My client is an innovative product company working at the intersection of software and cutting-edge security technology. With a successful product already in production and a second in development, they’re now opening a new office in Barcelona – and are looking for a unicorn Senior Full Stack Developer to join the founding local team.

This is not just a development role - it’s a rare opportunity to grow into a CTO-level leadership position, helping shape both the technology and culture of a fast-scaling company.

Tech Stack & Requirements

• Excellent knowledge of C# and Python
• Strong experience with JavaScript/TypeScript
• Comfortable working with Linux environments and Docker
• Passion for product development and building innovative, high-quality software
• Based in or willing to relocate to Barcelona (onsite role)
• Fluent in English – international team and client base

What You’ll Get

• Be part of a product-first company creating secure, enterprise-grade solutions
• Pathway to technical leadership / CTO
• Work in a newly opened Barcelona office with flexible working hours (but not remote)
• Competitive salary with a generous performance-based bonus scheme
• Opportunity for occasional international travel (rare, but possible)
• Work with high-profile clients in a meaningful, mission-driven environment

If you’re a senior full stack engineer with a drive to build, lead, and innovate in the security space, this is your chance to shape the future of a company from the inside out.