Senior Front-end Engineer (Three.js)

On The Spot Development is a software development company that builds R&D teams for heavily invested startups and tech companies from the UK, EU, and Israel.

This job opportunity is for a position within one of our teams. You will be directly employed by On The Spot and will collaborate closely with our partner companies, contributing to their product's journey. At this stage, details about the team and project are under NDA and cannot be shared publicly. We’ll be happy to tell you more during the interview process.

We're looking for a Senior Frontend Engineer with good expertise in Three.js or similar 3D libraries to join our lean, highly skilled R&D team. 

Responsibilities

• Build and maintain advanced web interfaces using React, TypeScript, and modern UI libraries like Material UI or Ant Design
• Work with Three.js to render and manipulate interactive 3D scenes and components
• Design and manage application state using Redux Toolkit or plain Redux, including integration with 3D logic
• Integrate RESTful APIs and collaborate closely with backend developers to ensure efficient data flow and contract clarity
• Optimize component rendering, 3D scene performance, and app responsiveness across the UI

Requirements

• 5+ years of hands-on experience building modern web applications, with a primary focus on frontend development using TypeScript, React, and Three.js
• Expertise in integrating and manipulating interactive 3D models and scenes with Three.js
• Proven ability to architect and manage application state in React workflows, leveraging Redux Toolkit or plain Redux alongside Three.js
• Solid knowledge of JavaScript/TypeScript, HTML5, CSS3 with UI libraries like MaterialUI or Ant Design
• Proven experience integrating with RESTful APIs and ability to communicate clearly with backend developers
• Optimize performance practices at all levels, especially in rendering and component updates
• Experience with Git, code reviews, and working in a collaborative, agile environment
• Good understanding of agile development methodologies
• Familiarity with microservices architecture and concepts
• English level - B2

Nice to have

• Practical experience in backend development using Node.js (core or framework) with any SQL database

Benefits

• Work in a highly professional team with a friendly and informal atmosphere
• Paid vacation — 20 business days per year, 100% sick leave payment
• Equipment provision
• Partially compensated educational costs (for courses, certifications, professional events, etc.)
• Legal and Accounting support in Poland
• Ability to work from our comfortable office in Warsaw
• ‍5 sick days per year
• Medical insurance (after the end of the probationary period)
• Flexible working hours – we care about you (!) and your output
• English and Polish classes 2 times a week (online)
• Bright and memorable corporate life: corporate parties, gifts to employees on significant dates