Open-Xchange

Role Description Are you a motivated student who wants to combine sustainability, data, and technology while gaining hands-on experience in ESG management within an international software company? Your new job: - ESG data & carbon footprint - Collect, structure, and validate ESG and carbon data across teams, entities, and value-chain partners. - Help build and continuously improve OX’s ESG data backbone using digital tools and ESG software — driving better data quality, consistency, and transparency. - Support carbon footprint calculations by researching data sources, preparing assumptions, and documenting methodologies and estimates. - Customer requirements & ESG communication - Support the analysis of ESG-, sustainability-, and climate-related customer requirements and help translate them into clear, actionable insights. - Contribute to ESG-related RFP/RFI responses and support the creation of scalable ESG documentation, templates, and knowledge resources. - Climate policy & internal enablement - Research emerging best practices and market expectations around climate strategy, carbon accounting, and sustainability reporting. - Support climate-related policies and internal ESG initiatives while helping embed sustainability knowledge across the organization. Qualifications - Currently enrolled as a student and having successfully completed the first semesters in a relevant degree such as Sustainability Management, Environmental Sciences, Business Administration, Business Analytics, Business Informatics, Corporate Responsibility, or a comparable field. - Interest in ESG, sustainability, and carbon footprint management within an international business environment. - Enjoy working with data, structuring information, and improving data quality and transparency. - Reliable, detail-oriented, and well-organized working style with the ability to work independently. - Motivation to contribute ideas, take ownership of tasks, and learn new topics in a dynamic environment. - Strong communication skills and confidence in collaborating with different stakeholders and teams. - Strong verbal and written communication skills in English; German language skills are a plus. Benefits - A meaningful working student role in an international environment where you can contribute directly to ESG and climate initiatives. - The flexibility to work up to 100% remotely or in one of our German offices, creating a setup that fits your personal needs and study situation best. - Flexible working hours that allow you to successfully balance your studies, home life, and work responsibilities. - Getting together in-person for workshops and fun team events. - Sign up to Urban Sports Club and Corporate Benefits. - An open, inclusive and supportive company culture that values openness, diversity, responsibility, continuous learning, and actively encourages questions, ideas, and initiative. Company Description At Open-Xchange (OX), we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. We believe that responsible business means understanding our environmental impact, improving transparency, and enabling meaningful climate action through reliable ESG data and accessible sustainability information across the company.

Role Description Are you a driven sales professional who wants to make an impact by growing strategic Hosting and Telco accounts, delivering customer value, and driving sustainable revenue growth? At Open-Xchange (OX), we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Your new job: - Own and grow a portfolio of key Hosting and Telco accounts across North America, driving both new business and long-term expansion. - Build and maintain strong relationships with senior stakeholders, acting as the trusted advisor and primary point of contact throughout the customer lifecycle. - Align internal teams (product, engineering, operations) around customer needs, ensuring successful delivery while balancing commercial objectives. - Identify growth opportunities by understanding customer and market needs, and lead upsell and expansion initiatives end-to-end. - Represent the voice of the customer internally, influencing product direction and helping close gaps between expectations and delivery. - Take full ownership of revenue-related KPIs, including customer satisfaction, retention, and growth. - Travel across the Americas (USA, Canada, and South America) as required to support customer engagement and business development. Qualifications - Senior sales professional with a proven track record of successfully selling into Hosting and/or Telco markets in North America. - Strong experience managing complex sales cycles and building strategic customer relationships. - Revenue-driven mindset with a strong focus on growth, upselling, and achieving commercial targets. - Solid understanding of cloud, infrastructure, or messaging technologies, with the ability to translate technical value into business outcomes. - Familiarity with messaging technologies and/or messaging-anti-abuse, particularly email systems and mail server platforms such as Dovecot. - Knowledge of open-source ecosystems and commercial messaging solutions is a plus. - Ability and willingness to work primarily within East Coast US business hours to effectively engage with customers and internal stakeholders. - Self-driven and comfortable operating in a remote-first, fast-moving environment. - Strong verbal and written communication skills in English. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Comfortable working in a remote-first environment with multicultural teams across different time zones. Benefits - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer – and mental health support when you need it. - We provide financial relief through a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Company Description We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Join the team Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Your contact person Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.

