Results-driven Senior QA Lead, AI & Automation Engineer with 17+ years of experience in software quality and strategic delivery. By leveraging AI Engineering (LLMs, Agentic Workflows) and advanced automation, I build scalable frameworks and CI/CD pipelines that elevate product quality, accelerate release cycles and support key business objectives. I architect comprehensive testing strategies for complex Web, Mobile (iOS, Android), Web3, Blockchain and AI-powered systems. As a bilingual (English-Spanish) Computer Science Engineer, I specialize in bridging deep technical validation with Agile execution, mentoring cross-functional teams to achieve excellence.

• Test strategy & QA architecture: Test Planning & Design, regression suites, E2E flows, performance testing, Shift-Left, TDD, BDD, Spec-Driven Development and AI-augmented testing strategies.
• Automation frameworks: Playwright, Cypress, Selenium, Appium, Pytest, Cucumber, REST Assured, Supertest.
• API & integration testing: REST, GraphQL, RESTful APIs, Postman, Swagger, JMeter, k6, Contract Testing.
• Web & backend: TypeScript, JavaScript, Python, Java, Solidity, Rust, Go, Bash, Node.js, React, SQL (MySQL, PostgreSQL), NoSQL, Vector Databases (pgvector, Pinecone).
• Cloud & DevOps: AWS, Azure, GCP, Oracle Cloud, Docker, Kubernetes, Terraform, CI/CD (GitHub Actions, GitLab CI, Jenkins), Datadog, Elasticsearch.
• Blockchain & Web3 QA: Smart contracts, ZK Proofs, DApps and DeFi testing using Hardhat and Foundry for EVM networks (Ethereum, BSC, Polygon), plus dedicated validation for non-EVM ecosystems (Solana, Cardano).
• QA Management: Jira, Confluence, Xray, TestRail, defect triage, reporting, living documentation.
• AI-Augmented QA & Integration: Large Language Models (LLMs), RAG, LangChain, Agentic Workflows, LLMOps, AI Red Teaming, AI Guardrails, MCP, Claude, ChatGPT, Cursor, GitHub Copilot, Antigravity, n8n, AI agents, LLM evaluation, eval-driven development and prompt engineering.
• Leadership & Methodologies: Agile, Scrum, Kanban, remote-first collaboration, stakeholder-friendly reporting.

🧠 Google AI Professional Certificate – Google (Mar 2026)

🏆 Software Testing with Generative AI – Simplilearn (Feb 2026)

🤖 Claude Code in Action – Anthropic (Feb 2026)

📈 Elements of AI for Business – MinnaLearn (Feb 2026)

🗣️ English Certificate (C2 Proficient) – EF SET (Jan 2026)

🔄 Scrum Foundation Professional Certificate – CertiProf (Mar 2022)

• 🌐 Blubird
  Web3 platform helping companies fast-track their transition into crypto and blockchain

• 🛡️ Midnight Network
  Bringing rational privacy to blockchain

• 🚐 RVshare
  The largest RV rental marketplace in the U.S.

• 📶 TELUS
  Major Canadian telecommunications provider

• 🏥 NYU Langone Health
  Hospital associated with New York University

• 🚀 SpecForge AI
  AI-augmented QA platform for spec-driven development and testing, RAG-grounded analysis, eval-driven development and contract validation across Python, Go, Rust and Solidity. Demonstrates FastAPI, Streamlit, pgvector-ready retrieval, promptfoo evaluations, agentic workflows, Hardhat, Foundry, n8n, Docker Compose and GitHub Actions.

• 🐳 qa-api-playwright-bdd
  Playwright API automation framework built with TypeScript, Docker and BDD. Demonstrates containerized test architecture, microservices mocking, contract validation, CI-friendly execution and living documentation.

• 📋 Test Strategy & Risk Assessment (Case Study)
  Comprehensive Test Plan & Bug Report portfolio. Demonstrates strategic planning, risk-based testing, professional defect reporting standards and CI-focused smoke automation using Vitest.

• 🔭 Crossmint-Metaverse
  Playwright & TypeScript automation framework for Web3/Metaverse validation. Demonstrates scalable E2E test architecture and CI-ready design.

• 🎭 playwright
  Playwright E2E Automation Framework with GitHub Actions CI/CD integration. Implements Page Object Model (POM), CI integration, maintainable test architecture and modern UI testing.

• 🧪 cypress-aetherium-e2e
  Cypress E2E suite demonstrating scalable test structure, reusable commands and regression-focused automation patterns.

• 🧱 (Planned) qa-automation-playwright-template
  Opinionated starter template for Playwright-based UI automation (coming soon).

• 🌐 Personal site: yosuancrespo.com
• 💼 LinkedIn: linkedin.com/in/yosuancrespo

• 🏗️ Designing scalable QA architectures for complex systems (FinTech, Blockchain, Web3, DeFi, SaaS, AI-powered applications and other data-driven products).
• 🤖 Building AI Integrations & AI-Augmented Testing using LLMs, RAG, LangChain, Agentic Workflows, LLMOps, LLM Evaluation, AI Red Teaming, AI Guardrails, MCP and automated reasoning.
• ⚡ Test automation frameworks across TypeScript, Python, Java and other stacks (Playwright, Cypress, Selenium, Appium, REST Assured).
• ☁️ Infrastructure & DevOps: Implementing Terraform, Docker, Kubernetes and CI/CD pipelines (AWS, Azure, GCP, OCI).
• 🔐 Web3 Validation: Ensuring security via Smart Contract audits and DApp testing on Ethereum, Solana, Cardano, BSC, among other blockchains.

If you’d like to collaborate on QA automation, AI-Augmented Testing, Agentic Workflows, Web3 or anything around software engineering, feel free to reach out. 👇