Jonny Williams

Lennar – Remote June 2023 - PRESENT

Developed responsive React.js web applications for the company’s SaaS platforms, utilizing JavaScript, HTML5, and CSS3 to enhance user experience and accessibility.
Implemented state management solutions using Redux and integrated REST APIs and GraphQL for efficient data management across components.
Ensured cross-browser compatibility and responsiveness using CSS-in-JS libraries like Styled Components and Emotion.
Built cross-platform mobile applications using React Native, ensuring compatibility with both iOS and Android platforms.
Integrated Next.js for SEO enhancement and improved application performance through static site generation (SSG) and server-side rendering (SSR).
Secured APIs and frontend interactions using OAuth2 for authorization and JWT for secure token-based authentication.
Adhered to OWASP best practices, ensuring frontend architecture resilience against common security vulnerabilities such as CSRF and SQL Injection.
Leveraged AWS services (Lambda, EC2, S3) for serverless functions, reducing server costs and enhancing application efficiency.
Employed Continuous Integration/Continuous Deployment (CI/CD) practices, automated testing with Jest, Cypress, and Selenium, and version control using Git.
Used PostgreSQL for database management in application data handling.

eBay – Remote Jan 2022 – Aug 2023

Led the development of a Personalized Product Recommendation Engine to enhance user engagement and optimize the customer experience using React.js and Next.js.
Collaborated with cross-functional teams, including data scientists and product managers, to build a scalable system while utilizing remote collaboration tools like Microsoft Teams for effective communication.
Utilized GraphQL for efficient data querying, ensuring users received relevant product suggestions instantly.
Developed microservices using Node.js and TypeScript, enabling independent scaling and easier maintenance of applications.
Implemented real-time data processing with Apache Kafka, allowing dynamic updates to recommendations based on user activity, achieving response times under 200ms.
Deployed the system on AWS, using services like AWS Lambda for serverless computing and DynamoDB for scalable data storage.
Ensured smooth orchestration of the microservices using Docker and Kubernetes to handle millions of users efficiently.
Managed and queried data with SQL and PostgreSQL to enhance system functionality and reporting.

PwC – New York, NY May 2017 – Dec 2021

Developed responsive React.js applications for healthcare services, focusing on enhancing user experience and mobile accessibility using JavaScript, HTML5, and CSS3.
Collaborated with backend teams to integrate RESTful APIs and implemented OAuth2 to ensure secure, HIPAA-compliant user authentication.
Utilized Python for developing data processing scripts and enhancing backend functionality, and contributed to team communication, demonstrating strong problem-solving skills.

Procore – Sydney, Australia Jul 2014 – May 2017

Developed React.js and React Native applications to enhance project management tools for the construction industry, focusing on building responsive, user-friendly interfaces across web and mobile platforms.
Gained experience with SQL/T-SQL and MS SQL Server for managing data and improving reporting capabilities.

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