Software Engineer – Elixir / Rust

Standort Wildpoldsried, BY, DE Berlin, BE, DE Stellen-ID: 5465 Join the energy revolution with #teamsonnen! At sonnen, we’re driven by a clear goal: creating a future powered by clean, affordable energy for everyone. That’s why we make our customers independent – not only from fossil fuels, but also from rising electricity costs. The key to this independence is our intelligent, all-in-one energy system. It combines solar panels, battery storage, energy tariffs, and wallboxes – all developed and manufactured in Germany. As the first and only provider in Germany, we also connect thousands of home batteries into one shared network: the sonnenVPP, our industry-leading virtual power plant. In short: every day, we’re working to shape the energy future. And we’d be thrilled to have you join us! Our Virtual Power Plant is a one-of-a-kind platform to provide grid services with sonnenBatterie-systems. By connecting household battery energy storage systems to our VPP, sonnen allows its customers to participate in ancillary services such as frequency control and demand response, further enabling the renewable energy revolution. What You Will Do To Help Drive Energy Transition Contribute to a distributed Virtual Power Plant controlling tens of thousands of home battery systems across 8 countries in real timeDesign, analyze, and improve algorithms for grid services — FCR, intraday trading, demand response, and spot optimizationDevelop algorithms that optimize energy use within individual households, balancing self-consumption and cost savings under dynamic energy pricesBuild and run simulations to model real battery behavior and validate algorithmic decisionsAnalyze data streams to monitor system health and develop new signals that add value to the VPPImplement protocols, backend services, and client features in a production Elixir/Rust codebase What You Will Need On That Journey Experience with Elixir, Rust, or Erlang — or strong motivation to learn. We hire at all experience levels.Solid foundation in algorithms and mathematics; you enjoy working through problems that don't have obvious solutionsComfortable reasoning about distributed systems, concurrency, or real-time constraints — or eager to develop that understandingExperience with functional programming (Clojure, OCaml, Haskell, Scala) or Python is a plusFluent in English. German is a plus. What You Can Expect At Sonnen An atmosphere of openness, tolerance and mutual respect, where innovation is expected and encouraged30-32 days annual vacation with increasing team membershipLeasing of company (e-)bikes with up to 40% discountFlexible working hours and option working mobileUse of sports memberships (EGYM Wellpass, only €29.75/month) and discounts for other services and products Employee discount on our electricity tariffRegular team and company eventsWe love dogs! You too? Feel free to bring your fellow friend to our offices You feel we are a match? Apply now and help us to shape the energy transition together. We look forward to welcoming you to #teamsonnen! sonnen - energy is yours! Stellensegment: Developer, Technology