Matej Bilić, Developer in Bošnjaci, Croatia
Matej is available for hire
Hire Matej

Matej Bilić

Verified Expert  in Engineering

Bio

Matej is a talented full-stack web developer and mobile application developer adept at advanced web and application development stages. He is knowledgeable in a variety of technologies, including React, React Native, Firebase, Express, Django, and many others. Matej can effectively self-manage while working on independent projects, as well as collaborate in a team setting.

Portfolio

Bicycle
JavaScript, TypeScript, React, Data Visualization, Web Applications, SaaS...
Legion Health, Inc.
Node.js, Stripe, API Integration, APIs, Digital Payments, REST APIs, GraphQL...
Veza (via Toptal)
TypeScript, JavaScript, JavaScript Testing, Jira, GitHub, Data Sourcing...

Experience

  • TypeScript - 5 years
  • PostgreSQL - 5 years
  • React - 5 years
  • React Native - 3 years
  • REST APIs - 3 years
  • GraphQL - 2 years
  • Firebase - 2 years
  • Django - 2 years

Availability

Part-time

Preferred Environment

Windows, Ubuntu, Vim Text Editor, Visual Studio Code (VS Code), MacOS

The most amazing...

...things I’ve developed are a website and an application for a company that creates adventures in various cities, which supersede tourist guides.

Work Experience

Full-stack Engineer

2022 - 2023
Bicycle
  • Specialized in data visualization and worked with big data as a front-end developer.
  • Leveraged expertise in Apollo GraphQL, React, and REST API to create insightful charts for clients that improved optimization and reduced loading times.
  • Developed complex visualizations, including tree diagrams and Sankey diagrams, to help clients better understand their big data sets.
  • Provided valuable insights that drove business decisions and improved client outcomes.
  • Contributed to a team environment focused on collaboration, innovation, and excellence in client service.
Technologies: JavaScript, TypeScript, React, Data Visualization, Web Applications, SaaS, D3.js, Big Data, Large Scale Distributed Systems, Node.js, React Native, Full-stack, Visualization, Visualization Tools, API Development, APIs, Material UI, Charts, Application State Management

Back-end Engineer

2022 - 2022
Legion Health, Inc.
  • Developed the back-end to implement payouts using Stripe, significantly reducing the time it takes to pay the users.
  • Automated payments by creating a GraphQL endpoint that automatically calculates the amount owed to the user and pays them.
  • Worked both within a team and independently to achieve the client's goals.
  • Communicated effectively with team members to plan out the database structure and to achieve the optimal solution for automated payouts.
  • Ensured the endpoint, payouts, and transactions were safe and secure.
Technologies: Node.js, Stripe, API Integration, APIs, Digital Payments, REST APIs, GraphQL, Apollo, React Apollo, Apollo Server, Prisma, PostgreSQL, JSON, Bug Fixes, Code Review, REST, Collaboration, Real-time Data, Databases, Marketplace Platforms, B2B, SaaS, Web Development, Figma, Web Dashboards, Online Payments, Web Applications, API Development, Webhooks, Application State Management

QA Automation Engineer

2021 - 2022
Veza (via Toptal)
  • Designed and implemented automated tests and scripts using Cypress.
  • Caught numerous errors in every PR before they got merged with the main branch.
  • Migrated previously existing tests from Nightwatch.js to Cypress.
Technologies: TypeScript, JavaScript, JavaScript Testing, Jira, GitHub, Data Sourcing, Web Security, Asynchronous Data Streams, Cypress, Nightwatch.js, Testing, UI Testing, QA Testing, Automation, UI Automation, QA Automation, Test Automation, Docker, Jest, API Integration, REST APIs, JSON, Bug Fixes, Code Review, REST, Collaboration, Real-time Data, SaaS, Web Development, Cloud Storage, Automated Testing, Amazon Web Services (AWS), Azure, Puppeteer, Chromium, Web Dashboards, Cloud Platforms, Web Applications, Big Data, Data Visualization, Visualization, Visualization Tools, Application State Management

