1KOMMA5° was founded in summer 2021 by entrepreneurs and industry experts with the aim of making buildings holistically CO2 neutral through the use of photovoltaics, heat pumps and charging infrastructure. This is implemented by providing technology for decentralized, clean energy, mobility and heat supply. Thanks to the intelligent energy management “Heartbeat” and the dynamic electricity tariff “Dynamic Pulse”, 1KOMMA5° always guarantees the cheapest and cleanest electricity from sun and wind. 1KOMMA5° participates in particularly innovative craft businesses in the areas of photovoltaics, electricity storage, charging infrastructure and heat pumps, on the one hand to strengthen regional crafts and on the other hand to enable high-quality advice and installation at the customer's site. 1KOMMA5° currently operates over 65 locations with around 1,500 employees from Europe to Australia. In addition, 1KOMMA5° is working on networking and controlling decentralized generation systems with the aim of fully realizing the potential of the decentralized energy transition. For this purpose, all installed systems become part of a networked IoT platform, which uses algorithms to guarantee optimal, automatic operational management over the life of the system.

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Holistic CO2-neutral buildings with decentralized clean energy, mobility, and heat supply solutions.

1KOMMA5° We are looking for you as an addition to our tech-team in Berlin, Munich or Hamburg. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission! Learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission You will work on transforming the business of renewable technology installation. With our Operating System software we streamline ground operations and rooftop installation to speed up the energy transition in private homes and small businesses.  As a Senior Software Engineer in 1KOMMA5°, you will be one of the first members of a cross-functional team alongside frontend and backend engineers, product managers and UX/UI developers. You will help build a self-organised tech team, responsible for developing, deploying and running their own solutions to contribute to those work streams. Cloud Architects and SREs will enable you to easily deliver and run software in a consistent, secure and reliable way. Key responsibilities include but are not limited to: <ul><li>Building and shaping a business critical application  </li><li>Create, implement, evaluate and deploy software solutions to solve complex problems in a simplified way </li><li>Lay the foundation and architecture for lightweight, flexible and reliable application setups to scale globally </li><li>Foster a culture of experiment-driven innovation within the team </li><li>Promote teamwork and successful project execution </li><li>Improve developer satisfaction by constantly avoiding/reducing tech-dept, automating as much as possible and documenting decisions, runbooks etc. </li><li>Work across your boundaries and interact in close collaboration with our stakeholders and other teams</li></ul> Your profile You check most of the following boxes: <ul><li>proven experience in developing scalable software solutions with TypeScript (NestJS / Node.js) from several past projects </li><li>experience with React, Vue.js, Node.js and Next.js in large scale applications is a clear plus </li><li>a broad knowledge of various architectural patterns and experience implementing them with CI/CD using GitHub Actions and cloud infrastructure (GCP/Vercel) </li><li>worked in a cross-functional team being responsible for the full software development lifecycle </li><li>passion for maintainable, documented, reusable, and testable code </li><li>profound spoken and written English skills, German is a plus </li><li>an agile and result-oriented mindset and you consider yourself a team player </li><li>and interest in human-centred software development </li></ul>We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies. Benefits <ul><li>You will be part of a young, dynamic and highly motivated team with people who have proven that they can make things happen and move companies forward </li><li>With your work, you support "energy and mobility transition" and make a concrete contribution to the sustainable transformation of our energy infrastructure </li><li>You are part of a fast growing company with a lot of development potential </li><li>You move in flat hierarchies and have direct contact with the managing directors as well as short decision-making paths </li><li>You will be welcomed by a young, close-knit and fast-growing team with an exciting task ahead </li><li>Work with and learn from other skilled engineers and join conferences and exciting meetups </li><li>The results of your work are immediately recognizable and have a direct positive impact on the transformation of the energy markets towards renewable energies </li><li>You build something independently and take responsibility </li><li>You work remotely (Germany-wide), with offices in are Hamburg, Berlin or Munich </li><li>You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li></ul>

