Frontend Developer

Hybrid role: 3 days per week at the office in Valencia (Spain)At Principal33 we strive to make happiness at work a reality. Because it's not just about the money, it's also about the work environment and appreciation. It's about creating the best team setup you can imagine and getting involved in the things you're passionate about. And you can be a part of it, because it's fun to get things doneWe want our employees to innovate and we allow them to do what they are truly passionate about. Based on this conviction, Principal33 aligns its strategy around its vision: to become a leading IT service company and a better working-life balance. With currently around 200 employees from different countries, we are actively shaping the future of work.As a Frontend Developer you will take ownership of frontend solutions, shape user experience decisions, and mentor others while delivering high-quality products.In this role, you will contribute to an AI-driven video analytics platform focused on real-time detection and alerting . The platform enables users to monitor live video streams and respond quickly to detected events. Your work will directly influence how users interact with critical information in time-sensitive scenarios.Key ResponsibilitiesDesign, develop, and maintain React-based user interfaces for the AI-driven video analytics platformBuild frontend applications that interact with backend APIs , ensuring reliable data flow and error handlingDevelop and maintain user workspace management and configuration features , enabling users to customize and control their operational environmentCreate clear, responsive, and scalable UIs for real-time data visualization and alertingOwn frontend architecture, component structure, and UI patterns to ensure long-term maintainabilityImplement and manage state and asynchronous data handling using RTK Query, React Query, Redux, or similar solutionsUse Tailwind CSS and ShadCnUI to build consistent, accessible, and reusable UI componentsCollaborate closely with backend and AI engineering teams to define and implement frontend requirementsEnsure high standards of code quality, performance, and usability through reviews and best practicesContribute to UX and product discussions, translating complex workflows into intuitive user experiencesRequirementsMust-Have QualificationsStrong professional experience as a Frontend Developer working with React in production environmentsProven ability to build UIs that interact with backend APIs in complex, data-driven applicationsExperience designing and implementing user workspace management or configuration-driven interfacesSolid understanding of state and data management using RTK Query, React Query, Redux, or equivalent librariesHands-on experience with Tailwind CSS and/or ShadCnUI (or similar modern UI component systems)Strong knowledge of modern frontend development practices, including component-driven architecture and hooksAbility to translate product and technical requirements into clean, intuitive, and scalable user interfacesStrong communication skills and a collaborative mindsetNice-to-HaveExperience working on real-time, event-driven, or data-heavy frontend applicationsFamiliarity with SaaS platforms and microservice-based architecturesInterest in AI-powered systems, video analytics, or mission-critical softwareExperience collaborating closely with backend and AI teamsWhat we offerBenefitsFlexible work hoursPrivate medical insuranceDay off on your birthdayReferral bonus if you bring your contactsGifts for special occasionsOffice that takes care of your well-being and on top of all we are pet friendly, bring your pet to the officeFridge full of snacks at the office, healthy ones and not so healthy as wellInternational and multicultural environment(Self)-DevelopmentContinuous training, we will help you improve your technical skills, evolve in the tech community and develop as a professional.We are an active part of the tech-community. You may have the opportunity to attend and participate in local and international tech-events.Wanna join?