Senior Product Engineer

I’m helping Kickoff find a top candidate to join their team full-time for the role of Senior Product Engineer - (Hybrid in NYC — Relocation Supported).

You'll transform fitness and health by building AI-powered products that personalize guidance and improve lives.

Compensation:

USD 200K - 230K/year

+ Bonuses (up to 0.5% of base compensation)

Location:

Remote: United States

Mission of Kickoff:

"Empower fitness and nutrition coaches to build thriving businesses while helping millions of people live healthier lives."

What makes you a strong candidate:

• You are an expert in Product management, Product engineering.
• You are proficient in User research, Full-stack development.
• English - Conversational

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Responsibilities and more:

The Role:

• We are looking for an AI-native Senior Product Engineer who combines product taste, user empathy, strong technical judgment, and hands-on engineering ability.
• This is a combination of an engineering role and a Product Manager role, enabled by AI.
• You should be able to talk to users, identify high-leverage problems, design thoughtful solutions, write requirements, build prototypes, ship production features, and use AI tools to move dramatically faster.
• You should be comfortable reading and writing code, especially in React and Node.
• Your real superpower is shipping insanely fast using AI for research, design, implementation, testing, debugging, QA, and iteration.
• You will own major parts of the Kickoff product experience and help define how AI transforms fitness, wellness, and preventative health.

What You Will Do:

• Use AI and agentic harnesses in every part of your work, allowing you to ship faster and expanding the product surface where you can make an impact.
• Own product areas end-to-end: discovery, user research, prioritization, specs, design direction, implementation, QA, launch, and measurement.
• Build delightful consumer and coach-facing product experiences across web and mobile surfaces.
• Work directly with coaches and clients to understand pain points, workflows, and opportunities.

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• Develop AI-powered features that help coaches deliver better, more personalized guidance.
• Improve our ability to personalize workouts, nutrition recommendations, habits, sleep interventions, and behavior-change support.
• Build systems that identify meaningful patterns in client data, including workouts, meal logs, messages, habits, and wearable data.
• Define clear success metrics, test plans, and evaluation frameworks for AI-powered product features.
• Contribute to a high-agency, in-person NYC team obsessed with helping people get healthier.

Example Problems You Might Work On:

• How can we help a coach instantly understand what happened with a client in the last day and what to do next?
• How can we generate workout recommendations that adapt over time based on adherence, injuries, preferences, goals, and progress?
• How can AI help coaches give better meal-log feedback that actually changes behavior?
• How can we detect early signs that a client is losing motivation and help the coach intervene?
• How can wearable data inform better guidance around sleep, recovery, workouts, and mood?

What We Are Looking For:

• You are an AI-native builder, building incredible products that users love at high speed using AI and agentic tools every day.

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• You also have strong full-stack engineering skills, especially with React and Node.
• You have experience improving LLM outputs over time with evals and fine tuning.
• You can move from user interview to prototype to production-quality implementation quickly.
• You are excited by fitness, wellness, nutrition, behavior change, preventive health, and healthcare.
• You are motivated by helping people improve their lives in measurable ways.
• You are high-agency, low-ego, and comfortable operating in a fast-moving startup.
• You are excited to work in person with a tight-knit team in NYC.

Bonus Points:

• You have built health, wellness, fitness, or other relevant consumer products with excellent UX.
• You have strong design instincts or experience using AI tools for wireframes, prototypes, and visual exploration.
• You are active in the NYC tech/startup community.
• You have been a founder or early startup employee.
• Note: although this posting is open to applicants across the US, this is a hybrid role based in New York, NY (524 Broadway)—not fully remote. We support relocation costs for candidates moving from outside the area.

Your potential leader:

• Jack Gardner—Founder & CEO at Kickoff—we're hiring!