Senior Performance Engineer

Lgt Digital Factory; Barcelona; Presencial; EUR 55.000 - 85.000; Jornada completa

Descripción de la vacante

LGT Digital Factory in Barcelona is seeking a Performance Engineer to join the Windtunnel team. You will conduct performance, load and stress tests on web apps and analyze frontend performance using modern tools to identify bottlenecks across frontend, APIs and infrastructure.

Collaborate with developers, testers, architects and business stakeholders to integrate performance testing into CI/CD, document test strategies and results, and champion a performance-first culture.

Formación

• Bachelor's degree in Computer Science, Information Technology, or related field.
• 5+ years of experience in performance testing, ideally in banking or financial services.
• Strong knowledge of performance testing tools (e.g., JMeter, Gatling, LoadRunner, k6).
• Experience with frontend monitoring frameworks and developer tools.
• Proficiency in scripting and test automation (JavaScript, Python, or similar).
• Hands-on experience with CI/CD environments (Jenkins, GitLab CI, Azure DevOps).
• Web technologies (HTML, CSS, JavaScript, React/Angular).
• Performance optimization techniques (lazy loading, caching, CDN, minification).
• Backend/API dependencies and their impact on frontend performance.
• Cloud and containerized environments (Docker, Kubernetes).
• Synthetic monitoring and observability solutions (New Relic, AppDynamics, Elastic APM).
• Experience in banking sector or with secure, regulated environments is a plus.

Responsabilidades

• Regular performance, load, and stress tests on web applications to ensure SLAs.
• Analyze frontend performance using modern tools and browser dev tools.
• Identify performance bottlenecks across frontend, APIs, and infrastructure and recommend improvements.
• Own and lead the Windtunnel as a recurring engagement program.
• Collaborate with developers, testers, architects, and stakeholders to integrate performance testing into CI/CD.
• Document test strategies, scenarios and results with clear reporting for technical and non-technical audiences.
• Drive adoption of a performance-first culture by coaching teams and embedding testing early in development lifecycles.
• Monitor production environments using RUM and synthetic testing solutions.

Conocimientos

Performance testing

Analytical skills

Problem-solving

CI/CD understanding

Educación

Bachelor's degree in Computer Science

Herramientas

JMeter

Gatling

LoadRunner

k6

Jenkins

GitLab CI

Azure DevOps

Docker

Kubernetes

New Relic

AppDynamics

Elastic APM

React

Angular

Descripción del empleo

Descripción del trabajo

At LGT Digital Factory we are searching for Performance Engineer for our Barcelona Office.

WHAT CAN YOU EXPECT?

LGT is committed to developing and operating modern and cloud native applications with the primary goal of enhancing operational efficiency and creating great client experience.

LGT Digital Factory (DiF) acts as a strategic nearshore partner to implement state-of-the-art client and employee IT front ends. To fulfill this mission, we interact closely with LGT business and IT units and third-party vendors.

You can expect state-of-the-art development tools and best-in-class DevOps processes.

Together with a young, highly motivated team you will build and run the DiF Windtunnel for performance engineering.

YOUR CHALLENGE

Are you excited about joining our engineering team (we call it Windtunnel) that helps the bank to systematically test existing and new solutions? Do you have a natural curiosity to uncover bottlenecks and the technical skillset to resolve them? Are you motivated to take ownership and contribute to building high-performing frontend solutions in a banking environment?

We are looking for a Performance Engineer with focus on performance testing and optimization who combines technical expertise with strong analytical skills and a passion for problem-solving. In this role, you will:

Performance Testing & Optimization

• Regularly conduct performance, load, and stress tests on web applications to ensure compliance with defined SLAs.


• Analyze frontend performance using modern tools (e.g., Lighthouse, WebPageTest, Dynatrace) and browser developer tools.


• Identify performance bottlenecks across frontend, APIs, and infrastructure, and recommend improvements.

Collaboration & Quality Assurance

• Own and lead the Windtunnel as a recurring engagement program.


• Manage and prioritize the team's workload, incident support and ad hoc requests across teams.


• Work closely with developers, testers, architects, and business stakeholders to integrate performance testing into CI/CD pipelines.


• Document test strategies, scenarios, and results with clear reporting tailored to both technical and non-technical stakeholders.


• Drive adoption of a performance-first culture by coaching teams and embedding testing early in the development lifecycle.

Monitoring & Troubleshooting

• Monitor production environments using real-user monitoring (RUM) and synthetic testing solutions.


• Proactively identify risks and potential degradations in application performance.


• Lead the resolution of performance-related incidents across multiple system layers, coordinating cross-functional teams to drive timely fixes

YOUR PROFILE

To be successful in this role, you should have:

Education & Experience

• Bachelor’s degree in Computer Science, Information Technology, or a related field.


• 5+ years of experience in performance testing, ideally in banking or financial services.

Performance Engineering Expertise

• Strong knowledge of performance testing tools (e.g., JMeter, Gatling, LoadRunner, k6).


• Experience with frontend monitoring frameworks and developer tools.


• Proficiency in scripting and test automation (JavaScript, Python, or similar).


• Hands-on experience with CI/CD environments (Jenkins, GitLab CI, Azure DevOps).

Solid understanding of frontend-oriented development, including

• Web technologies (HTML, CSS, JavaScript, React/Angular).


• Performance optimization techniques (lazy loading, caching, CDN, minification).


• Backend/API dependencies and their impact on frontend performance.


• Cloud and containerized environments (Docker, Kubernetes).


• Synthetic monitoring and observability solutions (New Relic, AppDynamics, Elastic APM).

Nice-to-Have

• Experience in the banking sector or with secure, regulated environments.


• Knowledge of user experience design, accessibility, security, and compliance standards in frontend applications.

Communication & Stakeholder Management

• Excellent communication and reporting skills, with the ability to interact confidently with both technical and business teams.


• Strong problem-solving mindset, capable of working independently and collaboratively in an international setup.

About LGT Digital Factory

LGT Digital Factory was initiated as a project in 2022 to drive the digital transformation of LGT Private Bank by designing and managing innovative digital tools and seamless user experiences. Our mission is to simplify and enhance how clients interact with the bank in their day-to-day activities.

As a wholly owned subsidiary of LGT Private Bank Group, LGT Digital Factory (Spain) S.L. operates exclusively for the group’s companies. LGT Private Bank, headquartered in Liechtenstein, is the largest privately-owned international private banking institution, specializing in wealth management services for high-net-worth individuals, families, and institutional clients. Together, we form part of the LGT Group, a global leader in financial services. xqziphu

If you're looking to contribute to meaningful digital innovation within a respected and globally connected organization, LGT Digital Factory offers a unique opportunity to make an impact.