Principal AI Engineer

iFIT’s vision is to create the world's most holistic health and fitness platform, integrating all elements of health - physical fitness, mental health, nutrition and active recovery - into a seamless interactive experience. We develop proprietary software that learns and adjusts to the habits of each person as it delivers immersive content that guides them on their own individual fitness journey.

We are seeking a high-leverage Principal AI Engineer to join our team as a remote technical lead. The ideal candidate has a proven track record of architecting and operationalizing sophisticated multi-agent systems and possesses the deep expertise required to scale agentic intelligence in a global production environment.

ROLE COMMITMENTS

• Lead the Architectural Evolution of the AI Coach: Serve as a primary architect for iFIT’s AI Coach, transforming it into the industry-standard holistic health and fitness ecosystem.
• Engineer High-Fidelity Consumer Experiences: Design and deploy nuanced, hyper-personalized AI interactions that drive long-term user retention and value.
• Pioneer the Future of Connected Health: Command cutting-edge Generative AI research to develop proprietary features that redefine the boundaries of the fitness category.
• Drive Organizational Excellence: Partner with cross-functional leadership to institutionalize innovation, agility, and a culture of rigorous technical standards.

ESSENTIAL DUTIES AND RESPONSIBILITIES

• We are looking for an elite technical leader who specializes in the design and orchestration of resilient multi-agent systems. You will be the technical cornerstone of the cross-functional team responsible for the AI Coach.
• Architect and Operationalize AI Coach Capabilities: Lead the end-to-end design and deployment of agentic workflows.
• Interdisciplinary Technical Leadership: Collaborate with high-impact teams to ship production-grade code that balances performance with stability.
• Institutionalize Data & Observability: Build the foundational infrastructure for automated evaluation harnesses (Evals) and deep application observability.
• Set the Engineering Standard: Define the architectural roadmap and best practices for the company’s AI-driven ecosystem.
• Optimize Model Performance: Advance foundational LLM capabilities through sophisticated prompt engineering, fine-tuning, and RAG optimization.
• Strategic Horizon Scanning: Ensure iFIT maintains a competitive edge by proactively integrating emerging AI methodologies and frameworks.
• Technical Mentorship: Cultivate a high-performance engineering culture through expert guidance and peer development in modern AI and software paradigms.

EDUCATION & EXPERIENCE

• 8+ years of senior-level engineering and AI experience, with a focus on large-scale systems.
• Deep mastery of Agentic AI frameworks (e.g., LangGraph, Llama-Index) and a history of deploying and maintaining mission-critical agentic applications.
• Distinguished expertise in production-level Python and/or TypeScript development.
• Proven agility in rapid prototyping without compromising long-term system integrity.

Demonstrated experience scaling multi-agent architectures to handle high-concurrency production loads.

DISCLAIMER

Compensation may vary based on the job level, your geographic work location, position incentive plan, and exemption status.
Although we currently may consider hiring in the states listed below, not all positions are available in all locations, and work in a particular state is not guaranteed. Current list of states where iFIT may consider hiring: AK, AL, AR, AZ, CA, CO, CT, FL, GA, ID, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, NC, NH, NJ, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, WA, WI, WY.

Subject to applicable state laws, your employment at iFIT is "at-will". At-will employment means that you and the company each have the right to terminate the employment relationship at any time for any cause or for no cause at all.