May 22, 2026

Penetration Tester

Mid • Remote

3,500 - 5,500 USD

Warsaw, Poland

Andersen is hiring a Penetration Tester to strengthen application and infrastructure security across international digital projects. 

 Andersen is a pre-IPO software development company providing a full cycle of services. For over 19 years, we have been helping enterprises and middle-sized firms worldwide transform their businesses by creating effective digital solutions using innovative technologies.  

Today, we are working with organizations from various parts of the world, including North America, Western Europe, Israel, Australia, and the UAE. Our expertise covers FinTech, Healthcare, Retail, Telecom, Media & Entertainment, Logistics, Travel & Hospitality, eCommerce, and other industries. 

Responsibilities: 

  • Conducting and facilitating customer workshops. 

  • Communicating with leads and stakeholders during pre-sales calls. 

  • Gathering and analyzing business and technical requirements. 

  • Preparing scope estimations for commercial proposals, including ballpark and detailed estimations. 

  • Performing penetration tests of web servers, web applications, and internal infrastructure. 

  • Managing the application security program, including the implementation of SSDLC for a highly dynamic and extensive engineering team. 

  • Managing internal bug bounty program, validating and triaging findings, following up on remediation guidelines. 

  • Reviewing the IaC codebases for security misconfigurations and weaknesses, as well as securing GitOps CI/CD pipelines. 

  • Integrating and tuning SAST/DAST tools (CodeQL, SonarQube, Burp Enterprise) to optimize build performance and vulnerability detection. 

  • Securing cloud-native infrastructure (Azure, AWS) and Kubernetes clusters through custom policies and runtime protection. 

  • Implementing security best practices for Linux and Windows servers as part of the hardening process. 

  • Administering networking hardware and firewalls (Cisco ASA, pfSense) with security best practices in mind. 

  • Supporting the development and implementation of information security policies across an extensive, nation-spanning digital infrastructure. 

  • Assisting in the implementation of security solutions such as NGFW, EDR, IDS/IPS. 

  • Shadowing penetration tests conducted by senior testers. 

  • Performing tasks, such as information gathering, vulnerability analysis, and report writing. 

  • Performing security audits on network devices to assure conformity to security best practices. 

Must-haves: 

  • Strong hands-on experience in Application Security / Penetration Testing for 2+ years. 

  • Deep expertise in web application penetration testing and vulnerability assessment. 

  • Experience securing cloud-native environments (AWS and/or Azure). 

  • Practical knowledge of SSDLC implementation and secure development practices. 

  • Experience reviewing and securing CI/CD and GitOps pipelines. 

  • Strong understanding of IaC security (Terraform, Ansible, infrastructure code reviews). 

  • Experience with Kubernetes/container security. 

  • Hands-on experience with security tooling such as Burp Suite, Metasploit, Trivy, Falco, SAST/DAST tools. 

  • Strong networking and infrastructure security knowledge (TCP/IP, firewalls, routing, switching). 

  • Experience performing infrastructure/network penetration testing. 

  • Strong Linux and Windows security hardening knowledge. 

  • Scripting skills (Python, Bash, PowerShell). 

  • Experience writing technical security reports and communicating findings to engineering/business stakeholders. 

  • Experience working directly with developers to remediate vulnerabilities. 

  • Understanding of security standards/compliance frameworks (SOC2, ISO27001, etc.). 

  • Ability to work independently in a self-managed environment. 

  • Level of English – Upper-Intermediate and above. 

Nice-to-haves: 

  • OSCP certification. 

  • Experience with bug bounty programs. 

  • Experience with threat modeling exercises. 

  • Knowledge of Active Directory security and common exploitation techniques. 

  • Experience with VMware/vSphere or virtualization technologies. 

  • Experience building or improving security logging/monitoring infrastructure. 

  • Experience defining or implementing enterprise security policies. 

  • Experience with blue team / defensive security activities. 

  • Exposure to large-scale enterprise environments. 

  • Experience working in product companies rather than only outsourcing/consulting. 

  • Experience securing high-load or data-intensive applications. 

  • Familiarity with DevSecOps practices and security automation. 

  • Previous mentoring or technical leadership experience. 

  • Experience coordinating with cross-functional stakeholders and engineering teams. 

Reasons why this job would be interesting to you: 

  • Andersen cooperates with such companies as Siemens, Johnson & Johnson, AstraZeneca, BNP Paribas, Allianz, Ryanair, TUI, Verivox, Media Markt, etc.. 

