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# Senior Backend Engineer

- **Company:** Clera
- **Location:** München, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), User Authentication, Data Systems, Linux, Programming Tools, Distributed Systems, Python (Programming Language), Linux Kernel, Routing, OAuth, Autoscaling, Backend, Agentic-AI, Webhooks, Api Management
- **Published:** October 22, 2026
- **Apply:** https://www.adzuna.de/details/5936901458

## About the Role

* 3 to 10+ years of experience building and operating production backend systems.
 * Strong experience with distributed systems, production reliability, and designing for failure at scale.
 * Hands-on expertise with sandboxing and OS-level isolation, including containers, Linux internals, and safely running untrusted code.
 * Experience building Python services and working with infrastructure such as Modal.
 * Practical experience with OAuth, webhooks, rate limits, and third-party API integrations.
 * Experience designing multi-tenant systems, with strong instincts for durability, cost, and limiting the impact of failures.
 * Background in infrastructure, platform, developer tools, or code execution systems, and an ability to learn and ship in a fast-moving environment.

## Description

Build and operate the backend systems that help AI agents reliably carry out work through connected tools. You will own core infrastructure across integrations, secure execution environments, and multi-tenant data, with a direct impact on product reliability and customer outcomes.
What You'll Do

 * Design and operate a tool gateway that exposes connected APIs and MCPs through a composable Python SDK, including routing, authentication, rate limits, and reliability.
 * Run persistent, isolated Linux sandboxes for workspaces, with attention to security, autoscaling, and cost.
 * Build and maintain durable, high-performance data systems for multi-tenant workspace state and persistence.
 * Find and resolve integration failures, then improve system design to prevent them from recurring.
 * Work closely with company leadership and users to make technical decisions and deliver improvements quickly.