Chaya E.

Responsibilities:

• Designed, implemented, and maintained a PostgreSQL database, including schema design and versioned migrations using Alembic, ensuring data consistency and safe evolution of the system over time.

• Developed the UI Tester microservice as part of the Quinn MCP Testing Platform using Python, FastMCP, FastAPI.

  The service executes real browser-based UI tests via Playwright MCP, driven by natural-language test scenarios rather than traditional test scripts.

• Built agent-driven orchestration flows using LangChain and LangFlow, enabling multiple specialized agents to collaborate on complex testing tasks such as site mapping, step generation, and test execution.

• Integrated Large Language Models using advanced prompt-engineering techniques to transform high-level, human-readable test descriptions into structured, deterministic test steps executed by Playwright MCP.

• Implemented asynchronous task coordination between multiple microservices, ensuring reliable execution, clear responsibility boundaries, and scalable test flows.

• Designed the system to produce artifact-rich outputs, including screenshots, DOM snapshots, and structured logs, enabling reproducible runs and easier debugging.

• Worked in an Agile team environment, using Docker for containerization and Git for version control and collaboration across distributed services.