Susana Casasola

Experience

Software Engineer @ Flink

Berlin, Germany (Aug 2025 – Present)

• Led technical implementation of a restocking priority system using High/Medium/Low signals to reduce stockouts.
• Led technical implementation of a supplier returns flow that saved at least 30 minutes per shift, plus a reusable image-upload Design System component, ready to be reused in future features.
• Led the team's Design System, improving documentation, consistency, removing duplication and closely collaborating with Designer.
• Developed multiple end to end experiences for a web app used in 160+ hubs, contributing to the API definition and implementing the visual / interactive part.

Senior Frontend Engineer @ Getsafe

Berlin, Germany (Oct 2024 – Jun 2025)

• Built activation focused features for the React Native app, including incentive flows and questionnaires / calculators, resulting in improved activation metrics.
• Improved team velocity by launching features via CMS-driven configuration.
• Helped improve frontend architecture and Design System consistency across mobile and web.

Senior Frontend Engineer @ Semrush

Berlin, Germany (Oct 2023 – Sep 2024)

• Built multiple frontend features for enterprise insight boards, displaying AI structured data with tables and charts for SEO, brand, and digital marketing insights.
• Built real time analysis feature for a plagiarism detection tool in a text content editor, showing feedback and sources to clients to avoid bad SEO for internet repeated content.

Senior Frontend Engineer @ Homeday

Berlin, Germany (Sep 2021 – Sep 2023)

• Developed frontend features across multiple internal and external products using Vue.
• Led the design system project by facilitating sync meetings / feedback workshops and defining doc standards.
• Ran WCAG and frontend performance audits on main website and internal products, defining a backlog for deeper remediation.
• Mentored engineers in accessibility, React, CSS, and performance best practices.

Full Stack Engineer @ Joggo (now Summari)

Mexico City, Mexico (Mar 2021 – Aug 2021)

• Early engineering team member, built multiple product features, including first mobile version of the web app.
• Setup testing infrastructure for web app, using Cypress and testing-library.
• Developed end to end Twitter-thread ingestion workflow, from API definition to frontend display.

Frontend Engineer @ Nubank

Mexico City, Mexico (Feb 2020 – Jan 2021)

• Built marketing / acquisition websites for Mexico and Colombia, priorityzing load performance and test coverage.
• Built the frontend architecture for A/B experiments, speeding up test setup and helping drive conversion gains up to 3%.
• Conducted an accessibility assessment on both websites, implemented key fixes,
  established automated CI audits to ensure ongoing compliance and created a structured roadmap for continous improvement.

Full Stack Engineer @ Beek

Mexico City, Mexico (Oct 2018 – Jan 2020)

• Built the React Native mobile app from scratch, laying the grounds for more (and faster to develop) features.
• Made retention / acquisition growth experiments (pricing placement, annual vs. monthly plans, personalized recommendations) with up to 2% conversion uplift.
• Developed end to end features for both mobile and web experiences, from database and API design to frontend implementation.

Earlier Experience

Frontend Developer @ KarmaPulse

Mexico City (Sep 2016 – Sep 2018)

• Led frontend implementation for CMS-configurable insights / engagement boards.
• Developed frontend features for social media analytics platforms.

Junior Frontend Developer @ UnoTV + Claro Sports

Mexico City (Apr 2015 – Aug 2016)

• Maintained high traffic media websites for news and livestream events.
• Developed frontend widgets and websites for the Olympics / Paralympics 2016.