Hi, I’m Xeng Lor, a Senior Software Engineer with over a decade of experience building scalable web applications, distributed systems, and cloud-based platforms. I specialize in Node.js (NestJS, Express) and modern front-end frameworks like React, Next.js, and Angular, with Python for backend services. I design REST and GraphQL APIs, implement event-driven architectures, and lead cross-functional teams to align engineering with business outcomes. I’ve delivered cloud-native solutions on AWS, Azure, and GCP using Docker, Kubernetes, and Terraform; I’ve integrated AI tooling and third-party healthcare and e-commerce platforms to boost productivity and product quality. I mentor engineers, apply SOLID principles, Clean Architecture, and DDD, and focus on performance, security, and accessible, reliable software.

Xeng Lor

Hi, I’m Xeng Lor, a Senior Software Engineer with over a decade of experience building scalable web applications, distributed systems, and cloud-based platforms. I specialize in Node.js (NestJS, Express) and modern front-end frameworks like React, Next.js, and Angular, with Python for backend services. I design REST and GraphQL APIs, implement event-driven architectures, and lead cross-functional teams to align engineering with business outcomes. I’ve delivered cloud-native solutions on AWS, Azure, and GCP using Docker, Kubernetes, and Terraform; I’ve integrated AI tooling and third-party healthcare and e-commerce platforms to boost productivity and product quality. I mentor engineers, apply SOLID principles, Clean Architecture, and DDD, and focus on performance, security, and accessible, reliable software.

Available to hire

Hi, I’m Xeng Lor, a Senior Software Engineer with over a decade of experience building scalable web applications, distributed systems, and cloud-based platforms. I specialize in Node.js (NestJS, Express) and modern front-end frameworks like React, Next.js, and Angular, with Python for backend services. I design REST and GraphQL APIs, implement event-driven architectures, and lead cross-functional teams to align engineering with business outcomes.

I’ve delivered cloud-native solutions on AWS, Azure, and GCP using Docker, Kubernetes, and Terraform; I’ve integrated AI tooling and third-party healthcare and e-commerce platforms to boost productivity and product quality. I mentor engineers, apply SOLID principles, Clean Architecture, and DDD, and focus on performance, security, and accessible, reliable software.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Work Experience

Senior Software Engineer at CentralSquare Technologies
October 1, 2023 - Present
Leading large-scale enterprise systems across frontend and backend with focus on reliability and long-term maintainability in a startup, product-driven environment supporting 50K+ active users. Developed frontend applications using React.js, Next.js, and TypeScript; built backend microservices with Node.js and NestJS; used Python (FastAPI/Django) for internal reporting and data transformation tools, reducing manual processing time by 30% and improving workflow efficiency. Designed and implemented RESTful APIs and GraphQL endpoints for high-volume client requests; architected event-driven microservices using Kafka, RabbitMQ, and Redis Pub/Sub to enable asynchronous processing and real-time updates. Optimized PostgreSQL and MongoDB schemas and queries, integrated third-party services, and deployed cloud-native solutions on AWS with Docker, Kubernetes, and CI/CD pipelines. Mentored 7 engineers and promoted SOLID, Clean Architecture, and strong test coverage (Jest, Cypress, Playwright).
Senior Full Stack Engineer at Paycom
October 1, 2018 - September 1, 2023
Managed enterprise-scale web and backend development; delivered frontend with React.js, Next.js, Angular, and TypeScript; built backend microservices with Node.js and NestJS; incorporated Python (Django/FastAPI) for reporting, analytics, and automation workflows. Designed RESTful APIs and GraphQL endpoints handling over 2M API requests daily; integrated Stripe and EDI-based payment and transaction systems. Managed global state with Redux; deployed microservices on AWS using Docker/Kubernetes with automated CI/CD pipelines; refactored legacy monoliths into modular microservices; mentored junior engineers and set architecture standards.
Full Stack Engineer at Clover Health
May 1, 2016 - September 1, 2018
Full-stack healthcare applications with HIPAA compliance; frontend using React.js, Angular, and TypeScript; backend Node.js/Express; HL7/FHIR data integrations; implemented event-driven microservices with RabbitMQ and Redis Pub/Sub for real-time notifications and workflow automation, reducing processing delays by 40%. Optimized PostgreSQL, MongoDB, and Redis; automated CI/CD with Docker, Jenkins, and Kubernetes; ensured secure authentication and RBAC for protected data.
Full Stack Developer at Saritasa
February 1, 2015 - April 1, 2016
Frontend-focused development for client-facing applications; integrated with Node.js/Express backends; designed and maintained MongoDB and SQL database interactions; implemented secure authentication and RBAC for client apps; delivered responsive, maintainable UIs with React.js, HTML5, CSS3, SCSS.

Education

B.S. in Computer Science at Becker College
August 1, 2010 - November 1, 2014

Qualifications

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Industry Experience

Software & Internet, Healthcare, Professional Services, Financial Services, Education

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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