Principal Software Engineer

leonardo is a B2B SaaS solution that helps organisations measure sustainability impact. We combine scientific standards and engineering excellence to drastically simplify the complex task of impact measurement. leonardo's suite of software tools enable organisations to measure, analyse, verify and report on impact, while remaining compliant to regulatory standards. We partner with organisations and businesses of any size from project developers on the ground, to capital providers and impact funds. Our goal is to tackle the world's most pressing problems by making meaningful impact data accessible. 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 Requirements 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 Benefits Flexible working hours and a hybrid working model 30 days paid leave per year Personal and professional development opportunities Opportunity to build and influence the product and dev team An international team Company laptop Bike leasing Gym pass Join our team at leonardo and make a meaningful impact in tackling the world's pressing problems. Apply now for the Principal Software Engineer position!