Álvaro
Data Scientist
“In a climate this uncertain, Shakers gives you a layer of reassurance and confidence. What I like most, without a doubt, is the flexibility and getting to work on top-tier projects.”
Join ShakersShakers for expert talent
Build your career as a System Administrator
Engagements where maintenance is the brief: which servers hold, which backup restores and who gets into what. Companies that need what is installed to stay up, not a course to finish.
This is not another going-solo guide: it is what gets maintained on a real engagement, what you are asked to prove and where your territory ends.
El sysadmin español vive entre el empleo interno y el foro en inglés: la pregunta de si el freelance es viable lleva años abierta en hilos traducidos. La vía castellana de proyectos no existía.
Esto no es otra guía de salida: es qué se mantiene en un encargo real, qué se te pide demostrar y dónde acaba tu territorio.
- Higher-paying projects
- More continuity between projects
- Greater recognition for your experience
+3,000
Tech projects published on Shakers
+90
Tech, Product and Data specialisms are part of Shakers
6 months
Average length of a project with Shakers
4.7/5
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AI Builder careers powered by Shakers
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Amelia
AI Agent Developer
“I have been building AI agents for years. Thanks to Shakers I stopped chasing clients and started genuinely choosing which projects I wanted to work on. I work with some of the best companies in Europe, at my own rate, and I focus on what I am good at and what I love: building.”
Join Shakers
Luz
Backend Developer & Data Engineer
“Shakers adds a lot of value because it connects you with sharper projects, already filtered and better defined. It saves you a big part of the upfront work of understanding the client, quoting and weighing up whether it is worth it, and that means that as a contractor you can go far more directly to the opportunities that genuinely fit you.”
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Rubén
Software Developer
“Life as a contractor has a lot going on and it is not always easy. We like to focus on what we are good at, but you also have to manage clients, invoicing and go looking for work. For me, Shakers has been key because it does that prospecting for me, it gives the client confidence from the very first moment, and it lets us be part of a community with real enthusiasm.”
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Alejandro
AI Developer
“Shakers was key to getting my company off the ground: it gave me the flexibility to keep contracting while I built my next chapter. Without Shakers, I would have had to raise funding or push the project back.”
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Toño
Product Designer
“With Shakers I have landed recurring projects that give me peace of mind and room to grow professionally. It is not just about reaching quality clients: it is feeling that you have a network behind you, one that connects you with real opportunities and helps you move forward as a freelancer.”
Join ShakersLas decisiones que toma un Administrador de Sistemas cada semana
A system administrator (sysadmin) implements, configures, maintains, monitors and secures an organisation's computer systems: Windows and Linux servers, VMware, network, storage and identities, across on-prem and hybrid Microsoft 365 and Azure environments. As a freelancer, they hold that operation per engagement.
Their boundary: the systems technician is the support step, the engineer is the university variant, DevOps automates delivery. The administrator keeps what works running.
Decides si ese parche entra en la ventana de esta noche o espera, qué regla del FortiGate se abre y qué copia se restaura para probarla de verdad. Priorizas incidencias contra continuidad, revisas accesos de Active Directory y documentas lo que otro tendrá que administrar sin ti delante. El negocio es del negocio; que funcione, tuyo.
Pirate metricsAcquisitionActivationRetentionA/B experimentsWeb analyticsGA4Tag ManagerLooker StudioSQLPythonAutomationCRMLanding pagesTechnical SEOEmail marketingFunnelsDashboards
Windows ServerVMwareFortiGateActive DirectoryPowerShellBackup
Free to join, no hidden fees
How Shakers works for talent
Create your profile
Tell us who you are, what you can do, the projects you want to work on and what your availability and rate are.
Get your certification
We certify your experience and your use of AI so companies understand and trust what you bring.
Match with projects
We connect you with well-paid projects that fit your expertise and your preferences.
Projects that live up to your expectations
Work on real projects, with teams that need your expertise, without wasting time looking for opportunities.
Projects that fit you
Work with companies that need your stack and experience to take their projects to production.