Senior Backend Software Engineer - TypeScript (m/f/d) Munich, Berlin or Hamburg

1KOMMA5° was founded in summer 2021 by entrepreneurs and industry experts with the aim of making buildings holistically CO2 neutral through the use of photovoltaics, heat pumps and charging infrastructure. This is implemented by providing technology for decentralized, clean energy, mobility and heat supply. Thanks to the intelligent energy management “Heartbeat” and the dynamic electricity tariff “Dynamic Pulse”, 1KOMMA5° always guarantees the cheapest and cleanest electricity from sun and wind. 1KOMMA5° participates in particularly innovative craft businesses in the areas of photovoltaics, electricity storage, charging infrastructure and heat pumps, on the one hand to strengthen regional crafts and on the other hand to enable high-quality advice and installation at the customer's site. 1KOMMA5° currently operates over 65 locations with around 1,500 employees from Europe to Australia. In addition, 1KOMMA5° is working on networking and controlling decentralized generation systems with the aim of fully realizing the potential of the decentralized energy transition. For this purpose, all installed systems become part of a networked IoT platform, which uses algorithms to guarantee optimal, automatic operational management over the life of the system.

Inside Sales Manager (m/w/d) Photovoltaik Vertrieb & Beratung im Innendienst - 1KOMMA5° Hannover

Project Manager - Energy Processes & Operations (m/w/d)

1KOMMA5° We are looking for you as an addition to our tech-team in Berlin. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission! Become a part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission In tech we have two main work streams: <ul><li>Heartbeat: Building a virtual power plant levering our energy manager “Heartbeat” and evolving the customer experience app around this</li><li>Operating System for installation companies: Digitisation of operations and processes from ground operations to rooftop installations</li></ul>As an IoT Software Engineer, you will play a crucial role in integrating OEM devices, such as PV inverters, batteries, charging infrastructure, and heat pumps, into our cutting-edge heartbeat platform. Your role involves implementing communication protocols, developing embedded software modules on IoT gateway and controller devices, and conducting testing of our energy management system in our lab in Berlin. You will also be providing expert level support for both internal and external stakeholders. Collaborating with cross-functional teams, you'll contribute to the entire product lifecycle. Key responsibilities include but are not limited to: <ul><li>Integrate PV inverters, batteries, charging infrastructure, and heat pumps into our heartbeat platform</li><li>Ensure seamless communication and interoperability between different OEM devices</li><li>Implement communication protocols such as Modbus TCP, OCPP, MQTT, EEbus</li><li>Develop, deploy, and maintain embedded software modules on IoT gateway and controller devices using Go programming</li><li>Maintain and customize embedded Linux distributions using Yocto for IoT gateway devices</li><li>Conduct testing of our energy management system in our lab in Berlin</li><li>Collaborate with cross-functional teams to ensure software meets performance and reliability standards</li><li>Provide expert-level support to both internal and external stakeholders</li></ul> Your profile You have: <ul><li>Bachelor's or Master's degree in Computer Science, Electrical/Electronics Engineering, Control Engineering or related field</li><li>Proven experience in IoT development and integration, with a focus on integrating diverse OEM devices</li><li>Hands-on experience in the development of embedded software modules for IoT devices</li><li>Experience with IoT development using Go programming is highly preferred</li><li>Experience with Linux build systems, particularly Yocto, is strongly favored and will provide a competitive edge for this role</li><li>Proficiency in communication protocols such as Modbus TCP, OCPP, and MQTT</li><li>Understanding of energy management systems and related technologies</li><li>Familiarity with DevOps practices and tools, including continuous integration and deployment (CI/CD) pipelines</li><li>Excellent troubleshooting and problem-solving skills</li><li>Experience quickly finding your way around in cross-functional teams in a fast pace, interdisciplinary working environment</li><li>An agile and result-oriented mindset and you consider yourself a team player</li><li>Very good knowledge of spoken and written English, German is a plus</li></ul>Bonus points for: <ul><li>Experience in model-based development with Matlab/Simulink</li><li>Familiarity with cloud platforms (ideally Google cloud) and their integration in IoT solutions</li><li>Experience in implementing APIs for complex systems</li><li>Previous experience in providing support to international stakeholders</li><li>Certifications related to IoT and energy management</li><li>Interest in climate tech industry</li></ul>Even if you do not meet all the listed requirements, we still encourage you to apply and reach out to us. We value diverse experiences and believe that the right candidate may bring unique skills and perspectives to the role We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies. Benefits <ul><li>Contribute to a dynamic and highly motivated team with people who have proven that they can make things happen and move companies forward</li><li>With your work, you accelerate the "energy and mobility transition" and make a concrete contribution to the sustainable transformation of our energy infrastructure</li><li>You move in flat hierarchies and have direct contact with the managing directors as well as short decision-making paths</li><li>Work with and learn from other skilled engineers and join conferences and exciting meetups</li><li>You can work remotely (Germany-wide), with offices in Berlin, Hamburg and Munich</li><li>See the direct impact of your work on a rapid-scaling user base</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li></ul>

