Manual Software Tester (ISTQB Certified)

Resillion; Glasgow; Hybrid; GBP 33,000 - 38,000; Full time

Job summary

Resillion is seeking a detail-oriented Manual Software Tester with ISTQB certification to ensure the quality of software solutions. The role is hybrid, based three days per week in North Lanarkshire, with a UK driving license required.

The candidate will create and execute test plans, perform diverse manual testing, and collaborate across teams to resolve defects. Applicants should have ISTQB Foundation Level or equivalent, strong documentation skills, and experience with Jira/Azure

Qualifications

• ISTQB CTFL certification or strong understanding of ISTQB testing principles.
• Experience in manual software testing and the software testing lifecycle (STLC).
• Understanding of SDLC and various software development methodologies.
• Knowledge of test design techniques including equivalence partitioning, boundary value analysis, decision table testing, and state transition testing.
• Experience writing and executing test cases, test scenarios, and test scripts.
• Familiarity with defect reporting, defect lifecycles, and root cause analysis.
• Experience using test management and defect tracking tools such as Jira, Azure DevOps, TestRail, or Zephyr.
• Strong analytical, problem solving, and attention to detail skills.
• Good written and verbal communication skills.
• Ability to work independently and within a multidisciplinary team.

Responsibilities

• Review and analyse requirements, specifications, and docs to identify test scenarios.
• Create, review, and execute test plans, cases, and scripts.
• Perform manual testing: functional, regression, smoke, sanity, integration, system, exploratory.
• Conduct positive and negative testing to identify defects.
• Document, prioritise, and track defects in defect management tools.
• Collaborate with developers, analysts, and product owners to resolve defects.
• Retest and regression testing after fixes and changes.
• Support UAT by preparing scenarios and validating processes.
• Maintain test documentation and defect reports.
• Ensure software meets requirements and acceptance criteria before release.
• Provide updates on progress, risks, and issues.
• Contribute to process improvements in QA practices.

Skills

ISTQB CTFL

Manual testing

STLC

SDLC

Test design techniques

Test cases

Defect reporting

Jira

Azure DevOps

TestRail

Zephyr

Analytical

Communication

Teamwork

Independent working

Tools

Jira

Azure DevOps

TestRail

Zephyr

Job description

About Resillion

Resillion is a global provider of digital assurance, cybersecurity, and testing services. We help organisations strengthen their security posture, protect critical assets, and deliver high-quality digital solutions. Our teams operate across multiple specialist disciplines, including Digital Forensics, Incident Response, SOC Operations, Quality & Compliance, and Technical Consultancy. We are committed to excellence, continuous improvement, and delivering trusted, customer-focused services that meet the highest professional and accreditation standards.

Brief Description

Resillion is a global provider of digital assurance, cybersecurity, and testing services. We help organisations strengthen their security posture, protect critical assets, and deliver high-quality digital solutions. Our teams operate across multiple specialist disciplines, including Digital Forensics, Incident Response, SOC Operations, Quality & Compliance, and Technical Consultancy. We are committed to excellence, continuous improvement, and delivering trusted, customer-focused services that meet the highest professional and accreditation standards.

Manual Software Tester (ISTQB Certified)

Hybrid – 3 days a week North Lanarkshire

Must hold UK Driving License

Salary: £33000 – £37500 plus benefits

• PLEASE NOTE – DUE TO BACKGROUND CHECKS, WE CAN ONLY ACCEPT APPLICANTS WHO HAVE AT LEAST 3 YEARS UK ADDRESS HISTORY.

Job Summary

We are seeking a detail-oriented Manual Software Tester with a strong understanding of software testing principles and methodologies. The successful candidate will be responsible for ensuring the quality, functionality, and reliability of software applications through manual testing. An ISTQB certification or knowledge of the ISTQB Foundation Level syllabus is desirable.

Key Responsibilities

• Review and analyse business requirements, functional specifications, and technical documentation to identify test scenarios.
• Create, review, and execute test plans, test cases, and test scripts based on business requirements.
• Perform manual testing, including functional, regression, smoke, sanity, integration, system, and exploratory testing.
• Conduct positive and negative testing to identify defects and verify expected system behaviour.
• Identify, document, prioritise, and track defects using defect management tools such as Jira, Azure DevOps, or similar platforms.
• Collaborate with developers, business analysts, product owners, and other stakeholders to clarify requirements and resolve defects.
• Perform retesting and regression testing following defect fixes and software changes.
• Participate in requirements reviews, sprint planning, daily stand-ups, and other Agile ceremonies where applicable.
• Support User Acceptance Testing (UAT) by preparing test scenarios, assisting users, and validating business processes.
• Maintain accurate test documentation, test execution results, and defect reports.
• Ensure software meets functional requirements, quality standards, and acceptance criteria before release.
• Provide regular updates on testing progress, risks, issues, and test completion status.
• Contribute to continuous improvement of testing processes and quality assurance practices.

Required Skills And Qualifications

• ISTQB Certified Tester Foundation Level (CTFL) certification, or a good understanding of ISTQB testing principles.
• Experience in manual software testing and the software testing life cycle (STLC).
• Understanding of the Software Development Life Cycle (SDLC) and different software development methodologies.
• Knowledge of test design techniques, including equivalence partitioning, boundary value analysis, decision table testing, and state transition testing.
• Experience writing and executing test cases, test scenarios, and test scripts.
• Familiarity with defect reporting, defect life cycle management, and root cause analysis.
• Experience using test management and defect tracking tools such as Jira, Azure DevOps, TestRail, or Zephyr.
• Strong analytical, problem-solving, and attention-to-detail skills.
• Good written and verbal communication skills.
• Ability to work independently and collaboratively within a multidisciplinary team.

Desirable Skills

• Experience working in an Agile/Scrum environment.
• Knowledge of SQL and basic database validation.
• Experience testing web applications, mobile applications, or APIs.
• Familiarity with API testing tools such as Postman.
• Understanding of non-functional testing principles, including usability, performance, and accessibility.
• Experience supporting UAT and working closely with business stakeholders.

Personal Attributes

• Methodical, organised, and detail-oriented.
• Proactive in identifying risks and potential defects.
• Able to manage competing priorities and meet deadlines.
• Strong communication and teamwork skills.
• Committed to delivering high-quality software and improving the customer experience.