Imunify360 is a leading developer of Linux infrastructure and security solutions. Our flagship product, Imunify360, is a comprehensive security suite that protects thousands of shared hosting environments, VPS, and dedicated servers worldwide. Our clients include industry giants such as Dell, GoDaddy, IBM, and Zoom, with over 4,500 customers globally. The company has more than 250 employees.
We are looking for an engineer-architect to build a new product from scratch. This is not a position within an existing team—you will single-handedly create a runtime protection layer for Node.js applications. The hosting market is rapidly adopting Node.js, and modern applications are increasingly generated by users with AI tools and little technical security expertise. Your mission is to make protection automatic, transparent to client code, and effective in real time.
This is a role with the highest level of ownership (Senior / Staff / Architect level), where you will make key architectural decisions and take full responsibility for the outcome.

Responsibilities




Define the technical approach for building runtime protection inside the Node.js process.
Design the detection logic to identify and block attacks during application execution.
Build and launch the first version of the product in real production environments.
Ensure the protection works without requiring changes to client code and without breaking legitimate applications.
Continuously improve the product based on telemetry, production feedback, and real-world incidents.
Achieve target values across four key metrics:
Runtime overhead
False positives
False negatives
Customer escalation volume
The top priority is Security, not just Node.js. Security experience outweighs general backend tenure.
Must-have:
Experience in Security Engineering or Security Research (deep understanding of attack vectors and defense methods).
Have independently built and shipped a product/solution from scratch (end-to-end ownership: from idea to

📌 Security Engineer (Argentina)
🏢 Alex Staff Agency
📍 Argentina