Fullstack Engineer (m/w/d)

sonnen Egypt · Cairo, Egypt · Posted 2026-04-24

StandortCairo, EGStellen-ID: 5306Join 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!What you will do to help drive the energy transition:Participate in the entire development process, including refinements, code reviews, tests, deployment and monitoring on production. Maintain and extend our Ruby on Rails based services.Implement user friendly frontends using modern technologies including Hotwire.Build and maintain GraphQL interfaces and RESTful endpoints (JSON:API).Convert acceptance criteria into test cases written in RSpec framework.Write new and update existing documentation entries.Contribute to the implementation of micro-services.Push and follow up on builds and deploys, using CI/CD pipeline tools.Collaborate with a development team on the planning and implementation of tasks, troubleshoot of issues, and refactoring.Interpretate log messages and mitigate errors coming from our monitoring tools.Collaborate closely with cross-functional teams in an Agile development environment, familiar with a Software Delivery Lifecycle following Scrum practices.What You Will Need On That Journey2+ years of full-stack experience with Ruby on Rails, RSpec and GraphQLProficiency with CI/CD processes (GitLab/GitHub), backend infrastructure (AWS) and monitoring tools (Datadog). You are keen on following architectural paradigms & object-oriented patterns.You are open-minded to follow instructions from other senior developers.You are outspoken and see feedback exchange as a normal part of your everyday work.You comfortably express your ideas and arguments in good spoken and written English.Stellensegment: Ruby on Rails, Testing, Technology

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About sonnen Egypt

Renewable Energy Equipment Manufacturing

At sonnen, we are building the energy system of the future. An energy system in which electricity is clean and people are the focus. To this end, we are developing new technologies and business models that have not existed before. Whether intelligent power storage, virtual power plants or digital services - we set the trends of a new energy world. This creates space for innovation, creativity, pas… read more

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