Sergio Reis

I am a Senior Software Engineer with extensive experience designing, building, and maintaining scalable, high-performance systems across diverse product environments. Over the course of my career, I have developed strong technical depth alongside an equally strong commitment to business impact, user experience, and cross-functional collaboration. I approach engineering with a holistic mindset—balancing architectural rigor, code quality, and long-term maintainability with the ability to deliver incremental value quickly in fast-moving environments.

My technical background spans modern software development practices, including distributed system design, cloud-native architectures, API development, database optimization, and front-end engineering. I am comfortable working across the stack and frequently serve as a bridge between engineering teams and product or business partners. I enjoy translating complex requirements into elegant, reliable solutions that solve real problems and scale effectively as products grow. As a senior contributor, I place high value on code clarity, testability, and thoughtful abstractions that empower teams to move quickly without sacrificing quality.

Beyond my individual contributions, I excel at elevating the performance of the teams around me. I am proactive in mentoring junior engineers, supporting peer growth, and improving engineering processes through documentation, tooling, and best-practice adoption. I believe the strongest engineering cultures are built on psychological safety, clear communication, and a shared commitment to learning. I bring a steady, pragmatic approach to decision-making and encourage data-driven discussions that align engineering work with business strategy.

I am particularly motivated by challenges involving system modernization, optimizing developer experience, and scaling products during high-growth phases. I thrive in environments where autonomy, ownership, and thoughtful problem-solving are encouraged. Whether I am designing a new service architecture, refining an existing system, or collaborating with product managers to shape requirements, I bring consistency, reliability, and a long-term mindset to the work.

At my core, I am a builder—curious, disciplined, and passionate about creating software that endures. I am always looking for opportunities to contribute to meaningful products, partner with strong teams, and push technical boundaries with practical, user-focused innovations.

I'm skilled in:

• Server-side: Node.js, Express.js, PHP, Ruby on Rails
• Client side: React.js, Vue.js, Angular, Svelte, Javascript, Typescript, coffeScript, ExtJS, Ajax, JQuery, HTML, CSS and Bootstrap.
• Database: MySQL, MongoDB, Firebase, PostgreSQL, SQLite
• CMS: Symfony2, Laravel 5+, Codeigniter, Magento, WordPress, Joomla
• Blockchain: Web3.js, ethers.js, Solidity, Rust
• Unit Testing: Mocha, Chai, Jasmine, Karma.
• Project management: Git, Github, Jira, Trello, Bitbucket, SVN, Heroku, Asana.
• Others: AWS, XML