Job description

Position: Senior Frontend Engineer

Location: Kraków (hybrid)

Contract type: Permanent or B2B

Our client is a rapidly growing player in the online betting and gaming space. With a strong network of industry partnerships and a focus on expanding access to digital sports entertainment, they’re shaping how fans engage with games in real time.The team builds a high-performance, in-house platform used by millions of users across. Engineers here are empowered to own solutions end-to-end, work cross-functionally, and contribute to a fast-moving product roadmap.

What You’ll do:

• Work closely with Product, Design, and QA to deliver high-quality user experiences

• Turn UI/UX designs into functional, responsive interfaces

• Build fast, scalable web components with cross-browser compatibility in mind

• Optimize performance and write reusable, modular code

• Participate in code reviews, agile ceremonies, and architectural discussions

• Mentor peers and contribute to team growth

What we’re looking for:

• 6+ years of experience building products with React for web and mobile

• Excellent skills in JavaScript, React.js, React Native, and ideally Capacitor

• Solid understanding of software engineering principles and design patterns

• Experience with CI/CD and agile delivery environments

• Ability to take ownership of projects and work cross-functionally

• Passion for continuous learning and product-driven development

• Bonus: experience in iGaming or online betting