{ "$schema": "https://raw.githubusercontent.com/jsonresume/resume-schema/v1.0.0/schema.json", "basics": { "name": "David Manzanarez", "label": "Senior Software Engineer · Technical Lead", "email": "dmanzv@gmail.com", "url": "https://dmanzv.com", "summary": "Engineer on Amazon Checkout since 2018; senior since 2022. Technical direction across the Checkout organization while still building core systems. Agents for engineering work: durable, retry-safe workflows with human review, and MCP tooling over production observability. Authorized to work in the U.S. without sponsorship. Open to relocation for compelling work.", "location": { "city": "Seattle", "region": "WA", "countryCode": "US" }, "profiles": [ { "network": "LinkedIn", "username": "david-manzanarez-39075a129", "url": "https://www.linkedin.com/in/david-manzanarez-39075a129/" }, { "network": "GitHub", "username": "davidmanzanarez", "url": "https://github.com/davidmanzanarez" } ] }, "work": [ { "name": "Amazon", "position": "Senior Software Engineer", "location": "Seattle, WA", "url": "https://www.amazon.com", "startDate": "2022-10", "summary": "Checkout. Since 2025 leads Checkout's AI engineering work; in 2026 scope expanded to technical direction across the organization.", "highlights": [ "Engineering agents: designed and built durable workflows for maintenance tasks such as removing expired feature flags. Each task is validated against an operating procedure and runs as a state machine that records each step, so stalled or failed agent runs resume without repeating completed work. Outputs are evaluated and require human review before merge.", "Built MCP tooling over purchase-journey data and service logs, with caching and query limits to protect production systems.", "Add to Delivery: set the Checkout architecture and led execution across 20+ engineers in four organizations; later led the expansion to five European marketplaces.", "Java microservices migration: technical lead for a multi-year migration from a monolith involving 30+ engineers, largely completed in 2025; designed core APIs and plugin interfaces and coordinated rollout while dependent teams kept shipping.", "Checkout resilience: reshaping the resilience roadmap around the customer's ability to complete a purchase, including fallback data and experiences when dependencies fail.", "Customer-experience federation: built a rendering-layer federation prototype that became a funded org program.", "Reviews architecture designs and 800+ code changes a year across a 50+ engineer organization; weekly technical consultations serving 100+ engineers annually; mentored 4-5 engineers toward senior promotion." ] }, { "name": "Amazon", "position": "Software Engineer II", "location": "Seattle, WA", "startDate": "2020-08", "endDate": "2022-09", "highlights": [ "Led checkout changes across international marketplaces for Brexit, KYC requirements, and India marketplace regulations, with tax and compliance teams.", "Designed the latency measurement framework for the platform migration and a modular framework separating front-end rendering from back-end data operations.", "Prepared checkout systems for Prime Day and Black Friday through load, stress, and chaos testing, then automated those tests for future peak events.", "Reworked onboarding and ran daily office hours as 15+ new engineers joined the team." ] }, { "name": "Amazon", "position": "Software Engineer I", "location": "Seattle, WA", "startDate": "2018-07", "endDate": "2020-07", "highlights": [ "Extended the base chaos-testing framework, adapted it for Amazon Checkout, and integrated it into CI/CD.", "Built client-side event protection for one-click checkout and coordinated adoption across 24 partner teams.", "Built a plugin-based internationalization framework for language and currency formatting across all marketplaces." ] }, { "name": "Amazon", "position": "Software Engineer Intern", "location": "Seattle, WA", "startDate": "2017-05", "endDate": "2017-08", "highlights": [ "Designed and shipped a reusable one-click purchase component proof of concept for integration across shopping pages." ] } ], "education": [ { "institution": "Monterrey Institute of Technology (Tec de Monterrey)", "area": "Computer Science", "studyType": "B.S.", "startDate": "2012", "endDate": "2017", "score": "4.00 GPA, Summa Cum Laude", "courses": [ "Full-tuition merit scholarship", "ACM-ICPC Mexico Regional Finalist, 2015" ] }, { "institution": "University of British Columbia", "area": "Exchange program (machine learning and AI, computer graphics, astrophysics)", "studyType": "Exchange", "startDate": "2016", "endDate": "2016", "courses": [ "Certificate of Academic Excellence", "Canadian Government Scholarship" ] } ], "skills": [ { "name": "Languages", "keywords": [ "Java", "Python", "TypeScript", "JavaScript", "SQL", "Perl", "Bash" ] }, { "name": "Systems and architecture", "keywords": [ "Distributed systems", "Microservices", "REST APIs", "Event-driven architecture", "API contracts", "Latency optimization", "Resilience engineering" ] }, { "name": "Cloud and infrastructure", "keywords": [ "AWS (EC2, ECS, S3, DynamoDB, RDS, ElastiCache, SQS/SNS, Kinesis, API Gateway, CDK, CloudFormation, CloudWatch, Bedrock)", "Docker", "Linux", "Git", "CI/CD", "GitHub Actions" ] }, { "name": "Frameworks and web tooling", "keywords": [ "Spring", "React", "React Router", "Hono", "Node.js", "Vite", "Tailwind CSS", "Drizzle ORM" ] }, { "name": "Databases", "keywords": [ "PostgreSQL", "SQLite", "MongoDB", "DynamoDB" ] }, { "name": "Testing and operations", "keywords": [ "JUnit", "TestNG", "Cypress", "A/B experimentation", "Load and stress testing", "Chaos testing", "Observability", "Grafana" ] }, { "name": "AI engineering", "keywords": [ "Claude Code", "OpenAI Codex", "Claude API", "LLM tooling", "Agentic AI", "MCP server design", "Durable and idempotent workflows", "Human review", "Multi-agent orchestration", "Prompt-caching cost modeling" ] }, { "name": "Technical leadership", "keywords": [ "Architecture and code reviews", "Technical roadmaps", "Cross-team delivery", "Mentoring", "Engineering onboarding" ] } ], "languages": [ { "language": "English", "fluency": "Fluent" }, { "language": "Spanish", "fluency": "Native speaker" } ], "interests": [ { "name": "Bronze Age history", "keywords": [ "Mesopotamia", "Mycenaean Greece", "1177 BC" ] }, { "name": "Art", "keywords": [ "Bosch", "Doré", "Mesopotamian reliefs" ] }, { "name": "Film" } ], "meta": { "canonical": "https://dmanzv.com/resume.json", "version": "2026-09-21", "lastModified": "2026-09-21", "theme": "none", "note": "Machine-readable mirror of https://dmanzv.com/resume/ in the JSON Resume schema. Same content as the HTML page; the HTML page is authoritative." } }