Hey! I'm Sergio, Senior Platform Frontend Engineer.

At MrQ, a UK-based online entertainment platform, I lead frontend platform work across multiple product tribes. Key contributions:

• Defined and established frontend architecture standards across multiple tribes (15+ engineers), improving code reuse and deployment consistency.
• Built and maintained shared component libraries and tooling to accelerate development across product teams.
• Drove adoption of testing best practices with Jest, Cypress, and Detox, reducing production incidents and improving release confidence.
• Mentored engineers and led cross-team workshops to align on performance targets and frontend best practices.

At RELEX, I maintained and enhanced the Workforce Management (WFM) system. Key contributions:

• Built the backend of the system using Elixir with Phoenix framework.
• Developed microservices in NodeJS to enhance system functionality.
• Designed and implemented frontend applications using React and Redux for improved user experience.

Collaborated with Blueprint Genetics to develop new products and testing capabilities for their Nucleus system:

• Designed and implemented a frontend system using React connected to PHP and Golang backends.
• Introduced new integration tests using Robot framework and enhanced unit testing for all components.
• Successfully delivered new panels and products on time to meet client needs.
• Provided expertise in release planning and offered valuable recommendations for process improvement.

Led a full-stack development project as the main contact, using NodeJs, React, and AWS in a high-speed production setting:

• Created private RESTful APIs with Koa.js and TypeScript to consolidate training services data from various origins.
• Guaranteed smooth communication between front-end and back-end parts, extensively testing features with Vitest.
• Applied Scrum methodologies to produce a functional, well-documented application under a strict timeline.
• Recognized by client for outstanding communication and meeting project objectives effectively.

Led front-end development in a fast-paced HR startup environment. Key contributions:

• Streamlined frontend architecture to boost development efficiency and application performance.
• Developed custom reusable components with the Design team to enhance consistency and user experience.
• Built RESTful APIs with Node.js, Express.js, and ElasticSearch to enhance front-end and back-end communication.
• Ensured application reliability through comprehensive testing using Jest and Cypress.
• Engaged in client meetings to communicate project progress and collect feedback for continuous enhancements.