Senior Backend Engineer (Platform & Architecture) - AppSec Solution

Description OX Security is securing the AI-driven SDLC from prompt to production. We're building the next generation of security technology for a world where AI is changing how software is built, deployed, and attacked. We're growing fast and looking for a Senior Backend Engineer to join our AppSec Solution group, home of OX's core platform, and play a key role in shaping the architecture and infrastructure the whole product runs on. This is a high-impact, cross-functional role where you'll work closely with our Software Architect, team leads across R&D, DevOps and Product, helping us build the foundations for what comes next, including running AI agents inside the product at scale. If you're independent, opinionated and love turning a design on a whiteboard into a production system, we'd love to meet you. Responsibilities What You'll Be Doing Own cross-company infrastructure and architecture projects end-to-end with our Software Architect, from design through adoption across teams Build and own the shared foundations and standards our services are built on Lead the evolution of our data layer as our largest customers scale Build the platform foundations for running AI agents inside the OX product Drive cost optimization from the application side, including how our services scale on Kubernetes Raise the reliability and observability bar across our services Lead how R&D builds with AI, so AI-assisted development is fast and meets our engineering standards Lead technica