---
title: 'Lead Software Engineer - Integrations at Nelly Solutions'
canonical: 'https://feeny.ai/job/lead-software-engineer-integrations-nelly-solutions-berlin-43akvd64dh3m'
type: 'job'
last_seen: '2026-10-13'
---

# Lead Software Engineer - Integrations at Nelly Solutions

- **Company:** Nelly Solutions
- **Location:** Berlin, Germany
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-06-17
- **Last confirmed live:** 2026-10-13
- **Apply:** https://jobs.ashbyhq.com/nelly/85242e5e-fd1a-4390-ba11-2735b4440f94/application

**Skills:** Rust, AWS, Data modelling, API modelling, Software engineering best practices, Full development life cycle, Security best practices, Windows Native APIs

> Join the Integrations team to build and maintain Rust-based applications connecting practice management systems with Nelly's backend. This senior role involves designing architecture, implementing full development lifecycle best practices, and leveraging Rust's performance for seamless fintech integrations in a hybr...

## Job description

We're looking for a Lead Software Engineer to help shape the future of our Integrations team in Berlin - the platform that connects Nelly to the practice management systems (PMS) our customers already run, and that lets every other product team at Nelly ship reliable, automated workflows into dental practices without ever touching PMS complexity themselves.

## About the team

Integrations is the connective tissue between Nelly and the outside world. Our stack spans the full spectrum of how a practice can be reached - from talking directly to on-premise systems and their databases, through modern API integrations, up to cloud infrastructure, and increasingly AI-powered capabilities that make integrations smarter and more resilient. That means supporting legacy industry protocols, integrating directly at the database level, and, when there's truly no other way in, driving a PMS's UI the way a human would - all wrapped behind a resilient, observable transaction engine that other product teams (Billing Agent, AI Scribe, Treatment Plan Agent, and more) build on top of without thinking about PMS quirks at all. It's some of the most technically interesting, and most business-critical engineering at Nelly: every transaction that lands (or doesn't) in a practice's system has a direct line to revenue, and our reliability numbers are watched company-wide. We're a small, senior team that owns this end-to-end, from the client software running on a practice's own server to the architecture decisions that shape how the rest of engineering builds on top of us.

## About Nelly

We are building the AI-Driven Financial Operating System for European healthcare, solving the biggest challenges for patients and practices. We create what no bank or software platform can handle. Our all-in-one platform transforms chaotic administrative processes into intelligent, automated workflows, from patient care to billing to next-generation payments. Because we truly believe: healthcare should be less about paperwork and more about people. Why? Because Europe is facing a massive shortage of medical professionals. And if we don't rethink the way practices work, the system won't be able to keep up. With our Series B funding of over €50 million from world-class investors, we are turning our vision into reality. What sets us apart: We work with the best team, which is why we give everything together every day. We believe in Talent Density, because exceptional people make everyone around them better. At Nelly, we move fast and expect everyone to keep up. Stagnation isn’t an option, which is why we invest heavily in growth. AI is an essential part of how we work at Nelly. We expect you to use it every day and give you everything you need to do so. You get trust and ownership and we expect you to speak up, even when it's uncomfortable.

Joining us, you will:

- Be the technical authority the team turns to on the hardest calls - the person other teams seek out for input, not just within Integrations
- Own and evolve the architecture of the Integrations platform - from the on-practice client through the transaction engine - and set the technical direction other engineers build on.
- Build connections between practice management systems and Nelly's backend, working hands-on with modern technologies. We host everything on AWS and manage our infrastructure as code
- Take ideas from concept to production fast, with your work reaching customers within your first few days
- Help define our mid- to long-term technical strategy - the roadmap, patterns and investments that let Integrations keep enabling the product vision as the team and company scale.
- Raise the bar on engineering practices across the team, including how we use AI tooling to make engineering faster and better - you don't just use new tools, you help the team adopt them.
- Explore and ship AI-powered capabilities inside the integration platform itself - not just using AI as an engineering tool, but building it into the product (smarter matching, anomaly detection, automated triage, and more).
- Work closely with other engineering teams and with non-technical, non-product stakeholders - inside and outside the domain (Product, Commercial, Support, Legal, external PMS/partner contacts) - translating technical trade-offs into terms that land on both sides.
- Mentor and coach engineers on the team, and act as a technical thought partner across teams

What you'll bring:

- At least 7 years as a software engineer, with a track record of technical leadership - owning architecture decisions, mentoring others, and driving initiatives across teams
- Strong computer science fundamentals and systems-level thinking
- Proficiency in data and API modelling
- Knowledge of software engineering best practices for the full development life cycle.
- Strong communicator and team player - equally comfortable working with engineers on other teams and with non-engineering stakeholders
- Willingness to pick up new languages and technologies fast - you don't need to already know our stack, but you're confident you can learn it quickly
- Experience using - and introducing - AI tools to make yourself and your team more effective, not just as a user but as someone who champions adoption
- Experience working in a highly cross-functional, multi-stakeholder environment, like Integrations, where you're coordinating across many internal teams and external parties

Nice to have:

- Comfortable working across the full stack - from device- and database-level integration, through APIs, up to cloud infrastructure
- Experience with AWS, security best practices and Windows Native APIs
- Experience deploying and supporting software across many different customer environments and setups (e.g. on-premise installs, varied client infrastructure)
- Proficiency in English; German is a strong plus What we offer:
- Deutschlandticket (public transport pass covering all of Germany) or Swapfiets membership, so you get around the city fast
- Urban Sports Club membership, for sport and balance
- Flexible working hours and a hybrid setup
- Up to 4 weeks of workation
- A dog-friendly office with great vibes and a team that's fun to work with
- Snacks and a fridge full of cold drinks

We welcome applications from people of all genders and backgrounds, regardless of origin or age. If you're convinced you're the right fit for this role - even if your CV doesn't match the requirements 100% - tell us why.

