and faster iteration cycles.

IT Intern at Boeing

September 30, 2011 - September 30, 2011

Led the design and development of Boeing’s Test & Evaluation application, ensuring seamless integration between mobile clients and a Java-based backend with Oracle database. Collaborated with QA and product teams to define mobile testing strategies, create automated test scripts, and validate app performance across multiple devices. Oversaw agile sprints as Scrum Master, coordinating development, design, and testing teams to deliver stable, responsive mobile and web experiences on schedule. Enhanced data access and API performance, ensuring reliability, security, and scalability for enterprise-grade applications.

IT Intern at IBM

August 31, 2010 - August 31, 2010

Automated build and deployment workflows for mobile applications using Python and XML, significantly accelerating QA testing cycles and reducing manual setup time. Authored internal documentation and tutorials to help developers and QA engineers create automated deployment scripts using in-house tools. Set up and configured cloud-based testing environments for iOS and Android platforms, improving release consistency, device coverage, and overall product stability.