System Engineer – Barcelona

About the Position

We are Enreach, a European leader in IP telephony and Unified Communications as a Service (UCaaS). Our team of specialists in development, cloud, and real-time communications creates collaborative solutions and convergent services for businesses, including Unified Communications, Contact Center, Virtual PBX, and much more.

We are looking for an enthusiastic, energetic, and self-motivated team player with solid infrastructure and automation experience to join our technical team as a System Engineer in Barcelona.

In this role, you will design, operate, and continuously improve the cloud and on-premise platform that underpins our products and internal services, ensuring it is secure, reliable, and easy to operate for colleagues and customers. You will use modern Infrastructure-as-Code practices to manage everything from compute and networking to monitoring and databases, helping us scale efficiently and safely.

This is a hands-on engineering role where you will combine deep systems knowledge (Linux, Windows, networking, databases) with tools like Terraform, Ansible, and AWS to build a robust platform, while maintaining the day-to-day disciplines of stability, predictability, and operational excellence.

Responsibilities

• Design, implement, and maintain infrastructure using Terraform and Ansible, ensuring environments are reproducible, secure, and well-documented.
• Operate and optimize our AWS workloads (networking, compute, storage, security groups, IAM) with a focus on reliability, cost efficiency, and scalability.
• Administer and harden Linux systems used for core application and platform workloads.
• Manage Windows servers primarily related to IIS web hosting and Active Directory, including configuration, patching, and troubleshooting.
• Configure and maintain secure network connectivity, including VPNs, firewalls, and VLANs, in close collaboration with network and security stakeholders.
• Install, configure, and operate MySQL databases, including backups, basic performance optimization, and integration with application services.
• Build and maintain observability for our platform using Grafana and Prometheus/Loki, ensuring we have the right dashboards, alerts, and metrics in place.
• If/when knowledge and experience allow, contribute to and maintain OpenStack, TeamCity build and deployment pipelines (where relevant) to support predictable and automated releases.
• Collaborate with development, support, and product teams to understand requirements, troubleshoot platform issues, and improve reliability and performance.
• Document infrastructure, configurations, and operational runbooks in a clear, concise, and maintainable way.
• Drive continuous improvement of our platform engineering practices, including security, automation, monitoring, and incident response.

Requirements

• A highly driven individual with strong analytical, structured, and problem-solving skills.
• Several years of hands-on experience (+5 years) in infrastructure/systems engineering, ideally in a cloud-centric or SaaS/telecom environment.
• Proven experience with Terraform and Ansible in production environments.
• Solid experience with AWS (or another major cloud provider) and an understanding of cloud-native architecture and security best practices.
• Strong Linux skills and good experience with Windows Server, especially IIS web hosting and Active Directory.
• Demonstrated network security experience: configuring and troubleshooting VPNs, firewalls, and VLANs.
• Practical experience managing MySQL in production (installation, configuration, backup/restore, basic performance tuning).
• Experience with Grafana and Prometheus/Loki or comparable monitoring/logging stacks.
• Experience with OpenStack, Freeswitch, RTPEngine, and/or Kamailio, or a strong interest in VoIP/SIP/telecom platforms will be considered a plus.
• English and Spanish proficiency, both spoken and written, at a professional level, enabling effective collaboration and clear documentation.

We Offer

• A stable project with a permanent contract and flexible compensation options, including meal vouchers, transportation, childcare, and private health insurance.
• Flexible working hours with a shorter workday on Fridays.
• We follow a hybrid organizational model that combines the work–life balance benefits of remote work with on-site collaboration in our Barcelona office (a minimum of 2 days per week), fostering team cohesion.
• A collaborative environment where we encourage autonomy and the ability to propose improvements that truly make a difference (Holacracy).
• Centrally located, modern, and bright offices. You can enjoy a spacious kitchen area, a relaxation zone, an arcade machine, and coffee, tea, and fruit available to you every day.

If all of this sounds interesting to you and you would like to be a new member of our family, do not hesitate to apply for the vacancy!

Are you ready to take on the challenge of create contact magic?

At Enreach, we are committed to promoting equality in the workplace. We strive to ensure equal opportunities and actively work to remove any barriers to professional growth and development.

It is important to us that everyone feels welcome and uniquely valued, which is why we focus on fostering a diverse and inclusive work environment.

We celebrate our diversity, as it drives creativity, entrepreneurship, and innovation ✨

About the Company

Enreach is a company that adds value to its customers and believes in the professional growth of people. We are the European market leader in IP telephony and Unified Communications as a Service (UCaaS). Thanks to our team of specialists in development, cloud, and real-time voice and video communications, we design and deliver a complete portfolio of collaborative technologies and convergent telecommunications services for businesses (Unified Communications, Contact Center Services, collaboration, Virtual PBX, SIP Trunking, etc.). We believe in collective leadership and build our project on foundations such as closeness, flexibility, respect, and innovation.