Hybrid DevOps/Platform Engineer – On-Prem Environments

at C4 Group

• Job title: DevOps/Platform Engineer – On-Prem Environments
• Job type: Contract
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Ansible, Docker, Grafana, Node.js, Postgres, Prometheus, Vault
• Location requirements: Hybrid, Munchen, Germany

About the role

• DevOps/Platform Engineer implementing on-prem infrastructure and deployment at C4 Energy GmbH. Building PoC and ensuring operational processes are followed in the project.

Responsibilities

• Implementation engagement to build the first on‑prem installation based on the refined architecture and stepwise plan defined by the Solution Architect.
• Build a running single‑node PoC on an on‑prem server using containerised workloads, deployed and managed via infrastructure as code (e.g. using tools such as Docker and Ansible), with the option to introduce lightweight orchestration tooling (e.g. Nomad or a similar scheduler) as appropriate.
• Establish a reproducible, automated infrastructure and deployment model (IaC) for the backend application(s) and data stores, aligned with the architecture and on‑prem constraints described in the use‑case documentation.
• Implement secure secrets handling and TLS setups for external and internal traffic using tools such as Ansible Vault, in line with the platform’s security requirements.
• Integrate and configure the observability stack (e.g. Prometheus, Grafana, Alertmanager and a logging stack) so that the backend application, platform components and databases can be monitored and operated reliably.
• Support the evolution from the initial single‑node PoC towards a small multi‑node setup for the backend application and databases, keeping the system stable, maintainable and ready for future extension.
• Take overall responsibility for the implementation of the on‑prem infrastructure and deployment model (IaC) for the backend application, ensuring that all provisioning and deployments are automated and repeatable.
• Design and evolve the Ansible‑based infrastructure as code (roles, inventories, group variables) for OS base, container runtime, orchestration tooling, backend application(s) and databases across environments (DEV, TEST and PROD).
• Define and implement the setup for running the backend application and additional infrastructure components in a small on‑prem cluster, including job definitions, basic health checks and placement concepts supporting 1 Hz device read/write requirements.
• Design and operate secure configuration and secrets management using tools such as Ansible Vault, TLS and PKI concepts, ensuring credentials and keys for services and databases are handled safely.
• Set up and operate core data stores (e.g. InfluxDB v3, Postgres) for the lab/PoC and follow‑on environments, including backup/restore procedures and disaster recovery readiness.
• Integrate and operate the observability stack (e.g. Prometheus, Grafana, Alertmanager), ensuring visibility into the backend application, infrastructure components and 1 Hz read/write behavior.
• Collaborate with the Full‑Stack Developer and Solution Architect to align health endpoints, logging formats, metrics and deployment patterns.
• Contribute to the definition and implementation of CI/CD pipelines and operational processes with a clear governance model based on version-controlled automation.
• Produce and maintain infrastructure-level documentation (deployment guides, operations runbooks, backup/restore procedures, incident handling guidelines).

Requirements

• At least 3 years of experience in DevOps, platform engineering or infrastructure automation roles.
• Strong hands‑on experience as a DevOps/Platform Engineer in on‑prem environments, ideally with data platforms or industrial/OT integrations.
• Solid skills in Ansible (or similar) for infrastructure as code: roles, inventories, group variables and automated provisioning.
• Practical experience with container orchestration tooling such as Nomad (or similar) for on‑prem deployments, including job specifications and rolling updates.
• Experience building and running containerised services using Docker, including multi‑stage builds and non‑root containers.
• Experience integrating observability stacks: Prometheus, Grafana, Alertmanager and centralized logging.
• Familiarity with time‑series and relational databases: e.g. InfluxDB and Postgres, including configuration and backup/restore.
• Experience implementing security and secrets management: Ansible Vault, TLS configuration and PKI concepts; familiarity with Keycloak or LDAP is a plus.
• Comfortable working in isolated on‑prem environments with limited or no direct internet connectivity.
• Ability to write clear technical documentation and runbooks.
• Language: English (required), German (a plus).

Benefits

• 600 hours remote / 200 hours on‑site / 20 hours travel