Expert Test Engineer

keystone-solutions; Brussel; On-site; EUR 65,000 - 90,000; Full time

Job summary

Keystone Solutions seeks an expert Test Engineer to join a consultancy mission at a client site as part of a modernization program for the eDossier system. The role covers cloud, APIs, zero trust, and microservices with emphasis on automated testing and rapid feedback in DevOps processes.

You will develop and execute functional, API, UI, and integration tests, validate contracts, ensure data integrity, and support end-to-end user flows across environments.

Qualifications

• Master's degree in Computer Science or equivalent.
• 5 years experience in test automation.
• 5 years experience in monitoring and observability (Grafana).
• 5 years experience in API testing with OpenAPI.
• 5 years experience in UI testing with Cypress.
• 5 years experience in regression and integration testing (JUnit and Cucumber).
• 5 years experience in performance, stress and load testing (JMeter and Gatling).
• 5 years experience in CI/CD pipelines (Azure DevOps).
• 5 years experience in contract testing, mocking and service virtualization.
• 3 years experience with SQL databases.
• 5 years experience in agile delivery teams.
• 5 years experience with Java SE10+.
• 5 years experience with Python and JavaScript.
• 5 years experience with test automation.
• 5 years experience with UI test frameworks/tools.

Responsibilities

Skills

SQL databases

Agile delivery teams

API test frameworks

Build tools

Contract testing

E2E testing

CI/CD

Java SE10+

Monitoring & observability

Performance testing

Python

JavaScript

Regression testing

Test automation

UI testing

Education

Master's degree in Computer Science

Job description

Mission Overview

Keystone Solutions is seeking an expert Test Engineer for a consultancy mission at a client site. The client is a federal independent administration focused on providing protection to individuals at risk of persecution or serious harm upon return to their country of origin. This role is part of a modernization program aimed at enhancing their eDossier system.

Key Responsibilities

• Develop and implement a test strategy considering the eDossier context (cloud, APIs, zero trust, microservices, etc.).
• Create an agile operational test plan (business and technical) and implement it as automated as possible.
• Conduct functional testing, validating business logic in microservices and APIs, ensuring data integrity and E2E testing of user flows.
• Perform API testing, validating API contracts (openAPI) and testing for functionality, performance, security, and compatibility.
• Execute integration testing, simulating error scenarios to test system durability.
• Conduct security testing focusing on authentication, authorization, and encryption.
• Carry out performance and scalability testing of microservices and APIs.
• Develop and maintain automated test suites in CI/CD pipelines for rapid feedback in DevOps processes.
• Set up monitoring and logging for the solution across environments (dev, test, acc).

Requirements

• Master's degree in Computer Science or equivalent.
• Continuous self-education on sustainable trends and innovations, focusing on cloud-native engineering, development, and testing.
• Hands-on experience in monitoring and observability of software solutions, preferably GRAFANA (5 years).
• Hands-on experience in test automation implementation (5 years).
• Programming experience with Java SE10+ (3 years).
• Experience with scripting languages (Python, JavaScript) (5 years).
• Experience in setting up and executing API test frameworks and tools, preferably BRUNO (5 years).
• Experience in setting up and executing UI test frameworks and tools, preferably CYPRESS (5 years).
• Experience in regression and integration testing, preferably JUNIT and CUCUMBER (5 years).
• Experience in performance, stress, and load testing, preferably via JMETER and GATLING (5 years).
• Experience in E2E testing (5 years).
• Experience with build tools, preferably MAVEN (5 years).
• Experience in CI/CD pipeline implementation and integrating tests (preferably Azure DevOps) (5 years).
• Experience in contract testing, mocking, and service virtualization (5 years).
• Experience with SQL databases (3 years).
• Experience working within agile delivery teams (5 years).
• Ability to propose alternative solutions and recommendations considering the full context.
• Excellent communication skills with both technical and non-technical stakeholders.
• Experience in API design and development is a plus.
• Experience in microservices development and integration is a plus.
• Knowledge of event-driven architecture and systems is a plus.
• Familiarity with Domain Driven Design is a plus.

Language Requirements

Fluency in English and a good command of either Dutch or French is necessary due to the bilingual work environment.

Why Join Keystone Solutions

As a consultant at Keystone Solutions, you will engage in dynamic projects that offer diverse challenges across various client environments. You will benefit from turbo-charged learning opportunities and a commitment to your career growth. Being a 'K-Stone' means bringing our core values to every engagement, ensuring a collaborative and innovative work atmosphere.

Duration: 01/12/2026 - 30/11/2027 12 months (full time)

Skills required

• ervaring gebruik SQL databanken binnen testen - Level: Junior - Most recent: This year
• ervaring met (samen)werken binnen agile delivery teams - Level: Confirmed - Most recent: This year
• ervaring met API testframeworks en tools - Level: Confirmed - Most recent: This year
• ervaring met build tools - Level: Confirmed - Most recent: 1 to 3 years ago
• ervaring met contract testing, mocking en service virtualisatie - Level: Confirmed - Most recent: This year
• ervaring met E2E testen - Level: Confirmed - Most recent: This year
• ervaring met het integreren van tests in CI/CD pipelines - Level: Confirmed - Most recent: This year
• ervaring met java SE10+ - Level: Junior - Most recent: This year
• ervaring met monitoring en observability van software oplossingen - Level: Confirmed - Most recent: 1 to 3 years ago
• ervaring met performantie-, stress- en loadtesten - Level: Confirmed - Most recent: This year
• ervaring met python en javascript - Level: Confirmed - Most recent: 1 to 3 years ago
• ervaring met regressie en integratie testen - Level: Confirmed - Most recent: 1 to 3 years ago
• ervaring met test automatisering - Level: Confirmed - Most recent: This year
• ervaring met UI testframeworks en tools - Level: Confirmed - Most recent: This year

Language requirements

Dutch or French
Level Active knowledge
English
Level Active knowledge