Senior Test Automation Engineer

Overview

Expleo is seeking an experienced Senior Test Automation Engineer to join our Digital Assurance practice, supporting a key client within the energy trading sector. This role will be responsible for defining and implementing robust test automation solutions, ensuring the quality, reliability and performance of business-critical applications and data platforms.

The successful candidate will combine strong automation engineering capabilities with excellent analytical skills to deliver high-quality testing solutions across complex systems, data integrations and event-driven architectures.

Responsibilities

• Define test strategies, coverage models and acceptance criteria from functional and non-functional requirements.




• Design, develop and maintain automated test frameworks and regression test suites.




• Develop test automation solutions using C# and BDD methodologies.




• Create and maintain robust Gherkin scenarios and step definitions.




• Determine the optimal balance between manual and automated testing, typically operating within a 70:30 automation-to-manual testing approach.




• Integrate automated tests into CI/CD pipelines and development workflows.




• Perform testing of large datasets, data flows and data mappings.




• Execute test cases, analyse results and clearly communicate defects, issues and risks.




• Utilise approved AI-assisted tools to support test design, exploratory testing, automation development, analysis and reporting.




• Critically review and validate AI-generated outputs to ensure adherence to quality, security and development standards.




• Collaborate closely with developers, analysts and business stakeholders within Agile delivery teams.




• Drive continuous improvement initiatives while adhering to the client's development lifecycle and quality standards.

Essential skills

Programming & Platforms

• C#




• .NET




• ASP.NET Core




• SQL




• JSON




• XML

Testing & Automation

• Reqnroll / SpecFlow




• Microsoft Playwright




• WireMock




• Postman




• Newman




• Bruno CLI

Development & Delivery

• Visual Studio




• Git




• Azure DevOps Repositories




• Azure DevOps YAML Pipelines

Event Streaming & Messaging

• Apache Kafka (Aiven)




• Schema Registry




• Avro




• JSON Messaging




• RabbitMQ

Data & Observability

• Microsoft SQL Server




• OpenTelemetry




• ClickStack / HyperDX




• ClickHouse




• ELK Stack (Elasticsearch, Logstash, Kibana)

Desired skills

• Excellent analytical and problem-solving capabilities.




• Strong stakeholder communication and collaboration skills.




• Familiarity with Azure DevOps, TFS, Jira or similar Application Lifecycle Management tools.




• Exposure to observability and monitoring platforms.




• Knowledge of event-driven and microservices architectures.

Experience

• Proven experience in test automation engineering within Agile environments.




• Strong experience in C# test automation development.




• Experience creating and maintaining BDD frameworks and behaviour-driven test suites.




• Demonstrable experience building automated regression test packs and integrating them into CI/CD pipelines.




• Strong SQL skills with experience validating complex data structures and integrations.




• Experience testing APIs, event-driven systems and distributed architectures.




• Experience using AI-assisted engineering and testing tools.




• Experience within energy, utilities or trading environments.




• Experience working within regulated enterprise environments.

Benefits

• Collaborative working environment – we stand shoulder to shoulder with our clients and ourpeers through good times and challenges




• We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects




• ExpleoAcademy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses




• Competitive company benefits




• Always working as one team, our people are not afraid to think big and challenge the status quo

• As a Disability Confident Committed Employer we have committed to:
  
  
  
  • Ensure our recruitment process is inclusive and accessible

  
  

  • Communicating and promoting vacancies

  
  

  • Offering an interview to disabled people who meet the minimum criteria for the job

  
  

  • Anticipating and providing reasonable adjustments as required

  
  

  • Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people

  
  

  
  

“We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age”.

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive

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