Senior Software Engineer

16 hours ago

Greater Sydney Area, Australia Prefactor Full time

Prefactor is the Native MCP Identity Layer for modern SaaS - We're hiring Engineers.

Prefactor was founded to solve the identity challenges of the AI era; where users are AI Agents, APIs, and automation. Prefactor provides a new foundation: first-class, auditable, version-controlled identity for AI Agents and automation. This isn't just innovation. It's infrastructure for the next era of software.

Why is it an exciting time to join Prefactor as an Engineer?

  • Define a New CategoryYou'll be building foundational infrastructure for AI agents, essentially the "Okta for Agents."
  • Solve Unanswered Questions: This is a rapidly evolving, undefined space. You will be at the forefront, contributing to what could become the new industry standard for interaction and automation via Model Context Protocol (MCP).
  • Build in a Moving-Target Environment: The MCP spec is fast-moving. This role requires an experienced, pragmatic, and passionate engineers who thrive on technical challenges and innovation.
  • Elixir Tech Stack: We're building on Elixir and would love you to have an awareness or interest in it, but it's not essential as long as you can pick it.

We're hiring Senior Engineers

Here's some things you can help us achieve:

  • End-to-End Ownership: Independently design, build, and deploy a completely new, major feature of the product from scratch. You will leave a significant personal stamp on the product.
  • Become the Expert: Develop deep expertise in core areas of our system, becoming the go-to person for those components.
  • Technical & Cultural Contributor: Actively contribute to the overall technical strategy and help shape a culture of innovation, speed, and quality. Be the engineer the team can't imagine building Prefactor without.
  • Some Examples of things you can build with us:
  • Model and build complex workflows for agent authorisation.
  • Develop a robust audit system to monitor all agent activity.
  • Engineer systems for ingesting, processing, and securely storing large datasets.
  • Build and manage a highly stable and scalable decision and authorisation engine.

The Skills and Experience you'll bring

We're looking for Senior Engineers who can bring as much experience as possible in these areas:

  • Stage-Appropriate Skillset: You thrive in early-stage, small-team environments. Comfortable making decisions with autonomy, fixing what you've built, and building for the future. Crucially, you'll help us focus on building what's essential now, vs what's still a great idea but something that we can build later.
  • Proven Backend Product Experience: You have a significant track record of building complex, back-end-heavy products. You simplify complexity and communicate it effectively.
  • Project Ownership: Demonstrable experience owning projects end-to-end, from ideation to deployment and stakeholder management. You have a history of making things demonstrably better.
  • Pragmatic: You are an experienced, pragmatic engineer who provides a healthy pushback on assumptions and isn't swayed by hype.

Technical Skillset

Ideal: Experience with Elixir and an interest in the MCP space is highly beneficial but not essential.

  • Required Back-End Experience: Strong proficiency in one or more back-end languages like Go, Ruby, Scala, Rust, or similar. A mixed experience is highly valued.
  • Cloud & Infrastructure: Hands-on experience with AWS. You've had responsibility for deploying and managing applications and infrastructure.
  • Containerization: Proficient with Docker.
  • Confident with JavaScript and building UIs

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