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# Frontend Developer

- **Company:** Applicantssqli Group
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Data Structures, Performance Tuning, Next.js, TypeScript, ReactJS, Backend, React Redux, Api Management
- **Published:** November 14, 2026
- **Apply:** https://www.adzuna.es/details/5965092716

## About the Role

We are a human touch company & key partner of the largest international companies with global projects.We#Perceive#Challenge#Deliver#InspireJob DescriptionWe are looking for afront-end developerwith proven experience in architecture and design patterns.
Working autonomously, you he/she implement front-end scripting on high-impact projects, promoting best practices and ensuring the scalability and performance of our applications.What is this all about?
Deploy all teams decisions in large-scale React/Next.Js applications.Define and implement modern front-end patterns, rendering strategies, and scalable structures.Collaborate with backend engineers, designers, and product managers to align architectural vision with business goals.Guide performance optimization through SSR, CSR, and ISR strategies.Contribute to design and implementation of complex API integrations and state management solutions.Main RelationshipsFrontend and Backend DevelopersProduct Owners & ManagersUX/UI DesignersQA EngineersBusiness StakeholdersQualificationsWho are you?
Proven experience coding in large ecommerce complex React or Next.Js projects.Deep expertise in JavaScript/TypeScript and advanced design patterns.Strong ability to optimize performance and manage rendering strategies (SSR, CSR, ISR).
Solid grasp of data structures and algorithms, and how they impact front-end performance.Experience working with complex API integrations and modern state management (Zustand, Redux, TanStack, etc.).
Capable of mentoring other developers and reviewing code with a focus on quality and scalability.Additional InformationWhat do we offer?

## Description

We are over **** talents in more than 13 countries and 3 continents.