Flutter & Node.js Fullstack Engineer (f/m/d) - Fully Remote

memodio is a digital health application (DiGA) fighting forgetfulness and dementia 🧠 Our app is prescribed by doctors, fully reimbursed by German statutory health insurance, and recommended by leading medical associations. In a clinical trial with 140 participants, we showed that it measurably improves memory performance, everyday independence, and quality of life. More than 10,000 people already trust memodio. We've been on the market for over five years. So we have the speed and ownership culture of a startup, without the chaotic early days: a validated product, paying reimbursement partners, and real users who notice when we ship something good. Now we're growing the engineering team. Where you sit: anywhere in the world. We're a small distributed team, not a company with a remote policy bolted on. The one requirement is overlap: at least four hours of your working day between 09:00 and 18:00 Berlin time, because we solve problems together, not by throwing tickets over a wall. How you join us: as an employee or as a freelancer, whichever fits your situation better. Tell us which you'd prefer when you apply. Tasks Our core product is live and helping thousands of people, but it's far from finished. A big part of this role is evolving the existing app to better fit the people who actually use it: adults aged 50+, often dealing with early-stage cognitive decline. Every improvement you make has a direct, visible effect on someone's day. Beyond the core product we're building new and adjacent products, including ones with AI capabilities. If working with LLMs excites you, there's real room to shape that. If it doesn't, that's fine too. How the role works You won't get finished designs and implementation specs to execute. You'll get problems, context, and user needs and the freedom to figure out the best solution. That's deliberate: it's where the creativity and the ownership live. It also means the job asks you to think about what to build, not only how . Today our CTO is hands-on in the codebase, supported by a part-time engineer. You'd join as the next full-time engineer on a small team where your decisions carry real weight. Day to day Frontend: evolve our Flutter app (iOS & Android), with a strong focus on good UX and usability for people aged 50+ Backend: design and build our Node.js APIs and services for new features Product: work closely with our medical and product colleagues: your voice matters in what we build and how Quality: help us keep code review, testing, and engineering standards at the level a regulated medical product demands Optional: if DevOps interests you, there's room to shape our cloud infrastructure, CI/CD, and deployment but it isn't the core of the job Requirements What you bring 3+ years of professional software engineering experience, and we care far more about what you've actually shipped than about the number. Show us something you built Flutter/Dart skills, or a proven ability to ramp up fast (e.g. coming from React Native or native mobile) Working knowledge of Node.js and building APIs, you don't have to be equally strong on both ends, but you can't be mobile-only You work well remotely and asynchronously. This is a distributed role on a tiny team. You write clearly, you post updates without being asked, you unblock yourself, and you don't go quiet for two days At least four hours of daily overlap with 09:00–17:00 Berlin time (CET/CEST) You're comfortable working from underspecified problems. As a small company we can't hand you full designs and implementation plans — you'll need to ask the right questions, propose solutions, and make calls. In return, you get creative freedom A self-directed, structured way of working, you thrive with a lot of ownership and little supervision Dedication: we don't do inhumane startup hours, but when it matters - a release, a deadline, a critical fix Fluent English, written and spoken. German is a plus, not a requirement Nice to have, not required Interest or ex