Senior Frontend Engineer

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Frontend Engineer in Spain.You will join a fast-growing product engineering environment focused on building scalable, high-performance frontend systems for modern SaaS infrastructure. In this role, you will take ownership of a complex frontend application used by high-profile companies and contribute directly to the evolution of a critical developer-facing product. You will work closely with Product and Backend Engineering teams to design, build, and ship robust features that combine usability, performance, and long-term maintainability. The environment is highly autonomous and requires strong ownership, proactive decision-making, and the ability to navigate ambiguity. You will also play a key role in shaping frontend architecture, improving observability, and maintaining design system consistency across the platform. This is a high-impact role for an experienced engineer who thrives in fast-paced, technically demanding, and collaborative product teams.Accountabilities:Own and evolve a complex frontend application, ensuring high standards of performance, reliability, scalability, and usability across all features.Collaborate with Product and Backend Engineering teams to design and implement new features from concept through to production delivery.Build, maintain, and scale a robust design system to ensure UI consistency and efficient development across the product.Improve frontend observability by implementing monitoring, logging, and debugging practices to proactively identify and resolve issues.Drive frontend architecture decisions, ensuring long-term maintainability and technical excellence.Work autonomously in a fast-paced environment, taking full ownership of tasks and delivering them end-to-end.Contribute to continuous improvement of engineering practices, code quality, and development workflows.Requirements5+ years of professional experience in frontend engineering with strong expertise in modern JavaScript frameworks.Expert-level proficiency in React and its ecosystem.Proven experience building and scaling design systems in production environments.Strong understanding of frontend performance optimization, monitoring, and observability practices.Comfortable working in autonomous, fast-moving, and ambiguous environments.Strong communication skills, with the ability to collaborate effectively across Product, Engineering, and Design teams.Ownership-driven mindset with a proactive and solution-oriented approach.Commitment to high-quality engineering, including maintainability, scalability, and performance.Nice to have:Experience with GraphQL.Exposure to developer tools, infrastructure products, or open-source ecosystems.Background in fintech, billing systems, or data-intensive frontend applications.Contributions to or participation in open-source projects.BenefitsCompetitive salary ranging from €60,000 to €90,000 per year.Stock options as part of the compensation package.Fully remote work across Europe.Opportunity to work on a widely adopted open-source billing platform used by leading global companies.High level of autonomy and ownership over core frontend systems.Collaborative, high-performance engineering culture focused on excellence and continuous improvement.Exposure to complex, large-scale SaaS and fintech-related technical challenges.Opportunity to shape the frontend of a fast-scaling developer-first product.How Jobgether works:We use anAI-powered matching processto ensure your application is reviewed quickly, objectively, and fairly against the role’s core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.We appreciate your interest and wish you the best!Why Apply Through Jobgether?Data Privacy Notice:By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.#LI-CL1We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

5+ years of professional experience in frontend engineering with strong expertise in modern JavaScript frameworks. Expert-level proficiency in React and its ecosystem. Proven experience building and scaling design systems in production environments. Strong understanding of frontend performance optimization, monitoring, and observability practices. Comfortable working in autonomous, fast-moving, and ambiguous environments. Strong communication skills, with the ability to collaborate effectively across Product, Engineering, and Design teams. Ownership-driven mindset with a proactive and solution-oriented approach. Commitment to high-quality engineering, including maintainability, scalability, and performance. Nice to have: Experience with GraphQL. Exposure to developer tools, infrastructure products, or open-source ecosystems. Background in fintech, billing systems, or data-intensive frontend applications. Contributions to or participation in open-source projects.

Competitive salary ranging from €60,000 to €90,000 per year. Stock options as part of the compensation package. Fully remote work across Europe. Opportunity to work on a widely adopted open-source billing platform used by leading global companies. High level of autonomy and ownership over core frontend systems. Collaborative, high-performance engineering culture focused on excellence and continuous improvement. Exposure to complex, large-scale SaaS and fintech-related technical challenges. Opportunity to shape the frontend of a fast-scaling developer-first product. How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role’s core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Frontend Engineer in Spain.