LLM Application Engineer

Concentrate AI provides a unified, OpenAI-compatible API to access, route, and manage LLMs. We save our customers time, cut costs, and reduce risk. We manage high-volume AI traffic and logs.

We’re seed-stage, well-funded, and in stealth. This role is fully remote.

The Role

Build, run, and debug LLM applications on top of Concentrate. You’ll work on production workloads (customer-facing and internal), stress test the platform, and share feedback and learnings with the product team.

We move quickly, debate things, and work long hours.

Key Areas of Responsibility:

• Build LLM-powered services, workflows, and applications using Concentrate
• Integrate with real production applications and environments
• Design reliable interactions with LLMs (OpenAI, Anthropic, Gemini, OSS), including prompts, tool calling, evals, and guardrails
• Debug failures across models, APIs, and infrastructure
• Write code, scripts, and small tools to test system behavior at scale

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• Reproduce bugs, isolate root causes, and clearly document findings
• Drive improvements to APIs, defaults, and overall developer experience

What We’re Looking for

• Hands-on experience integrating LLMs via APIs in production
• Always building tools, scripts, side projects, or experiments to test ideas and learn fast
• Strong Python; TypeScript is a plus
• Comfortable with REST APIs, async systems, and production debugging
• Curious about model behavior under load, failure, and edge cases
• Familiarity with tool calling, agents, multi-step workflows, or MCPs
• Strong code quality and technical judgment
• Comfortable operating in early-stage environments with speed and ambiguity
• Clear async communication (Slack, written updates, concise docs)
• Fluent written and verbal English required for documentation, incident response, and technical and business presentations.

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• Bonus: active open-source contributor

Comp: Base + bonus + meaningful equity

Equal Opportunity & Fair Chance Notice

Concentrate AI is an affirmative action and equal opportunity employer. We are committed to providing equal employment opportunities and do not discriminate in recruiting, hiring, training, promotion, or other employment practices on the basis of race, color, sex, age, religion, national origin, ancestry, protected veteran status, disability, sexual orientation, gender identity or expression, genetic information, or any other status protected by applicable law.

Qualified applicants with arrest and conviction records will be considered in accordance with the San Francisco Fair Chance Ordinance and applicable state and local laws.

California Privacy Notice

California residents may contact privacy@concentrate.ai for additional information regarding how we collect, use, and disclose personal information during the job application process.

Recruitment Agency Notice

Concentrate AI does not accept unsolicited resumes from recruitment agencies and is not responsible for any fees related to unsolicited submissions.