Filip Defar
Verified Expert in Engineering
Data Visualization Developer
Zagreb, Croatia
Toptal member since May 12, 2014
Filip is a full-stack web developer with a special interest in data visualization. He has several years of professional experience working remotely on large-scale applications and building MVPs. Filip has built data visualization dashboards used by the government of Saudi Arabia, refactored and saved de-railed web applications, and helped with developing the Toptal platform you are currently using.
Portfolio
Experience
Availability
Preferred Environment
Git, Visual Studio Code (VS Code), Linux, Windows Subsystem for Linux (WSL)
The most amazing...
...work experience I've had was helping build Toptal's talent platform in collaboration with a team of over 100 remote developers.
Work Experience
Front-end Developer
Captario AB
- Consulted with the client on best practices regarding developing interactive data visualizations with D3.js and React.
- Refactored existing front-end data visualization code and added new features, such as "brush and zoom," to existing visualizations.
- Built new data visualizations, working across full-stack, and developing custom interactive front-end within React ecosystem. Prepared and cleaned large datasets on the back end with Python and pandas.
- Worked with the design team on maintaining and developing the UI surrounding the data visualization dashboards.
Full-stack Developer
Samedi
- Led the technical side of a web portal redesign, ensuring CSS/HTML code follows best practices.
- Gave feedback on designs and helped improve technical UI issues as well as UX issues.
- Spearheaded the integration of PayPal payments API into an existing React application with a Ruby on Rails back end.
- Reworked an existing React application to use SEO-friendly URLs.
- Worked on fixing cross-client rendering issues in HTML email templates.
UI Developer
African Budget Safaris
- Built a web application for searching and dynamic filtering of safari tours. This application is the core of the new (unreleased) website. It uses the Vue.js framework for the front end and communicates with Google Cloud Functions API.
- Created a simple webpack configuration to use modern JavaScript while retaining compatibility with legacy browsers.
- Worked with the client on fixing various layout (CSS/HTML) issues across the new website.
Front-end Developer
AlignAlytics
- Implemented a customizable SVG-based multi-column visualization for comparing data in various forms, including text, lists, bar charts, and heat maps.
- Created a value chain visualization for a client company.
- Built a CLI for synchronizing code between the local development environment and the Alytic.io web service.
- Developed a generic radar chart template to be used as part of the Alytic.io platform.
- Designed and created a custom chart showing relationships between three datasets.
- Created several variations of interactive tree chart visualizations.
Front-end Developer
Wasphi
- Created a set of reusable React and D3.js visualization components for basic charts.
- Built several custom non-standard chart components with D3.js.
- Helped design and build a dashboard allowing data exploration of Saudi workers abroad.
- Designed and built a dashboard that allows the data exploration of average student grades in various educational institutions.
- Created a dashboard showing Saudi labor market trends.
Front-end Developer
Dekunu Technologies
- Built an interactive visualization dashboard with positional data collected from skydivers during jumps.
- Developed an algorithm to clean up spotty GPS data.
- Developed an algorithm for detecting moments when the skydiver exited the plane, opened the parachute, and landed.
Ruby Developer
Toptal
- Worked in a team of over 100 developers on maintaining the very platform you are using right now.
- Led the development of the Top Scheduler application used for scheduling meetings with Toptal clients.
- Continuously worked with PMs on directing the product and making sure code deliveries are made on time.
- Acted as an Agile coach for our team, making sure our Kanban-based process is running smoothly.
Back-end Ruby Developer
DirectVest (via Toptal)
- Created an API wrapper for a folio institutional service.
- Constructed a full test suite for existing features.
- Refactored the application (From 1.5 to 3.9+ GPA on CodeClimate).
- Implemented multistep forms for the investment process.
- Built a dashboard that heavily relies on external APIs as well as low-level caching for increased performance.
Full-stack Ruby/JavaScript Developer
BizRevr (via Toptal)
- Helped design and develop new features.
- Created an interface for bulk editing records similar to an Excel spreadsheet.
Full-stack Ruby/JavaScript Developer
ThinkCERCA (via Toptal)
- Created a one-page JavaScript application for assigning lessons to students.
- Maintained, improved, and added new features to existing Ruby on Rails and Ember.js code.
Back-end Ruby Developer
CampWire
- Created a working payments system.
- Improved old core features and created new ones.
- Introduced new developers to the application.
- Wrote a full test suite for the application.
Back-end Ruby Developer
Whitespectre
- Developed a web service for creating mobile application presentations.
- Created a web application test suite using RSpec.
Experience
My Codepen Account
https://codepen.io/dabroriusRotten Unicorns Website
https://rottenunicorns.com/I used Sketch for prototyping and Affinity Designer for logo design. The website was built with HTML5, SCSS, and Webpack and deployed to GitHub Pages.
My Blog
http://filipdefar.com/Education
Master's Degree in Computer Science
University of Zagreb - Zagreb, Croatia
Bachelor's Degree in Software Design
University of Zagreb - Zagreb, Croatia
Skills
Libraries/APIs
React.js, D3.js, jQuery, Vue.js, Liquid, Pandas, Three.js, Node.js
Tools
Git, Webpack, Affinity Designer
Languages
HTML, CSS, JavaScript, Ruby, TypeScript, Python, CoffeeScript
Frameworks
Ruby on Rails, Ember.js, Redux, Jest
Paradigms
Object-oriented Programming, Agile Development, Agile Development, Object-oriented Design (OOD), Unit Testing
Platforms
Visual Studio Development, Heroku, Linux, Shopify
Storage
PostgreSQL
Other
Data Visualization, UI Development, Visx, Windows Subsystem for Linux (WSL), Computer Science, Software Design, Shopify Theme, UI Development, Dashboard
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