Available to hire
I’m Christopher Lam, a Senior Full Stack Developer based in Warsaw. I specialize in building scalable web applications using PHP, Laravel, Symfony, and modern JavaScript frameworks like React. I have a track record of delivering robust APIs and intuitive user interfaces while aligning technical decisions with business goals.
I thrive in agile teams, mentor junior developers, and lead projects from ideation to deployment. I’m comfortable with cloud deployments (AWS), containerization (Docker, Kubernetes), and CI/CD pipelines to ensure fast, reliable releases. In my free time I enjoy exploring new technologies and refining performance and security practices.
Skills
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Work Experience
Software Engineer at Opencast
April 1, 2024 - PresentLed the migration of a monolithic PHP application to a microservices architecture using Laravel, improving system scalability by 30% and reducing maintenance overhead by 20%. Developed and maintained RESTful APIs for seamless backend-frontend communication, optimized API response times by 40%. Built interactive React components to improve engagement by 25% and reduce bounce rates by 15%. Implemented cloud infrastructure on AWS (EC2, RDS, S3) for hosting and data storage, achieving a 35% reduction in hosting costs. Containerized services with Docker, implemented real-time notifications via WebSockets, and added unit tests with PHPUnit and Jest achieving ~95% test coverage. Built CI/CD pipelines with Jenkins to automate deployments and reduce deployment time by 30%.
Software Engineer at Opencast
April 1, 2024 - PresentLed the migration of a monolithic PHP application to a microservices architecture using Laravel, boosting system scalability by 30% and reducing maintenance overhead by 20%. Developed and maintained RESTful APIs for seamless frontend-backend communication and improved API response times by 40%. Built interactive React frontend components, increasing user engagement by 25% and reducing bounce by 15%. Implemented AWS-based infrastructure (EC2, RDS, S3) for hosting and storage, cutting hosting costs by 35%. Containerized services with Docker, improving consistency and reducing environment issues by 50%. Implemented real-time notifications via WebSockets in React. Established unit tests with PHPUnit and Jest, achieving high code quality and reducing production bugs by 40%. Automated deployments with Jenkins CI/CD pipelines, reducing deployment time by 30%. Mentored juniors and conducted code reviews to boost team efficiency.
Software Engineer at Opencast
April 1, 2024 - PresentLed the migration of a monolithic PHP application to a microservices architecture using Laravel, improving system scalability by 30% and reducing maintenance overhead by 20%. Developed and maintained RESTful APIs in PHP for seamless backend-frontend data exchange, optimizing API response times by 40%. Created interactive React frontend components, boosting user engagement by 25% and reducing bounce rates by 15%. Implemented AWS-based infrastructure (EC2, RDS, S3) for hosting and storage, achieving a 35% reduction in hosting costs. Containerized services with Docker to improve consistency and reduce environment-related issues by 50%. Developed a real-time notifications system using WebSockets in React for enhanced user interactivity. Integrated unit testing using PHPUnit and Jest to achieve 95% code coverage and reduce production bugs by 40%. Built CI/CD pipelines with Jenkins, automating deployment processes and reducing deployment time by 30%.
Junior Full Stack Developer at Savvycomp
March 31, 2024 - October 13, 2025Assisted in developing dynamic web applications using PHP and React.js, improving overall user experience. Implemented CRUD operations with PHP for robust data handling and optimized SQL queries for better performance. Built simple React components to enhance frontend interactivity and supported internal tools to streamline operations.
Full Stack Developer at Axeos
March 31, 2024 - October 13, 2025Built full-stack applications using PHP Symfony for the backend and React.js for the frontend, reducing page load times by 20%. Integrated React components for a more interactive UI, improving user engagement by 30%. Developed API endpoints in PHP for efficient data exchange and improved performance by 25%. Implemented real-time updates using React.js and WebSockets. Enhanced security with JWT authentication and role-based access controls. Led a client dashboard project, improving client satisfaction by 30%. Contributed to DevOps for automated deployments and feature integrations.
Full Stack Engineer at VentureCraft
March 31, 2024 - October 13, 2025Designed and developed a dynamic e-commerce platform using PHP Laravel for backend and React.js for frontend, driving a 40% increase in conversion rates. Built RESTful APIs for authentication, orders, and payments with high availability. Implemented React with Redux for dynamic updates, reducing page load times by 25%. Optimized MySQL queries, improving response times by 30%. Deployed services to AWS (S3, EC2, RDS) and integrated third-party services (payment gateways, email notifications). Developed unit and integration tests with PHPUnit and Jest, reducing defects by 35%. Built a Jenkins CI/CD pipeline to automate testing, deployment, and rollback strategies, increasing release frequency by 20%.
