Our mission:
Are you an engineer with real technical depth AND do you want to own the relationship with one of our major hosting customer? Working through real production problems, translating operational needs into product improvements, and filling a role that matters to both sides? This combination is rare.
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.
Discover what OX 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 a dedicated team supporting one of our largest hosting customers, running multiple brands on OX App Suite 8. You'll work closely with the Account Manager, Development Engineers, and Support teams, taking ownership of technical challenges while collaborating with experienced engineers across OX who support other key customers.
Your new job:
Collaborate closely with customers and internal teams, combining hands-on technical work with solving complex challenges across our platform.
Build and maintain strong relationships with the customer's technical teams through regular communication, collaboration, and occasional on-site visits.
Build and maintain reference labs, develop reference configurations, and contribute to the internal development of the underlying frameworks.
Analyze and resolve technical issues across the OX App Suite 8 stack, taking ownership of escalated issues (L2/L3) through to resolution while keeping the customer informed throughout.
Translate customer feature requests and operational requirements into clear input for internal product and development teams, and communicate internal constraints back to the customer in a practical and understandable way.
Support the customer through upgrades, configuration changes, and new feature rollouts, while documenting solutions, workarounds, and deployment specifics for both the customer and internal teams.
The role involves occasional travel for customer meetings (approximately 1–2 trips per quarter) and internal company meetings (approximately 1 trip per quarter). Formal on-call duties are not part of this position.
This is the tech stack you'll be working with:
Scale 1-5 where 5 means “hands-on depth expected on day one” and 1 means “we expect nothing and train it on the job”:
OX App Suite 8 | 1 |
Kubernetes (Helm-based deployments) | 5 |
Mail infrastructure: Dovecot (CE / Pro), Postfix, IMAP/SMTP) | 2 |
Data layer: MariaDB, Redis | 3 |
Storage: Object storage (S3-compatible), Rook Ceph | 2 |
Identity: Keycloak, LDAP | 2 |
Observability: Prometheus, Grafana (or comparable stack) | 3 |
Tooling: Linux, Bash/Python, kubectl, Helm | 5 |
Networking: Istio (operational awareness, not configuration ownership) | 2 |
Your background:
Experience in a customer-facing technical role, such as support engineering or professional services, with the confidence to handle challenging technical discussions, communicate clearly, and take ownership of issues through to resolution.
Solid hands-on experience with Linux-based server environments.
Working knowledge of several core technologies, such as: Mail infrastructure (IMAP/SMTP, Dovecot or equivalent), relational databases (MariaDB/MySQL), containerized deployments on Kubernetes.
Experience with monitoring and alerting tools such as Prometheus and…