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# Software Engineer

- **Company:** Petual LLC
- **Location:** San Francisco, CA, United States
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Cloud Computing, Customer Data Management, Data Integrity, Distributed Systems, Systems Architecture, Large Language Models, Backend, Kubernetes, Infrastructure Automation Frameworks, Front End Software Development
- **Published:** October 13, 2026
- **Apply:** https://www.juju.com/job/16_84cc706d1

## About the Role

* Experience building on LLMs and agentic systems: harnesses, long-horizon agents, evals, or resilient workflows that survive contact with messy real-world input
 * Experience building enterprise SaaS products that handle sensitive customer data
 * Comfort working across the stack: solid backend fundamentals (APIs, data modeling, distributed systems) plus enough frontend fluency to ship a feature end to end
 * Experience with AWS, Kubernetes, and infrastructure as code
 * Experience in fintech, audit, governance, risk, compliance, or another regulated environment
 * A track record of high ownership at an early- or growth-stage startup, where you shaped not just the code but the product and the process around it

## Description

* Own the agent harness at the core of the product: the workflows, checkpoints, and evaluation that keep long-horizon agents reliable across hours of testing
 * Design and own the backend services and APIs that carry evidence from ingestion, through analysis, to auditor-ready output
 * Build integrations with the systems our customers keep evidence in: cloud infrastructure, identity providers, ticketing systems, ERPs, and more
 * Design the data models and system architecture that have to hold up as our customer base and control volume grow
 * Write code and design systems with security and data integrity in mind, given the sensitivity of the evidence our customers share with us
 * Partner directly with our customers to craft and ship the features that matter most to the people actually doing the testing