  • For the past four years, our company has been growing annually by 60–100%, and we constantly involve top-notch specialists in our team. 

  • Andersen has mentoring and adaptation systems for new employees, and transparent performance review and assessment systems will allow you to determine your development path and plan your growth. 

  • The most important thing that we value in our employees is a commitment to continuous learning. The company supports them in this and gives them access to the best educational platforms, seminars, and practices. In addition, for over 19 years, Andersen has assembled a huge knowledge base and established a robust resource management institution. 

  • We have been strengthening our expertise since 2007. During this time, we have formed excellent teams with streamlined processes, where you can learn something new from your colleagues every day and enjoy your work. 

  • We are a cool young team of like-minded people communicating informally. 

  • You'll have a stable and competitive salary and an extensive benefits package. 

  • At Andersen, we have many different ways to grow. You can improve as a specialist or a manager, and all your activities will be decently rewarded. 

Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy/pl

Join us!   

 https://people.andersenlab.com/ 

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It involves driving end-to-end quality assurance for complex enterprise integrations. 🗂️ Requirements: 3+ years of experience in software testing, Experience in API testing including functional and non-functional testing, Ability to design and execute test strategies for APIs and integrations, Experience with database validations and SQL, Hands-on testing of modern web applications, Understanding of enterprise integration patterns, Knowledge of backend systems and system architecture, Experience with frontend UI and backend service testing, Ability to handle complex third-party API integrations, English level Intermediate+ or higher 📃 Skills: API, SQL, React, PHP, Go, Databases, REST, eCommerce, Automation, Integration 🏢 Description: Andersen is hiring a QA Engineer for a global insurance leader. The project focuses on developing and maintaining an integration layer for seamless communication between core systems and external platforms. Our customer is a global leader in the insurance and assistance sector, offering a wide range of international solutions across various domains including health, life, travel, and automotive services. The organization is committed to delivering cutting-edge, agile IT solutions while driving digital transformation and sustainability across its operations. The project is focused on developing and maintaining an integration layer that enables seamless communication and data exchange between core systems and multiple external platforms, ensuring reliable and efficient support of business processes. Responsibilities: Ensuring backend systems reliability and performance through rigorous API testing, including both functional and non-functional aspects. Owning and driving the end-to-end user quality experience across web and backend platforms. Creating, maintaining and executing comprehensive test plans and test cases across multiple browsers and platforms. Actively supporting software development and IT teams by thoroughly testing new features and providing actionable feedback. Collaborating in the design of test strategies, including detailed API and integration testing approaches. Analyzing and troubleshooting problems, documenting findings and working with relevant teams to ensure timely resolutions. Providing ongoing suggestions for software quality improvements and test process optimization of API. Must-haves: Proven experience in software testing roles for 3+ years. Strong ability to create API requests, review and suggest improvements to API documentation and design comprehensive test scenarios that cover functional, non-functional, performance and reliability aspects. Solid experience designing and executing test strategies for APIs, integrations and database level validations. Hands-on testing experience with modern web applications and eCommerce platforms built using frameworks like React, PHP, Go and similar technologies. Solid understanding of enterprise integration patterns and workflows. Strong understanding of backend systems, databases, SQL and system architecture fundamentals. Ability to perform test planning, design and execution for both frontend UI and backend services. Proficiency in handling complex integration scenarios involving third party APIs, internal tools and data synchronization. Ability to define test strategies and collaborate across teams to validate dependencies, data flows and performance across all touchpoints. Level of English – from Intermediate+ and above. Nice-to-haves: Experience in QA automation. Familiarity with API automation testing/scripting. Reasons why this job would be interesting to you: Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc.. The opportunity to change the project and/or develop expertise in an interesting business domain. Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant. Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee. The opportunity to earn up to an additional 1,000 USD per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities. Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated. Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies). Certification compensation (AWS, PMP, etc). Referral program. English courses. Private health insurance and compensation for sports activities. Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy/pl Join us! https://people.andersenlab.com/