Freelance Full-stack Developer

2019 - 2021
An Online Freelance Agency
  • Worked efficiently and organized work to complete assignments on time.
  • Troubleshot and remediated web applications efficiently.
  • Integrated databases, authentication, and data storage to web applications.
  • Developed, tested, deployed, and maintained web applications.
  • Utilized the latest web technologies to solve complex problems.
  • Improved the user experience through web applications by designing and modifying existing user interfaces.
Technologies: React, React Native, JavaScript, TypeScript, HTML, CSS, Sass, Python 3, Programming, Firebase, Django, GraphQL, Express.js, Node.js, REST APIs, Bootstrap, Deck.gl, i18n, Formik, Expo, React-Bootstrap, Jest, Git, NPM, TypeORM, MySQL, PostgreSQL, Draft.js, Stripe API, Stripe Checkout, Stripe Subscriptions, Lodash, Mapbox GL, Front-end, Web Architecture, Architecture, API Integration, APIs, Chart.js, MongoDB, Tailwind CSS, Serverless, Redux, JSON Web Tokens (JWT), Responsive Web Apps, Expo.io, D3.js, JSON, Bug Fixes, Code Review, Full-stack, Dashboards, NoSQL, Mobile, REST, Collaboration, Real-time Data, Agile Product Delivery, Databases, Elasticsearch, Marketplace Platforms, Contentful, React Redux, Web Development, Mobile Development, Cloud Storage, Full-stack Development, UI Development, User Experience (UX), User Interface (UI), Minimum Viable Product (MVP), Figma, Design Systems, Charts, Puppeteer, Chromium, Web Dashboards, Behavior-driven Development (BDD), Firebase Authentication, Webpack, Online Payments, Cloud Platforms, Authentication, Mapbox, Google Maps, Mapbox SDK, Google Maps SDK, Data Visualization, Web Applications, Content Management Systems (CMS), Visualization, Visualization Tools, API Development, Webhooks, SEO Tools, Search Engine Optimization (SEO), Application State Management

Full-stack Developer

2019 - 2019
An Online Freelance Agency
  • Contributed to the development of company objectives and worked to achieve them.
  • Designed, coded, and tested solutions in collaboration with others.
  • Achieved successful software modifications and alterations based on specific design specifications.
  • Stayed on top of new trends, technologies, and standards in website development.
  • Used uniform fonts, formatting, images, and layout, and achieved a consistent look and visual theme for each website.
  • Ensured client deadlines were met, demonstrated excellent decision-making abilities, and used problem-solving skills effectively.
Technologies: React, React Native, Firebase, Django, Web Architecture, Architecture, HTML, CSS, JavaScript, TypeScript, Data, Auth, SQL, SQLite, MySQL, Admin Panels, API Integration, REST APIs, APIs, Tailwind CSS, Serverless, Redux, JSON Web Tokens (JWT), Responsive Web Apps, Expo.io, D3.js, JSON, Bug Fixes, Code Review, Full-stack, Dashboards, NoSQL, Mobile, REST, Collaboration, Real-time Data, Agile Product Delivery, Databases, Elasticsearch, Marketplace Platforms, Contentful, React Redux, Web Development, Mobile Development, Cloud Storage, Full-stack Development, UI Development, User Experience (UX), User Interface (UI), Minimum Viable Product (MVP), Figma, Design Systems, Charts, Puppeteer, Chromium, Web Dashboards, Behavior-driven Development (BDD), Firebase Authentication, Webpack, Online Payments, Cloud Platforms, Authentication, Mapbox, Google Maps, Mapbox SDK, Google Maps SDK, Data Visualization, Web Applications, Visualization, Visualization Tools, API Development, Webhooks, SEO Tools, Search Engine Optimization (SEO), Application State Management

Motion Graphics Expert

2014 - 2018
An Online Freelance Agency
  • Developed motion graphics to enhance the design of websites.
  • Ensured that motion graphics were used to support specific storytelling requirements.
  • Animated characters using advanced software to place cartoons into motion.
  • Produced instructional videos used to train employees.
  • Produced marketing videos to increase the number of sales for businesses.
Technologies: After Effects CC, Illustrator CC, Photoshop CC, Blender

Graphic Designer

2014 - 2018
An Online Freelance Agency
  • Designed and developed materials to improve the design, appearance, and UI of websites.
  • Worked alongside marketing specialists and graphic designers.
  • Completed many freelance graphic design projects with a high customer satisfaction rate.
  • Contributed to the creation of graphic materials for use by the marketing department.
Technologies: Photoshop CC, Illustrator CC, Blender

Web App from Which Users Can Obtain Inbound Leads

A React application that lets users register and quickly create profiles, showcasing their skills and experiences.

I developed the website's front-end, added database, storage, authentication, and monthly subscriptions as a full-stack developer. Using a web designer's design, I implemented it on the website, but I also made creative decisions.

