Senior Test Automation Engineer

Expleo Group

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

Posted 9/29/2026contractLondon • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in test automation engineering, particularly with C# and BDD methodologies, while effectively integrating automated tests into CI/CD pipelines. Proficient in analyzing complex data structures and collaborating within Agile environments to drive continuous improvement in testing processes.

Highest-signal resume keywords

C# Test Automation DevelopmentBDD Frameworks and Behaviour-Driven Test SuitesCI/CD Pipeline IntegrationSQL Skills for Complex Data ValidationExperience in Regulated Enterprise Environments

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NETSQLJSONXMLMicrosoft PlaywrightPostmanAzure DevOpsApache KafkaELK Stack

Soft Skills

Analytical Problem-SolvingStakeholder CommunicationCollaboration

Tools & Technologies

Reqnroll / SpecFlowWireMockNewmanVisual StudioGitAzure DevOps RepositoriesAzure DevOps YAML PipelinesOpenTelemetryClickHouseClickStack / HyperDX

Industry Keywords

EnergyUtilitiesTradingRegulated Enterprise EnvironmentsEvent-Driven SystemsMicroservices Architectures

Tech Stack

Tools & technologies

ApacheASP.NETAzureElasticSearchKafkaLogstashMicroservicesMS SQL ServerRabbitMQSQLTFS.NET

About the role

Key responsibilities & impact

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 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 for quality, security and development standards
Collaborate 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

Requirements

What you’ll need

English essential
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
C#
.NET
ASP.NET Core
SQL
JSON
XML
Reqnroll / SpecFlow
Microsoft Playwright
WireMock
Postman
Newman
Bruno CLI
Visual Studio
Git
Azure DevOps Repositories
Azure DevOps YAML Pipelines
Apache Kafka (Aiven)
Schema Registry
Avro
JSON Messaging
RabbitMQ
Microsoft SQL Server
OpenTelemetry
ClickStack / HyperDX
ClickHouse
ELK Stack (Elasticsearch, Logstash, Kibana)
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

Benefits

Comp & perks

Collaborative working environment
Opportunities to expand skills and take part in inspiring projects
Expleo Academy accredited training courses
Competitive company benefits
Inclusive and accessible recruitment process
Reasonable adjustments and support for disabled employees
Equal opportunities employment
Additional support and adjustments to help everyone thrive