L1 Prompt Engineer, Agent Builds & Training jobs in United States
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Nimbus · 1 month ago

L1 Prompt Engineer, Agent Builds & Training

positionSeattle, WA
timeFull-time
remoteHybrid
seniorityNew Grad, Entry Level
money$60K/yr - $90K/yr

Nimbus AI is a company that builds the fastest way for companies to create, train, and resell branded conversational and workflow agents. They are seeking a Prompt Engineer to design, optimize, and maintain the prompts and training structures for their AI systems, collaborating across teams to enhance agent performance.

Computer Software
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H1B Sponsor Likelynote

Responsibilities

Prompt design & optimization for conversational agents, workflow automations, and partner-specific models
Training loop development —structuring data, crafting examples, writing evaluation prompts, and improving model reliability
Agent behavior tuning to ensure consistent voice, accuracy, guardrails, and performance across multiple verticals
Experimentation frameworks to test model variants, evaluate outputs, and iterate based on quant/qual insights
Content & instruction authoring for onboarding flows, tools, action schemas, and dataset expansion
Cross-functional collaboration with product, design, engineering, and GTM teams to ship agent improvements fast

Qualification

Prompt designTraining loop developmentLLM experienceAnalytical skillsTechnical tools proficiencyCuriosityWritten communicationCollaboration skills

Required

Experience crafting prompts, building workflows, or working with LLMs in real applications
Strong analytical instincts—comfortable evaluating model outputs, identifying failure patterns, and proposing fixes
Ability to turn complex workflows into structured instructions, edge-case examples, and scalable prompt patterns
Curiosity and a builder mindset: you test, iterate, document, and refine continuously
Comfort working with basic technical tools (APIs, JSON, dev environments) — deeper engineering experience is a plus but not required
Excellent written communication; you're able to write crisp, structured, well-scoped prompts that drive predictable behavior

Company

Nimbus

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Designing conversational flows is tedious, error-prone, and rarely scalable.
dateFounded in 2025
people-size11-50 employees
web-link
https://nmbs.ai

H1B Sponsorship

Nimbus has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2022 (2)

Funding

Current Stage
Early Stage
Company data provided by crunchbase