Senior Salesforce Frontend Engineer

apeirum is recruiting on behalf of maxon for a Senior Salesforce Frontend Engineer in Barcelona. This is a permanent position employed directly by maxon ; apeirum runs the selection process. maxon is a global provider of world-class precision drive systems. Its drives are used wherever extreme precision and the highest quality standards matter – on Earth, and on Mars. maxon offers creative minds and passionate doers a global yet trusted environment, where people who question what is possible and challenge themselves can grow. As Senior Salesforce Frontend Engineer you design and build modern, scalable and user-friendly frontends in maxon's Salesforce ecosystem. You shape the user experience of maxon's global Sales and Marketing platforms, with a strong focus on performance, usability and business value, and you work closely with backend developers, architects and business stakeholders in Barcelona and Switzerland. Hybrid in Barcelona (3 days office, 2 remote). Tasks
* Develop and maintain frontend components and interfaces in Salesforce, mainly with Lightning Web Components (and Aura where needed).
* Build and customise user interfaces across Experience Cloud, Commerce Cloud storefronts, Lightning App Builder and screen flows.
* Connect frontend components to Apex services and external APIs, with a clean separation between UI and business logic.
* Turn business requirements into intuitive, high-quality UI/UX within the platform's capabilities.
* Make applications fast, responsive and cross-browser compatible.
* Contribute to design systems and reusable components for consistency across applications.
* Take part in code reviews, testing and deployments, and keep improving existing frontend solutions.
* Use AI coding assistants responsibly to speed up development, reviewing every output for correctness, security and maintainability. Requirements – must have
* 5+ years of frontend development, with substantial hands‐on work in Salesforce.
* Senior‐level experience with Lightning Web Components (or Aura / similar component frameworks).
* Strong Salesforce Commerce Cloud experience.
* Strong frontend fundamentals: JavaScript (ES6+), HTML5, CSS3 and a component‐based mindset.
* Experience integrating frontends with Apex and external APIs.
* A structured, reliable and quality‐driven way of working, with ownership of your deliverables.
* Enjoy working in cross‐functional, international teams.
* Fluent English.
* Based in Spain (Barcelona). Nice to have
* Experience Cloud, screen flows and Lightning App Builder.
* Design‐system work and reusable component libraries.
* Jest or other JavaScript testing frameworks; CI/CD for Salesforce.
* Salesforce certifications (e.g. JavaScript Developer I, Platform Developer I, B2C/B2B Commerce Developer).
* Spanish or German. What maxon offers
* A permanent employment contract directly with maxon, competitive compensation, and flexible

working hours
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* A key role in global Salesforce solutions for Sales and Marketing.
* A dynamic and friendly workplace in maxon's Barcelona tech hub, combining startup energy with the stability of a Swiss industrial leader.
* International collaboration with teams in Switzerland and worldwide.
* Continuous learning and growth through the maxon academy.
* Additional benefits such as Club Natació de Barcelona membership and the Cobee program.