(Freelance) Frontend Engineer
Location: Hungary / (Remote)
Contract | React / TypeScript / UI Engineering
Day Rate : 120,000 to 160,000 HUF

About the Team

Hi, I’m Jon Frost, Principal Frontend Engineer at Hawk-Eye Innovations.

We’re looking for a Freelance Frontend Engineer to join our Data Engineering Team, where we build data-rich, highly interactive UI platforms used across the world of sport — from behind-the-scenes tools for analysts to fan-facing visualisations.

Our frontend work powers live match data, historic insights, and streaming overlays seen by millions. This role offers the chance to contribute to systems that blend high performance, sleek design, and real-time interactivity.

The products we are building provide live event logging in sports matches, data visualisation for coaches and video analysis for officials.

What You’ll Be Doing

• Designing and building interactive UIs using React and TypeScript
  

• Turning complex sports data into clean, usable experiences
  

• Working closely with backend, design, and data teams to ship features
  

• Scoping, estimating, and managing your own tasks using Jira
  

• Contributing to UI architecture, performance optimisation, and release workflows
  

• Writing clean, testable code with a focus on maintainability and clarity
  

• Collaborating with our Principal and Lead Engineers on frontend best practices
  

Key Responsibilities

• Scoping and managing project tasks from requirements

• Identifying and managing dependencies within a project — across disciplines and external teams

• Managing code releases across environments (Dev, Test, Staging, Prod)

• Writing high-quality code that is functional, maintainable, and easy for others to extend

• Taking pride in the detail and finish of the final product, and encouraging the same from others

• Communicating clearly and regularly to ensure the right solutions are being built

• Continuously developing your own technical expertise and staying up to date with best practices

• Sharing ideas, tools, and techniques to support the growth and knowledge of the wider team
  

Skills, Knowledge & Expertise

• Strong experience with TypeScript and React
  

• Solid understanding of backend integration with APIs and websockets
  

• Familiarity with Cypress or other automated testing frameworks
  

• Proficient in HTML and CSS — with an eye for layout and detail
  

• Confident with browser and device testing, including debugging workflows
  

• Experience working with JSON data structures and consuming APIs (GET/POST)
  

• Good command of responsive web design and web performance optimisation
  

• Effective npm dependency management
  

• Comfortable using Git for version control and clean code practices
  

• Experience using Jira for task and ticket management

Bonus Points For

• Node.js / AWS experience or comfort working full-stack
  

• Passion for sport, data visualisation, or interactive tech
  

• Familiarity with performance profiling and Lighthouse
  

• Experience working in broadcast, sports tech, or time-sensitive UI systems
  

Contract Details

This is a freelance/contractor role, ideal for someone looking to embed within a collaborative, high-performance engineering team.

Equal Opportunity Employer

We’re committed to fostering a diverse and inclusive workplace. Everyone is welcome — regardless of background, gender, age, disability, or identity. Be your best and truest self here.