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# Lead Software Engineer

- **Company:** Nelly Solutions GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Cloud Computing, Databases, Software Construction, Software Engineering, Systems Integration, Backend
- **Published:** September 10, 2026
- **Apply:** https://startup.jobs/lead-software-engineer-integrations-nelly-8368806

## About the Role

* 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

## Description

* 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