Senior React Engineer

<p><br/></p><p>We want to create a different kind of banking and shopping experience. Northmill was founded in 2006 and the main office is in Stockholm and Poland Engineering Center site is located in Katowice. Grab this opportunity to be a part of us and our journey!<br/></p><p><strong></strong><strong>The scope of your role:</strong></p><p><em>Challenging an entire industry and building a great company requires a lot of things. Guts, dedication, big visions, a mentality to get things done. Yet, there’s one thing that is more important than all of this – brilliant people. Just like yourself.</em> </p><p><strong>As our Senior React Engineer</strong> you will take part in the process of overseeing the development of modern financial solutions. Especially you will</p><ul> <li>Take ownership of developing our public-facing landing page using <strong>Next.js</strong>, ensuring it's fast, responsive, and SEO-friendly.</li> <li>Drive the development of our core back-office application built with <strong>React</strong>, creating a powerful and intuitive tool for our internal teams.</li> <li>Implement robust client-side data fetching and state synchronization using <strong>TanStack Query</strong> and <strong>Zustand.</strong></li> <li>Write clean, maintainable, and well-tested code, with comprehensive test coverage using <strong>Testing Library </strong>and <strong>Playwright.</strong></li> <li>Collaborate closely with product managers and designers to translate requirements into elegant and functional user interfaces using <strong>MUI.</strong></li> <li>Participate in code reviews to maintain a high standard of code quality and share knowledge within the team.</li> </ul><p><strong>Required qualifications:</strong><br/>You are a creative and curious person with a genuine passion for software development. You love writing clean, high-quality code in <strong>TypeScript</strong> and actively contribute your thoughts on solutions and potential challenges. We're looking for a proactive team player to thrive in our collaborative, multicultural environment where English is the language of choice. Plus you have:<br/></p><ul> <li dir="ltr">3+ years of professional experience building modern web applications.<br/></li> <li dir="ltr">Strong proficiency in <strong>TypeScript</strong> and a deep understanding of React's core principles.<br/></li> <li dir="ltr">Hands-on experience with <strong>React </strong>and <strong>Next.js</strong> for server-side rendering and static site generation.<br/></li> <li dir="ltr">Proven experience managing application state with <strong>Zustand</strong>.<br/></li> <li dir="ltr">Proficiency in client-side data fetching and caching with <strong>TanStack Query</strong> (React Query).<br/></li> <li dir="ltr">Experience building and styling applications with component libraries, specifically <strong>MUI</strong> (Material-UI).<br/></li> <li>Solid experience in testing with <strong>Testing Library</strong> for unit/integration tests.</li> </ul><p><strong>Preferred qualifications:</strong></p><ul> <li>Exposure to Agile/Scrum development methodologies.</li> <li>A Bachelor’s degree in Computer Science or a related field.</li> </ul><p><strong>About you?</strong><br/>You are a creative and curious person with a genuine interest in software development. We are always looking for new knowledge and have a curiosity out of this world. We think that you have the same mindset and you are excited to read about the latest tech trends. You might also, like us, love to write nice and high-quality code.<br/>We hope you are not afraid to inform us about problems and have your thoughts on various solutions.<br/>You are a team player and used to work in an Agile environment.</p><p><strong>We offer:<br/></strong></p><ul> <li> <strong>Projects (also from scratch) within a group of experts</strong> who are one of the best in Europe! 💪</li> <li> <strong>Real influence</strong> on tech stack and financial products, <strong>small project teams</strong> (max. 8 team members).</li> <li>A non-corporate atmosphere full of openness to innovation, improvement, teamwork and data-driven approach.</li> <li>A collaborative and international work environment with a strong focus on <strong>teamwork and professional growth</strong>.</li> <li>Flexible work hours in a hybrid mode with <strong>office</strong> in <strong>Katowice city center.</strong></li> <li>We love to celebrate our successes (small and bigger events):Northcon, Northchill.</li> <li> <strong>Benefits package</strong> (medical healthcare, life insurance, Multisport - and partially founded card for the family, English lessons, library, Employee Assistance Program).</li> </ul><p><strong>About Northmill</strong></p><p>A Swedish bank with the heart in the technique. 2.500 merchants. 600.000 end users.<br/>160 employees in four different countries, including Engineering Center hiring c.a. 40 experienced engineers. The goal? To improve financial life by being digital yet personal.