Senior Software Engineer

Founded in 2012 by cybersecurity experts Eduardo Cruz, Josep Gaspar, and Josh Gabel, Qustodio is a global leader in online safety and digital well-being for families. In 2022, Qustodio joined the Qoria Group, working with schools, parents, and educators to protect children’s digital journeys. Our mission is to help families and schools navigate the digital world safely and intelligently.

Together, we empower millions of families and educators worldwide to protect children from online harm while fostering healthy digital habits.

The Role

We are looking for a Senior Software Engineer to help take Qustodio to the next level, making it a best-in-class solution for digital well-being in families and schools.

As a key member of one of our new engineering teams, you will collaborate with engineers worldwide to build innovative, high-quality solutions. This role requires a team player with strong technical expertise, problem-solving skills, and excellent communication.

Above all, we seek a talented engineer who enjoys new challenges, continuous learning, and is ready to work with diverse technologies to improve our product for millions of users.

Our Technology Stack

Your tech stack will depend on the domain you work in, providing plenty of opportunities for growth and development. Our cloud-based platform (GCP & AWS) includes:

• Backend RESTful services written in Go and Java

• Frontend client-side apps using React

• Multi-Platform Applications in Go & TypeScript deployed across laptops

• DevOps & Orchestration with Terraform, Docker, Kubernetes, Cloud Run

• GitHub, trunk-based development, GitOps, Cloud Deploy

• BigTable, BigQuery, Dataflow, Pub/Sub, PostgreSQL, Redis, Memcached

What You’ll Do

• 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.

What You Bring

• 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.

Soft Skills We Value

• 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.

What We Offer

• 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.

• Perks and benefits:

  • Daily fruit and beverages

  • Lunch catering

  • 23 days of annual leave plus a half-day off on your birthday

  • Flexible benefits package