(Senior) Software Engineer - IoT (m/f/d) Berlin

1KOMMA5° We seek a highly skilled Senior Backend Software Engineer to join our growing tech team. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation, and services related to solar, heat pumps, electricity, and charging infrastructure. And they are all connected! Be a part of our mission!Learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission As a member of the B2C domain, you will build a virtual power plant leveraging our energy manager "Heartbeat", and continuously ship innovative energy market solutions to our customers.You will be responsible for developing scalable, robust backend services that enable seamless integration of our energy management solutions with various energy markets.Key responsibilities include:<ul><li>Work collaboratively with product managers, data engineers, and data scientists to understand problems, support discoveries, and create solutions our customers love</li><li>Build and optimize backend services for VPP operations and energy market integrations</li><li>Design and implement APIs and abstraction layers for seamless communication between different components of our energy market integration solutions</li><li>Optimize backend services for scalability and support for a large number of connected users</li><li>Create, implement, evaluate, and deploy software solutions to solve complex problems in a simplified way</li><li>Foster a culture of experiment-driven innovation within the team</li><li>Promote teamwork and successful project execution</li><li>Continuously improve developer satisfaction by avoiding/reducing tech debt, automating processes, and good documentation</li><li>Work across your boundaries and interact in close collaboration with our stakeholders and other teams</li></ul>Technologies you will work with include:<ul><li>TypeScript, NestJS</li><li>Google Cloud Platform (Cloud Run, Cloud Functions, PubSub, CloudSQL, Firestore, BigQuery)</li><li>Domain-driven design architecture</li><li>Datadog</li><li>Terraform</li><li>GitHub Actions</li></ul> Your profile The successful candidate will have:<ul><li>Proven experience in developing scalable backend solutions with TypeScript from several past projects</li><li>Competence in building virtual power plant infrastructure, including the integration into energy markets (day-ahead, intraday, balancing services, etc).</li><li>Hands-on experience working with interfaces in the context of energy services (e.g., smart meters, energy optimization, load balancing).</li><li>Broad knowledge of various architectural patterns and experience implementing them with CI/CD using GitHub Actions and cloud infrastructure (ideally GCP)</li><li>Passion for maintainable, documented, reusable, and testable code</li><li>A finger on the pulse of software engineering trends and industry best practices</li><li>An agile and product-oriented mindset and you consider yourself a team player</li><li>Very strong written and spoken English skills, German is a plus</li></ul>Bonus points for:<ul><li>Experience with IaC (ideally Terraform)</li><li>Experience Python in the context of Data Engineering or Machine Learning</li><li>Experience with IoT applications for grid balancing and demand response</li></ul>We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies. Benefits <ul><li>Contribute to a dynamic and highly motivated team with people who have proven that they can make things happen and move companies forward</li><li>With your work, you accelerate the "energy and mobility transition" and make a concrete contribution to the sustainable transformation of our energy infrastructure</li><li>You move in flat hierarchies and have direct contact with the managing directors as well as short decision-making paths</li><li>Work with and learn from other skilled engineers and join conferences and exciting meetups</li><li>You can work remotely (Germany-wide), with offices in Berlin, Hamburg and Munich</li><li>See the direct impact of your work on a rapid-scaling user base</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li></ul>

Senior Backend VPP Software Engineer - TypeScript (m/f/d)

