Staff Engineer - Full Stack (f/m/d)

We're looking for

At thermondo, our mission is to decarbonize every home, and technology is our primary lever for change.

We are disrupting a massive industry bogged down by legacy systems and manual work. This is where you come in. We build the intelligent software and automation that gives us a decisive edge, allowing us to operate at a scale and efficiency our competitors can't match.

We are looking for a Staff Engineer - Full Stack (f/m/d) to serve as a strategic technical leader. In this role, you will not just solve the problems we hand you; you will identify the problems we should be solving. You will report to a Domain Lead and act as a technically-focused peer, helping to define the vision for our platform and the AI strategies that will differentiate us in the market.

If you enjoy this

Drive cross-team technical strategy. You will architect the high-level systems that connect our customer apps, internal tools, and data backbone, ensuring we build for long-term scalability and resilience.

Operate with high-level autonomy. You will translate vague business objectives into concrete technical roadmaps, proactively identifying opportunities for impact without needing a Product Manager to define every step.

Lead our AI Engineering evolution. You will co-design the patterns for integrating LLMs into our code - handling reliability, cost, and evaluation - while demonstrating to the wider organization how to build AI-native software.

Act as a force multiplier. You will elevate the entire department by removing developer bottlenecks, mentoring engineers, and championing AI-augmented workflows.

Bridge the gap between Business and Tech. You will partner with leadership to navigate ambiguity, translating complex architectural trade-offs into business value and leading large-scale initiatives to delivery.

And recognise yourself here

Experienced: You have significant experience (10+ years) in software engineering, including operating at a Lead or Staff level in a modern product company.

Full Stack: You have deep, T-shaped expertise. You are great in Python and Node.js/TypeScript. You understand backend and frontend. You can reason about data flows and architecture, and you can build them too.

"Manager of One": You are self-directed. If dropped into ambiguity, you create clarity. You can effectively manage your time between coding, designing, and communicating without needing constant oversight.

Pragmatic: You avoid over-engineering. You understand that "boring technology" is often best, but you know exactly when to spend innovation tokens (specifically on AI and Cloud scalability).

Great Communicator: You write clear, persuasive technical documents (RFCs, ADRs). You can lead a room of engineers to a consensus even when opinions differ. You can articulate the business implications of technology in a room full of VPs.

Bonus points

Production AI: Experience deploying LLMs in production (managing context windows, prompt engineering, vector databases, and evaluation frameworks).

Event-Driven Systems: Deep experience with asynchronous architectural patterns and specific systems like RabbitMQ, Google Pub/Sub and Kafka.

Legacy Migration: Experience strangling a monolith or migrating legacy systems to modern cloud-native architectures without downtime.

Familiarity with Sales: Experience writing software that enables Sales teams (ex: CRM, scheduling).

A passion for climate tech. You're motivated by our mission to decarbonize homes and are excited to apply your skills to a problem that matters.

What we have to offer

Join a team of Product Managers, Software Engineers, Designers, Data and Salesforce people who are excellent in their craft and are happy to share their knowledge and help you grow alongside them

Our team is using the latest frameworks and is working with a modern tech stack to build powerful products for our customers, craftspeople, and internal teams

Boost your skills with a dedicated annual learning budget to spend on conferences, courses or books

Choose your own AI coding companion – we provide you with the license for the AI model or assistant of your choice

We offer a challenge with purpose - the better our tech, the more people will live climate-neutral and the better the world becomes for future generations

We offer a fantastic culture in the tech team and beyond

Modern office in the heart of Berlin

Work from home - up to 3 days a week

You receive an Urban Sports Club membership & nilo.health membership

You can lease a job bike or bring your dog one day/week

Corporate Benefits at more than 100 partners

20% employer contribution to your pension and disability insurance