Sulzer is a leading engineering company with a proud heritage of innovation. Join our global team to grow your expertise and develop innovative solutions that enable a prosperous and more sustainable society. About the role Join Sulzer as an IIoT Senior Solution Architect and help develop and scale Sulzer Edge, our in-house solution for securely moving data between shop-floor machines and operational technology (OT) environments and our business IT systems. This is a hands-on software engineering opportunity where you will work closely with the team behind Sulzer Edge, contributing directly to its development, deployment and evolution. You will build and test software, connect the solution to new industrial sites and solve the real-world networking, security and integration challenges that come with edge deployments. You will also play an important role in ensuring that the solution continues to meet relevant cybersecurity standards and regulatory requirements as it grows across our organization. What you will do: Develop and enhance Sulzer Edge, contributing new capabilities across Python services, shell scripts and the database layer. Build and test software locally using Docker and deploy solutions to Azure through CI/CD pipelines. Integrate the Edge solution with new sites and systems, including file servers, databases and machine interfaces with different protocols, ports and access requirements. Diagnose network and connectivity issues methodically and communicate technical findings clearly to network, infrastructure and security teams. Apply cybersecurity requirements, including IEC 62443 and the EU Cyber Resilience Act, to the technical design and operation of the solution. Implement secure approaches for certificates, secrets, authentication and least-privilege container environments. Support OT security activities for the industrial sites within the solution's scope. Maintain and update deployed Edge instances, including software running on edge devices in the field. Support testing, deployment, troubleshooting and ongoing maintenance of the solution. Document solutions, configurations and technical decisions to support reliable operation and future development. Collaborate with colleagues across software engineering, OT, IT infrastructure, networking and cybersecurity. What you need to succeed: Required: Approximately 5 to 7 years of relevant professional experience, or equivalent expertise gained through practical experience. Strong software development fundamentals and experience building and running production services. Solid programming skills, ideally including Python, together with shell scripting. Strong Linux command-line skills, including practical network troubleshooting. Hands-on experience with Docker, containers and Kubernetes. Experience working with SQL databases. Well-established software testing practices throughout development and deployment. Understanding of TLS, certificates, secrets and service-to-service authentication. Experience operating edge deployments, including maintaining and updating software on edge devices in the field. Ability to interpret relevant cybersecurity regulations and standards, such as IEC 62443 and the EU Cyber Resilience Act, and translate requirements into practical technical solutions. Ability to work independently, troubleshoot complex technical issues and take ownership of solutions. Clear communication and collaboration skills, including the ability to explain technical findings to colleagues in other disciplines. A curious, problem-solving mindset and willingness to learn unfamiliar technologies and environments. Preferred: Experience with Azure and Azure DevOps, including cloud deployment and CI/CD. Knowledge of industrial or OT protocols such as OPC UA, MQTT, Modbus or S7, or a strong willingness to learn them. Experience integrating applications with file servers and file-transfer services. Knowledge of Azure networking, infrastructure, security controls, identity and access management. Experience working with VPN-based or segmented network architectures. Experience with container hardening techniques, including least-privilege users, dropped capabilities, read-only filesystems and container security scanning. Experience managing application secrets through vaults or dedicated secret stores. Previous experience in a manufacturing, industrial or OT environment. A degree in computer science, engineering or a related field, or equivalent practical experience. What we offer you A permanent, full-time contract. A competitive salary as well as participation in the variable remuneration system based on personal and financial objectives. Meal vouchers Access to a voluntary flexible compensation scheme, allowing employees to optimize their salary package through benefits such as health insurance, transport or childcare. The opportunity to work on the intersection of software engineering, Industrial IoT, cybersecurity and operational technology. Be part of an experienced and international team working on a solution with direct application across industrial sites. A collaborative working environment where you can combine hands-on development with technical problem-solving. The opportunity to grow your career within a solid and well-established international engineering company. Be part of a dynamic organization undergoing continuous transformation and improvement. Offices Location: Nuevos Ministerios, Madrid. *Additional benefits may apply depending on the position and location.n/a Sulzer is an equal opportunity employer. We believe in the strength of a diverse workforce and are committed to offering an inclusive work environment. We are proud to be recognized as a Top Employer 2026 in Brazil, Canada, China, Finland, Germany, Ireland, Mexico, Switzerland, South Africa, the UK and the USA. Sulzer is a leading engineering company with a proud heritage of innovation. By supporting water and energy security, enabling the energy transition and driving the use of circular technologies, we help our customers build a better world. With more than 13’000 employees and 160 world-class production facilities and service centers across the globe, we are a globally diverse team. We value the uniqueness of all our colleagues, and we appreciate the contributions that each of us makes to the company’s success. We prioritize your health and safety and are committed to offering a work environment in which you can thrive. Join our team now to grow your expertise and develop solutions that truly make a difference! 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