React App for Adventures in Various Cities

This is a React app that allows users to explore various cities across the globe without the need for a tourist guide.

It was a full-stack project that I worked on alone. I was responsible for creating a website where users could view and purchase adventures, login, register, and edit their profiles. My job also included creating a tool that the client could use to create new adventures, send newsletters, manage users and promote users to administrators. The adventure creation tool needed to meet a variety of requirements, such as tracking the user's location and determining the shortest route to the location the adventure creator had chosen. The website needed to be in two languages.

React Native Mobile App for Adventures in Various Cities

This was the second part of the "React App for adventures in various cities" project.

My task was to develop a mobile app where users could purchase adventures and play. Additionally, they had to be able to log in and register with the same credentials as on the website. The project required me to handle location tracking, app permissions, and local storage. It also had to be compatible with iOS and Android devices and work in two languages.

Django App for Adventures in Various Cities

A Django app for exploring cities around the world using pre-built adventures.

Eventually, React and Firebase were used to redesign this app, but the client initially requested a low-cost website for displaying their adventures, which were created using ChatBot. A Linode Ubuntu server hosted the website, and the adventures were stored in a MySQL database. The website allowed users to register and log in, along with making purchases using Stripe Checkout.

Next.js Portfolio Website

A designer's portfolio website built with Next.js and TypeScript.

They needed to display their past work and case studies on the website, with images displayed in a gallery format, and to have the ability to add new items to the portfolio and modify the existing ones. Additionally, they needed to be able to write new articles and place them in predefined categories. I was required to create a form through which potential clients could inquire about the designer's services.
2015 - 2020

Bachelor's Degree in Information Technology and Electrical Engineering

Faculty of Electrical Engineering, Computer Science and Information Technology - Osijek, Croatia

Libraries/APIs

React, Node.js, REST APIs, D3.js, Formik, Nightwatch.js, API Development, Three.js, Stripe API, Lodash, Mapbox GL, React Motion, Stripe, Mapbox API, Auth, React Native for Web, Chart.js, React Redux, Puppeteer, Google Maps, Google Maps SDK, Yup

Tools

NPM, Git, JSX, JavaScript Testing, GitHub, Expo.io, Figma, Firebase Authentication, Photoshop CC, Illustrator CC, After Effects CC, Blender, Expo, Stripe Checkout, react-map-gl, Jira, Prisma, Webpack, React Apollo

Languages

JavaScript, TypeScript, HTML, CSS, Sass, SCSS, Markdown, GraphQL, SQL, Python, Python 3

Frameworks

React Native, Bootstrap, Jest, React-Bootstrap, Next.js, Draft.js, Cypress, Django, Express.js, Redux, Tailwind CSS, JSON Web Tokens (JWT), Material UI, Deck.gl

Paradigms

Web Architecture, Test Automation, REST, Mobile Development, Automated Testing, Testing, Automation, Marketplace Platforms, Search Engine Optimization (SEO), B2B, Behavior-driven Development (BDD)

Platforms

Firebase, EmailJS, Mobile, Ubuntu, MacOS, iOS, Android, Contentful, Mapbox, Linode, Docker, Amazon Web Services (AWS), Azure

Storage

JSON, NoSQL, Databases, PostgreSQL, MySQL, SQLite, Database as a Service (DBaaS), MongoDB, Elasticsearch

Other

Programming, i18n, Front-end, UI Testing, UI Automation, API Integration, APIs, Responsive Web Apps, Full-stack, Collaboration, Web Development, Cloud Storage, Full-stack Development, UI Development, User Experience (UX), User Interface (UI), Minimum Viable Product (MVP), Design Systems, Charts, Web Dashboards, Authentication, Web Applications, Application State Management, Stripe Subscriptions, CAPTCHA, Asynchronous Data Streams, Architecture, Data, Admin Panels, Web Security, QA Testing, QA Automation, Geolocation, Mapping, QR Codes, Digital Payments, Apollo, Serverless, Bug Fixes, Code Review, Dashboards, Real-time Data, Agile Product Delivery, Chromium, Online Payments, Cloud Platforms, Mapbox SDK, Data Visualization, Content Management Systems (CMS), Visualization, Visualization Tools, Webhooks, SEO Tools, TypeORM, Maps, Google Directions, Google SEO, Data Sourcing, Apollo Server, SaaS, Big Data, Large Scale Distributed Systems

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring