Senior Fullstack Engineer, TypeScript

We’re on the lookout for an ambitious Senior Fullstack Engineer to join our Engineering team at our office in Berlin. Join us in building the largest AI enabled fintech for healthcare! ABOUT NELLY We are a Tech Company and we believe healthcare should feel a lot less like paperwork, and a lot more like people. So we’re building the technology that lets medical practices run smoothly, simply, and without all the admin chaos that slows everyone down. Our platform turns messy processes into smart, automated workflows, from patient journeys to billing to next-generation payments. Powered by AI, built for real humans, and designed to give medical teams the time and headspace they desperately need. Why? Because Europe is facing a massive shortage of medical assistants. And if we don’t rethink how practices operate, the system won’t be able to keep up. We’re backed by €50M in Series B funding from world-class investors and are scaling fast to build Europe’s leading healthcare fintech. Our vision: empower over a million medical practices and make life better for millions of patients. But here's the part we’re proudest of: we only work with nice people. No egos, no drama. Just kind, curious, hardworking humans building something meaningful together. If that sounds like your kind of place, welcome to Nelly. JOINING US, YOU WILL - Build patient and doctor experiences, financial systems, and AI-powered products used across our platform. - Work with modern technologies such as TypeScript, React, Next.js, Node.js and more. We host everything on AWS and manage our infrastructure as code. - Collaborate closely with product, design, and data to ship impactful, user-centric features. - See your ideas go from concept to implementation, impacting customers within your first few days. - Make a significant contribution to defining, maintaining and improving our architecture and best practices. - Join a driven, highly skilled, engineering team and collaborate with talented professionals — learning from their expertise and contributing your own. WHAT YOU'LL BRING - 5+ years of experience in software engineering - Proficiency in TypeScript / React / Node.js - Experience in data and API modelling, and cloud platforms like AWS - Knowledge of software engineering best practices for the full development life cycle - A pragmatic mindset and strong sense of ownership - Team player with excellent communication skills WHAT WE OFFER - BVG ticket or a Swapfiets membership to cruise through the city - Urban Sports membership to sweat, stretch, or sauna your way through the week - Top of the line working equipment - Flexible hours and a hybrid setup in the heart of Berlin - Enjoy up to 4 weeks of workation wherever inspiration hits - A cozy, dog-friendly office where good vibes are basically mandatory - A fridge full of cold drinks and snacks waiting to be claimed We celebrate diversity and welcome individuals of all genders (m/f/d) to apply — and because we know confidence gaps and impostor syndrome can get in the way, please don’t hesitate even if you don’t meet every single criterion; if you’re exceptional, tell us why, and we’d genuinely love to hear from you.