Innovative point-of-sale (POS) system, as well as a back-office system (BOS) with analytics (advanced analytics and big data) and operational monitoring modules, as well as a mobile application for sales and customer loyalty in energy retail.

Technology stack

Back-end: Java, JEE (JAX-RS, CDI, JPA), Spring Stack (Spring IoC, Spring Boot, Spring Security, Spring Data)
Front-end: JavaScript, React.js
List of tools:
● Istio (API Gateway and service mesh, security, load balancing, metrics using Envoy sidecars -
● Terraform (infrastructure provisioning,
● Salt Stack (configuration management,
● RedHat OpenShift (as an alternative to proprietary cloud AWS / GCP solutions, this would be needed if
we go with an alternative provider which is currently also under discussion,
● Postgres DB (esp. operation and backups),
● ELK Stack (Elasticsearch, Logstash, and Kibana: Log aggregation and search -
● Prometheus (monitoring solution -
● Grafana (data visualization, e.g. based on Prometheus -
● Fluentd (log forwarding,
● Rabbit MQ (messaging system,
● Hashicorp Vault (secrets management, or comparable solution
● Kafka (Event streaming,

Main requirements

● expertise with either AWS or GCP;
● solid experience with Docker and ideally Kubernetes;
● strong Linux and networking skills;
● previous work experience in geographically dispersed teams;
● good command of English.
If the company picks AWS, you should ideally have come in contact with:
● EC2
● EC2 container registry
● ECS (Elastic container scaling)
● AWS cost and budgeting tools
● S3 storage
● RDS (managed relational DBs like Postgres)
● ELB (load balancing)
● AWS backup
● AWS IAM (secrets management)


● experience with any of the tools that are listed above in the tools section, or any similar tools.

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Job posted on 22 June 2022
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