Backend Engineer (SaaS)

TL;DR

Backend Engineer (SaaS): Designing and evolving the backend architecture of a multi-tenant SaaS platform for real estate companies with an accent on multi-tenant data architecture and integration pipelines for ERP and accounting systems. Focus on authentication and authorization mechanisms, including RBAC and SSO integrations, to turn an early-stage system into an enterprise-grade platform.

Location: Remote (Spain)

Company

hirify.global is an ETH Spin-off building an automation platform for real estate companies.

What you will do

• Design and evolve the backend architecture of our multi-tenant SaaS platform.
• Build and improve APIs and services powering document processing workflows, integrations, and internal platform logic.
• Design robust data models in PostgreSQL that support multi-tenant environments, complex workflows, and customer-specific integrations.
• Integrate external systems such as ERP platforms and accounting tools via APIs and event-driven workflows.
• Improve authentication and authorization mechanisms, including RBAC and SSO integrations.
• Introduce engineering best practices across the backend stack, including testing, CI/CD pipelines, and monitoring.

Requirements

• Have at least 5 years of Backend working experience.
• Have experience in building and operating backend systems in production.
• Have designed database schemas and backend architectures for complex business workflows.
• Have strong backend fundamentals and experience building APIs and backend services.
• Are comfortable working with relational databases such as PostgreSQL and designing data models for complex workflows.
• Understand authentication and authorization concepts such as RBAC, OAuth, and SSO.

Nice to have

• Experience building multi-tenant SaaS systems.
• Experience with cloud infrastructure such as Microsoft Azure, AWS, or GCP.
• Experience designing systems that process or structure documents and large datasets.
• Experience improving engineering maturity (testing, CI/CD, observability).

Culture & Benefits

• Real technical ownership: You will play a key role in shaping the architecture of a production system, used by real customers.
• Direct collaboration with the founders: As part of a small team, your ideas and technical decisions will have immediate impact.
• Flexible working environment with flexible working hours and a centrally located office.