Senior Frontend Developer

ABOUT THE TEAM

At SMP Mobility (soon to be Vend), we help our users make smarter decisions by providing real, actionable insights throughout their journey. Our Insight as a Product team builds end-user insight products on top of rich, structured datasets — and we’re now looking for a Frontend Senior Developer to shape how these insights are delivered at scale.

ABOUT THE ROLE

You will lead the architectural direction of our frontend applications and data-driven UI experiences, ensuring performance, usability, and long-term maintainability. You’ll work in a product team with developers, product manager, analyst and designers to build seamless, high-impact user experiences that make complex data accessible and useful.

This is a hands-on role for a frontend technologist who’s passionate about designing and developing for performance, building scalable design systems, and mentoring engineers.

Additionally:

• Own the frontend architecture strategy and implementation for insight-driven products.
• Design and develop scalable, maintainable, and performant UIs using React, Next.js, and TypeScript.
• Collaborate to translate complex data structures into intuitive UIs.
• Build reusable components and work in collaboration with designers.
• Optimize for data-heavy interfaces — including real-time data visualizations, dashboards, and interactive reporting tools.
• Set engineering standards for frontend development (testing, accessibility, performance, and CI/CD practices).
• Review code, build/improve frontend competency, and guide technical decisions in the teams.
• Lead the adoption of new technologies, frameworks, and tools as appropriate.

ABOUT YOU

• frontend development experience, including architecting complex web applications.
• Deep expertise in React, Next.js, and TypeScript.
• Strong understanding of component-based architecture, state management, and API integration.
• Experience building and maintaining design systems and component libraries.
• Skilled at optimizing frontend performance, especially in data-intensive environments.
• Strong UX and accessibility instincts — able to partner well with product and design.
• Comfortable working with CI/CD, frontend testing frameworks, and modern tooling (e.g., Vite, Storybook, Jest, Playwright).
• Experience with data visualization tools or libraries (e.g., Recharts, D3, Highcharts) is a big plus.
• Excellent communication and collaboration skills; able to mentor and lead cross-team frontend efforts.
• Bonus: Familiarity with data privacy, analytics, or domain modeling in frontend contexts.

WHY THIS ROLE MATTERS:

• You’ll define how users interact with our most important asset — insight.
• You’ll build tools that help people understand and act on complex data.
• You’ll enable our team to move faster and build better with a strong frontend foundation.
• You’ll shape the look, feel, and performance of our product for years to come.

We work in a hybrid way and would like to catch up with you at our vibrant and colourful office in Kraków 2 days per week. This allows for collaboration and meaningful connections with the team. If you’re not the working-from-home kind of person, you are of course welcome in our office every day!