Technology

Andersen

QA Engineer

Mid

Remote

Bucharest, Romania

🏢 Summary: The offer is for a QA Engineer role focused on testing and ensuring reliability of an integration layer connecting core systems with external platforms in a global insurance environment. The position emphasizes API, integration, and backend testing to guarantee performance, reliability, and seamless data exchange across systems. The role involves end-to-end quality ownership across web and backend platforms. 🗂️ Requirements: 3+ years of experience in software testing, Strong API testing and API request creation skills, Experience designing and executing API and integration test strategies, Experience with database validations and SQL, Hands-on testing of modern web applications, Understanding of enterprise integration patterns, Knowledge of backend systems and system architecture, Ability to perform frontend and backend test planning and execution, Experience with complex third-party API integrations, English level Intermediate+ or higher 📃 Skills: API, SQL, React, PHP, Go, Databases, Integration, Testing, Backend, Frontend 🏢 Description: Andersen is hiring a QA Engineer for a global insurance leader. The project focuses on developing and maintaining an integration layer for seamless communication between core systems and external platforms. Our customer is a global leader in the insurance and assistance sector, offering a wide range of international solutions across various domains including health, life, travel, and automotive services. The organization is committed to delivering cutting-edge, agile IT solutions while driving digital transformation and sustainability across its operations. The project is focused on developing and maintaining an integration layer that enables seamless communication and data exchange between core systems and multiple external platforms, ensuring reliable and efficient support of business processes. Responsibilities: Ensuring backend systems reliability and performance through rigorous API testing, including both functional and non-functional aspects. Owning and driving the end-to-end user quality experience across web and backend platforms. Creating, maintaining and executing comprehensive test plans and test cases across multiple browsers and platforms. Actively supporting software development and IT teams by thoroughly testing new features and providing actionable feedback. Collaborating in the design of test strategies, including detailed API and integration testing approaches. Analyzing and troubleshooting problems, documenting findings and working with relevant teams to ensure timely resolutions. Providing ongoing suggestions for software quality improvements and test process optimization of API. Must-haves: Proven experience in software testing roles for 3+ years. Strong ability to create API requests, review and suggest improvements to API documentation and design comprehensive test scenarios that cover functional, non-functional, performance and reliability aspects. Solid experience designing and executing test strategies for APIs, integrations and database level validations. Hands-on testing experience with modern web applications and eCommerce platforms built using frameworks like React, PHP, Go and similar technologies. Solid understanding of enterprise integration patterns and workflows. Strong understanding of backend systems, databases, SQL and system architecture fundamentals. Ability to perform test planning, design and execution for both frontend UI and backend services. Proficiency in handling complex integration scenarios involving third party APIs, internal tools and data synchronization. Ability to define test strategies and collaborate across teams to validate dependencies, data flows and performance across all touchpoints. Level of English – from Intermediate+ and above. Nice-to-haves: Experience in QA automation. Familiarity with API automation testing/scripting. Reasons why this job would be interesting to you: Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc.. The opportunity to change the project and/or develop expertise in an interesting business domain. Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant. Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee. The opportunity to earn up to an additional 1,000 USD per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities. Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated. Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies). Certification compensation (AWS, PMP, etc). Referral program. English courses. Private health insurance and compensation for sports activities. Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy Join us! https://people.andersenlab.com/

