Senior Performance-Resilience Test Engineer

ARHS Group; Zaventem; Sur place; EUR 70 000 - 95 000; Plein temps

Résumé du poste

ARHS Group is seeking an experienced Performance/Resilience Test Engineer to join a major European Agency project. You will design, execute, and analyze non-functional testing to ensure performance, capacity, scalability, and reliability in cloud-native, distributed environments.

You will collaborate with architects, developers, QA, DevOps, and stakeholders to identify bottlenecks, propose improvements, and implement testing standards and best practices across the project lifecycle.

Qualifications

• Minimum 6 years of professional experience in non-functional testing and performance engineering.
• Proven experience designing and executing performance, scalability, and resilience testing activities.
• Experience working within Agile software development and testing environments.

Responsabilités

• Create and maintain non-functional test plans and validate them with project leaders.
• Define and implement end-to-end non-functional testing strategies.
• Plan, prepare, execute, and analyze non-functional testing throughout the software lifecycle.
• Design, develop, and maintain performance test scripts using JMeter or Gatling.
• Prepare, manage, and maintain performance test environments and data.
• Execute and monitor Load, Stress, Endurance, Capacity, Resilience, and Recovery tests.
• Analyze resource utilization and identify bottlenecks; provide root-cause analysis.

Connaissances

Performance testing

Chaos engineering

Java (test)

CI/CD

Stakeholder comms

Outils

JMeter

Gatling

Chaos/Kraken

Kubernetes

Locust

Description du poste

Arηs Group, Part of Accenture, specializes in the management of complex public sector IT projects, including systems integration, informatics and analytics, solution implementation and program management.

Our team helps lead clients through digital and information systems design, bringing expertise in a variety of areas ranging from software development, data science and security management to machine learning, cloud, and mobile development.

About the Job

We are looking for an experienced Performance/Resilience Test Engineer to join a major European Agency project and support the delivery of highly scalable, reliable, and resilient digital solutions. In this role, you will be responsible for designing, executing, and analyzing non-functional testing activities to ensure applications meet performance, capacity, scalability, and reliability requirements.

You will work closely with architects, developers, QA engineers, DevOps teams, and project stakeholders to identify performance bottlenecks, assess system resilience, and provide recommendations for continuous improvement in complex cloud-native and distributed environments.

Responsibilities

• Create and maintain non-functional test plans and contribute to their review and validation with project leaders and managers.
• Define and implement end-to-end non-functional testing strategies aligned with project objectives and technical requirements.
• Plan, prepare, execute, and analyze non-functional testing activities throughout the software development lifecycle.
• Design, develop, and maintain performance testing scripts using tools such as JMeter or Gatling.
• Prepare, manage, and maintain performance test environments and test data.
• Execute and monitor a variety of non-functional tests, including:
• Load Testing
• Stress Testing
• Endurance Testing
• Capacity Testing
• Resilience Testing
• Recovery Testing
• Analyze application and infrastructure resource utilization, identify performance bottlenecks, and investigate root causes of degradation.
• Review test results and provide recommendations to improve application performance, scalability, reliability, and stability.
• Support development and QA teams in executing non-functional testing activities.
• Contribute to the definition of standards, methodologies, and best practices for performance and resilience testing.
• Collaborate with DevOps and infrastructure teams to validate system behavior in cloud-native and microservices-based architectures.
• Provide regular reports, findings, and recommendations to technical and non-technical stakeholders.
• Support continuous improvement initiatives related to testing processes, tools, and automation frameworks.

Required Qualifications

Experience

• Minimum 6 years of professional experience in non-functional testing and performance engineering.
• Proven experience designing and executing performance, scalability, and resilience testing activities.
• Experience working within Agile software development and testing environments.
• Experience working on complex enterprise solutions with multiple integrated systems.
• Experience working in international and multicultural environments.
• Experience supporting cloud-based and distributed application architectures.

Technical Skills

• Strong hands-on experience with performance testing tools such as JMeter and/or Gatling.
• Test Planning
• Test Case Design
• Test Environment Setup
• Test Data Preparation
• Experience performing and analyzing load, stress, endurance, capacity, recovery, and resilience testing.
• Experience with Chaos Engineering and resilience testing tools such as Chaos/Kraken or similar solutions.
• Hands-on experience with Java from a test automation perspective.
• Strong understanding of performance indicators, application monitoring, and resource utilization analysis.
• Experience working with microservices-based architectures and private cloud environments.
• Familiarity with observability, monitoring, and performance analysis tools.
• Understanding of modern software development methodologies and CI/CD practices.
• Strong documentation, reporting, and technical writing skills.
• Ability to communicate findings, recommendations, and risks to both technical and business stakeholders.

Soft Skills

• Excellent analytical and problem-solving skills.
• Strong communication and presentation abilities.
• Ability to work independently and proactively.
• Strong stakeholder management and collaboration skills.
• Ability to work effectively within multidisciplinary and international teams.
• Commitment to quality, continuous improvement, and delivery excellence.

Nice-to-Have Skills

• Experience with Kubernetes, containers, and cloud-native environments.
• Knowledge of DevOps and Site Reliability Engineering (SRE) practices.
• Experience working with European Institutions, EU Agencies, or international organizations.
• ISTQB Performance Testing certification or equivalent.
• Experience with additional performance testing tools such as k6, LoadRunner, or Locust.

Languages

• English (minimum B2/C1 level, both written and spoken).

Eligibility Requirement

Due to the nature of the project and client security requirements, only candidates holding citizenship of a European Union Member State (EU Passport holders) can be considered for this role.

What the Client Offers

• Opportunity to work on high-impact projects within a European Agency.
• International and multicultural working environment.
• Exposure to large-scale digital transformation and cloud modernization initiatives.
• Collaboration with highly skilled technical experts and senior stakeholders.
• Long-term project stability and continuous professional development opportunities.
• Access to cutting-edge technologies, modern testing approaches, and innovative architectures.