In-Demand Staff ai application security Jobs

Staff AI Application Security Engineer
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Staff AI Application Security Engineer

Relevance AI
Sydney NSW

Apply Now

Job Details

Full-time
6 days ago

Benefits

Parental leave
Free snacks
Employee assistance program

Qualifications

MCP
MongoDB
AWS
PostgreSQL
Terrafrom
APIs
AI

Full Job Description

Location Sydney, AU, Hybrid (3 days in office required)

About Us

At Relevance AI, we're building the home of the AI workforce. Our mission is simple: empower every team to delegate meaningful work to AI agents that think, act, and collaborate like experts.

With Relevance AI, anyone can create and manage intelligent agents that handle workflows, decisions, and collaboration - all within one unified platform. Our technology already powers industry leaders such as Canva, Databricks, Confluent, Autodesk, Lightspeed and Rakuten, helping them scale excellence across operations, marketing, and sales.

We're backed by Bessemer Venture Partners and raised our Series B in April 2025 to accelerate growth and push the boundaries of agentic automation. Headquartered in San Francisco and Sydney, we operate on a hybrid model and thrive on curiosity, collaboration, and execution - we move fast, think big, and win together.

If you want to define how the world works with AI, join us.

The Role

Our engineering team works at the frontier of AI-native software development - where curiosity, product thinking, rapid experimentation, taste and judgement are embedded in our ways of working.

As our Staff Application Security Engineer, you'll be the specialist behind application and product security for a platform of autonomous agents that plan, decide and act on behalf of enterprise customers.

This is a new threat surface. The established AppSec playbook still applies to our product, our APIs and our production environment - but stops well short of the harder questions. How do you let an agent act on real work without it going off the rails? How do you contain prompt injection when a model can't reliably tell instructions from data?

Enterprises won't hand real work to agents they can't trust. That makes security a reason customers choose our product, and we invest in it accordingly.

This is a specialist IC seat reporting to our Head of Engineering. No direct reports, and no handing a list of vulnerabilities to other engineers to fix.

We'll sponsor relocation to Sydney, and would like to hear from you if you're in the UK or Europe and looking to move.

How We Build

AI engineering (coding agents, loops, eval) is core to every engineer's workflow.
Engineers own product areas and customer problems end-to-end.
We prototype quickly, validate with customers, and ship continuously.
We care about product impact as much as technical quality.

Your Impact

Migrate access control to our new model, and close any gaps.
Secure the product surface: authn/authz, API security, input and output handling, supply-chain risk.
Build the guardrails that let agents act safely: permissions, attribution, sandboxing, tool-use limits, prompt-injection defence.
Establish least-privilege access across production, and make the secure path the fast path.
Longer term, take us towards an autonomous security team: agents that continuously scan the platform and the code we ship, and help remediate what they find.

Who We're Looking For

While depth of experience is important, how you think matters more. In priority order:

A view on agentic security. You've thought about what security means when agents do the work, not humans.
AppSec depth on a production platform: authn/authz, API security, secure design and review, supply-chain risk. This is the core skill set we are hiring you for.
Hands-on ownership. You'd rather fix it than report it.
Systems thinking. You can talk through how an end-to-end autonomous system should be designed, and where it breaks.
The basics for our stack: TypeScript, AWS, MCP, and AI engineering fundamentals - tool use, context, evals.
Comfortable building with agents. It's how the whole team works. If you're not there yet you'll learn it here, but you need to want to.

This is a hands-on building role, and a deliberately specialist one. If you want to make security a product strength, build quickly, and stay close to the code, you'll enjoy it here.

Our Tech Stack (so far)

TypeScript and AWS you'll use from day one. Beyond those, what matters is how fast you pick up a new stack.

Frontend: React, Vue.js, Typescript
Backend: Express.js, Node.js, Typescript, Python
Database: PostgreSQL, MongoDB
Cloud Infrastructure: AWS, Vercel, Terraform, Kubernetes
Agents and tooling: MCP, Dapr
AI Coding Tools: Claude Code, Cursor, Codex and more

Why Join Us?

We've set high standards in a high-trust, low-ego environment, and we hire exceptional people to do the best work of their lives. In return: competitive salary, equity, and career-defining scope. As an early team member you'll shape our culture and ways of working, not inherit them.
We’re guided by our six principles: eyes on the prize, work on the factory - not just in it, be truth-seeking, know your customer by name, let's find a way, and momentum matters.

Meet Some of The Team

Paulwyn, Head of Engineering
Peter, Engineering Manager

Benefits

ESOP – Employee Stock Ownership Plan so you can grow with the company
AI Productivity Benefit – Get up to $1200 USD/year to spend on AI tools that help you work smarter and grow your skills
Parental Leave – We offer 12 weeks of paid parental leave for all eligible new parents, and an additional 6 weeks for the birthing parent
Milestone Merch – Celebrate your work anniversaries with customised Relevance AI swag
Food, Drinks & Community – Enjoy catered lunches every Tuesday, Thursday and Friday with your teammates, plus Uber Eats dinners if you end up working late. Stay energised with free breakfasts, healthy snacks, and a fully stocked fridge of drinks
Quarterly Team Events – Build stronger connections through fun, meaningful team bonding experiences every quarter
Social Clubs – Share your hobbies and interests by joining or starting a club with your teammates. From hiking and chess to board game nights and social committee activities—there's something for everyone!
Sonder EAP – Access 24/7 mental health and wellbeing support through Sonder, our Employee Assistance Program.

#LI-Hybrid

Apply Now

Refine Your Search

staff ai application security jobs

Staff AI Application Security Engineer

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