Front-end Developer (React / TypeScript)

Location: Poland

We Are:
RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Our proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to achieve outstanding results and meet their goals at every stage of the funnel.

As a Front-End Developer, you will join a team building multiple single-page applications that are used to configure, monitor, analyze, and automate advertising campaigns, as well as support various internal company processes.

You Will:

• Design and implement advanced user interfaces, such as forms divided into nested, sortable sections with drag & drop support;
• Build configurable table views with user-defined column visibility, ordering, and data filtering based on individual preferences;
• Develop reusable UI components used system-wide by multiple teams – for example, an advanced virtualized DataGrid and many others;
• Work closely with an interdisciplinary product team, including QA engineers, Product Designers, Backend Developers, and DevOps specialists;
• Take part in code reviews and team-based frontend architecture design – we care deeply about code quality, consistency, and continuous improvement.

Desired Experience: 

• 5+ years of commercial experience in building web applications, with a strong focus on React;
• Proficiency in JavaScript and TypeScript;
• Practical experience in writing unit tests using tools such as Testing Library, Vitest, or Jest;
• Solid understanding of frontend-backend communication, including REST APIs and GraphQL;
• Experience with data management and caching libraries like Apollo Client and/or React Query;
• Strong knowledge of HTML and CSS (including Flexbox and CSS Grid);
• Fluency in English and Polish (C1 level or above).

Nice to have:

• Basic knowledge of databases (e.g. SQL) – understanding how data is structured and queried helps in designing more effective UIs;
• Awareness of UX/UI best practices – a product-oriented mindset significantly improves delivered solutions;
• Experience with Storybook or similar tools for developing and documenting UI components;
• Willingness to proactively suggest architectural or technical improvements.

Selected Technologies: 

• React with TypeScript
• Apollo Client (GraphQL) & React Query (REST)
• Vite / Vitest / Testing Library
• Storybook
• GitHub
• Sentry

We Offer: 

• Projects focused on high code quality – solid code reviews are our standard;
• Collaboration within an interdisciplinary, self-sufficient team including: DevOps (ensuring a great Developer Experience), database experts, backend developers, product designers, and QA engineers;
• Hardware and software tailored to your preferences – e.g. MacBook, AI tool licenses;
• Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects;
• Flexible working conditions – no core hours, fully remote cooperation.

Apply now! 

You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.