Title: Senior Software Engineer (C++) / Platform Engineer (m/f/d) Location: Italy United States Italy, Austria, Finland, France, Germany, Netherlands, Spain Full or part-time Permanent employee Job Description: Are you a motivated Senior C++ or Platform Engineer ready to make an impact within a multicultural environment?At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Discover what Open-Xchange offers you: - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company's success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your team: You'll join our platform engineering group and work on the systems that power our cloud-native product. Together with experienced engineers across development, operations, and customer-facing teams, you'll help keep our platform reliable, performant, and ready for the future. Your new job: - Ensure the stability and reliability of our core product by maintaining and extending a moderately complex C/C++ codebase. - Develop and refine Lua-based configuration logic and policy definitions, contributing to automation and system-wide behavior. - Support automated cluster operations by contributing to lightweight Golang components that interact with our Kubernetes environment. - Manage and further develop our Kubernetes setup, including Helm charts, cluster-setup tooling, and deployment workflows. - Own and improve packaging and release engineering processes, ensuring consistent, automated, and high-quality product distribution. - Enhance internal testing frameworks, increase coverage, and contribute to the overall reliability and quality of the system. - Provide Level-3 engineering support, diagnose complex issues across the stack, and collaborate with operations to ensure stable cloud-hosted deployments. This is the tech stack you'll be working with: Your background: - Several years of professional experience as a software engineer with a strong C++ foundation. - Comfortable working across multiple languages and tackling system-wide challenges. - Practical experience with Kubernetes and cloud-native deployment models. - Strong grasp of both architectural and operational aspects, with an understanding of real-world behavior in distributed systems. - Strong verbal and written communication skills in English. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Comfortable working in a remote-first environment with multicultural teams across different time zones. This is what you get at Open-Xchange: - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer - and mental health support when you need it. - We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Join the team: Join us in our fight for an open internet and deliver added value! Click "Apply now" to submit your application. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX. English Senior Software Engineer (C++) / Platform Engineer (m/f/d) Italy, Austria, Finland, France, Germany, Netherlands, Spain Full or part-time Permanent employee Are you a motivated Senior C++ or Platform Engineer ready to make an impact within a multicultural environment? At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Discover what Open-Xchange offers you: - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company's success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your team: You'll join our platform engineering group and work on the systems that power our cloud-native product. Together with experienced engineers across development, operations, and customer-facing teams, you'll help keep our platform reliable, performant, and ready for the future. Your new job: - Ensure the stability and reliability of our core product by maintaining and extending a moderately complex C/C++ codebase. - Develop and refine Lua-based configuration logic and policy definitions, contributing to automation and system-wide behavior. - Support automated cluster operations by contributing to lightweight Golang components that interact with our Kubernetes environment. - Manage and further develop our Kubernetes setup, including Helm charts, cluster-setup tooling, and deployment workflows. - Own and improve packaging and release engineering processes, ensuring consistent, automated, and high-quality product distribution. - Enhance internal testing frameworks, increase coverage, and contribute to the overall reliability and quality of the system. - Provide Level-3 engineering support, diagnose complex issues across the stack, and collaborate with operations to ensure stable cloud-hosted deployments. Your background: - Several years of professional experience as a software engineer with a strong C++ foundation. - Comfortable working across multiple languages and tackling system-wide challenges. - Practical experience with Kubernetes and cloud-native deployment models. - Strong grasp of both architectural and operational aspects, with an understanding of real-world behavior in distributed systems. - Strong verbal and written communication skills in English. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Comfortable working in a remote-first environment with multicultural teams across different time zones. This is what you get at Open-Xchange: - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer - and mental health support when you need it. - We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Join the team:

Our mission: Are you a motivated QA Engineer who wants to make an impact by ensuring the quality and reliability of scalable cloud-based applications through thoughtful testing and continuous improvement?At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Discover what Open-Xchange offers you: - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your team: You'll be part of the Cloud Connect team, working on building and operating scalable, reliable cloud-based solutions. The team collaborates closely with development, operations, and customer-facing units to deliver high-quality services. Your new job: - Ensure high quality in custom software projects. - Analyze and assess risks related to client requirements. - Design, maintain, execute, and document (automated) tests. - Collaborate closely with project teams and technical client departments. - Actively support development and operations teams. This is the tech stack you'll be working with: Your background: - Degree in computer science or a comparable qualification with relevant experience. - Experience working with agile methodologies in software testing and development. - Solid understanding of web-based applications and APIs. - Basic knowledge of tools, methods, and programming languages for test automation. - Strong attention to detail, user expectations, and potential sources of error, combined with a structured and results-oriented working style. - Willingness to learn new technologies, contribute innovative ideas, and collaborate effectively within a team. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Strong verbal and written communication skills in both German and English. - Comfortable working in a remote-first environment with multicultural teams across different time zones. This is what you get at Open-Xchange: - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer – and mental health support when you need it. - We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Join the team: Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.

