Senior Software Engineer
2017 - 2020Xing- Ensured GDPR compliance.
- Migrated some services from Ruby on Rails 4 to Ruby on Rails 5.
- Added image and video updates for company profiles.
- Integrated company profiles into the company's iOS app via WebViews.
- Improved the user experience of recruiter tools by allowing them to perform bulk actions on candidates.
Technologies: Ruby on Rails, React, MySQL, Git, Minitest, RSpec, Jest, Capybara, Cypress, JavaScriptSenior Software Engineer
2017 - 2017Novicap- Migrated the accounting system to a new double-entry system.
- Improved the GitFlow and code-review culture in the company.
Technologies: Ruby on Rails, React, Redux, PostgreSQL, Git, AWS, Heroku, RSpecConsultant
2017 - 2017MovingWorlds- Maintained the platform at a point where no developers had been working on it for months.
- Optimized back-end admin panels to accommodate the platform activity.
- Fixed critical bugs that were disrupting the operations team and the users.
- Hired and onboarded a long-term maintainer for the platform.
Technologies: Node.js, PostgreSQL, AWS, HTML, CSS, GitSoftware Engineer
2014 - 2017Seedrs- Worked on financial reconciliation mechanisms with credit card payments and currency transfers.
- Implemented a site-wide responsive redesign.
- Built legal compliance mechanisms.
- Contributed to the development of a platform for the operations team to review crowdfunding pitches sentence by sentence.
- Created a dashboard for entrepreneurs to manage their crowdfunding campaigns.
Technologies: Ruby on Rails, RSpec, Cucumber, Ember.js, MySQL, MongoDB, Haml, Sass, jQuery, Javascript, Git
Joao da Silva Fernandes
Software Developer in Barcelona, Spain
Member since July 16, 2019
João is a full-stack developer focused on Ruby on Rails who also delves into the front end (with React lately) and infrastructure. He started his career mainly working in startup environments until 2017 when he joined Xing, Germany's most active professional network platform. João strives for long-term maintainability through code quality and a proper delivery process where testing, code reviews, and commit history are prioritized.
Joao is now available for hire
Portfolio
- XingRuby on Rails, React, MySQL, Git, Minitest, RSpec, Jest, Capybara, Cypress...
- NovicapRuby on Rails, React, Redux, PostgreSQL, Git, AWS, Heroku, RSpec
- MovingWorldsNode.js, PostgreSQL, AWS, HTML, CSS, Git
Experience
- Git, 6 years
- Ruby, 5 years
- Testing, 5 years
- Agile, 5 years
- JavaScript, 5 years
- Continuous Delivery (CD), 3 years
- React, 2 years
Availability
Part-time
Preferred Environment
Git, Visual Studio Code, Ruby on Rails, React
The most amazing...
...feeling of value I've had was introducing a testing culture to a group of front-end developers and seeing the confidence in our code increase.
Employment
Experience
- Testimonials Page for Alto Pharmacy (Development)https://alto.com/reviews
I collaborated with the design agency, Saint Friend, to implement the testimonials page for Alto Pharmacy. Saint Friend provided the designs for large and small screens, and I implemented them while suggesting solutions for corner cases not contemplated in the designs.
Technologies: Jekyll, Sass, HTML, JavaScript, jQuery - Framework to Navigate Web Pages Using the Microsoft Kinect (Development)
As part of my master's thesis, I created a C# application that connects to the browser via sockets and sends data from Microsoft Kinect. I then developed a JavaScript framework to allow for user interaction based on motion events. These interactions included pressing buttons, scrolling through the page, image and PDF interactions (pitching, zoom, and rotation), and video interactions.
- Site-wide Responsive Redesign (Development)http://www.seedrs.com/invest
The current Seedrs' look and feel was introduced in 2015 as part of a responsive redesign that was rolled out on a per-page basis. The pages that I worked on include the investment opportunities page and the how-to-invest page.
Technologies: Haml, Sass, jQuery - Rails 5 Upgrade (Development)https://www.xing.com/companies
I led the Rails 5 upgrade of the company profiles section of Xing. It was a ten-year-old legacy project and required exhaustive controller test refactoring, dependency updates, and removal of legacy mass assignment code from Rails 3.
- Head of the Program for Portugal's National Conference of IT Students (ENEI 2013) (Other amazing things)
In 2012, I was invited to take ownership of the program for 2013's ENEI. This project involved choosing, contacting, and scheduling speakers on topics such as information security (infosec), internet of things (IoT), web development, and mobile computing. The attendance forecast was of 300 attendees. However, we ended up having 600 attendees, which led to a last-minute expansion of the program.
- Talk | Mob Programming to Deliver Better Software (Other amazing things)https://github.com/PixelsCamp/talks/blob/master/2019/mob-programming_joao-fernandes.md
I gave a talk at Pixels Camp 2019 on how to use mob programming to deliver more maintainable code with fewer defects. This practice reduces the back-and-forth actions in code review processes by having the team collaborate in a disciplined manner and providing feedback in real-time before the code gets to the code review step.
Skills
Languages
Ruby, JavaScript, CSS, HTML, Sass, HamlFrameworks
Ruby on Rails (RoR), minitest, Jest, Ember.js, Cypress.io, CapybaraTools
Git, GitHub, RSpec, Graylog, Sentry, GitLab, Bitbucket, JenkinsLibraries/APIs
React, jQuery, Node.js, Marionette.jsParadigms
Agile, Scrum, Kanban, Object-oriented Programming (OOP), Testing, Pair Programming, Mob Programming, Continuous Deployment, Continuous Delivery (CD), Continuous Integration (CI), REST, Functional ProgrammingPlatforms
Heroku, Docker, Kubernetes, Mixpanel, UnixStorage
PostgreSQL, MySQL, MongoDBOther
Domain-driven Design (DDD), Analytics, Responsive UI
Education
- Master's degree in Software Engineering2009 - 2014University of Porto, Faculty of Engineering - Porto, Portugal
