Senior Security Tester (f/m/x)
Offer summary

(Summary generated by AI based on the full job description)

The project focuses on security testing within an Agile/DevSecOps setup for web applications and REST APIs. Key technologies and tools include REST API, AWS/Azure/GCP and JIRA, Confluence, Git. Responsibilities cover defining and executing manual tests, creating test strategies and plans, maintaining test artifacts and environments, providing scenarios for automation and performance testing, log analysis and initial bug triage, and running workshops with cross-team coordination.

Senior Security Tester (f/m/x)

Company: Sii Sp. z o.o.

from: 2 October 2026
to: 1 November 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Kraków, Podgórze
Kraków, PodgórzeWadowicka 12View on map

Requirements

Expected technologies

AWS
GCP
REST APIs
Agile Methodology
Microsoft Azure

Our requirements

  • Minimum 5 years of experience in software testing within an Agile environment
  • Excellent knowledge of software testing theory and practices in Agile methodology
  • Proficiency in designing and conducting manual tests for web applications and REST APIs
  • Strong communication skills with the ability to manage workshops and collaborate with cross-functional teams
  • Experience with cloud environments such as AWS, Azure, and GCP
  • Hands-on background in cybersecurity testing
  • Competency in using tools like JIRA, Confluence, and Git for project management and collaboration
  • Advanced level of English

Optional

  • Previous work with API development and familiarity with REST and HTTP protocols
  • Knowledge of vulnerability scanning and application security scanning tools (SAST, MAST, DAST)
  • ISTQB certification
  • Experience with performance testing and using tools like QTest, Tricentis, or Zephyr
  • Familiarity with governance, risk, and compliance processes

Your responsibilities

  • Working with product owners to manage backlogs and define new requests, including clear and testable acceptance criteria
  • Driving and managing testing phases of projects to ensure quality delivery
  • Participating in the creation of test strategies and the implementation of test plans for specific application components
  • Maintaining and defining manual test artifacts, metrics, and environments to support testing efforts
  • Providing test scenarios for automation and performance tests to enhance testing coverage
  • Obtaining cross-team consensus to drive progress towards project goals
  • Designing and conducting various types of tests, including regression, performance, and functional tests
  • Identifying exceptions in application logs and performing initial triage for managing bugs and tests
Company

About the project

We are looking for an experienced Security Tester to join the team in a hybrid work environment. You will play a crucial role in defining and executing manual tests for software changes within an Agile, DevSecOps delivery framework. Collaborating closely with product owners and the QA team, you will help ensure the quality and security of our applications. If you are passionate about software testing and eager to contribute to innovative projects, this opportunity may be the right fit for you.

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People

Recruitment stages

  • 1.
    Send your CV
  • 2.
    Talk to us about your expectations
  • 3.
    Learn more about our projects and choose the best
  • 4.
    Start your adventure with Sii!

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work

Senior Security Tester (f/m/x)
I apply to:
Sii Sp. z o.o.
Kraków, Podgórze
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