PSenior Front-End Engineer /ppIn CAPITOLE we are looking to reinforce our team with Senior Front-End Engineer with solid experience in code architecture and algorithmics, capable of making complex technical decisions and structuring medium/large scale applications. /pp Location: On-site presence required 1 time every month and a half in Barcelona. /ppJob Requirements /ppProven experience leading architectural decisions in complex React or Next.js projects. /ppDeep expertise in JavaScript/TypeScript and advanced design patterns. /ppStrong ability to optimize performance and manage rendering strategies (SSR, CSR, ISR). /ppSolid grasp of data structures and algorithms, and how they impact front-end performance. /ppExperience working with complex API integrations and modern state management (Zustand, Redux, TanStack, etc.). /ppCapable of mentoring other developers and reviewing code with a focus on quality and scalability. /ppLanguages: English - C1 / Spanish -B2. /ppStill don’t know us? Discover more: /ppOr check what others are saying: Glassdoor /ppWe’re excited to meet you! /ppThe employee will adhere to information security policies: /pulliWill have access to confidential information related to Capitole and the project they are working on. /liliMust comply with the security policies and internal policies of the company and the client. /liliMust sign an NDA. /li /ul