Technical Co-Founder / CTO

Kysana AG | Swiss Digital Health Startup | Remote / Switzerland

Initially part-time · Equity-based · No initial salary

Build the technology that connects metabolic care with everyday life.

Kysana is a Swiss digital health startup building software to support professionally guided ketogenic and metabolic care across mental health, neurology, and metabolic conditions.

Our platform connects healthcare professionals and patients through a mobile app and a professional dashboard, bringing together personalised nutrition planning, AI-assisted food analysis, and health tracking.

We are not starting from scratch.

We have a functioning platform, an existing technical foundation, and early clinical collaboration work to build on. We are now looking for a Technical Co-Founder / CTO who can take ownership of the technology and help shape Kysana’s next stage.

This is an opportunity for an experienced builder who wants to combine hands-on engineering with genuine influence over product direction and technical strategy.

Your role

You will lead the technical development of Kysana while remaining actively involved in building and shipping the product.

Your responsibilities will include:

- Own the architecture and codebase: assess the existing platform, prioritise technical improvements, and make pragmatic build-versus-buy decisions.

- Develop across web and mobile: evolve our professional dashboard, backend, APIs, and Flutter app for iOS and Android.

- Build useful product features: improve personalised nutrition planning, meal planning, food analysis, and patient–professional workflows.

- Integrate AI responsibly: evaluate and implement AI-powered features with attention to accuracy, privacy, and appropriate human oversight.

- Strengthen engineering foundations: improve testing, deployment, monitoring, documentation, security, and reliability.

- Shape the technology roadmap: work directly with the founding team to translate clinical and user needs into focused, achievable product priorities.

Your initial focus will be to understand the existing system, identify the highest-impact improvements, and establish a realistic roadmap for the next development phase.

Our tech stack

- Web & backend: Next.js, React, TypeScript

- Mobile: Flutter — iOS and Android

- Database: PostgreSQL

- AI: Integration of AI-powered services and features

Who you are

You are a senior, hands-on engineer who enjoys taking responsibility beyond individual development tasks.

You bring:

- Strong full-stack experience with TypeScript, React/Next.js, backend development, and APIs.

- Practical experience building and maintaining Flutter applications.

- Solid PostgreSQL and database-design skills.

- Experience taking over an existing codebase and improving it without unnecessary rewrites.

- Sound judgement around architecture, security, delivery speed, and technical debt.

- An entrepreneurial mindset: you work independently, communicate clearly, and turn uncertainty into practical next steps.

Experience with AI-enabled products, healthcare software, or sensitive personal data is particularly valuable. An interest in nutrition, metabolic health, or mental healthcare will help you connect with our mission.

This role is for someone who wants to build—not only advise or manage.

What we offer

- 5% equity in Kysana AG, subject to an agreed vesting arrangement.

- A Technical Co-Founder / CTO role with substantial technical autonomy and direct involvement in product and company-building decisions.

- An existing product and technical foundation to develop further.

- Close collaboration with the founding team and healthcare professionals.

- Flexible, remote-friendly working arrangements, with an initial part-time commitment.

- The possibility of transitioning into a paid role once funding is secured, subject to available resources and agreed terms.

There is no initial salary. This is an early-stage, equity-based opportunity with the risks and responsibilities that entails. We want to be transparent from the outset and find someone whose expectations, availability, and long-term ambition align with ours.

Interested?

Send us a short introduction, your LinkedIn profile and/or GitHub, and one or two examples of products you have built or technically led.

Tell us what interests you about Kysana and what level of part-time commitment you could realistically offer.

Help us build thoughtful, reliable technology for professionals and the people they care for.