Backend engineer for plant data

alcemy is on a mission to keep 100 million tons of CO2 out of the atmosphere every year by 2030. Making concrete accounts for around 8% of global COz emissions, and our machine-learning software runs inside cement and concrete plants 24/7 to cut it - without sacrificing quality or driving up costs. We're already live in a third of Germany's cement plants and 30+ ready-mix concrete plants.

• You'll own the systems that get plant data into alcemy.
• You'll build and own the APIs and services that take it in, make sense of it, and feed the machine-learning models behind our recommendations - designing those systems, deploying them, keeping them running, and diagnosing what went wrong when something upstream changes without warning.
• You'll dig into real-world data, explain what you find to non-technical people, and make getting data into alcemy dramatically easier.
• above all, you care about climate change and want your work to count.
• You know how to deploy, monitor and troubleshoot production systems in a cloud environment
• You communicate clearly in writing and in conversation, and you collaborate well across roles
• You're comfortable working directly with customers, sales and customer success - patient, plain-spoken, and at ease with non-technical enterprise teams
• You pick up unfamiliar codebases quickly, and you're keen to contribute early
• You're open to using Al tools to augment how you work
• You won't be working alone - you'll build collaboratively alongside senior and junior engineers, owning features end to end: build, test, review, deploy.
• Small team, direct customer exposure, tast startup pace - so async communication, clear prioritisation, transparency, and direct feedback are the norm, and how we work is something we shape together, and keep improving.
• We use Claude Code responsibly: Al to move fast, engineers always in charge and accountable, no Al-slop merge requests.
• We'll ask you to be flexible. We don't have fixed teams or fixed projects here. As the business shifts, we'll ask you to move to where the work matters most and pick up new problems.
• Hybrid by design (Berlin Mitte office, up to 2 days remote, plus offsites and boat trips), with real room to grow along technical-expert or management tracks - and the chance to lead a product area within a couple of years.
• 25 days' vacation - plus an extra day for every 2 years here
• €1,500/year and 3 days/quarter for your own development