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Hi, I'm Jasper Lan, a Senior Full Stack Engineer with 12+ years of experience building enterprise-scale platforms at Microsoft, Twitter, and Hyatt. I specialize in React/Next.js, Node.js, Python, and cloud architectures on Azure and AWS, and I enjoy leading Agile teams to ship secure, high-performance digital platforms across the globe.\n\nBeyond building scalable systems, I focus on GDPR-compliant engineering, ML-driven personalization, and inference optimization for cost, latency, and sustainability. I love bridging AI research to production and driving digital transformation at scale.…Hi, I'm Jasper Lan, a Senior Full Stack Engineer with 12+ years of experience building enterprise-scale platforms at Microsoft, Twitter, and Hyatt. I specialize in React/Next.js, Node.js, Python, and cloud architectures on Azure and AWS, and I enjoy leading Agile teams to ship secure, high-performance digital platforms across the globe.\n\nBeyond building scalable systems, I focus on GDPR-compliant engineering, ML-driven personalization, and inference optimization for cost, latency, and sustainability. I love bridging AI research to production and driving digital transformation at scale.

Jasper Lan

Full Stack Developer, Web Developer, AI Engineer, +2

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Hi, I'm Jasper Lan, a Senior Full Stack Engineer with 12+ years of experience building enterprise-scale platforms at Microsoft, Twitter, and Hyatt. I specialize in React/Next.js, Node.js, Python, and cloud architectures on Azure and AWS, and I enjoy leading Agile teams to ship secure, high-performance digital platforms across the globe.\n\nBeyond building scalable systems, I focus on GDPR-compliant engineering, ML-driven personalization, and inference optimization for cost, latency, and sustainability. I love bridging AI research to production and driving digital transformation at scale.…Hi, I'm Jasper Lan, a Senior Full Stack Engineer with 12+ years of experience building enterprise-scale platforms at Microsoft, Twitter, and Hyatt. I specialize in React/Next.js, Node.js, Python, and cloud architectures on Azure and AWS, and I enjoy leading Agile teams to ship secure, high-performance digital platforms across the globe.\n\nBeyond building scalable systems, I focus on GDPR-compliant engineering, ML-driven personalization, and inference optimization for cost, latency, and sustainability. I love bridging AI research to production and driving digital transformation at scale.

Available to hire

Hi, I’m Jasper Lan, a Senior Full Stack Engineer with 12+ years of experience building enterprise-scale platforms at Microsoft, Twitter, and Hyatt. I specialize in React/Next.js, Node.js, Python, and cloud architectures on Azure and AWS, and I enjoy leading Agile teams to ship secure, high-performance digital platforms across the globe.\n\nBeyond building scalable systems, I focus on GDPR-compliant engineering, ML-driven personalization, and inference optimization for cost, latency, and sustainability. I love bridging AI research to production and driving digital transformation at scale.

Skills

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Expert

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Language

English

Fluent

Work Experience

Senior Full Stack Engineer | Team Lead at Hyatt Hotels Corporation

January 1, 2023 - June 1, 2025

Architected Next.js and React 18 guest-facing apps integrated with Node.js and Python APIs, powering the World of Hyatt digital ecosystem across 1,000+ properties. Implemented secure APIs (OAuth 2.0 + Azure B2C), aligning with Hyatt’s Digital Key initiative. Built LLM-powered chatbots and recommender engines, reducing support tickets by 40% and boosting self-service adoption by 30%. Optimized frontend performance (code-splitting, lazy loading, bundle optimization) to reduce frontend load times by 45%. Supported Colleague Advantage with unified dashboards and automation tools to streamline multi-system workflows. Directed ETL pipelines (Airflow, Kafka, Pandas) and exposed REST/GraphQL APIs. Deployed with CI/CD (GitHub Actions, GitLab CI, Docker) to AWS ECS/EKS. Mentored a team of 6+ engineers and led Agile ceremonies.

Software Engineer - Full Stack & AI/ML at Twitter

February 1, 2019 - August 1, 2022

Built real-time recommendation and feed ranking systems with Node.js microservices + Python ML inference, increasing EU user engagement by 30% while ensuring GDPR data handling requirements. Delivered React/React Native apps for internal safety dashboards and infrastructure analytics. Developed Trust & Safety AI pipelines (NLP with spaCy, NLTK; CV with YOLOv3, Faster R-CNN, Amazon Rekognition) to detect hate speech, misinformation, and CSAM, improving moderation accuracy by 15%. Implemented time-series anomaly detection models to monitor platform health and abuse signals, cutting incident response times by 25%. Collaborated with Cortex and Timeline teams to optimize the 'For You' feed with ML-based personalization, ensuring low-latency, GDPR-compliant delivery at scale. Worked with API safeguards and OAuth expansions to strengthen compliance.

Software Engineer - Full Stack & AI/ML at Microsoft

April 1, 2014 - March 1, 2020

Migrated EU enterprise systems to Azure microservices (Node.js, Python, .NET Core), reducing deployment cycles by 60% and improving scalability. Built secure enterprise APIs (FHIR, REST, GraphQL) for healthcare and finance, achieving GDPR/HIPAA/PCI compliance. Delivered React, Next.js, and React Native applications accelerating multi-platform delivery by 40%. Partnered with AI/ML teams to embed NLP, CV, and predictive models into Azure & Microsoft 365. Designed ML pipelines with Databricks & Spark for training, deployment, monitoring, and scaling. Optimized inference pipelines to reduce GPU/TPU costs, latency, and energy consumption. Contributed to Secure Future Initiative deploying privacy-preserving ML and fraud detection. Implemented CI/CD (Jenkins, Kubernetes, Docker) + event-driven architectures (Kafka, RabbitMQ, WebSockets).