JULIO CASTRO

• Led the frontend of a tribe of 25+ engineers, driving, promoting and supporting the adoption of best practices and cutting-edge technologies.
• Introduced numerous improvements with a direct impact on daily operations: reduced pipeline time by half, developed a tool that cut several hours of manual work to just 1 click, among others.
• Mentored up to 5 new colleagues and contributed to improving onboarding processes, reducing on average by two weeks the time in which a new member became a regular contributor.
• Played a crucial role in making both frontend and backend architectural decisions, achieved a massive reduction in the complexity of critical business features, allowing related tasks that had weeks of estimation to be released to production within a day.
• Skills: TypeScript, Angular, Java, Spring Boot, Domain Driven Design, Bitbucket.

• Led, built and maintained the backend and most of the entire infrastructure, achieved a successful migration and launch, returning a +50% increase in users and also new project signings and extensions with the customer.
• Migrated the complex pet feeding algorithm to an efficient, easy-to-read and extend solution, which was even reused in another similar product for the UK.
• Contributed and collaborated closely with the frontend team, achieving record delivery performance in the company, even reaching to release features in production within minutes.
• Actively participated and led weekly company conferences, sharing and teaching on a multitude of topics, achieving a direct positive impact on 5+ different projects.
• Skills: TypeScript, React, Nextjs, Domain Driven Design, Nodejs, PostgreSQL, AWS, GitHub.

• Led the upgrade of the micro-frontend dedicated to bank transfers, removing thousands of lines of legacy code and reducing related story point estimates by 80%.
• Became the go-to person for technical questions from both business and development.
• Skills: TypeScript, React, Micro-frontends, Redux, Bitbucket.

• Integrated microservices in a 300+ engineers project focused on Santander's international payment system, achieving goals despite 5+ constraints while maintaining high-quality standards.
• Implemented deployment support tool, reducing human errors by 80%.
• Skills: Java, Spring Boot, Kafka, Bitbucket, Microsoft Azure.

• Participated in development tasks for a hybrid mobile application for Santander UK, outstanding with 50% above average delivery performance.
• Implemented the most critical algorithm for user experience: the credit card refresh logic. Initially estimated in one week and delivered a robust and easy-to-maintain solution within a day.
• Skills: TypeScript, Angular, Ionic, GitLab.

• Automated the end-to-end regression tests of 4 hybrid mobile applications focused on the banking sector, resulting in a reduction from 2 weeks of manual work to 10 minutes of automatic execution, a milestone achieved for the first time in the team and in the whole company.
• Obtained the opportunity to work in the development team due to excellent performance, business knowledge and problem-solving skills.
• Skills: Java, Selenium, Appium, GitLab.

Mathematics and Computer Science.

• Achieved an average score of 9/10.
• Awarded academic excellence on behalf of Madrid city.