Backend Engineer, Sr. (Python)

Location: Zürich, Zürich, Switzerland (Remote)

Posted: September 14, 2026

Salary: EUR 120–180 (period not specified)

### About Scalera

Scalera is an ETH Zurich spin-off building AI-powered procurement software for the European construction industry. Its platform automates supplier selection, tender management, and bid evaluation, serving 110 customers across Switzerland, Austria, and Germany.

### Role

As a Senior Backend Engineer (Python), you will build and maintain backend services and APIs powering Scalera’s AI-driven procurement platform. You’ll work closely with the CTO and VP Engineering on AI production workflows, complex datasets, integrations, and platform reliability.

### Responsibilities

• Own backend problems end-to-end, from understanding user needs to delivering solutions.
• Build and maintain Python backend services supporting AI capabilities such as document parsing, supplier matching, and bid scoring.
• Design and implement RESTful APIs and integrations with frontend applications and external platforms.
• Develop data pipelines to ingest, normalize, and process structured and unstructured construction data.
• Participate in code reviews, testing, and CI/CD practices.
• Explore and contribute ideas for applying new AI techniques to procurement challenges.
• Work effectively in ambiguous environments by scoping, prioritizing, and delivering solutions.

### Required Qualifications

• 4 years of backend engineering experience.
• Python as a primary programming language.
• Strong API design and RESTful systems experience.
• Production experience with FastAPI or Django.
• Solid knowledge of databases, data modeling, and query optimization.
• Experience with CI/CD and strong focus on code quality and maintainability.
• Interest in AI/ML systems and their behavior in production.
• Strong communication and teamwork skills.
• Ability to work independently and make progress without perfect clarity.

### Preferred Qualifications

• Experience with GCP, including Cloud Run, BigQuery, Pub/Sub, or similar services.
• Experience with data-heavy or AI-integrated product architectures.
• Familiarity with AI developer tools such as Cursor, Claude, or Copilot.
• B2B SaaS, construction technology, or procurement domain experience.
• German language skills.

### Work Arrangement & Benefits

• Zürich headquarters.
• Four days in-office with Fridays remote.
• Small, collaborative team with minimal bureaucracy.
• Direct collaboration with decision-makers.
• Competitive salary and equity.

### Employment Details

• Employment type: Not specified.
• Working hours: Not specified.
• Salary period: Not specified.

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