Infrastructure / DX Engineer – Platform (all genders)

About Babbel Labs Babbel Labs is building the future of language learning. We are an AI-first, independent company within the Babbel group, based in Berlin. Our teams bring AI, research and product together to ship experiences that set a new standard for how people learn. The role We are modernising and consolidating our services in the cloud, and we are building the internal platform that lets product teams ship and run those services with confidence. This role builds that platform. It also stays close to the code, in the same cloud-native, TypeScript and Node stack the product teams use. The thing this role is measured on is whether product engineers can do their own work without waiting on us. That means building or picking the tooling that gives them a paved road, and knowing the market well enough to adopt what already exists rather than building everything from scratch. An engineer who has only consumed someone else's platform has not done this job. This is a hands-on individual-contributor role on the Platform team. You will design, build and ship, and you will work directly with product engineers to help them solve their infrastructure problems. How you'll make an impact Build and operate the internal developer platform, the paved road of tooling and infrastructure that lets teams set up and run their own services without waiting on us. Drive our cloud migration, moving and consolidating services into a modern cloud-native setup without slowing delivery. Design system and infrastructure architecture and communicate it clearly, including diagrams that other engineers can build from. Work alongside product engineers and get them unblocked, because the platform exists to serve the product. Deliver with coding agents as a matter of course, and help improve how the whole team does so. Your skills and qualifications A track record of building or choosing internal developer tooling that lets other engineers work faster, with a clear before and after, and the judgement to adopt an existing solution when one fits rather than build from scratch. This is the requirement the role turns on. TypeScript on Node.js as your working language here. Your main language so far can be another one, such as Python, Go or Rust, as long as you build applications in it and are ready to work in TypeScript daily. Coding agents are part of how you work every day , and you have a real habit of verifying what they produce before you rely on it. This is not a preference of ours — an engineer who has not genuinely adopted them cannot work the way this team works. Deep, hands-on serverless AWS experience. Lambda, API Gateway, DynamoDB and event streaming are our daily tools, and we want someone who has designed against them rather than only deployed onto them. Judgement about when not to reach for the default. You pick by tradeoff and can say where serverless stops being the right answer. Dogmatism in either direction is what we screen out. Delivery experience in both lean startup settings and larger organisations, with ownership from start to finish. You scope a sensible first version and build on it. Strong, hands-on cloud engineering on AWS at organisational scale: multi-account setups, identity and access, networking, and account-level guardrails. A security-first instinct: least privilege, secrets management, and treating patching and vulnerability remediation as routine work. Deep, hands-on experience with infrastructure as code. You have built and maintained real production estates in Terraform, or a close equivalent, and you are comfortable owning delivery pipelines on AWS. Nice to have Experience with monorepo build systems and shared tooling. Previous cloud-migration work. A track record of building internal command-line tools or code generators. Public technical work, such as open-source contributions or writing. Ways of working This is a hands-on individual-contributor role on