Junior Full Stack Developer at Savvycomp
March 1, 2024 - October 13, 2025Assisted in developing dynamic web applications using PHP and React.js, improving overall user experience. Implemented CRUD operations with PHP for seamless interaction with databases, enhancing data handling efficiency by 10%. Built simple React.js components to improve frontend interactivity, reducing page load time by 15%. Optimized SQL queries to improve performance and reduce page load times. Participated in the development of an internal tool to manage internal operations more effectively.
Full Stack Developer at Axeos
March 1, 2024 - October 13, 2025Built full-stack applications using PHP Symfony for the backend and React.js for the frontend, improving page load times by 20%. Integrated React components for interactive UI, increasing user engagement by 30%. Developed API endpoints in PHP for data exchange between frontend and backend systems, improving performance by 25%. Implemented real-time updates using React.js and WebSockets; enhanced security by integrating JWT for authentication and role-based access controls. Led the development of a client dashboard for data analysis and reporting, improving client satisfaction by 30%. Contributed to the DevOps pipeline for automated deployments and regular integration of new features. Example project: customer management system using React.js and PHP Symfony.
Full Stack Engineer at VentureCraft
March 1, 2024 - October 13, 2025Designed and developed a dynamic e-commerce platform using PHP Laravel for backend and React.js for frontend, leading to a 40% increase in conversion. Built RESTful APIs for user authentication, orders, and payment processing; implemented Redux for state management, reducing page load times by 25%. Optimized MySQL queries, improving response times by 30% and reducing resource usage. Deployed services to AWS (S3, EC2, RDS), enhancing scalability and fault tolerance. Integrated third-party services (payment gateways, email notifications) and developed unit and integration tests with PHPUnit and Jest, reducing defects by 35%. Built a CI/CD pipeline with Jenkins to automate testing and deployment, increasing release frequency by 20%. Example project: inventory management system using PHP Laravel and React.js.
Junior Full Stack Developer at Savvycomp
March 1, 2024 - October 13, 2025Assisted in developing dynamic web applications using PHP and React.js, improving overall user experience. Implemented CRUD operations with PHP for seamless interaction with databases, enhancing data handling efficiency by 10%. Built simple React.js components to improve the interactivity of the frontend, reducing page load time by 15%. Optimized SQL queries to improve performance and reduce page load times. Participated in the development of an internal tool using PHP and React.js to manage internal operations more effectively.
Full Stack Developer at Axeos
March 1, 2024 - October 13, 2025Built full-stack applications with PHP Symfony for the backend and React.js for the frontend, reducing page load times by 20%. Integrated React components for a more interactive and responsive UI, improving user engagement by 30%. Developed API endpoints using PHP for efficient data exchange between frontend and backend systems, improving performance by 25%. Implemented real-time updates using React.js and WebSockets for live data display. Enhanced application security by integrating JWT for authentication and role-based access controls. Led the development of a dashboard for clients using PHP and React.js, streamlining data analysis and reporting, which improved client satisfaction by 30%. Contributed to the DevOps pipeline for automated deployments and regular integration of new features. Example project: customer management system using React.js and PHP Symfony, improving team efficiency by 20%.
Full Stack Engineer at VentureCraft
March 1, 2024 - October 13, 2025Designed and developed a dynamic e-commerce platform using PHP Laravel for backend and React.js for frontend, leading to a 40% increase in conversion rates. Built RESTful APIs to handle user authentication, orders, and payment processing with high availability. Implemented Redux for efficient state management, reducing page load times by 25%. Optimized MySQL queries, improving response times by 30% and reducing resource usage. Deployed services to AWS (S3, EC2, RDS), enhancing scalability and fault tolerance. Integrated third-party services (payment gateways, email notifications) for smooth transactions and real-time updates. Developed unit tests and integration tests using PHPUnit and Jest, reducing defects by 35%. Built a CI/CD pipeline with Jenkins to automate testing, deployment, and rollback strategies, increasing release frequency by 20%. Example project: inventory management system. Introduced Docker for containerization, improving collaboration and reducing environment issues b
Education
Bachelor of Science at Ton Duc Thang University
January 1, 2012 - January 1, 2016Bachelor of Science in Computer Science at Ton Duc Thang University
January 1, 2012 - January 1, 2016Bachelor of Science at Ton Duc Thang University
January 1, 2012 - January 1, 2016Qualifications
Industry Experience
Software & Internet, Professional Services, Retail
Skills
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Expert
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