Fullstack Developer (US)

Ketryx is an AI software platform that enables healthcare life sciences companies to ship life-saving regulated products in weeks instead of years. Our AI software removes compliance friction, dissolving the historical tradeoff between innovation and compliance, and enables regulated industries to innovate at the pace of modern software. Since launch, Ketryx already touches the lives of 100M patients and powers all of the world's top five medical device manufacturers. Backed by Lightspeed Ventures, our founders are the former Head of AI at Amgen and CTO of Wolfram Cloud. Healthcare and life sciences is just the beginning—automotive, aerospace, energy—if it's regulated, it's because society decided it matters.

About the role

Join a small, highly motivated engineering team where you will shape the future of software at Ketryx. In this role, you will take ownership of critical technology decisions and roadmaps, tackle complex problems, and drive innovation. You will work in an agile environment, balancing ideation and detailed improvements while contributing to Ketryx's mission of reinventing how medical device manufacturers bring life-saving innovations to market. This position is based in our Boston, Massachusetts office with a hybrid schedule (Monday, Tuesday, Thursday, Friday in office; Wednesday remote).

Responsibilities

• Engage in customer interactions, collect feedback, and build/design new prototypes to shape, plan, and develop product features alongside designers, product managers, and other stakeholders.
• Build features end-to-end, including backend and database work, with a strong focus on user interface and user experience.
• Collaborate closely with Pre-Sales, Sales, Post-Sales, and Marketing teams in the Boston office to shape and build product improvements across the entire product.
• Build accessible user interfaces using React (NextJS), Tailwind, JollyUI (shadcn), and React Aria.
• Establish and maintain good UI development practices, including shaping a well-documented component library with the design team.
• Refactor and improve existing user interfaces by extracting and re-using common components.
• Support and mentor other team members to help them build better UI.
• Provide technical support to customers in collaboration with the Client Operations team.

Requirements

• 3+ years of full-time industry experience building frontend web applications in a production environment.
• Very good understanding of TypeScript (2+ years) with React (3+ years).
• Good understanding of using React Aria or an equivalent library for building accessible React components.
• Experience building a design system and/or using an existing component library.
• Experience using Tailwind with React.
• Ability to work in a fast-moving startup environment, taking ownership of product features and driving them forward.

Preferred Skills

• Good understanding of GraphQL and fragments.
• Prior experience with logging tools such as AWS CloudWatch and Sentry.
• Prior experience building AI-related UI, particularly for large language models (e.g., chat interfaces, built-in AI interactions).
• Additional full-stack experience, e.g., working in a NextJS/Express backend or with a SQL database.

Benefits

• Competitive compensation ($130,000 - $150,000 base salary + bonus + equity, dependent on experience).
• Generous stock options.
• Work in an exciting field with a positive impact on the world.
• Opportunity to learn and grow as part of a global team.
• Generous PTO for full-time employees.

Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of employment visas (including H-1B), F-1 visas, or Optional Practical Training (OPT) status at this time.