Remote Senior Front End Developer - React

LumRisk; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading technology firm based in Madrid is seeking a Senior Front End Developer to design and maintain responsive web applications using React.js and Next.js. The ideal candidate should have at least 4 years of experience, strong skills in HTML, CSS, and JavaScript, and a passion for innovation. Duties include collaborating with team members to optimize application performance and ensuring a seamless user experience. The position requires EU citizenship or a valid work permit.

Formación

• At least 4 years of work experience in front-end technologies.
• Fluent in English; other languages are an asset.
• Excellent communication and problem-solving skills.

Responsabilidades

• Design and develop responsive web applications using React.js or Next.js.
• Collaborate with UI/UX designers and backend developers.
• Optimize application performance and ensure technical feasibility.

Conocimientos

Proficiency in Next.js / React.js

Strong knowledge of HTML, CSS, and JavaScript (ES6+)

Experience with responsive web design

Understanding of web standards and browser compatibility

Familiarity with REST API consumption

Experience with version control systems (e.g. Git)

Knowledge of unit testing

Experience with code-splitting and lazy loading

Experience with TypeScript

Understanding of CI/CD workflows

Familiarity with Agile development

Educación

Bachelor's degree in Computer Science

Herramientas

Docker

Kubernetes

Descripción del empleo

LumRisk S.A. is an independent provider of state-of-the-art financial risk consolidation and reporting services to institutional clients. Based in Nyon, Switzerland, LumRisk has developed an interactive web-based application that provides detailed risk analysis, reporting, and stress testing on client portfolios, based on full position-level transparency. LumRisk covers the full spectrum of financial instruments from traditional long only and multi-asset investments to complex derivatives, hedge funds, and alternative risk premia.

In response to significant growth opportunities, and to speed up our development cycle, LumRisk is current looking to hire for its Madrid (Spain) office a :

Senior Front End Developer

Responsibilities

• Design, develop, test, and maintain responsive web applications using React.js or ideally Next.js 15, incorporating charting libraries for data visualization.
• Applying frontend security development best practices.
• Collaborating with UI / UX designers and backend developers to ensure seamless user experience.
• Optimizing application performance and ensuring technical feasibility of UI / UX designs.
• Participating in code reviews, testing, and debugging to maintain high-quality standards.
• Consuming and integrating REST APIs, ensuring security best practices.
• Working closely with cross-functional teams, including data engineers and business users, to understand project requirements.
• Keeping up with the latest front-end technologies and industry trends to enhance application performance and user experience.

Skills and experience desired

• Proficiency in Next.js / React.js and its ecosystem, at least 4 years of work experience.
• Strong knowledge of HTML, CSS, and JavaScript (ES6+).
• Experience with responsive web design and modern front-end development practices.
• Understanding of web standards, browser compatibility, and security protocols.
• Familiarity with REST API consumption and integration.
• Experience with version control systems (e.g. Git)
• Knowledge of unit testing and integration testing
• Experience with code-splitting, lazy loading, and memoization techniques to optimize large-scale applications.
• Experience with TypeScript to enhance code maintainability and scalability.
• Understanding of Continuous Integration / Continuous Deployment (CI / CD) workflows for smooth development processes.
• Familiarity with Agile development.

Optional Qualifications

• Experience with React Native, SQL, Docker, or Kubernetes.
• Background in data visualization or experience in the financial industry.
• Hands-on experience with Docker, Kubernetes, and CI / CD pipelines for deploying and managing applications.

Profile

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• Fluent in English. Other languages are an asset.
• Excellent leadership, communication, and problem-solving skills.
• Passionate about innovation and dedicated to building high-quality applications.
• Excited to contribute to the future of LumRisk’s applications and interactive reports.
• Able to switch very fast from one task to another (multitasking).
• Strong problem-solving skills and ability to work in a fast-paced environment.
• Curious and independent, with a strong willingness to collaborate with business users and developers.
• Team player.
• Analytical mindset, attention to details.
• Excellent communication skills.
• You are a highly motivated, social, creative but pragmatic individual, with the willingness to learn and evolve in an entrepreneurial setting. LumRisk is an ambitious project and a demanding position in a fast-growing environment offering to take on further responsibilities.

EU citizenship or a valid work permit to work in the European Union at the time of application is a pre-requisite. This position is for our office in Madrid, Spain.

Starting date : ASAP