Alejandra Valencia

Senior Frontend Engineer with 11+ years of experience building complex web applications for US-based companies, working remotely from Colombia. I've worked across enterprise security platforms, AI-powered interfaces, and e-commerce.Most of my career has been at Anomali, a cybersecurity company, where I grew from executing features to leading technical decisions on some of the most critical projects on the platform.A few examples of what that looks like in practice:- Copilot AI interface: I was the sole frontend engineer on the project. I defined the technical approach, presented solutions directly to the PM and tech lead, and worked across backend and data science to determine what was feasible and how to surface AI capabilities in a way that was actually useful to end users.- Platform modernization: Led a team through 30% of a full AngularJS to React/TypeScript migration, managing technical debt from a legacy codebase built on years of outdated dependencies, while keeping production stable throughout.- Security hardening: Audited and replaced 35+ risky npm dependencies and identified and resolved 200+ frontend vulnerabilities using CodeQL and Claude AI, bringing the open issue count from 200+ to zero.- Browser extension ownership: Owned a cross-browser corporate security extension (Chrome, Firefox, Edge) with 2,000+ active users, maintaining feature parity and real-time threat detection across browser updates.- Testing infrastructure: Built E2E testing from scratch using Cypress and Playwright, covering critical flows on a security-sensitive product.Before Anomali, I worked with US-based clients on Shopify storefronts and WordPress platforms, including a client relationship that lasted 9+ years, covering the full project lifecycle from scoping to production support.I have experience in both startup and enterprise environments, and I move between them without much adjustment.Stack: React, TypeScript, AngularJS, Cypress, Playwright, Webpack, Docker, D3.js, Next.js, REST APIsMy most recent project with Anomali wrapped up successfully on April after almost 8 years. I'm immediately available for new opportunities. Open to Senior Frontend and Frontend Lead roles. Prefer remote, open to on-site in Medellín for the right opportunity.