Role Description Are you a motivated engineer who wants to make an impact by developing and operating scalable MTA platforms while designing systems to detect, prevent, and mitigate abuse? At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Your team will focus on developing and maintaining the OX Cloud MTA platform and Anti-Abuse systems. You’ll contribute to the implementation of architectural decisions and apply your expertise to ensure the platform’s reliability, stability, and security. Your work will focus on: - Contribution to the development and maintenance of the OX Cloud MTA platform and Anti-Abuse tooling. - Design and continuous improvement of technical processes to detect, prevent, and respond to abuse across the OX Cloud platforms. - Optimization of workload efficiency through automation of routine tasks and enhancement of monitoring tools and processes. - Cross-functional collaboration to support product delivery and ensure alignment with team objectives and priority projects. - Development and sharing of expertise in abuse analysis, investigation techniques, and relevant tools within the team. - Development of internal components as well as responsibility for deploying and maintaining them at scale. This is the tech stack you'll be working with: - Operating system: Linux - Protocols and standards: SMTP, SPF, DKIM, DMARC - Containerization, orchestration, and infrastructure management: Kubernetes, OpenStack, Terraform, Ansible - Programming languages: Golang, Python Qualifications - Hands-on experience as an Anti-Abuse Engineer or Software Engineer. - Experience with distributed architectures, ideally in Kubernetes-based environments. - Familiarity with the MTA and AVAS vendor landscape, combined with a strong interest in automation across delivery monitoring and abuse handling. - Analytical mindset with enjoyment in solving complex security and deliverability challenges. - Continuous drive to improve abuse detection and prevention approaches, including testing and refining solutions. - Interest in evolving standards and willingness to work with RFCs when needed. - Strong verbal and written communication skills in English. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Comfortable working in a remote-first environment with multicultural teams across different time zones. Benefits - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer – and mental health support when you need it. - Financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - Further location-related benefits can be discussed in an initial talk. Join the team Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.

Our mission: Are you a motivated Professional Services / Support Engineer who wants to make an impact by helping organizations design, deploy, and operate reliable DNS infrastructure?At PowerDNS, part of the Open-Xchange company, we help telcos, enterprises, and internet infrastructure providers run critical DNS services that power the global internet. Our software is used by organizations around the world to deliver reliable, scalable, and secure DNS platforms. Your background: We are looking for a candidate who combines deep technical expertise with a service-oriented mindset. - Deep understanding of DNS functions and deployments across a variety of environments. - Experience with commonly used technologies in the ecosystem such as Ansible, Helm, Linux, Kubernetes, AWS, GCP, and similar tools. - Strong verbal and written communication skills, with Spanish fluency strongly preferred and English fluency required. - Proactive mindset to identify issues early and drive thoughtful, effective solutions. - Collaborative team-oriented approach with enthusiasm for sharing knowledge, learning from others, and creating documentation. - Comfortable working in a remote-first environment with multicultural teams across different time zones. - Bonus: Knowledge of the function and use of PowerDNS products and/or related software. This is what you get at Open-Xchange: - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work, while aligning with US-compatible working hours and ensuring availability to pick up support tickets within our SLA. - Getting together in-person for workshops and fun team events in the US and Europe. - Time off to volunteer – and mental health support when you need it. - We provide financial relief by offering a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Join the team: Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Discover what Open-Xchange offers you: - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX. Your team: As a Professional Services / Support Engineer for PowerDNS, you'll play a critical role in bridging the gap between our technical solutions and customer success. You'll be responsible for the full lifecycle of customer engagement, from design to delivery to troubleshooting and incident resolution. Your new job: - Provide expert guidance through network design, implementation, deployment, monitoring, and migration services and training, covering both single-site and multi-site configurations. - Solve complex challenges by handling troubleshooting, incident management, and resolution of open PowerDNS customer support tickets. - Facilitate solutions through effective communication with customers and other stakeholders to enable workarounds when necessary and ensure smooth operations. - Collaborate across teams in close cooperation with members of the PowerDNS Americas cell and colleagues from other PowerDNS cells to continuously improve our products, services, and working environment. - Build relationships as a technical resource for both internal teams and customers during projects, fostering strong, long-term partnerships. - Drive product evolution through communication with customers and PowerDNS product managers to share feedback and feature requests that help shape the future of our software. This is the tech stack you'll be working with: