Applied AI Engineer at OpenRouter

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OpenRouter is hiring a applied ai engineer focused on applied AI product engineering.

OpenRouter

Location: Remote
Employment: FullTime
Work arrangement: remote

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Role overview

The Applied AI Engineer opening at OpenRouter is centered on Design, build or operate software and workflows for applied AI product engineering. The employer also lists Collaborate with product, engineering, customer and operations stakeholders. and Improve reliability, performance, testing, automation and documentation. These responsibilities define the practical scope more clearly than the job title: applicants should be ready to explain what they have built, supported or delivered that relates directly to this work. The listing summary says: OpenRouter is hiring a applied ai engineer focused on applied AI product engineering. The source material available for this page does not provide a complete technology list.

The posting identifies Build-over-buy conviction. You build on internal tools first and champion them over polished external options, even when the internal path is slightly more painful. You… and You push the last 20%. You've worked on internally-built tooling and made it good enough that people chose it. You're energized by reliability, edge cases, and polish,… as relevant qualifications. Candidates should connect these requirements to evidence from their own work, including their individual contribution, technical decisions and outcomes. The listing describes the work arrangement as remote and gives the location as Remote (US) / United States. Confirm country eligibility, travel, employment terms and any details absent from this summary directly with OpenRouter before applying. This overview is based on the employer-provided posting; it does not infer team structure or expectations that the source does not state.

Responsibilities

Design, build or operate software and workflows for applied AI product engineering.
Collaborate with product, engineering, customer and operations stakeholders.
Improve reliability, performance, testing, automation and documentation.
Translate technical and customer requirements into maintainable systems.

Qualifications

Build-over-buy conviction. You build on internal tools first and champion them over polished external options, even when the internal path is slightly more painful. You buy only for genuine expertise, never for something buildable in a day.
You push the last 20%. You've worked on internally-built tooling and made it good enough that people chose it. You're energized by reliability, edge cases, and polish, and you don't delegate the hard part.
Domain fluency in support or GTM. Hands-on with ticketing, CRM, sales ops, or customer-facing workflows, so you know which work is actually worth automating.
Architectural range. You understand systems end-to-end and can jump into any part of one. Deep backend orientation; front-end work is not the point here.
A security mindset. You'll be building integrations with broad internal access. You think about permissions, blast radius, and the second-order effects of what an agent is about to do before it does it.
Evals and data rigor. You measure automation impact quantitatively rather than asserting it.
Excellence, time-boxed. A near-perfect bar, but disciplined enough to ship rather than polish forever.
Experience across three or more agent harnesses. We don't need expertise in any one of them; we want to see that you've tried things.
You've built your own agent harness for a workflow
Production LLM/agentic systems shipped with strong engineering fundamentals
Open-source contributions to dev tooling or agent frameworks
If you don't think you meet all of the criteria below but still are interested in the job, please apply. Nobody checks every box, and we're looking for someone who is excited to join the team.

Technology in this role

Go: We're hiring two Applied AI Engineers to build the internal agentic tooling that runs OpenRouter — one focused on support, one focused on .
LLM: You've built your own agent harness for a workflow Production LLM/agentic systems shipped with strong engineering fundamentals Open-source contributions to dev tooling or agent frameworks If you don't think you meet all of the criteria below but still are interested in the job, .
CAN: You understand systems end-to-end and can jump into any part of .

Role-specific candidate guide

Preparation notes based on the employer’s stated responsibilities and qualifications.

Understanding the scope. This Applied AI Engineer position at OpenRouter is best assessed through the work described in the employer’s posting, rather than the title alone. The available role overview says: “The Applied AI Engineer opening at OpenRouter is centered on Design, build or operate software and workflows for applied AI product engineering. The employer also lists Collaborate with product, engineering, customer…” Read that statement together with the responsibilities below to understand the likely balance between delivery, coordination and technical decision-making. The role belongs to the AI and data area, but that label is only a guide to the work; the employer’s own requirements remain decisive. Before applying, check the original listing for reporting lines, product or team assignment, employment.

Benefits

US-remote arrangement as stated in the official posting.
Opportunity to work on AI and enterprise technology products.

About OpenRouter

OpenRouter is the AI routing and infrastructure layer that AI builders, AI-native startups, and enterprises use to access, manage, and optimize their AI usage through a unified API, billing interface, and analytics platform. We route billions of tokens every month and sit at the center of how organizations operationalize LLMs across research, product, and production workloads.

We are a small team that punches above its weight. Every person here has direct impact on the product and our users.

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