Daniel Araujo
Verified Expert in Engineering
Full Stack Developer
Porto, Portugal
Toptal member since September 1, 2019
Daniel is an engineer experienced in the development of large-scale web products. He is a test-driven development advocate and lover of reliable, highly-scalable, and performant software solutions. As a person and developer, Daniel is self-motivated, eager to learn, and happy to collaborate and provide solutions.
Portfolio
Experience
- Functional Programming - 6 years
- Web Development - 5 years
- Testing - 5 years
- JavaScript - 5 years
- Node.js - 4 years
- REST APIs - 3 years
- React - 3 years
- RESTful Development - 3 years
Availability
Preferred Environment
MacOS, Git, Visual Studio Code (VS Code)
The most amazing...
...piece of software that I've developed was a real-time machine learning web application that determined the emotion of the user based on camera input.
Work Experience
Front-end Engineer
NumberAI (via Toptal)
- Built the Eatmoji Menu Builder (a dynamic restaurant menu builder) using React. This product helped save the support team hundreds of hours from the first week it was launched.
- Shipped end-to-end features in React, React Native, and Python in NumberAI's production codebase.
- Helped bring a lot of visual polish to NumberAI's apps.
- Developed several end-to-end tests using Cypress, in addition to unit and integration tests.
Full-stack Engineer
Paddy Power Betfair
- Maintained and modernized a legacy web and mobile application.
- Developed betting features for both mobile and desktop web applications.
- Configured different deployment environments using Jenkins for CI and Chef.
- Developed Node.js services (back end for front end).
- Built betting features for a mobile sportsbook Betfair application.
Back-end Engineer
Feedzai
- Worked for Feedzai, which provides near real-time machine learning through a multithreaded, distributed and fault-tolerant system.
- Worked on the leading product engineering team which developed cutting edge features of the real-time data processing and machine learning on the in-house engine.
- Developed a PCI-compliant credit card storage engine.
Full-stack Engineer
Paddy Power Betfair
- Worked in a large-scale web product using Scrum.
- Developed E2E tests using Protractor.
- Used Jenkins for CI and Chef for configuring different deployment environments.
- Worked as part of a cross-product team that developed a core business reusable component.
- Developed Node.js services (back end for front end).
- Developed betting features both for mobile and desktop web applications.
Software Engineer | Researcher
Performetric
- Worked for Performetric: a real-time monitoring system that allows the management of mental fatigue in a noninvasive way. At the time Performetric was already backed by scientific knowledge and was developing a scalable product.
- Architected, designed, and implemented the data processing engine. In particular, focusing on data ingestion, batch processing, and real-time analytics.
- Published two scientific papers.
Contractor
ACICE Esposende’s Commercial Union
- Developed an API for interaction with ACICE’s database (using Laravel).
- Designed and implemented a hybrid mobile app using Ionic and AngularJS.
Software Developer
Spinque
- Developed some modules for interaction with Twitter and LinkedIn web APIs.
- Designed and implemented indexers and search strategies using the Spinque engine.
- Implemented a mobile web app for navigation on the aggregated content using AngularJS.
- Researched the possibility of using Spinque search strategies and user contextual data in order to improve the UX.
Web Developer
Freelance Work
- Developed for the web on behalf of a client in the domain of transportation.
Undergraduate Researcher
CCTC | Computer Science and Technology Center
- Worked as a junior researcher on an evolutionary algorithms library.
- Built, with guidance, a graphical user interface (GUI) for executing and fine-tuning a runtime set of configurations; at the time was guided by a professor and a PhD student.
Experience
Apartment Rental Management Application
The application allows third-party authentication and role-based authorization. The set of functionalities encompassed user management, apartment management, and searches (via attributes and via geolocation on a map).
Education
Master's Degree in Computer Engineering
Minho University - Braga, Portugal
Earned Credits as an Exchange Student towards a Master's Degree in Software Engineering
Universiteit van Amsterdam - Amsterdam, Netherlands
Bachelor's Degree in Computer Engineering
Minho University - Braga, Portugal
Skills
Libraries/APIs
React, REST APIs, Node.js, jQuery, RxJS, Guava
Tools
Git, Mocha, Figma, Java Concurrency, Postman, Docker Compose, Jenkins, Webpack, Chef, Mongoose, Apache ZooKeeper
Languages
JavaScript, ECMAScript (ES6), Scala, CSS, HTML, Java, Python, Ruby, TypeScript, SQL, Haskell
Frameworks
Express.js, AngularJS, Redux, Material UI, Bootstrap, Swing, Ionic, JMH, React Native, Cypress, Next.js, Ruby on Rails (RoR), Spring Boot, Protractor, Angular, Jest, Guice, Laravel
Paradigms
RESTful Development, Functional Programming, Testing
Platforms
MacOS, X (formerly Twitter), Linux, Docker, Heroku, Visual Studio Code (VS Code)
Storage
MongoDB, JSON, Redis, PostgreSQL
Other
Web Development, Storybook, Computer Engineering, Software Engineering, Enzyme, Algorithms, TypeORM, Machine Learning, ETL Development
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