AI Architect (Applied AI Engineer)

Role Overview

As an AI Architect, you’ll report to the Head AI Architect and work hands-on with our creative, product, and engineering teams to design and build the AI systems behind our generative video platform. This is a hands-on architecture role at the frontier of applied AI: you’ll sit with stakeholders, translate their ideas into agentic systems in real time, and build and ship them yourself. You’ll also own how we measure and improve those systems, keeping a close read on how everything performs in production.

What you'll do

• Design and build agentic systems: Create and maintain the AI agent workflows and orchestration pipelines that power the platform, using Mastra, n8n, or the right tool for the job.
• Sit in working sessions with creative and product stakeholders, gather requirements on the fly, and translate them into working AI systems.
• Craft and refine the intelligence: Write, test, and iteratively improve prompts and multi-step systems, creative generators, evaluation/judging panels, and guardrail checks.
• Own observability and evals: Manage prompts and traces in Weave (or a comparable tool), craft and run evals, and meet with product stakeholders to understand how prompts are performing.
• Make the architecture calls: Decide when to use agents vs. workflows, where logic should live, and how to keep systems flexible as the product evolves.

Who you are

• Experienced engineer: 5+ years in software engineering, including 2+ years building and shipping LLM-powered or agentic systems in production.
• Agentic system builder: You’ve designed and shipped LLM agent systems end-to-end and understand the difference between agents and workflows, orchestration, tool use, and memory.
• Prompt engineer: You can reliably shape an LLM’s behavior, personality, and output, and you’ve built evaluation, judging, or guardrail systems to keep quality high.
• Observability-minded: Hands-on experience running evals and tracing LLM systems; familiarity with Weave (Weights & Biases) or a comparable tool is a strong plus.
• Fluent in code: Proficient in TypeScript / JavaScript and Node.js, and an active user of AI-assisted coding tools like Cursor or Claude Code.
• Framework-flexible: Experience with Mastra or an equivalent agent-orchestration framework and workflow tools like n8n (Mastra itself is a nice-to-have, it’s new and quick to pick up).
• Multi-model: Familiar with multiple LLM providers (Claude, GPT, Gemini) and how model choice shapes output.

BENEFITS OVERVIEW

• Full remote within the US
• 100% employer-paid medical, dental and disability, with vision option
• Traditional and Roth 401(k) with a 4% company match
• Flexible paid time off, 9 paid holidays plus 2 floating holidays
• Paid parental leave
• Annual office supply allowance, monthly internet stipend and employer-paid cell phone
• Opportunities to connect virtually and in-person twice a year with our fully remote team

ADDITIONAL INFORMATION

• We want applications from everyone, regardless of race, creed, color, religion, sex, sexual orientation, gender identity, national origin, marital status, citizen status, age, disability, military or protected veteran status, genetic predisposition or carrier status or any other legally protected status.
• The remote-friendly work model supports flexibility across the US, however we are currently unable to support employment in California.
• We are unable to consider applications from candidates who live outside of the US.
• At this time, we're not considering candidates that need any type of immigration sponsorship (additional work authorization or permanent work authorization) now or in the future. This includes, but is not limited to: F1-OPT, F1-CPT, H-1B, TN, L-1, J-1, O-1, etc.
• The application for this position may request a short, job relevant assessment as part of our multi-stage interview process. Reasonable accommodations are available for this assessment, please reach out to talentteam@markarch.com.
• The actual base pay is dependent upon many factors, such as training, transferable skills, work experience, business needs, location and market demands. The base pay range is subject to change and may be modified in the future.