GrepJob
OnHires

Full-Stack Software Architect

OnHires
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about 3 hours ago
Barcelona, SpainSenior / Staff+

Responsibilities

  • 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 engineers.
  • Represent the company at customer meetings and industry events.

Requirements

  • 6–10 years of professional software engineering experience.
  • Strong experience designing and owning production software architecture.
  • Excellent TypeScript skills across the full stack.
  • Strong backend architecture and API design experience.
  • Experience with React or another modern frontend framework.
  • Deep knowledge of PostgreSQL or other relational databases.
  • Experience with Docker, CI/CD, and cloud platforms (AWS, GCP, or Azure).
  • Strong understanding of scalability, security, testing, observability, and system reliability.
  • Proven ability to take products from idea to production.
  • High ownership and comfort working in an early-stage startup.
  • Experience using AI development tools and modern LLM workflows.
  • Strong communication skills and fluent English.
  • Based in Barcelona or willing to relocate.
  • Right to work in the EU without visa sponsorship.

Benefits

  • Become one of the first engineers shaping the company's future.
  • Work directly with experienced founders and technical leaders.
  • Own architecture, product decisions, and engineering standards.
  • Build AI-native software solving real engineering challenges.
  • Competitive salary plus meaningful equity.
  • Help define the engineering culture and grow the team from the ground up.