Senior Software Development Engineer In Test (sdet)

Watford, ENG, GB, United Kingdom

Job Description

Job Summary

We are looking for a highly experienced

Senior SDET Engineer

with a strong

Computer Science background

and deep expertise in

Selenium-based test automation

. The ideal candidate will be responsible for designing, developing, and maintaining scalable automated test frameworks, ensuring high product quality, and driving best practices in test automation across teams.

This is a

permanent role

suited for a technically strong individual who can work independently, mentor junior engineers, and collaborate closely with development, DevOps, and product teams.

Key Responsibilities

Design, develop, and maintain robust

test automation frameworks

using

Selenium

Build and execute automated test scripts for

UI, API, and integration testing

Review functional and technical requirements to ensure complete test coverage Identify, document, and track defects with clear reproduction steps Integrate automated tests into

CI/CD pipelines

Perform code reviews for test automation code and ensure best practices Collaborate with developers to improve testability and quality of the codebase Analyze test results, identify root causes, and recommend corrective actions Mentor junior SDET / QA engineers and provide technical guidance Drive test automation strategy and continuous improvement initiatives
Required Skills & QualificationsTechnical Skills

10+ years of experience in

Software Testing / SDET roles

Strong hands-on experience with

Selenium WebDriver

Proficiency in

Java

(preferred) or other automation languages (Python, C#) Strong understanding of

Object-Oriented Programming (OOP)

concepts Experience with

TestNG / JUnit / Cucumber (BDD)

Solid experience in

API automation

(RestAssured, Postman, or similar tools) Experience working with

CI/CD tools

(Jenkins, GitHub Actions, Azure DevOps, etc.) Hands-on experience with

Git

or other version control systems Good understanding of

SQL and databases

Experience testing

web-based and enterprise applications


Testing Knowledge

Strong knowledge of

SDLC, STLC, and Agile/Scrum methodologies

Experience in

functional, regression, smoke, and performance testing

Ability to design

data-driven and keyword-driven

automation frameworks Understanding of

cross-browser and cross-platform testing


Preferred / Good-to-Have Skills

Experience with

Playwright or Cypress

Exposure to

cloud platforms

(AWS, Azure, or GCP) Experience with

Docker / Kubernetes

for test environments Knowledge of

performance testing tools

(JMeter, Gatling) Experience in

microservices architecture testing


Soft Skills

Excellent problem-solving and analytical skills Strong communication and documentation skills Ability to work independently and lead testing initiatives Mentoring and leadership capabilities Strong attention to detail and quality mindset
What We Offer

Permanent, long-term employment Competitive salary and benefits package Opportunity to work on complex and scalable systems Collaborative and growth-oriented work environment Career growth and leadership opportunities
Job Type: Full-time

Pay: 40,000.00-51,000.00 per year

Work Location: In person

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Job Detail

  • Job Id
    JD4407929
  • Industry
    Not mentioned
  • Total Positions
    1
  • Job Type:
    Full Time
  • Salary:
    Not mentioned
  • Employment Status
    Full Time
  • Job Location
    Watford, ENG, GB, United Kingdom
  • Education
    Not mentioned