Senior QA Engineer
Job Description
Senior QA Engineer
Location: Belfast / Hybrid
Type: Permanent
MCS Group is working with a rapidly growing technology business as they look to appoint a Senior QA Engineer into a highly technical engineering team. This is an excellent opportunity for an experienced QA Engineer who enjoys working beyond traditional UI testing and wants to take ownership of quality across complex, modern software systems.
You will work closely with Software Engineers, Product and wider technical teams, helping shape the overall approach to quality while remaining hands-on with automation, API testing, performance testing and the validation of complex back end systems.
The Role
As Senior QA Engineer, you will play a key role in improving quality across a major software programme, helping establish scalable testing practices as the engineering team continues to grow.
Responsibilities will include
- Designing, building and maintaining automated testing frameworks.
- Developing automated tests across APIs, services and user-facing applications.
- Testing complex back end and data-intensive systems.
- Validating data, numerical outputs and system behaviour rather than focusing solely on functional UI testing.
- Building automated testing into CI/CD pipelines.
- Carrying out performance, load and reliability testing.
- Working with engineering teams to identify risks earlier in the development lifecycle.
- Improving test coverage, tooling and overall QA processes.
- Investigating complex defects across distributed systems.
- Helping define quality standards and release criteria.
- Supporting and mentoring other engineers around testing and quality best practice.
What We're Looking For
We are particularly interested in Test Engineers with strong technical automation experience who are comfortable working closely with software engineering teams. Ideally you will have experience across several of the following:
Strong test automation experience using a modern programming language (Python preferred).
API and backend/service-level testing.
Performance and load testing using tools such as k6, JMeter, Locust or similar.
Testing data-intensive, streaming or distributed systems.
Validating numerical, analytical or data-driven outputs.
CI/CD pipelines and automated quality gates.
Linux environments.
Docker and Kubernetes.
Cloud-native applications.
SQL and database testing.
Modern web automation frameworks such as Playwright, Cypress or Selenium.
Salary
Up to £80,000 plus benefits.
Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current and exclusive roles www.mcsgroup.jobs
All conversations will be treated in the strictest of confidence.
ApplyWave is not an employer or a recruitment agency. You apply to each employer directly — we find their contact and write your letter. Real employers never charge money for a job or a visa sponsorship.
More from MCS Group | Your Specialist Recruitment Consultancy
Visa Sponsorship Data
AI Resume Tailoring
Example
Tailor your resume for Senior QA Engineer roles
- Scores your fit against the posting's own requirements
- Pulls the skills and keywords it names into your bullets
- Exports as PDF or Word, ready to submit
Reach hiring managers at MCS Group | Your Specialist Recruitment Consultancy
AI Cover Letters for Senior QA Engineer
Generate tailored cover letters, recruiter emails, and LinkedIn messages matched to your resume.
- Tailored to your resume & job
- Cover letters, emails, LinkedIn messages
- Professional tone, your experience