Staff Engineer — Performance, Reliability & AI Automation (Barcelona)

Overview

Your role as a Staff Software Engineer on Factorial’s DX and Performance team focuses on performance, reliability, observability, load testing, and AI‑assisted engineering workflows across our product and infrastructure.

Responsibilities

• Define and evolve SLIs and SLOs for critical product journeys.
• Improve and standardize observability, dashboards, and service‑health visibility across teams.
• Investigate bottlenecks and regressions across application, database, asynchronous, and system layers.
• Drive improvements in latency, throughput, scalability, and reliability.
• Build structured load‑testing workflows for critical paths.
• Help teams validate system behavior under realistic traffic, concurrency, and tenant‑scale conditions.
• Analyze capacity, saturation, and behavior under peak load and growth scenarios.
• Define practices and tooling to prevent performance regressions before produ...