![Adrian Liu](https://jobicy.com/react/themes/app/images/avatar.jpg) Adrian Liu # Senior Full Stack Engineer Actively looking · Member since 10 Jun 2025 [Message](https://jobicy.com/dashboard-page.md) ShareLocationIrelandDesired salaryUnspecifiedWork preferenceFull TimeExperience levelNot set * [Overview](#overview) * [Portfolio 0](#portfolio) * [Services 0](#services) ## About Professional summarySenior Full Stack Engineer with 10+ years of experience in designing and delivering scalable, high-performance applications across FinTech, eCommerce, LMS, and Healthcare sectors. Expertise in React, Next.js, Angular, Node.js, Python/Django, and TypeScript, with a proven track record of improving system performance by 50% and increasing user engagement by 25%. Adept at leading cross-functional teams, optimizing architectures, and leveraging modern technologies to drive business growth and efficiency. ## Skills 7 capabilities[Amazon Web Services (AWS)](https://jobicy.com/talent/amazon-web-services-aws.md)[Angular](https://jobicy.com/talent/angular.md)[Django](https://jobicy.com/talent/django.md)[Next.js](https://jobicy.com/talent/next-js.md)[Python](https://jobicy.com/talent/python.md)[TypeScript](https://jobicy.com/talent/typescript.md)[Vue.Js](https://jobicy.com/talent/vue-js.md) ## Experience Career history ### Senior Full Stack Engineer · KPH Healthcare Services Sep 2022 – May 2025• Spearheaded end-to-end design of HIPAA-compliant patient management system for 23 departments, improving data entry speed, appointment scheduling, and communication efficiency, resulting in a 33% faster process (from 27 to 18 mins) by Jan 2025. • Led the development of React.js/Node.js modular architecture with role-based dashboards, achieving 32% faster user task completion (NPS 18% improvement) via dynamic form validation and real-time UI updates. • Scaled MongoDB cluster to 230k+ patient records through horizontal sharding (4-node replica set) by Dec 2024 and compound indexing, slashing read latency 40% (from 850ms to 510ms). • Created zero-trust security model with JWT/OAuth2.0 flows, passing 15+ HIPAA audits (100% compliance rate) via cryptographic session management and HSM integration. • Deployed WebSocket-driven notification system with 99.95% uptime, cutting critical lab result delivery time 20% through RabbitMQ message queuing and priority channels. • Drove a 50% page load improvement (Lighthouse 87+) via Next.js SSR hydration by 17th Nov 2024, implementing dynamic import/code splitting for core modules like EHR charting. • Streamlined CI/CD pipeline automation using Jenkins Groovy DSL, reducing deployment time by 40% (from 22 to 13 mins avg.) with parallelized testing/container builds. • Containerized 12 microservices via Docker and Kubernetes (Helm charts), achieving 99.98% platform availability through pod auto-scaling and rolling update strategies. • Maintained 98% Jest test coverage for 150+ React components, enforcing code quality via ESLint/Prettier hooks and SonarQube vulnerability scanning. ### Full Stack Developer · Colizey June 2019 – Aug 2022• Developed an e-commerce platform with Angular/Node.js for a major retail company serving 175K+ customers by July 2022, boosting order throughput 13% via real-time inventory APIs and distributed transaction processing (Kafka event streaming). • Integrated Keystone.js for flexible content management, designing custom models for product listings, user accounts, and order processing, reducing backend code complexity by 27% and accelerating feature release cycles by 31%. • Implemented GraphQL for API communication, reducing the number of server calls by 28% and improving data fetching efficiency. • Accelerated frontend performance from 5.2s to 2.3s through React.lazy dynamic imports, WebP image optimization, and Service Worker caching strategies. • Integrated PCI-DSS compliant payment stack with Stripe/PayPal SDKs, achieving 10% higher transaction reliability via idempotent retry logic by Aug 2021 and 3D secure enforcement. • Optimized AWS costs 20% ($48K/yr saved) using Lambda auto-scaling, S3 IntelligentTiering (1.2PB data), and CloudFront cache policies (92% hit rate). • Enhanced security with mutual TLS, RBAC (Okta integration), and CSP headers – 40% fewer security incidents while maintaining 99.99% uptime SLA. ### Full-Stack Developer · Docebo Jan 2017 – May 2019• Built Next.js/React LMS platform scaling to 37K+ active users (25% growth), achieving 15% lower bounce rates through SSR implementation (SEO rank from 50th to 20th) and webpack code splitting. • Integrated hybrid GraphQL/REST API layer (Django + Apollo Server), slashing data latency 20% while supporting 40% more concurrent users via query batching and Redis caching by Oct 2018. • Modernized auth flows with JWT rotation/refresh tokens, reducing login duration from 4s to 0.9s by Feb 2019 and achieving Zero Truust compliance through HMAC-signed sessions. • Drove 20% higher user retention via collaborative UX redesign – implementing automic design patterns and WebVitals monitoring (LCP < 1.2s across 95% of pages). ### Junior Web Developer · GECKO Governance Oct 2014 – Dec 2016• Architected Node.js event-driven platform for 50+ institutions, processing 2M+ transactions/day with 18% faster risk model execution via Kafka-streamed market data pipelines. • Developed real-time dashboards (D3.js/WebGL) achieving 92.3% reporting accuracy (+18.8% YoY) by Oct 2016 through schema-first data validation and Canvas GPU optimizations. • Optimized MongoDB aggregation layers & Redis cache TTL policies, slashing query latency 40% (from 850ms to 510ms) via compound indexing and hash slot rebalancing. • Institutionalized Jest/Mocha test automation with CI/CD guardrails, reducing critical bugs 20% through snapshot testing and contract-first API development. ## Education Learning history ### University of Edinburgh 09/2010 – 09/2014Bachelor's degree of Computer Science This professional hasn’t added portfolio projects yet. 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