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# Frontend Developer

- **Company:** Otto Group
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €60,000.0
- **Contract:** Permanent contract
- **Skills:** Code Review, HTTP Secure, TypeScript, Web Applications, WebSocket, ReactJS, Solid Principles, Reactive Programming, Front End Software Development, Code Restructuring
- **Published:** September 24, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

Several years of professional experience in frontend development, ideally building complex React-based applications at scale.
Strong proficiency in TypeScript and modern frontend development practices.
Solid understanding of software design principles, including practical application of SOLID principles.
Familiarity with Functional Reactive Programming (FRP) concepts, either theoretical or practical.
Understanding of HTTP(S) and WebSocket protocols and their behavior in real-world applications.
Ability to independently analyze technical requirements and break them into structured, deliverable tasks.
Strong awareness of UX/UI principles and how native interface components behave and should feel.
Experience participating in code reviews and contributing to engineering quality standards.
Fluent Russian language skills.

## Description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Frontend Developer (Core) based in Spain.
This is a senior-level engineering role focused on building and evolving large-scale, user-facing web applications that connect millions of people across global markets. You will work at the core of complex frontend systems, shaping architecture, performance, and user experience across high-traffic products used internationally. The role combines hands-on React development with technical leadership, where you will design scalable solutions, refactor existing systems, and ensure smooth, high-performance user interactions. You will collaborate with distributed, multicultural teams in a fully remote environment, contributing to products that directly impact how people connect and interact online. The environment is fast-moving, product-driven, and highly collaborative, with a strong emphasis on autonomy, ownership, and engineering excellence. This role is ideal for a developer who enjoys solving complex frontend challenges at scale while influencing both technical direction and user
experience.
Accountabilities:
Develop and enhance high-quality frontend features for large-scale web applications using React and TypeScript.
Refactor and improve existing functionality to ensure maintainability, scalability, and performance across global products.
Optimize application speed, responsiveness, and overall user experience across different devices and environments.
Design robust technical solutions and contribute to frontend architecture decisions for complex systems.
Break down technical requirements into actionable tasks and independently deliver end-to-end implementations.
Participate in code reviews and uphold high engineering standards across the frontend codebase.
Collaborate with cross-functional teams to ensure alignment between product goals, UX design, and technical execution.


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