B2B SaaS platform for the fashion manufacturing industry — 100+ clients and thousands of users across Latin America. Technical reference and lead engineer for a 5-person development team, owning architecture decisions, code quality standards, and the technical roadmap. Designed and built a custom Claude plugin using the Model Context Protocol (MCP), extending LLM capabilities into internal development tooling and integrating Claude into the team's day-to-day code review, refactoring, and pair-programming workflow. Led the platform-wide migration from Angular 12 to Angular 18, modernizing the frontend stack, eliminating deprecated patterns, and unlocking new framework capabilities — delivered with zero downtime. Refactored a critical performance bottleneck, reducing page payload from 200MB to under 1MB (>99% reduction) and dramatically improving load time and user experience. Drive engineering excellence through code review on all team PRs, mentoring mid and junior developers, and defining coding standards and architectural patterns across the codebase. Lead technical hiring — conducted interviews and personally hired 4 engineers currently active on the team — and own onboarding for new joiners. Make architecture and technology decisions for new features, balancing delivery speed, maintainability, and scalability. Stack: C#,.NET Core, [contact hidden] Core, Angular (12? 18), TypeScript, RxJS, SQL Server, REST APIs, Git, Claude API, MCP