Senior Fullstack Engineer (w/m/d)

At Flinn, we’re redefining how medical device manufacturers create safer and better products 10x more efficiently. To shape the development of our existing and new products and to extend and scale our technical platform, we are looking for a product-minded Fullstack Engineer with a strong AI focus. You will be building AI native products that increase the safety of medical devices and will be playing a key role in growing our tech team further.

Responsibilities

Own a piece of our product end-to-end - either building a new module 0→1 with real autonomy over technical design, and strengthening an existing team already shipping in production; Work hands-on across the full stack: frontend (React), backend (Node.js), and the relational/non-relational databases underneath; Partner directly with product - understand why a feature matters to a customer, not just what to build; help turn customer feedback into roadmap decisions; Use AI tooling as part of your day-to-day build process, and in some cases help us ship AI-powered features into the product itself; Help shape our architecture, engineering standards, and hiring as we grow the team; Actively involved in decision making (product & tech) and take ownership and initiative

Requirements

Proven track record designing, building, and maintaining complex, production web applications as a senior engineer; Hands-on experience building with AI tooling, or building AI-powered product features; Solid backend experience (preferably Node.js) and frontend experience (preferably React); Solid understanding of both relational and non-relational databases; Experience working closely with product in a cross-functional, product-led environment; Comfortable operating with ambiguity and building infrastructure and processes as you go; Positive, problem-solving mindset and a clear bias for action; You speak up; Passion for sharing knowledge and mentoring less experienced engineers; Good communicator with both technical and non-technical people; Pragmatic and adaptable; You care about the product and the problem it solves

Nice to have

Experience in a founding engineer or 0→1 building context; Background as an engineering manager who's chosen to move back into hands-on building - a profile that's worked well for us before

Benefits

Join a fast-growing, well-funded European startup backed by experienced founders and investors; Be part of a mission-driven health-tech company whose work directly improves people’s lives; Take end-to-end ownership of core operational processes that keep the company running; Play a key role in scaling Flinn, shaping how operations work as we grow; Work in a high-trust, low-ego environment with autonomy and clear ownership; Enjoy flexible working hours, remote flexibility, and regular team time in Vienna; Work in a net-zero company where all unavoidable CO₂ emissions are compensated with carefully selected, high-quality removal certificates; Receive one of the most employee-friendly equity packages, including fair vesting terms and profit-sharing opportunities; Grow in a professional, high-standard environment that supports long-term personal and career development