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 looking for a strong Senior Backend Engineer to join VIBESEC, the team building our AI security products. This is one of the most exciting places to be at OX right now: a brand new product, in a domain that changes every single day, with real customers already shaping what we build next.
You'll join a small, senior, globally distributed team of six engineers across Europe, Israel and Argentina. You'll own features end to end, from the first conversation with Product through design, build and production. Because the domain is new, your technical judgment will shape the architecture rather than follow it.
If you want to build something genuinely new, at the point where AI and security meet, let's talk.

What You'll Be Doing
- Design and build the backend of our AI security products in Node.js and TypeScript, running across cloud environments and endpoints




- Own features end to end, from business requirements through architecture, implementation, delivery and production quality
- Work closely with Product and directly with customers, turning fast-moving business needs into robust technical solutions
- Partner with Product, Design, and other engineering teams on complex cross-company projects
- Make and defend architectural decisions in a domain with no established playbook, where the right answer this quarter may not be the right answer next quarter
- Set the technical bar for a senior team, and raise it through code reviews, design discussions and examples

What We're Looking For
- 6+ years of hands-on backend development experience
- Strong, production-level experience with Node.js and TypeScript (must-have)
- Proven ability to design and deliver solutions for complex, distributed systems
- Strong ownership and accountability, with high independence and the

📌 Senior Backend Engineer (Buenos Aires)
🏢 OX Security
📍 Buenos Aires