AI Engineer

Managing human capital is one of the most complex challenges in modern business: constantly shifting priorities, evolving skills, and siloed systems make optimization nearly impossible.

Mosaic is the first AI resource manager built to continuously plan and optimize how people and agent resources are utilized across an organization. The category is expanding rapidly, with 20–25% CAGR today and adjacent automation markets growing 40%+ annually.

Mosaic forecasts workload, revenue, and headcount, simulates staffing scenarios, and automatically adapts plans as reality changes- creating a self-optimizing workforce system at enterprise scale.

Mosaic ranked #813 on the 2026 Inc. 5000 Fastest Growing Companies in America ($454 in 2025, #226 in 2024, #23 in New York, #25 in software). Now, we're scaling to serve large enterprises that demand intelligent workforce orchestration at scale.

And the results speak for themselves: 25% of companies using Mosaic for planning have their most profitable year ever, unlocking millions in profit from the same headcount.

We are founder led, Series A, with a team of over 60 and growing. We are headquarted in New York City with additional hybrid offices in San Francisco, Toronto and Vancouver.

The role

Location: SF Hybrid (in-office schedule TBD)

Compensation: $200-300k

Reports to: CTO, Zan Doan

You’ll have

• Over 5 years of experience in engineering- Full Stack, Back or Front End
• Experience working with a variety of AI systems
• Strong engineering fundamentals with curiosity, business awareness, and the ability to iterate quickly

Bonus points for

• Curious thinkers and builders
• Your ability to thrive on ownership and collaboration with a small team

What you'll do

• Be a hands-on builder, an engineer who understands and works first from AI
• Use AI as a core development partner; leveraging AI agents and tools to accelerate delivery, raise quality, and iterate faster
• You won't work in isolation; you'll be a key contributor on a small, high-impact AI team, partnering with business stakeholders and AI leaders across the organization
• Contribute across the stack as needed: data pipelines, APIs, integrations, and application logic
• Work inside AI-driven development workflows (generate, review, refine) to produce high-quality deliverables
• Review and validate AI-generated code, queries, and designs for accuracy and scalability

Benefits

• Competitive medical, dental, and vision policies including FSA and HSA
• 401(k) plan with employer match
• Series A Options in a high growth startup
• Unlimited PTO
• Team off-sites and get togethers