Senior JavaScript Engineer

Ciklum is looking for a Senior JavaScript Engineer to join our team in Spain.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior JavaScript Engineer, you'll become a part of a cross-functional development team engineering experiences of tomorrow. You will be responsible for creating modern, high-performance web experiences for both our customer-facing sites and internal tools.

Responsibilities:

• Develop modern, high-converting user interfaces using effective marketing and design techniques
• Implement the frontend for our public sites and internal tools, ensuring compliance with web standards and full cross-browser and mobile responsiveness
• Integrate frontend components with PHP-based environments (experience with Twig or similar templating engines is a plus)
• Execute tests across multiple browsers and devices to ensure maximum performance and reliability
• Collaborate closely with Product, Marketing, Design, QA, and Operations teams
• Perform regular code reviews to maintain quality and consistency across the team
• Write clean, reusable, and efficient code, adhering to established best practices and design patterns

Requirements:

• 5+ years of professional experience in frontend development
• Strong proficiency in HTML5, CSS3, JavaScript (vanilla and jQuery), and Git
• Solid understanding of PHP environments and familiarity with Twig or similar templating systems
• Ability to code from scratch using modern JavaScript (ES6+)
• In-depth knowledge of CSS methodologies (e.g., BEM) and preprocessors such as SASS
• Comfortable using package managers (Yarn, NPM, etc.)
• A passion for clean code, design patterns, and best practices
• Experience with A/B test coding and comprehensive browser testing/debugging
• Strong analytical and problem-solving skills
• Conversational Spanish and Intermediate English communication skills are required
• Proactive, flexible, self-driven, and with an entrepreneurial mindset
• Demonstrated ability to work independently and take ownership of features and projects

Desirable:

• Experience contributing to projects using React and/or TypeScript for scalable frontend solutions
• Proven experience in mentoring junior developers and participating in code architecture discussions

What`s in it for you?

• Care: your mental and physical health is our priority. We ensure comprehensive company-paid medical insurance and 4 additional undocumented sick leave days
• Tailored education path: boost your skills and knowledge with our regular internal events (meetups, conferences, workshops), Udemy license, language courses and company-paid certifications
• Growth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally
• Flexibility: Own your schedule – you are the one to decide when to start your working day. Just don’t miss your regular team stand-up. We are there to support your work-life balance and provide 23 vacation days & short Fridays
• Opportunities: we value our specialists and always find the best options for them. Our Internal Mobility Program helps change a project if needed to help you grow, excel professionally and fulfill your potential
• Global impact: work on large-scale projects that redefine industries with international and fast-growing clients
• Welcoming environment: feel empowered with a friendly team, open-door policy, informal atmosphere within the company and regular team-building events

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
Based in Málaga, our team thrives in one of Andalusia’s leading tech hubs. Enjoy a hybrid work setup, the sunny Mediterranean vibe, and endless opportunities to grow your skills on global-scale projects.
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Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.