Senior .NET Test Automation Engineer - Performance & API

Sii Poland; Warszawa; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Medical care

Open and accessible management team

MySii app

Job summary

Sii Poland is seeking a Test Automation Engineer to join a long-term banking project for a leading external client. You will become part of an agile team responsible for ensuring the high performance and stability of business-critical systems.

Your tasks include designing and implementing automated performance test scripts, maintaining test frameworks, and supporting CI processes. The role requires 4+ years in test automation, full-stack testing (GUI, API, databases), ISTQB knowledge, and strong

Qualifications

• 4+ years of test automation experience
• Experience with full-stack test automation (GUI/mobile, API/web services, databases)
• Experience across environments and test levels
• Knowledge of TDD/BDD/Page Object Model and related best practices
• ISTQB foundation level knowledge or plan to certify within 3 months
• Proficiency in Polish and English for an international environment

Responsibilities

• Design and implement automated performance test scripts
• Execute non-functional tests and analyze results
• Identify, report, verify, and debug defects
• Review requirements and designs from testing perspective
• Maintain and extend test automation frameworks
• Prepare and manage test data and dependencies
• Recommend actions based on test outcomes and metrics
• Collaborate with the Scrum team to ensure quality
• Support CI processes for automated tests
• Participate in risk mitigation and test communications

Skills

Test automation

Full-stack test automation

ISTQB foundation

Git version control

Polish & English language

Tools

.NET stacks

Job description

Sii Poland is seeking a Test Automation Engineer to join a long-term banking project for a leading external client. You will become part of an agile team responsible for ensuring the high performance and stability of business-critical systems.

Your tasks include designing and implementing automated performance test scripts, maintaining test frameworks, and supporting CI processes. The role requires 4+ years in test automation, full-stack testing (GUI, API, databases), ISTQB knowledge, and strong