Senior Software Engineer

Summary

Join Qustodio, a global leader in online safety, as a Senior Software Engineer. You will collaborate with a worldwide team to build innovative, high-quality solutions for digital well-being. This role demands strong technical expertise, problem-solving skills, and excellent communication. You will build scalable solutions, develop applications and tools, contribute to engineering excellence, and collaborate with cross-functional teams. The ideal candidate possesses proficiency in server-side development, experience with microservices, and a passion for continuous improvement. Qustodio offers exciting challenges, a strong team culture, a diverse workplace, flexible work environment, competitive salary, and professional development opportunities.

Requirements

• Proficiency in server-side development with experience in microservices
• Strong background in scalable and high-performance systems, handling large volumes of data
• Passion for continuous improvement and enhancing the development and troubleshooting process
• A test-driven mindset, prioritizing reliability and code quality
• Fluency in English, our working language

Responsibilities

• Build scalable solutions that enable schools and families to manage millions of students’ digital well-being
• Develop applications and tools that support experimentation, customization, observability, and quality
• Contribute to engineering excellence by sharing expertise in leading technologies
• Collaborate closely with engineering, product, and customer success teams across multiple locations

Preferred Qualifications

• Ability to work effectively with cross-functional teams (engineering, product, QA, and customer success)
• Ability to explain technical concepts to non-technical stakeholders
• A proactive approach to problem-solving and results-oriented mindset
• A self-driven attitude with a collaborative spirit

Benefits

• Exciting challenges in a fast-growing tech company where you can grow your skills and career
• A strong team culture—we value collaboration, learning, and fun
• A diverse workplace—our team includes professionals from 18+ nationalities
• Flexible work environment—including remote work options
• Competitive salary and private health insurance
• Professional development opportunities—in-house training and team-building events
• A great office in Barcelona—modern, fully equipped, and in the city center
• Daily fruit and beverages
• Lunch catering
• 23 days of annual leave plus a half-day off on your birthday
• Flexible benefits package