Senior Fullstack Engineer, TypeScript

We celebrate diversity and encourage individuals of all genders (m/f/d) to apply.

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!

You’ll join the Financial Experience team, working at the intersection of healthcare fintech and user experience. You'll focus on invoice lifecycle management and patient-practice interactions, building features that directly impact how medical practices manage billing and how patients engage with their healthcare payments. As we expand into the Spanish market, you'll help adapt our platform for new regions while maintaining the quality experience our users trust.

About Nelly

At Nelly, we’re revolutionizing medical practice management with AI-driven automation and seamless digital workflows. Our innovative solutions - from best-in-class patient journeys, AI enabled patient relationship management and billing to state of the art payment solutions - eliminate painful workflows and improve financial outcomes making healthcare administration smarter, faster, and 100% digital.

To fuel our mission, we just raised €50M in our Series B, backed by top-tier investors like Cathay, Notion, Lakestar, GFC, b2venture, and Motive Partners. With this momentum, we’re on a mission to build Europe’s largest fintech in healthcare - bringing best-in-class financial and operational solutions to over 1 million medical practices serving millions of patients daily.

Join us now if you’re driven by impact, excited by fast-paced innovation, and ready to shape the future of healthcare!

Joining us, you will

• Develop intuitive interfaces for invoice management and payment flows across our Doctor Portal and Patient Portal applications.

• Implement localization, region-specific payment methods, and compliance requirements as we expand into Spain and other markets.

• Collaborate closely with product, design, and data to ship impactful, user-centric features.

• Maintain high quality standards while continuously iterating and improving the product.

• Help define and maintain system architecture and development best practices.

What you'll bring

• 3+ 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

• Bonus Points For experience in financial systems and payment flows

What we offer

• Competitive salary

• Top of the line working equipment

• Generous budget for learning and development activities

• Flexible working hours and hybrid work mode in Berlin

• 4 weeks workation possibility

• Cozy and dog friendly office in the city centre

• BVG Ticket or Swapfiets subscription

• Urban Sports membership

We are looking forward to receiving your application and welcoming you to the team.