1KOMMA5° We are looking for you as an addition to our tech-team in Berlin, Hamburg, Munich or remote. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission! Become a part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission As a member of the B2C domain, you will build a virtual power plant leveraging our energy manager "Heartbeat", and continuously ship innovative energy market solutions to our customers through our 1KOMMA5° App.As an engineering manager in 1KOMMA5°, you will be leading up to two cross-functional teams alongside frontend and backend engineers, product managers and UX/UI developers. You will help build a self-organised tech team, responsible for developing, deploying and running their own solutions. Key responsibilities include but are not limited to:<ul><li>Provide technical leadership, guidance, and expertise across 2 - 3 app teams and be part of the hiring process to find the best talents</li><li>Be an excellent people manager and support your team members in their professional and personal development</li><li>Help your team members to create, implement, evaluate, deploy, sustain, and enhance software solutions for complex and undefined problems</li><li>Foster a culture of experiment-driven innovation within the team</li><li>Promote teamwork and successful project execution</li><li>Improve developer satisfaction by constantly avoiding/reducing tech-dept, automating as much as possible and documenting decisions, runbooks etc.</li></ul> Your profile You have:<ul><li>Bachelor's or Master's degree in Computer Science, Engineering or related field</li><li>At least 5 years of proven experience in software engineering in a fast paced and scalable environment</li><li>At least 3 years of experience in leading cross-functional and agile software engineering teams working with cutting edge technologies on distributed systems </li><li>Systematic problem-solving approach, coupled with effective communication skills in English, German is a plus</li></ul>Technologies your team will work with include:<ul><li>Typescript</li><li>JavaScript/NodeJS (VueJS/NestJS)</li><li>NodeJS</li><li>Python (data ingestion / data lake)</li><li>Google Cloud Platform (Cloud Run, Cloud Functions, CloudSQL, Firestore, BigQuery …)</li><li>Terraform</li><li>PostgreSQL</li><li>Microservice architecture</li><li>IoT applications</li></ul>Bonus points for:<ul><li>Experience in climate tech and especially energy industry</li></ul>We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies. Benefits <ul><li>You will be part of a young, dynamic and highly motivated team with people who have proven that they can make things happen and move companies forward</li><li>With your work, you support "energy and mobility transition" and make a concrete contribution to the sustainable transformation of our energy infrastructure</li><li>You are part of a fast growing company with a lot of development potential</li><li>You move in flat hierarchies and have direct contact with the managing directors as well as short decision-making paths</li><li>You will be welcomed by a young, close-knit and fast-growing team with an exciting task ahead</li><li>Work with and learn from other skilled engineers and join conferences and exciting meetups</li><li>The results of your work are immediately recognizable and have a direct positive impact on the transformation of the energy markets towards renewable energies</li><li>You build something independently and take responsibility</li><li>You work remotely (Germany-wide), with offices in are Hamburg, Berlin or Munich</li><li>You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li></ul>

Engineering Manager (m/f/d) Berlin, Hamburg, Munich

Werkstudenten (m/w/d) Event & Marketing - 1KOMMA5° Frankfurt

Werkstudent*in Business Intelligence (m/w/d)

Technische Aufnahme (m/w/d) für Photovoltaik & Energiesysteme - 1KOMMA5° Leipzig

Teamlead Indirekter Einkauf (m/w/d)

1KOMMA5° We are looking for you to join our tech team in Berlin, Munich, or Hamburg. 1KOMMA5° is creating Germany's largest one-stop-shop for the sale, installation, and servicing of solar panels, heat pumps, electricity solutions, and charging infrastructure. And the best part? They are all interconnected! Become a part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission You will work on transforming the business of selling renewable technologies. With our core marketing automation and CRM systems, we innovate growth processes to power the energy transition in private homes and small businesses world-wide. As a Junior Software Engineer at 1KOMMA5°, you will work alongside experienced Fullstack Engineers and a Product Manager in a collaborative team environment. You'll contribute to building and maintaining software solutions while learning best practices in development, deployment, and operations. With mentorship and support, you’ll grow your technical skills and help the team deliver impactful solutions. Our Stack: <ul><li>Next.js/TypeScript for frontend applications &amp; NestJS/TypeScript for backend applications</li><li>TypeScript for CRM customizations &amp; workflow automation</li><li>Ruby on Rails for one API-only application</li><li>Infrastructure as code, deployment to Google Cloud, observability with Datadog</li><li>Google Cloud Tasks and Delayed Job for background jobs</li></ul> Your profile Key responsibilities include but are not limited to: <ul><li>Contribute your skill and motivation to a team of self-driven software engineers</li><li>Extending and maintaining business critical applications</li><li>Help shaping actionable requirements from complex and undefined business problems</li><li>Foster a culture of experiment-driven innovation</li><li>Improve developer experience by constantly avoiding/reducing tech-debt, automating as much as possible and documenting decisions, runbooks etc.</li></ul>You have: <ul><li>Some experience writing maintainable, self-describing, reusable, and testable code with TypeScript and other major back-end or full-stack technologies.</li><li>Basic knowledge of designing and maintaining RESTful APIs.</li><li>An agile and results-oriented mindset with a passion for supporting your team.</li><li>A creative and enthusiastic approach to tackling new challenges, contributing to an ambitious and dynamic company</li><li>Excellent knowledge of spoken and written English, German is a plus</li><li>Residency in Germany</li></ul> Benefits <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></ul>