Technology

Andersen

QA Engineer

Mid

Remote

🏢 Summary: QA Engineer role focused on testing and ensuring reliability of an integration layer connecting core systems with external platforms. The position emphasizes API, integration, and backend testing to guarantee performance, reliability, and seamless data exchange. Responsibilities include designing test strategies, executing comprehensive test plans, and validating complex integration scenarios across web and backend systems. 🗂️ Requirements: 3+ years of experience in software testing, Strong API testing and API request creation skills, Experience designing and executing API and integration test strategies, Experience with database validations and SQL, Hands-on testing of web applications built with modern frameworks, Understanding of enterprise integration patterns, Knowledge of backend systems and system architecture fundamentals, Ability to perform frontend and backend test planning and execution, Experience testing third-party API integrations and data synchronization, English level Intermediate+ or higher 📃 Skills: API, SQL, React, PHP, Go, REST, Postman, Databases, Integration, eCommerce 🏢 Description: Andersen is hiring a QA Engineer for a global insurance leader. The project focuses on developing and maintaining an integration layer for seamless communication between core systems and external platforms. Our customer is a global leader in the insurance and assistance sector, offering a wide range of international solutions across various domains including health, life, travel, and automotive services. The organization is committed to delivering cutting-edge, agile IT solutions while driving digital transformation and sustainability across its operations. The project is focused on developing and maintaining an integration layer that enables seamless communication and data exchange between core systems and multiple external platforms, ensuring reliable and efficient support of business processes. Responsibilities: Ensuring backend systems reliability and performance through rigorous API testing, including both functional and non-functional aspects. Owning and driving the end-to-end user quality experience across web and backend platforms. Creating, maintaining and executing comprehensive test plans and test cases across multiple browsers and platforms. Actively supporting software development and IT teams by thoroughly testing new features and providing actionable feedback. Collaborating in the design of test strategies, including detailed API and integration testing approaches. Analyzing and troubleshooting problems, documenting findings and working with relevant teams to ensure timely resolutions. Providing ongoing suggestions for software quality improvements and test process optimization of API. Must-haves: Proven experience in software testing roles for 3+ years. Strong ability to create API requests, review and suggest improvements to API documentation and design comprehensive test scenarios that cover functional, non-functional, performance and reliability aspects. Solid experience designing and executing test strategies for APIs, integrations and database level validations. Hands-on testing experience with modern web applications and eCommerce platforms built using frameworks like React, PHP, Go and similar technologies. Solid understanding of enterprise integration patterns and workflows. Strong understanding of backend systems, databases, SQL and system architecture fundamentals. Ability to perform test planning, design and execution for both frontend UI and backend services. Proficiency in handling complex integration scenarios involving third party APIs, internal tools and data synchronization. Ability to define test strategies and collaborate across teams to validate dependencies, data flows and performance across all touchpoints. Level of English – from Intermediate+ and above. Nice-to-haves: Experience in QA automation. Familiarity with API automation testing/scripting. Reasons why this job would be interesting to you: Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc.. The opportunity to change the project and/or develop expertise in an interesting business domain. Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant. Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee. The opportunity to earn up to an additional 1,000 USD per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities. Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated. Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies). Certification compensation (AWS, PMP, etc). Referral program. English courses. Private health insurance and compensation for sports activities. Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy Join us! https://people.andersenlab.com/

Technology

Andersen

Full Stack QA Engineer

Senior

Remote

Warsaw, Poland

2,400 - 3,500 USD

🏢 Summary: The offer is for a Full Stack QA Engineer to support quality assurance and automation testing of web and mobile digital platforms, ensuring reliability, performance, and smooth CI/CD integration. The role involves manual and automated testing within Agile teams, focusing on complex systems and continuous product improvement. 🗂️ Requirements: 4+ years of QA Automation experience, Experience in testing complex inventory management processes, Strong knowledge of test automation using JavaScript, Experience working in Agile teams and participating in Scrum ceremonies, Experience with common test and collaboration tools in Agile environments, English level Intermediate+ or higher 📃 Skills: JavaScript, QA, Automation, CI/CD, Scrum, Agile, Testing 🏢 Description: Andersen is hiring a Full Stack QA Engineer for a project supporting quality assurance and testing of digital web and mobile platforms to ensure reliability and performance. Our customer is an international technology-driven company developing digital products and online services that simplify important everyday decisions for users. The organization builds scalable customer-focused solutions, combining modern technologies, innovation, and user-centered design principles. The company emphasizes continuous product improvement, service quality, and long-term digital development. The project is focused on supporting quality assurance activities for digital platforms across automotive and property domains. It includes testing web and mobile solutions to ensure platform quality, reliability, and performance for upcoming product enhancements. Responsibilities: Actively participating in all Scrum ceremonies. Engaging in the validation of sites/apps at various stages, such as pre-release and post-release, under different platform/network conditions. Conducting testing using diverse strategies. Documenting and sharing discovered bugs with team. Gradually automating high-priority test cases for integration with the CI/CD pipeline for sustained efficiency. Must-haves: Experience in QA Automation for 4+ years. Experience in QA/testing of complex inventory management processes. Strong method knowledge in test automation (JavaScript). Experience in applying agile methods in an Agile team. Dealing with common test and collaborative working tools of agile software development. High degree of initiative and a sense of responsibility. Level of English – from Intermediate+ and above. Reasons why this job would be interesting to you: Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc.. The opportunity to change the project and/or develop expertise in an interesting business domain. Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant. Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee. The opportunity to earn up to an additional 1,000 USD per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities. Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated. Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies). Certification compensation (AWS, PMP, etc). Referral program. English courses. Private health insurance and compensation for sports activities. Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy/pl Join us! https://people.andersenlab.com/