? Location: Barcelona, Spain (Hybrid)
? Employment: Full-time
? About Our Client
Our client is building the AI platform that will redefine the future of hardware engineering.
Their product brings together system architecture, requirements, verification, and engineering workflows into one intelligent platform, helping engineering teams design and build the world's most advanced hardware systems faster and more efficiently.
From aerospace and defense to robotics, transportation, and semiconductor technologies, they're creating the AI infrastructure that will power the next generation of engineering.
This is an early-stage company where every engineer has a direct impact on the product, technology, and the future of the business.
? About the Role
As a Full-Stack Software Architect, you'll work directly with the founders to help build both the product and the engineering organization from day one.
This is far more than a senior engineering role. You'll define technical direction, influence architecture, establish engineering standards,



and make key product decisions while remaining deeply hands-on.
You'll own significant parts of the platform, work directly with customers, contribute to strategic decisions, and help build the engineering culture as the company scales.
If you're excited about solving difficult technical challenges, building AI-native products, and creating something from the ground up, this is an opportunity to make a lasting impact.
? What You'll Do
Own product development from concept to production
Design scalable system architecture and engineering standards
Build modern full-stack applications and backend services
Own infrastructure, cloud deployments, CI/CD, and observability
Work directly with founders, customers, and industry partners
Translate customer needs into product decisions
Build AI-powered capabilities across the platform
Help establish engineering processes, code quality, and development culture
Contribute to hiring and mentoring future

📌 Full-Stack Software Architect (Barcelona)
🏢 OnHires
📍 Barcelona