Crafting resilient cloud systems & GenAI pipelines.
I am Crono Chiu, a Full Stack Software Engineer with over 5 years of engineering experience at Amazon. Specialized in building ultra-reliable serverless web applications using Node.js, React, Python, and AWS Cloud. Spearheaded a landmark GenAI pipeline achieving a 99% operational reduction and architected the complete cloud footprint for ROCS.
Interactive TerminalLive
Execute simulated terminal commands to probe technical background & systems.
Simulate Real-World Request & Chaos Flows
Experience how ROCS and Amazon systems maintain uninterrupted availability during network blackouts and high-throughput events.
How We Built ROCS: Tools & Infrastructure
Restaurant & Retail Operations Cloud Suite. Architected with modern Next.js 16, Python Serverless microservices, and multi-stack AWS CDK automation.
Web & Offline-First POS
Store & cashier interface built for fast response times, zero-latency inputs, and offline reliability.
Next.js 16 (App Router)
CoreServer-side rendering, streaming interfaces, route groups, and OpenNext edge compilation.
React 19
UI CoreConcurrent rendering, modern action hooks, and lightweight reactive components.
Tailwind CSS v4
DesignUtility-first styling with hardware-accelerated layouts and fluid responsiveness.
Redux Toolkit
StateCart state, cashier terminal session control, and reactive POS order synchronization.
Lucide React
AssetsClean SVGs maintaining minimal bundle footprints across devices.
Zod
Type SafetyStrict runtime schema parsing ensuring valid objects enter the application boundary.
Model the 99% Operational Reduction
Based on the AWS EventBridge + Lambda + Amazon Bedrock (Claude) pipeline engineered at Amazon.
EventBridge catches tickets instantly, triggers a Python Lambda function that structures the prompt, asks Amazon Bedrock to categorize and resolve issues using Claude, then auto-updates the ticketing API.
Professional Experience
Over a decade of leadership and systems engineering at Amazon driving measurable outcomes.
Full Stack Web Apps Business Analyst
AmazonKey Deliverables & Achievements
- Overhauled legacy ticket processes with an automated pipeline utilizing AWS EventBridge, Lambda (Python), Amazon Bedrock (Claude), and internal Ticket APIs, eliminating 99% of manual overhead.
- Modernized deployment pipeline by transitioning unsupported legacy packages to AWS CDK for self-mutating CI/CD pipelines, guaranteeing maintainability.
- Collaborated with Senior SDEs to ship front-end components using React & Redux store alongside Java middleware APIs to streamline training planning.
- Mentored new engineers via weekly ramp-ups and bi-weekly architecture sessions; introduced code review protocols resulting in a >20% decrease in deployment failures.
- Developed and maintained a Global Executive Dashboard using React.js, Node.js, and AWS Cloud services, empowering network leaders with real-time OT/VTO visibility.
- Automated ETL workflows using AWS Glue and custom SQL queries to process high-volume datasets into AWS RDS, securing 100% data consistency.
- Revamped a legacy real-time monitoring web application from JS/EC2/Java to modern React.js and AWS SDK/Node.js, cutting maintenance overhead by 50% while boosting runtime performance by >30%.
Senior Workflow Analyst
AmazonKey Deliverables & Achievements
- Streamlined planning and reporting workflows using Excel Power Query connected directly to underlying data sources, converting manual sheet updates into a one-click automated dashboard.
- Spearheaded bi-weekly strategic planning forums with operational leaders across the network to dynamically reallocate resources to emergent priorities.
- Mentored junior team members on departmental data workflows, facilitating career advancements that yielded 3 conversions to permanent positions.
Customer Service Manager
AmazonKey Deliverables & Achievements
- Led high-performing teams of 6–15 associates, leveraging granular metric tracking to coach talent, resolve critical escalations, and maintain premier service standards.
- Identified recurring operational bottlenecks through longitudinal trend analysis and executed targeted remediation initiatives that raised team satisfaction scores.
- Cultivated a persistent culture of psychological safety, continuous process improvement, and rigorous customer-first decision making.
Skills & Technology Matrix
AWS Cloud, Full Stack, Data & GenAI pipelines.
AWS Cloud Infrastructure
ExpertLambda, API Gateway, S3, RDS, DynamoDB, CloudFront, Route53, IAM, CloudFormation.
AWS CDK (Infrastructure as Code)
ExpertSelf-mutating pipelines, multi-stack orchestration, reproducible cloud environments.
GenAI & LLM Orchestration
AdvancedAmazon Bedrock (Claude), prompt engineering, EventBridge automated GenAI pipelines.
React 19 & Next.js 16
ExpertApp Router, SSR, Server Actions, responsive UI architectures, modern state patterns.
TypeScript & Node.js
ExpertStrict typing, modular APIs, enterprise middleware, asynchronous microservices.
Python Serverless
AdvancedAWS Lambda Powertools, Pydantic strict schemas, event-driven handlers, PyJWT.
Data Engineering & AWS Glue
AdvancedETL pipelines, schema validation, batch jobs, automated ingestion to AWS RDS.
SQL & Relational Databases
AdvancedPostgreSQL, MySQL, indexing strategies, strict parameterized queries, schema design.
NoSQL Data Stores
ExpertAmazon DynamoDB, single-table design concepts, key-value document stores.
CI/CD & DevOps Automation
ExpertTurborepo, pnpm workspaces, GitHub Actions, automated test suites, CDK deploys.
Offline-First & PWA Architecture
AdvancedService Workers via Workbox, Dexie.js (IndexedDB), caching strategies for POS.
Automated Testing & Quality
AdvancedVitest, Jest, Amazon Hydra, React Testing Library, strict linter enforcement.
Ready to Build Resilient Cloud & AI Systems?
Whether you are designing enterprise serverless microservices, automating complex SDLC pipelines with GenAI, or deploying offline-resilient web applications—let's connect.