Junior Software Engineer TypeScript (m/f/d)

Head of Sales - (m/w/d) - 1KOMMA5° Südbayern

Auftragsmanager (m/w/d) Photovoltaik & Energiesysteme - 1KOMMA5° Berlin

Werkstudent*in Customer Care Projekt- & Prozessmanagement (m/w/d)

Key Account Manager*in (m/w/d) Photovoltaik Gewerbe- & Großanlagen - 1KOMMA5° Commercial (deutschlandweit)

Werkstudent (m/w/d) zur Unterstützung der technischen Leitung - 1KOMMA5° Rostock

Meister SHK (m/w/d) Wärmepumpen & Heiztechnik - 1KOMMA5° Weimar

Lager- und Logistikkoordinator (m/w/d) - 1KOMMA5° Rostock

1KOMMA5° At 1KOMMA5°, we are building Europe's leading energy software platform “Heartbeat”, creating a virtual power plant that links customers' photovoltaics, electricity storage, heat pumps and charging stations and thus significantly increases the profitability of networked customer systems. We also offer customers a “one-stop-shop” for purchasing and installing individual and intelligent energy system solutions so that every household can quickly and professionally live, heat and be mobile in a climate-neutral way. At the same time, we are working in our technology division on the further development and expansion of the Heartbeat software in order to connect customers worldwide with the electricity market and thus always be able to offer the cheapest and cleanest electricity tariff. Become part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission <ul><li>Cost controlling &amp; budget management: Implementation of detailed cost controlling for various development projects and products to ensure transparency and efficiency</li><li>Financial planning &amp; forecasting: Establishment and continuous development of budget and forecasting processes for the strategic management of financial resources</li><li>Profitability analysis &amp; scaling strategy: development of measures for medium-term profitability and positioning as a relevant player in the energy market</li><li>Operational financial management: Ensuring efficient bookkeeping, accounting and financial processes in collaboration with internal and external stakeholders</li><li>Investment &amp; resource allocation: evaluation and prioritization of investments in technology, personnel and infrastructure for optimal use of funds</li><li>Reporting &amp; communication: preparing regular financial reports and deriving strategic recommendations for management and the global finance organization</li></ul> Your profile <ul><li>Degree in business administration, finance or comparable qualification</li><li>Several years of professional experience in controlling, management or commercial management</li><li>You are characterized by analytical and strategic thinking and excellent communication skills</li><li>You enjoy making decisions and solving problems</li><li>You also have a high level of initiative and a hands-on mentality</li><li>Fluency in German and English</li></ul> Benefits <ul><li>You have the opportunity to work in our brand new offices in Hamburg city center, Berlin &amp; Munich and/or remotely</li><li>Use your MacBook &amp; iPhone outside of work in your free time </li><li>You are part of a fast-growing company with a lot of development potential, where you can build something independently and feel your impact</li><li>Work in flat hierarchies, take on responsibility during your induction and work directly with parts of the management team</li><li>With your work, you support the megatrend of the energy and mobility transition and make a concrete contribution to the sustainable transformation of our energy infrastructure</li><li>Be active and take advantage of over 7,600 sports partners with the EGYM Wellpass</li><li>Benefit from benefits &amp; discounts through Futurebens</li></ul>

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