Principal Software Engineer (m/f/d)

<br><strong>1KOMMA5°</strong><p><span style="font-family:Arial, Helvetica, sans-serif;font-size:14px;">At <strong>1KOMMA5°</strong>, we pursue a clear vision: <strong>Living on wind and sunlight forever for free</strong>. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?<br>We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia.<br><br><strong>Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.</strong><br><br>Learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team!</span></p><br><strong>Your mission</strong><p><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:11pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Shape the organisation's technical strategy and innovation efforts</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Accountable for consistent execution of technical decisions by setting clear direction and holding teams accountable for implementation</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Ensure continuously that our software architecture is shaped in close alignment with product management to support current and future product direction</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Lead architectural direction to enable the delivery of scalable, maintainable, and state-of-the-art solutions</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Translate business requirements into technical solutions</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Tackle and resolve deep technical challenges with urgency and precision</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Mentor and challenge engineers to accelerate their professional growth</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Build and scale a high-performance tech organisation and engineering culture</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Embed security and reliability as direct customer value</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Architect our systems and APIs so AI agents operate as first-class users with machine-readable contracts and structured errors that let agents self-correct</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Drive the org's transformation to agentic engineering, reshaping how teams work so agents execute safely while humans stay accountable</span></p></li></ul><span style="font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;text-decoration:none;">Technologies you will work with include:</span><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:11pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">AI-assisted development with Cursor and agentic coding workflows</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Cloud &amp; Infra: Google Cloud Platform, GKE (Kubernetes), Cloud Run, Terraform/IaC, Vercel</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Messaging &amp; IoT: Eclipse Hono, MQTT, Mender</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Data &amp; BI: PostgreSQL, BigQuery, SQLMesh, Looker</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Observability: Datadog, OpenTelemetry</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Languages: TypeScript (Nest.js), Java, Go, Flutter, Ruby on Rails</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">DevOps: CI/CD pipelines (GitHub Actions)</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;padding:0pt 0pt 29pt 0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Linear, Notion, Figma, Miro</span></p></li></ul></p><br><strong>Your profile</strong><p><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:11pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Extensive hands-on experience in software development with multiple general-purpose programming languages for a minimum of 5 years</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">A proven track record of architecting scalable and secure systems, demonstrating a strong commitment to quality</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Extensive experience in designing and implementing APIs that enable seamless integration and system communication</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">An agile and result-oriented mindset, with a strong emphasis on collaboration and teamwork</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience communicating with stakeholders in business terms and understanding the technical implications of their requirements</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Industry-leading experience driving cross-functional teams and enforcing engineering alignment in fast-paced environments, including making and following through on critical technical decisions</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience designing systems and APIs for agent consumption, with structured errors and clear contracts that let agents self-correct</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Capability to guide an engineering team through the shift to agentic engineering, reshaping workflows so agents execute safely while humans stay accountable for every outcome</span></p></li><li style="list-style-type:disc;font-size:14px;font-family:Arial, Helvetica, sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;"><p style="line-height:1.7142857142857142;background-color:#ffffff;margin-top:0pt;margin-bottom:0pt;padding:0pt 0pt 29pt 0pt;"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Strong verbal and written communication skills in English, with proficiency in German considered a plus</span></p></li></ul></p><br><strong>Benefits</strong><p><ul><li>You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen</li><li>With your work, you accelerate the "energy transition" and hence have a direct impact on our climate</li><li>Work with and learn from other super-smart colleagues</li><li>You will enjoy direct contact with core decision-makers</li><li>You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups</li><li>You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li><li>Benefits and discounts are yours with Futurebens</li><li>Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time</li><li>Individualised opportunities for professional development</li><li>Reporting directly to the CTO</li></ul></p><p>Find more <a href="https://www.arbeitnow.com/english-speaking-jobs">English Speaking Jobs in Germany</a> on Arbeitnow</a>