Senior Professional Services Engineer - OX App Suite (m/f/d)

Your team:

You'll work in a dedicated cell built around one of our largest hosting customers - a provider running multiple brands on OX App Suite 8. Your closest collaborators are the Account Manager and Development Engineers, with Support looped in as needed. It's a largely independent seat, but you're one of several engineers across the company running the same model for other large accounts .

Your new job:

• Be present in the customer relationship - regular calls, occasional on-site visits, and persistent continuity that the customer's technical teams know you by name and trust your word.
• Build reference labs and generate reference configurations from them.
• Participate in OX-internal development of those frameworks.
• Analyze and resolve technical issues across the OX App Suite 8 stack. As L1/L2 is sitting with our customer your role is escalation-facing (L2/L3) taking ownership from escalation through to resolution and keeping the customer informed throughout.
• Translate customer feature requests and operational requirements into clear input for internal product and development teams, and feedback internal constraints to the customer in terms they can act on.
• Support the customer through upgrades, configuration changes, and new feature rollouts. Document solutions, workarounds, and deployment specifics - both for the customer and internally - and leave things better documented than you found them.

Formal on-call is not part of this role.

• A typical day mixes customer and internal calls, hands-on lab and reference-configuration work, and technical documentation - with occasional escalation support when a customer integration needs deeper troubleshooting.
• Limited travel is required for customer-facing meetings (~1-2 per quarter) and company-internal meetings (~1 per quarter).

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:

• Proven ability to hold your ground in a technical disagreement with a customer or partner, and to stay composed and credible when a large account escalates - you can point to specific situations where you did this.
• Solid hands-on experience with Linux-based server environments.
• Working knowledge of several core stack components -
• mail infrastructure (IMAP/SMTP, Dovecot or equivalent).
• relational databases (MariaDB/MySQL).
• containerized deployments on Kubernetes.
• Familiarity with monitoring and alerting (Prometheus/Grafana or equivalent) is part of staying ahead of issues rather than just reacting to them.
• We don't expect OX App Suite or Dovecot experience, we train it.
• Practical experience troubleshooting distributed systems in production: reading logs across multiple services, correlating symptoms, and working through problems with a clear method.
• Comfortable writing scripts to automate operational tasks or reproduce issues.
• Experience in a customer-facing technical role - support engineering, professional services, or similar - where you have taken ownership of an issue or requirement from first contact through to resolution.
• Familiarity with Helm-based deployments and the operational patterns that come with running multi-brand or multi-tenant hosting environments.
• Able to work across teams and communicate technical details to people with different backgrounds: you can represent a customer's operational reality in an internal engineering discussion and translate an internal constraint back to the customer without losing either side.
• Clear written communication is a requirement. Documentation and knowledge transfer are part of the job.
• Good written and spoken English is required as is fluency in German for this particular customer relationship.

This is what you get at OX:

• 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 Melanie ( Find more English Speaking Jobs in Germany on Arbeitnow

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Source: Statistisches Bundesamt (Destatis), table; dl-de/by-2-0; StarIn's calculation

Posted Oct 30, 2026