QA Performance Engineer

October 18, 2026

Senior

Barcelona, Spain

Description

Joppy's partner company is hiring a Performance Engineer to drive web application performance through systematic testing and optimization. The role covers performance, load and stress testing, frontend analysis, production monitoring and integration of performance testing into CI/CD. The position targets a Mid-Senior specialist with 10+ years of performance testing experience, ideally in banking or financial services.

Responsibilities

Conduct regular performance, load, and stress tests on web applications to ensure compliance with defined SLAs
Analyze frontend performance using modern tools such as Lighthouse, WebPageTest, Dynatrace, and browser developer tools
Identify performance bottlenecks across frontend, APIs, and infrastructure; recommend and implement improvements
Collaborate with developers, testers, architects, and business stakeholders to integrate performance testing into CI/CD pipelines
Document test strategies, scenarios, and results with clear, tailored reporting for technical and non-technical audiences
Champion a performance-first culture by coaching teams and embedding performance testing early in development lifecycles
Monitor production environments using real-user monitoring (RUM) and synthetic testing solutions
Proactively identify risks and potential degradations in application performance
Support troubleshooting of performance-related incidents across multiple system layers

Requirements

Bachelor’s degree in Computer Science, Information Technology, or a related field
+10 years of experience in performance testing, ideally in banking or financial services
Strong knowledge of performance testing tools such as JMeter, Gatling, LoadRunner, k6
Experience with frontend monitoring frameworks and developer tools
Proficiency in scripting and test automation with JavaScript, Python, or similar languages
Familiarity with CI/CD environments such as Jenkins, GitLab CI, or Azure DevOps
Solid understanding of web technologies including HTML, CSS, JavaScript, React/Angular
Knowledge of performance optimization techniques like lazy loading, caching, CDN and minification
Understanding of backend/API dependencies and their impact on frontend performance
Familiarity with cloud and containerized environments such as Docker, Kubernetes
Excellent communication and reporting skills with technical and business stakeholders
Strong problem-solving skills, able to work independently and collaboratively in an international context
Experience in the banking sector or secure, regulated environments
Exposure to synthetic monitoring and observability solutions such as New Relic, AppDynamics, Elastic APM
Knowledge of accessibility, security, and compliance standards for frontend applications

Conditions

Full-time

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