Lead Backend Platform Engineer
Job Description
About January AI
At January AI, we believe every day is January 1st — a fresh start for better health.
Founded in 2017 and headquartered in Menlo Park, California, January AI is the first AI-powered precision health company focused on improving metabolic health and advancing personalized nutrition. Co-founded by tech executive Noosheen Hashemi and Stanford geneticist Dr. Michael Snyder, we bring together machine learning, multi-omic science, and real-world health data to empower individuals to take control of their health.
Our flagship January app uses data from continuous glucose monitors, wearables, and food logs to predict users’ blood sugar responses to more than 54 million foods, delivering real-time, personalized recommendations for nutrition, activity, and lifestyle.
In 2025, we introduced Mirror, which integrates genomics, wearable data, and at-home diagnostics to offer clinical-grade guidance—supporting both individuals and enterprise health partners with tailored insights and actions.
Recognized as one of Fast Company’s Most Innovative Companies (2025, Wellness), a CES Innovation Honoree (2025), and one of Inc.’s Best in Business (2024), January AI is backed by visionary investors including Marc Benioff, Jerry Yang, and Steve Chen. Our work has been featured in The Wall Street Journal, The New York Times, STAT, Financial Times, and TechCrunch.
About January AI
At January AI, we believe every day is January 1st — a fresh start for better health.
Founded in 2017 and headquartered in Menlo Park, California, January AI is the first AI-powered precision health company focused on improving metabolic health and advancing personalized nutrition. Co-founded by tech executive Noosheen Hashemi and Stanford geneticist Dr. Michael Snyder, we bring together machine learning, multi-omic science, and real-world health data to empower individuals to take control of their health.
Our flagship January app uses data from continuous glucose monitors, wearables, and food logs to predict users’ blood sugar responses to more than 54 million foods, delivering real-time, personalized recommendations for nutrition, activity, and lifestyle.
In 2025, we introduced Mirror, which integrates genomics, wearable data, and at-home diagnostics to offer clinical-grade guidance—supporting both individuals and enterprise health partners with tailored insights and actions.
Recognized as one of Fast Company’s Most Innovative Companies (2025, Wellness), a CES Innovation Honoree (2025), and one of Inc.’s Best in Business (2024), January AI is backed by visionary investors including Marc Benioff, Jerry Yang, and Steve Chen. Our work has been featured in The Wall Street Journal, The New York Times, STAT, Financial Times, and TechCrunch.
Why Join January AI
- Real ownership across the stack: You'll own the systems that connect a person's clinical and lifestyle data to AI-generated insights — used by both our consumer app and the enterprise partners we serve.
- A team that can back the work: You'll work alongside Stanford-trained scientists, AI researchers, and operators who've shipped at scale, reporting to the CTO with the AI Lead as a close partner.
- Research-credentialed product: Our clinical reasoning model has published benchmarks that hold up against the largest general-purpose LLMs. We treat scientific credibility as a product requirement, not marketing.