Freelance Application Engineer / Administrator (L3 Expert)

Aricoma; Den Haag; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

Aricoma seeks an experienced Application Engineer / Administrator to support enterprise application operations within a large-scale ICT environment. The Hague, Netherlands offers near-site with remote work and limited on-site presence.

Start dates range from 14 December 2026 to 8 February 2027, with an initial 160 working days and potential extensions through July 2029. The role requires a university degree and extensive IT experience across Windows/Linux, Elasticsearch, Kubernetes, Docker, and

Qualifications

• University degree required.
• Minimum 9 years of relevant IT experience.
• Minimum 6 years in deploying, supporting and maintaining applications in medium-to-large IT environments.
• Minimum 5 years of Application Administration experience.
• Minimum 5 years working with Microsoft and/or Linux server environments.
• Minimum 2 years of experience with Elasticsearch administration, Kubernetes, Docker and containerized environments, and cloud solutions (Azure and/or AWS).

Responsibilities

• Install, configure, and administer applications in production and non-production environments.
• Monitor application availability, performance and capacity.
• Support incident, problem, change and release management activities.
• Administer Elasticsearch environments and container platforms.
• Automate operational and administration tasks.
• Create and maintain technical documentation, procedures and knowledge articles.
• Contribute to service improvement and operational excellence initiatives.

Skills

IT experience

Application administration

DevOps

Scripting

Education

University degree

Tools

Elasticsearch

Kubernetes

Docker

Rancher

Ansible

Puppet

Chocolatey

Job description

We are seeking an experienced Application Engineer / Administrator to support enterprise application operations, administration, and continuous improvement in a large-scale international ICT environment.

The Hague, Netherlands (nearsite, remote work with limited on-site presence)

Start Date: 14 December 2026 (latest start: 8 February 2027)

Initial Duration: 160 working days (40h/week) with extensions up to July 2029

Security Clearance: EU CONFIDENTIAL

Requirements

• university degree
• minimum 9 years of relevant professional IT experience
• minimum 6 years supporting, deploying, and maintaining applications in medium-to-large IT environments
• minimum 5 years of Application Administration experience
• minimum 5 years working with Microsoft and/or Linux server environments
• minimum 2 years of experience with: elasticsearch administration and support, kubernetes, docker and containerized environments, public or hybrid cloud solutions (azure and/or AWS)

Strong knowledge of:

• Elasticsearch cluster deployment and administration
• Kubernetes, Helm Charts, Docker, and Rancher
• Configuration management tools (Ansible, Puppet, Chocolatey or similar)
• PowerShell and/or Shell scripting
• ITIL processes (Incident, Change & Release Management)
• DevOps principles and practices

Nice to Have

• experience with PostgreSQL and/or MS SQL Server
• knowledge of Kong API Gateway
• additional Azure or AWS cloud expertise

Responsibilities

• install, configure, and administer applications in production and non-production environments
• monitor application availability, performance, and capacity
• support incident, problem, change, and release management activities
• administer Elasticsearch environments and container platforms
• automate operational and administration tasks
• create and maintain technical documentation, procedures, and knowledge articles
• contribute to service improvement and operational excellence initiatives