Opportunities that come to you
Our AI matching connects your profile with the projects that fit your preferences.
You build. Shakers handles the rest
Set your own terms based on your seniority. We manage contracts, payments and paperwork.
Qué mantiene un Administrador de Sistemas en Shakers
El encargo llega con la operación
Servidores que corren, ventanas de mantenimiento y un dolor concreto: parches, copias, accesos o red.
Servidores y virtualización
Windows Server y Linux RHEL sobre VMware: parches en ventana, capacidad vigilada y máquinas que arrancan donde deben.
Red, perímetro y almacenamiento
Firewall FortiGate, reglas revisadas y storage con sus copias probadas: el tráfico justo y la copia que se restaura.
Identidades en híbrido
Active Directory sincronizado con Microsoft 365 y Azure: cuentas, permisos y grupos limpios a los dos lados.
Entornos contados, no cursos
Qué Windows y qué Linux administraste, qué VMware sostenías y qué restauración respaldaste. La práctica se demuestra con sistemas.
Hasta dónde llega tu encargo
Tuyo lo instalado y su continuidad; la entrega automatizada es de devops y el motor de datos, del DBA. Si el encargo cruza, entra su fila.
Frequently asked questions
Any other questions? Write to us and we will reply.
What does a System Administrator do on a real project?
They keep production up: they patch Windows and RHEL in window, watch VMware, review Active Directory access and test the backups. One week the silent migration, another the night incident.
Am I still a sysadmin if I already touch Azure or AWS?
Yes: the craft evolves to hybrid without changing its name. Administering identities half in the cloud is still administering, automating delivery is the neighbouring row.
How much should I charge as a freelance sysadmin?
The mechanism marks it: environment, criticality, on-call duty and whether you bill by days or retainer. You bill per engagement and the scope closes the band.
How do I move from employment to per-project work?
With environments told: what you administered, with which stack and which incidents you closed. Certification backs the practice and the first engagement arrives with scope defined.
Administrator, engineer or sysadmin: what do I call myself?
System administrator is the local name of the craft, sysadmin the alias sharing its article. Engineer is the university variant. In your profile, the environments you ran decide.
How do I join Shakers as a System Administrator?
You create your profile, pass the certification process and enter the collective: only 4 percent make it. Then you choose which operations you maintain.
The day to day of the craft
The patch that lands in its window, the backup that gets restored to prove it exists, the access reviewed when someone changes seats. And the invisible part: the documentation that lets someone else carry on.
Sysadmin: the same craft, another name
Wikipedia fuses sysadmin and system administrator into one article. The market adds spellings, systems and networks, server administrator, and job posts lean towards cloud. The name ages, the practice does not.
From internal employment to engagements
The conversation about going it alone lives in forums. The project path, with scope and a counterpart on the other side, is the one this page opens.
Hybrid cloud is already part of the craft
Job posts already mix AWS and JBoss with Windows and VMware: you administer identities that live half in Azure. The jump does not take your name away, it widens the territory.
Who you share the funnel with
El mantenimiento no viaja solo: quien automatiza la entrega, quien construye en cada nube y quien cuida el motor de datos cruzan tu encargo.
Azure Developer
The cloud of your hybrid: when the engagement moves from synchronising identities to building inside Azure, their row takes over.
AWS DevOps Engineer
Operations on AWS: deployment and automation on Amazon's cloud, the territory where the craft turns into continuous delivery.
Google Cloud Engineer
The third cloud: when the company spreads load across GCP, their row runs what runs there. Real hybrid is already multicloud.
Database Administrator
The data engine: SQL Server, PostgreSQL and query performance. You prepare the ground, the engine is theirs.
Data Analyst
The reading of what the systems say: logs, capacity and alerts turned into decisions.
Las fronteras entre estos roles se acuerdan en cada proyecto: no las fija el título.
Take the next step with Shakers
Keep the systems that cannot stop?
Pass Shakers certification and choose which infrastructure you maintain.