## About Nelly Solutions

## Company Overview
- **One-liner**: Nelly provides an AI-powered platform that automates administrative workflows for medical and dental practices, covering the entire patient journey from intake and documentation to billing and payments.
- **Entity Type**: Private (Series B – €50M round; total funding $172.2M including $100M debt financing)
- **Headquarters**: Berlin, Germany
- **Founded**: 2021
- **Founders**: Lukas Eicher, Niklas Radner, Dr. Tobias Heuer, Rasmus Schults, Laurids Seibel

## Core Business
- **Industry**: Healthcare IT, Fintech (digital practice operations and billing)
- **Target Customers**: B2B – medical and dental practices (small to large), statutory health insurance associations (KV/KZV)
- **Mission**: Reduce administrative burdens and bureaucracy so healthcare professionals can focus on patient care – “make the most vital professions in our healthcare system more appealing again” [getnelly.de/en/about](https://www.getnelly.de/en/about)

## Products & Services
- **Digital Anamnesis**: Patients complete medical history on their own smartphone/tablet at home or in the practice; data transfers automatically into the practice management system.
- **Digital Documents**: Sending, signing, and managing documents via SMS, WhatsApp, or email, including automated reminders.
- **KZV / KV Factoring**: Instant payouts of outstanding statutory insurance claims to improve cash flow and liquidity (up to 80% advance rate).
- **Digital Payment**: Direct payments via debit/credit card, Apple Pay, Google Pay – both on-site with card terminals and through digital payment links, with automated invoice matching.
- **Nelly AI**: Real-time AI-powered documentation during patient treatment (speech-to-text).
- **Practice Rating**: Automated review requests and redirects to Google Reviews, with analytics on patient satisfaction.
- **PVS Connector**: Integration layer that connects with all major practice management systems (e.g., medatixx) without requiring a system change.

## Market Standing
- **Valuation / Market Cap**: Not publicly disclosed
- **Key Metric**: Annual revenue ~$4.3M (estimated); Total funding $172.2M (including €50M Series B led by Lakestar, Cathay Innovation, Notion Capital, b2venture, plus $100M debt facility in Oct 2024)
- **Notable Investors**: Cathay Innovation, Notion Capital, Lakestar, b2venture, Motive Ventures, Global Founders Capital
- **Growth Signals**: 1,000+ practices trusting Nelly; 134 employees (+37.4% YoY); operating in 6 countries (Germany, UK, Spain, Switzerland, South Africa, Italy); joined medatixx HealthHub in June 2026 [linkedin.com](https://de.linkedin.com/company/nelly-solutions)

## Competitive Advantages
- **Full-stack patient journey**: One platform covering intake, documentation, billing, factoring, and payments – no need to stitch together multiple vendors.
- **Deep integrations**: Works on top of existing practice management systems (any major PVS), reducing switching costs.
- **Data security & compliance**: AES-256 encryption, TLS in transit, GDPR-compliant hosting in certified AWS Frankfurt data centers, TÜV-certified data protection [getnelly.de/en](https://www.getnelly.de/en).
- **AI‑powered documentation**: Real-time speech-to-text documentation differentiates from legacy digital forms only.

## Strategic Focus
- **Deepening platform ecosystem**: Closer integration with practice management software (e.g., medatixx HealthHub) to become the default financial OS for practices.
- **Scaling factoring & payments**: Expanding digital factoring (KV/KZV) and instant payout capabilities to improve practice liquidity.
- **AI & automation leadership**: Investing in AI engineers and staff AI engineers (open roles) to further automate documentation, billing, and patient communication.
- **International expansion**: Already in 6 countries, likely to expand into more European markets.

## Why Work Here
- **Culture & Values**: “We only work with nice people” – emphasis on collaboration, kindness, ownership, and learning fast. Monthly team events, startup culture with visible impact [getnelly.de/en/jobs](https://www.getnelly.de/en/jobs).
- **Work Model**: Hybrid – choose between home, office, or wherever productive. Up to 4 weeks/year “workation” from other European countries.
- **Perks**: Urban Sports Club membership, Germany Ticket (nationwide public transport) or Swapfiets bike, regular team celebrations.
- **Engineering Culture**: Strong AI focus (Staff AI Engineer, Engineering Manager AI, Senior AI Engineer roles). Technical team makes up 18% of staff. Modern stack, real ownership, and growth from day one.
- **Team & Growth**: 134 people, growing 37% YoY. Open positions: 14 across engineering, sales, marketing, product, and customer success.

## Sources
1. [getnelly.de](https://www.getnelly.de/en) – Product overview, security, features, integrations
2. [getnelly.de/en/about](https://www.getnelly.de/en/about) – Founders, mission, team
3. [getnelly.de/en/jobs](https://www.getnelly.de/en/jobs) – Culture, values, benefits, open positions
4. [linkedin.com/company/nelly-solutions](https://de.linkedin.com/company/nelly-solutions) – Headcount, revenue, funding, employee distribution, investors
5. [getnelly.de/en/imprint](https://www.getnelly.de/en/imprint) – Legal entity, registration

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