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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer - **Company:** leonardo - **Location:** Frankfurt am Main, Germany - **Experience:** Starter - **Salary:** €70,000.0 - €80,000.0 - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Computer Vision, Code Review, DevOps, Machine Learning, Node.Js, Next.js, Software Engineering, TypeScript, Web Applications, Test-Driven Development (TDD), ReactJS, Large Language Models, Machine Learning Operations, Microservices - **Published:** August 27, 2026 - **Apply:** https://www.xing.com/jobs/frankfurt-main-lead-software-engineer-146641990 ## About the Role * Minimum 9 years of experience in software development * Experience in leading, hiring, and mentoring a development team * Advanced knowledge in: Next.js, React.js, Node.js, TypeScript, Test Driven Development, DevOps, MLOps, AWS Services * Familiarity with MLOps, particularly experience with pipelines that require large language models or computer vision * Fluent in spoken and written English * Experience with both monolith and microservices architectures * Comfortable communicating ideas or deliverables to the team and clients * Bonus: Experience with pipelines that require large language models or computer vision ## Description We're looking for a Lead Software Engineer to be the head of the spear that is our development team. This is a full-time hybrid position (not remote) located in Frankfurt am Main, with the flexibility of working from home up to 10 days a month. You're a startup person through and through - you enjoy faced paced work, tight deadlines, figuring things out, quick turnarounds, and small and talented teams. You will be responsible for architecting, developing, optimising and maintaining the leonardo software to continue to effectively deliver critical impact data. You will collaborate closely with other developers, architects, designers, data scientists, sustainability experts and product managers to ensure the software and systems meet current and future business needs. You're a will be coding 80% of the time and will undergo a rigorous live coding test as part of your interview process - we are not looking for an Engineering Manager. Tasks * Lead a growing development team, incl. coaching other developers to upgrade the overall skill level of the team * Make key technical & architectural decisions to ensure a high standard of security, efficiency and scalability * Hands-on development of the leonardo web application * Perform FE and BE code reviews and ensure best practices and high code quality is maintained * Research & recommend new technologies that will meet business requirements * Optimise code and algorithms to boost performance * Setup and optimise DevOps processes * Attend meetings with stakeholders and clients to provide technical feedback * Deployment of ML models * Collaborate with the Product, Design and ML teams to provide estimates and inputs on the difficulty & limitations of features ## Related Videos - [Inside Mercedes-Benz: How CIO Katrin Lehmann is Empowering 5,000 Developers and Driving Digital Change](https://www.wearedevelopers.com/videos/1360-inside-mercedes-benz-how-cio-katrin-lehmann-is-empowering-5-000-developers-and-driving-digital-change) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Stop using Node.js like in 2020! 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