Build the operating system for human health

About the role

You will be a primary owner of the mobile client experience: architecture decisions, performance, offline-first reliability, and shipping quality on iOS and Android. You work directly with design and intelligence teams so features land as coherent product, not disconnected screens.

What you will do

• Design and implement core Flutter features for nutrition, training, focus, sleep, and goals tracking.
• Own offline-first data paths: local encrypted storage, conflict-aware sync, and resilient network boundaries.
• Raise the bar on performance, accessibility, and polish — scroll, animation, cold start, and battery.
• Partner with Product Design on interaction quality and with AI/engineering on safe agent actions in-app.
• Write clear technical notes, review PRs with high standards, and help shape mobile engineering culture.
• Instrument thoughtfully so we learn from real usage without turning health data into surveillance.

What you bring

• 5+ years building production mobile apps; strong Flutter/Dart experience preferred (native iOS/Android with willingness to go deep on Flutter is acceptable for exceptional candidates).
• Proven offline-first or complex local state work (SQLite or equivalent), not only CRUD CRUD against a single API.
• High bar for UI craft and edge cases: empty states, permissions, background tasks, store releases.
• Comfortable owning features end-to-end with minimal hand-holding.
• Excellent written communication in English.

Nice to have

• HealthKit / Health Connect or wearable integrations.
• Experience with encrypted storage, secure enclaves, or privacy-sensitive apps.
• Prior work on habit, fitness, or consumer health products.
• Interest in AI-assisted product flows and safety UX.

About the role

Ohga uses specialized agents and model routing behind a PolicyEngine-style safety layer. You will design how agents propose actions, how we validate them, and how we measure quality over time — with privacy and user confirmation as non-negotiables for material actions.

What you will do

• Design and implement LLM agent workflows for coaching, logging assistance, planning, and summarization.
• Build tool-calling, retrieval, and context assembly that stay minimal and auditable.
• Create eval sets, regression gates, and monitoring for quality, safety, and latency.
• Collaborate with Wellness Science on constraints, disclaimers, and domain correctness.
• Partner with Mobile to ship agent actions that require explicit user confirmation when they change data.
• Document system behavior so product and support can explain what the AI can and cannot do.

What you bring

• Hands-on production experience shipping LLM features (not only notebooks or demos).
• Strong software engineering fundamentals: APIs, reliability, testing, observability.
• Experience with prompt/program design, tool use, structured outputs, and failure modes.
• Judgment about safety, hallucination, and over-automation — especially in health-adjacent domains.
• Clear written communication; ability to work async with a small senior team.

Nice to have

• Multi-agent architectures, planners, or policy engines.
• On-device / edge inference experience.
• Background in ML evaluation, RLHF, or red-teaming.
• Familiarity with nutrition, exercise, or sleep science literature at a working level.

About the role

You will own product design for core Ohga flows: logging, coaching, progress, and social accountability that never compromises privacy defaults. We want restraint, clarity, and motion that means something — not decorative noise.

What you will do

• Lead end-to-end design for major product areas: structure, flows, UI systems, and polish.
• Design for dense data without anxiety: trends, goals, agent proposals, and confirmations.
• Build and maintain a coherent mobile design system with engineering.
• Prototype interactions and motion that communicate state and trust.
• Run lightweight research and critique; turn insight into shippable decisions.
• Partner closely with founders and eng — write and speak clearly about tradeoffs.

What you bring

• Portfolio showing shipped mobile product work (consumer or prosumer), not only concept decks.
• Strong systems thinking: components, patterns, edge cases, empty and error states.
• Excellent visual craft and typography; restraint over trend-chasing.
• Experience designing complex information or multi-step journeys.
• Comfortable collaborating in Figma (or equivalent) and async critique.

Nice to have

• Health, fitness, fintech, or other high-trust domain experience.
• Motion design and prototyping skills.
• Front-end literacy (enough to discuss implementation constraints).
• Brand systems work that still serves product.

About the role

You sit between research and product. Your job is not content marketing — it is to keep Ohga scientifically coherent: what we recommend, when we refuse, and how we phrase uncertainty. You will work with AI and mobile so intelligence stays grounded.

What you will do

• Translate peer-reviewed and clinical literature into product-ready protocols and decision rules.
• Define safety boundaries and escalation language for AI coaching and plans.
• Partner with engineering on OEIS-style energy models, recovery logic, and cross-domain interactions.
• Review AI outputs and feature specs for domain accuracy and overclaim risk.
• Help write user-facing explanations that are precise without being clinical theater.
• Maintain an evidence map the team can trust when prioritizing roadmap bets.

What you bring

• Advanced training in exercise science, nutrition science, physiology, behavioral science, or related field (MSc/PhD or equivalent applied depth).
• Ability to read primary literature and separate signal from wellness hype.
• Experience applying science in product, clinical, coaching, or research-ops settings.
• Clear, careful writing for both technical and consumer audiences.
• Comfort working with engineers and designers on constraints, not only recommendations.

Nice to have

• Prior digital health or wearables experience.
• Knowledge of HRV, sleep staging, energy expenditure models, or sports nutrition.
• Experience with safety review boards or medical/legal review processes.
• Public writing or teaching that shows judgment under uncertainty.

About the role

We hire for craft and ownership. If you build infrastructure, growth systems, brand, data platforms, or something we have not named yet — write to us with a sharp proposal for what you would own in the first six months.

What you will do

• Tell us the problem space you want to own at Ohga.
• Show proof of work that maps to that ownership.
• Explain how you operate: communication, pace, standards, collaboration.
• Be honest about location, availability, and constraints.

What you bring

• Demonstrated excellence in a craft relevant to a multi-platform product company.
• Bias to clarity and shipping.
• Ability to thrive in a small senior team without heavy process scaffolding.

Nice to have

• Direct experience in consumer health, AI products, or developer tools.
• Founder or early-stage experience.