Angelino O.

Angelino O.

Senior Software Engineer

Sorocaba, Brazil
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About Me

Angelino is a Senior Front-end Developer with 6+ years of experience building and maintaining responsive websites in multiple sectors. He uses his expertise in JavaScript, React.js, TypeScript, Next.js, API integration, and modern libraries and frameworks to craft exceptional digital experiences and deliver high-performance web applications. Angelino architects scalable and maintainable front-end solutions to solve complex business challenges, while also leading teams, mentoring junior developers, and managing complex projects from inception to completion. He also has a working knowledge of CI/CD pipelines and a keen interest in usability and reusable components.

Work history

UpStack
UpStack
Senior Front-end Developer
2022 - Present (3 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participating in scrums consisting of cross-functional teams, both software and hardware.

  • Ensuring that features are being delivered efficiently and on time.

Turing
Turing
Senior Software Engineer
2023 - Present (2 years)
Remote
  • Driving user acquisition and revenue growth by optimizing the core user journey, focused on A/B testing and iterative improvements to the platform's top-funnel actions including buying, selling, depositing, and withdrawing cryptocurrencies.

  • Developing and executing A/B tests to identify and implement high-impact UI/UX optimizations.

  • Contributing to the development and maintenance of a robust GraphQL API for efficient data fetching.

Natoora
Natoora
Senior Software Engineer
2022 - 2023 (1 year)
Remote
  • Led the front-end development of a critical warehouse management system for Natoora, a high-end greengrocer operating across multiple countries.

  • Successfully delivered a new feature enabling efficient online stock movements, reducing manual errors by 30% and increasing warehouse productivity by 20%.

  • Modernized the tech stack by refactoring and migrating legacy Angular.js components to React, enhancing code maintainability and developer productivity.

  • Implemented robust unit testing and code documentation, increasing test coverage from 0% to 75% and establishing a foundation for long-term code quality.

  • Introduced innovative engineering patterns such as React Hooks and Context API to streamline development processes and improve code efficiency, resulting in 25% faster development cycles.

  • Overcame challenges with legacy code by adopting a phased migration approach and providing thorough training for the team.

Planetary
Planetary
Senior Software Enginner
2022 - 2024 (2 years)
Remote
  • Spearheaded the technical execution of complete website rebuilds for NTOP (ntop.com) and Burlington (burlington.com).

  • Implemented a scalable and performant tech stack (React, Next.js, TypeScript, Tailwind CSS, and Sanity CMS), ensuring long-term maintainability and growth potential.

  • Collaborated closely with designers to translate their vision into a user-centric and future-proof web experience.

ConsumerAffairs
ConsumerAffairs
Senior Software Engineer
2021 - 2022 (1 year)
Remote
  • Championed a data-driven approach by implementing A/B tests for UI/UX changes on product pages.

  • A/B tested a new CTA button design, resulting in a 15% increase in user click-through rate.

  • Elevated code quality across the organization by raising the bar for unit test coverage.

  • Increased client-side unit test coverage from 50% to 80%, improving code maintainability and reducing regressions.

  • Streamlined engineering processes through improved documentation like creating detailed code comments and comprehensive API documentation.

Ripio (via Turing)
Ripio (via Turing)
Mid-senior Software Engineer
2021 - 2022 (1 year)
Remote
  • Spearheaded the development of Ripio Data, a groundbreaking Blockchain transaction explorer within a lean startup environment, and led a team of one back-end developer alongside the CEO as Product Owner.

  • Delivered a high-performing and user-centric MVP two weeks ahead of schedule using React.js, Next.js, and Web Vitals optimization to ensure a 20% faster loading time and a 15% improvement in Core Web Vitals scores for mobile users.

  • Championed a data-driven approach to continuous improvement using Google Analytics and Hotjar to identify areas for performance optimization.

  • A/B tested various approaches using tools like Optimizely, resulting in significant improvements like enhanced Google rankings for relevant crypto-related searches by 5 positions.

  • Reduced page load times for transaction details by 3 seconds and improved user engagement on mobile by 10% through optimized UI elements.

Gamers Club
Gamers Club
Mid-senior Software Engineer
2019 - 2021 (2 years)
Remote
  • Owned the entire lifecycle of the Tournament feature, from MVP release to ongoing improvements.

  • Successfully integrated APIs for popular games like Free Fire, League of Legends, and Valorant, ensuring seamless user interaction.

  • Involved in data-driven decision-making, analyzing user data to identify key areas for improvement and driving user acquisition and engagement.

Portfolio

ConsumerAffairs - Mortgage Lenders
ConsumerAffairs - Mortgage Lenders

ConsumerAffairs is a rapidly growing online marketplace where each month millions of consumers research purchases, connect with brands, transact, write reviews, and stay up to date with important consumer news. Worked in a few different teams for this project, having different goals, leading to an improvement in engineering processes and documentation. Technologies: HTML5 · CSS3 · JavaScript · Front-end Development · SCSS · React.js · Jest · React-testing-library · Django · Jinja · Web Development · Git · Docker · Webpack.

Gamers Club - Multigaming
Gamers Club - Multigaming

Gamers Club is the largest CS:GO club in the world. The platform has the largest base of active players in Latin America and through it, we connect and foster the scenario with content, training, championships, awards, broadcasts, and announcements. The platform allows users to pay a monthly fee and have access to various features and benefits.

Data Ripio
Data Ripio

Ripio Coin is one of the biggest crypto-platforms in Latin America. The wallet can be used to buy Bitcoin, Ethereum, and other coins. It is a Bitcoin consumer financial service platform that has simplified the peer-to-peer payment system in a way that is accessible to anyone with a smartphone.

Education

Technologist, Analysis and System Development
Technologist, Analysis and System Development
Sorocaba Technological College (FATEC) - Brazil
2017 - 2021 (4 years)