Unusual Ventures
Staff/Senior Software Engineer, Agent Engineering (Helios)
- Location
- New York, NY, US
- Arrangement
- On-site
- Employment type
- Full-time
- Level
- Staff
- Posted
- 16 September 2026 (14 days ago)
Checked 13 days agoApplications go to the employer, never to RoleSprint
About this role
Expected areas of expertise: • Production orchestration for stateful, long-running, and multi-agent workflows.
• Tool and action infrastructure with strong contracts, permissions, and approval boundaries.
• Retrieval, context engineering, evidence management, and persistent agent memory.
• Model-runtime engineering across providers, latency profiles, and deployment environments.
• Evaluation, tracing, security, and operational control of nondeterministic systems.
KEY RESPONSIBILITIES • Own Proxi’s agent runtime and strengthen foundations for building new agent-driven products.
• Build the systems that allow agents to own long-running work from assignment through completion. Agent activity should remain visible, steerable, and connected to the relevant project, people, evidence, deadlines, and deliverables in Action Rail.
• Build the tool and action framework agents use to interact with internal systems and external services safely.
• Connect agents to Proxi’s retrieval and knowledge systems so reasoning, memory, citations, and generated artifacts remain grounded in authoritative evidence.
• Improve the evaluation and release discipline for agent behavior, traces and simulations to improve quality while controlling latency, cost, and risk.
NICE TO HAVE • Experience deploying agent systems in government, defense, legal, healthcare, or other regulated environments.
• Familiarity with policy and legal research where temporal accuracy, provenance, and citation precision are essential.
• Experience operating self-hosted or multi-provider inference in restricted environments.
• Experience building agents that create durable artifacts or perform permissioned actions on a user’s behalf.
Work location
- New York, NY, US
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About this listing
Published on Lever under the board identifier Unusual, which is the name the employer’s own job board carries. RoleSprint has not verified the company’s registered or trading name, so it is shown exactly as published rather than tidied up.
RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.
Published 16 September 2026, last checked 13 days ago. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.