Virtualization Engineer

Oficina Plaza España

Full-time

Permanent employee

About this role

The challenge

We're at a pivotal stage in the evolution of our cloud platform. To continue scaling efficiently and strengthening reliability, we are evolving our virtualization platform within our IaaS environment. Our infrastructure supports mission-critical services, where performance, stability and continuous improvement are key.

As a Virtualization Engineer, your mission will be to design, deploy, operate and evolve virtualization infrastructures based on KVM in production environments. You will contribute directly to the evolution of the virtualization layer, participate in architecture decisions, and help improve infrastructure-related products.

You will play a key role in resolving critical incidents, analyzing high-impact escalations from the operations team, and optimizing performance, stability and efficiency of the platform. You will also contribute to reducing operational friction through automation and continuous improvement.

You'll be part of a highly collaborative engineering environment, working closely with Network, Systems, Storage and Operations teams to solve cross-functional issues and ensure the platform evolves in a scalable and reliable way.

Collaboration will be essential. You will support infrastructure decisions, participate in architecture changes, migrations and capacity expansions, proactively identify improvements, and ensure the platform continues to evolve with a strong technical foundation.

Requirements that are important for us

Experience in administration and support of virtualization environments based on KVM in production.
Proven experience in implementation, operation and troubleshooting of virtualization platforms.
Advanced knowledge of Linux system administration.
Strong understanding of KVM virtualization stack, including QEMU and libvirt.
Experience diagnosing complex issues related to performance, capacity, availability and stability.
Practical knowledge of networking in virtualized environments: bonding (link aggregation), VLANs or VXLANs, firewall rules (iptables).

Key skills and expected impact

Strong documentation practices and contribution to technical procedures and operational best practices.
Optimization of performance, stability and efficiency of the virtualization platform.
Ability to lead root cause analysis and propose technical improvements to reduce incident recurrence.
Resolution of complex and critical incidents escalated by the operations team.
Contribution to automation to reduce manual and repetitive operational tasks.
Technical judgment in validating new solutions, designs and changes impacting the virtualization layer.
Acting as a technical reference, contributing to raising the overall technical level with practical knowledge and global vision.

Nice to have

Experience with infrastructure orchestration platforms such as OpenStack, CloudStack or similar.
Experience in cloud providers, IaaS platforms or large-scale infrastructure environments.
Knowledge of centralized storage (NFS, iSCSI) and distributed storage (Ceph).
Experience in high availability, capacity planning and resource optimization.
Familiarity with observability, monitoring and performance analysis tools.
Experience with automation tools such as Ansible.
Participation in architecture evolution, standardization or platform improvement projects.
Ability to document technical decisions and communicate clearly in multidisciplinary environments.

Tools

Virtualization: KVM, QEMU, libvirt
Networking: bonding, VLANs, VXLANs, iptables
Storage: NFS, iSCSI, Ceph
Orchestration: OpenStack, CloudStack or similar
Automation: Ansible or similar
Observability & performance: monitoring and performance analysis tools
Collaboration & documentation: technical procedures and operational documentation

About us

Plenit (formerly Jotelulu) is the Operating Platform for IT Service Providers. We help any type of IT company run, scale, and grow their business on top of our own sovereign infrastructure, with a footprint across Europe and the Americas.

Our ambition is to become the platform where IT companies can run their entire business. From technology and operations to go-to-market, Plenit covers the end-to-end needs of an IT partner across the services they deliver to their customers. Powered by agentic AI, the platform connects, automates, and orchestrates these capabilities in a way that traditional Cloud, Marketplace, or IT management platforms do not.

Five years in, we are across four countries and growing fast. We are building something ambitious, but we want to do it in a simple, pragmatic way, staying close to our partners and obsessed with their success. That is exactly why we are bringing this role on now.

What Plenit offers

At Plenit, we offer a place where you can do great work, keep growing, contribute to something meaningful, and be part of shaping the project. We trust our people, give them the space to take ownership, and believe that working as one team and creating a great working environment make all the difference.

Here’s what you can expect when you join us:

Flexibility that works
We believe people do their best when work can adapt to their lives. That’s why we offer flexible working hours and different ways of working, including remote and hybrid options depending on your role and team.

More moments to enjoy
Some days are simply meant to be enjoyed. In addition to your annual leave, we offer extra company days off throughout the year, giving you more time to rest, recharge, and make the most of those moments.

Your health, covered
Taking care of our people is part of how we do things. That’s why Plenit provides private health insurance, fully paid for by the company.

Keep growing
We want Plenit to be a place where you can keep learning, take on new challenges, and continue growing professionally. You’ll have opportunities to develop within the company and keep building on your skills and experience.

You’ll also receive an annual learning budget that you can use for training, courses, certifications, and other resources that support your professional development.

A great place to connect
Our Madrid office is located in the heart of the city and offers a welcoming, collaborative, and energetic environment where you can work, share, and spend time with the team. You’ll also find great coffee and fresh fruit.

A culture built on trust
We believe in doing things well, taking ownership, supporting one another, and enjoying what we build. We value open and honest communication, different perspectives, and working together to keep moving forward. Our culture isn’t just something we talk about; you’ll experience it every day in how we collaborate, contribute, and make things happen.