HITL Senior Software Engineer; Code Audit + Fix Verification

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Plex Aura, the team behind Curb Score, builds AI technologies that uncover insights humans might miss—then makes those insights actionable. We’re transforming industries like transportation logistics, legal automation, and enterprise security by removing inefficiencies and improving decision‑making.

Starting in the $500B property intelligence market, Curb Score leverages visual data to deliver predictive analytics, reduce losses, and optimize ROI. In parallel, we’re building Sentinel Layer, an audit layer designed to help engineering teams identify what’s easy to miss in modern software—especially in an era where AI is generating code at unprecedented speed.

Our mission: replace analog thinking and guesswork with data‑driven intelligence for high‑value decisions—without compromising reliability, security, or scalability.

AI “vibe coding” has changed the game. Teams can ship faster than ever—but they’re also generating massive volumes of code with inconsistent quality: hidden edge cases, brittle architecture, security gaps, performance regressions, and test suites that don’t actually protect production.

The bottleneck is no longer “can we build it?”

It’s “can we trust it—before we deploy, scale, or go through investor diligence?”

That’s where Human‑in‑the‑Loop (HITL) becomes essential.

Sentinel Layer helps surface issues that standard tooling and rushed reviews miss. Your job is to apply senior engineering judgment—validate what matters, confirm fixes, and ensure production readiness with a consistent high bar.

We’re hiring Senior HITL Software Engineers who can rapidly assess code quality, correctness, security posture, and scalability—and then either:

• Recommend precise fixes
• Implement / verify fixes directly (depending on the engagement)

This is a remote role with two paths:

• Designed for senior engineers who do not want to leave their current job. We intentionally scope work so it can fit alongside a demanding role—short, high‑signal audits, targeted remediation, and clear deliverables. You must be able to moonlight in compliance with your employer’s policies and avoid conflicts of interest / IP restrictions.
• We’re also hiring a small number of forward‑deployed engineers who will act as the technical HITL lead for specific customer accounts—consulting‑style, client‑facing, owning outcomes end‑to‑end. This is a new category: part audit lead, part systems engineer, part trusted advisor.

• Audit AI‑generated and human‑written code for correctness, reliability, security, scalability, and maintainability.
• Use Sentinel Layer’s audit tooling to surface risk hotspots (without relying on it blindly), then apply deep engineering judgment to validate and prioritize.
• Verify fixes: confirm that remediation actually resolves the issue and doesn’t introduce regressions.
• Create clear, actionable outputs:
  • Risk summaries (engineering + exec‑friendly)
  • Investor DD / technical diligence support
  • Support multiple customer “packs” and engagement styles—ranging from quick audits to deeper architecture reviews—without revealing internal methods or proprietary workflows.
• When needed, help teams:
  • Scale to higher user loads
  • Improve CI/CD and test strategy
  • Refactor or rebuild parts of the product with a FAANG‑grade bar.

• Demonstrably senior SWE ability across major SWE spaces (backend, infra, systems design, testing strategy, performance, security fundamentals).
• Strong code review and debugging instincts—ability to spot subtle issues, not just style problems.
• Clear written communication (you can explain impact and tradeoffs fast).
• Independent execution in a remote environment.

• Proven, extensive audit / QA / code review leadership experience (high bar, high volume, high accountability environments).

We prioritize candidates from programs such as:

• MIT
• Stanford
• Carnegie Mellon
• UC Berkeley
• Caltech
• Princeton
• Harvard
• Cornell
• UI…