Mateo
Full Stack Developer
ReactNode.jsPythonTypeScriptNext.jsMongoDBAWSAIAPIs
Shakers for companies
Work with a senior QA Tester and QA Engineer
A certified QA Tester who answers for product quality: what gets tested, against which criteria and which defect slips through before release. Test plan, test cases and the regression back under control.
Senior tech talent for your software quality, starting within days and on the stack that already runs in production.
- Certified talent in AI and agent skills
- Meet up to 3 AI Builders in 72 h
- Flexible collaboration models
+600
European clients across different industries
Top 4%
We work with the top 4% of certified talent in our community
72 hours
Meet 3 certified candidates in under 72 h
4.7/5
Our clients' satisfaction on Trustpilot
The talent mix your company needs
At Shakers you will find AI Engineers, QA Engineer and specialists across Tech, Product and Data
Ana
DevOps Engineer
DockerCI/CDAWSAzureKubernetesTerraformAmazon Bedrock
Lucas
Backend Developer
Node.jsPythonJavaGoPHPMySQLMongoDBDocker
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Emma
Security Engineer
Burp SuiteOWASP ZAPMetasploitNmapNessusTrivySnyk
QA Engineer: what this role brings to your project
A QA Engineer answers for product quality: they decide what gets tested and against which criteria, turn requirements into test cases and chase every defect to its cause, manual or automated. Their boundary lives in the question they answer: the QA judges what deserves a test and evaluates the result; the Test Automation Engineer builds the framework that runs those tests hands-free.
Quality criteria versus test infrastructure: two crafts that meet at automated regression.
SeleniumPlaywrightCypressPythonJavaScriptTypeScriptJavaSQLPostmanPytestAPI testingJiraCI/CDAppiumGitAgile/Scrum
One provider. One contract. Full traceability
How Shakers works for your company
Post your project
Tell us about the project, its scope, the expertise you need and when you want to get to work.
You get three options
We match your brief against certified talent and introduce the three AI Builders who fit best.
The last word is yours
Meet the three specialists and choose who you collaborate with; we handle the rest.
Why work with Shakers
The advantages of adding this profile with Shakers
Defects that never reach production
A test plan over what is critical and automatic regression: the defect appears in the test environment, not in production.
Quality criteria from design
QA joins refinement and turns requirements into acceptance criteria: preventing costs less than hunting defects in production.
Automated regression in the pipeline
The regression runs in the pipeline with Playwright, Cypress or Selenium per your stack: releasing stops being a blind bet.
API and data under test
Postman for the contract of your APIs and SQL to validate every write: quality is also checked below the interface.
The defect documented, not shouted
Every finding lands in Jira with steps, severity and evidence: whoever fixes it gets it ready to work on, without back and forth.
Quality without growing headcount
QA by project, no hiring process: certified talent that joins on top of your product and your pipeline from week one.
What is the difference between QA and tester?
In Spain they are two spellings of the same craft, and job ads use them as synonyms. QA Tester leans towards whoever executes test cases; QA Engineer towards the role with criteria and automation.
What stack does a QA Engineer in Spain master?
The one real job ads ask for: Playwright (279), Cypress (248) and Selenium (194) for regression; Python or Java as language, Postman and SQL for API and data, and Jira as the lingua franca of defects.
Does a manual QA work if my project needs automation?
Pure manual almost never interviews anymore: the market asks for criteria plus automation. A senior QA combines both, deciding what to test by hand and automating the regression every release.
How does QA work with my team without slowing releases?
By joining the flow, not the end of it: refining stories, turning them into acceptance criteria and leaving the regression running in the pipeline. Quality stops being the queue before deployment.
How much does it cost to work with a QA Tester by project?
Scope sets it: what gets tested, which part of the regression gets automated and for how many sprints. At Shakers the budget closes per project before kickoff.
What does a QA deliver in the first weeks of a project?
The inventory of what ships without a net, the test plan for what is critical and the first automatic regression suite. From then on, every release carries its net up.
What gets delivered in the first weeks
The inventory of what ships without a net, the test plan for the critical and a first regression in the pipeline: manual runs alone.
A market that asks for the role by name
493 active tech job ads in Spain mention quality assurance and 207 ask for a QA Engineer, per Shakers market analysis (n=31,162, September 2026). The stack has turned: Playwright in 279, Cypress in 248 and Selenium in 194. Asking for QA without saying what you expect from automation narrows nothing.
Where the QA ends
They find the defect and document it; its author fixes it. If the brief is the framework that runs the tests hands-free, it belongs to the Test Automation Engineer; the criteria stay with QA.
Quality by project, not a vacancy
The brief arrives with the symptom: a repeating bug, a release on hold or a regression nobody touches. Scope closes before kickoff.
Connect with AI specialists to build your next project
Find specialists in Tech, Product, Data to complement your team
Test Automation Engineer
Builds the framework that runs the tests hands-free: when the brief is the automation infrastructure and not the criteria, the project is theirs.
Backend Developer
Fixes what QA finds: the defect documented with steps and severity lands in their queue. Quality and backend close the cycle of every defect together.
DevOps Engineer
Sustains the pipeline where your regression runs: continuous quality in CI/CD. When the brake is in the deployment and not in the tests, the brief starts there.
Full Stack Developer
Writes what QA puts to the test and signs the acceptance criteria with them: in small teams they share the same regression net before releasing.
The AI talent you need Certified by Shakers
We introduce you to three ready_to_build AI Builders in 72 hours.
