Senior QA Automation Engineer

Seargin; Poland; On-site; PLN 120,000 - 190,000; Full time

Job summary

Seargin is seeking a Senior QA Automation Engineer to ensure quality for a complex platform built around microservices, distributed systems and event-driven communication. This highly technical QA role focuses on test automation, API and integration testing, and end-to-end flows, working closely with DevOps, developers and product teams.

You will design, implement and maintain automated test frameworks, validate REST APIs and events, and participate in root cause analysis for production issues.

Qualifications

• Several years of experience in QA / Software Testing with hands-on test automation.
• Proven experience building and maintaining automated testing frameworks.
• Strong experience with API, integration and end-to-end testing.
• Practical experience testing microservices and distributed systems.
• Experience testing event-driven and asynchronous communication, preferably with Kafka.
• Good knowledge of SQL and databases, with data validation as part of testing.
• Programming/scripting experience, preferably C#/.NET.
• Experience with Docker and/or Kubernetes.
• Strong analytical and problem-solving skills including root cause analysis and production issue investigation.
• Experience working in an Agile environment (Scrum or Kanban).
• Ability to collaborate with development, DevOps and product teams.

Responsibilities

• Design, develop and maintain automated test frameworks and test suites.
• Perform API, integration and end-to-end testing, not relying solely on UI.
• Test applications based on microservices and distributed architectures.
• Test event-driven and asynchronous workflows, including Kafka or similar messaging tech.
• Validate REST APIs, events, webhooks and other system-to-system communication.
• Work with SQL and NoSQL databases to validate data and system behavior.
• Investigate defects and production issues, perform root cause analysis and coordinate resolution.
• Work with Docker and Kubernetes in containerized environments.
• Contribute to test strategy, design and technical documentation.
• Collaborate with Developers, DevOps, Product Owners and other stakeholders to promote quality throughout the lifecycle.
• Continuously improve automation, testing processes and quality practices.

Skills

QA / Software Testing

Test automation

API testing

Integration testing

End‑to‑end testing

Microservices

Distributed systems

Event-driven testing

Kafka

SQL/Nosql validation

C#/.NET

Docker

Kubernetes

Agile / Scrum / Kanban

Tools

Docker

Kubernetes

Kafka

Playwright / Selenium

MongoDB / NoSQL

Job description

As a dynamic multinational tech company operating in 50 countries, we drive innovation and create projects that shape the future and greatly enhance the quality of life. You will find our solutions supporting advanced AI initiatives, financial analytics, and enterprise-scale digital transformation across global organisations.

About the Role

We are looking for a Senior QA Automation Engineer to join a team responsible for ensuring the quality of a complex platform built around microservices, distributed systems and event-driven communication.

This is a highly technical QA role focused on test automation, API and integration testing, backend systems and end-to-end flows. You will work closely with developers, DevOps and product teams to identify potential issues, investigate root causes and ensure that different services and systems work together reliably.

Responsibilities

• Design, develop and maintain automated test frameworks and test suites.
• Perform API, integration and end-to-end testing without relying only on the UI.
• Test applications based on microservices and distributed architectures.
• Test event-driven and asynchronous workflows, including Kafka or similar messaging technologies.
• Validate REST APIs, events, webhooks and other forms of system-to-system communication.
• Work with SQL and NoSQL databases to validate data and system behaviour.
• Investigate defects and production issues, perform root cause analysis and work with developers to resolve them.
• Work with containerized environments using Docker and Kubernetes.
• Contribute to test strategy, test design and technical documentation.
• Collaborate with Developers, DevOps, Product Owners and other stakeholders to promote quality throughout the development lifecycle.
• Continuously improve automation, testing processes and quality practices.

Requirements

• Several years of experience in QA / Software Testing, with strong hands-on test automation experience.
• Proven experience building and maintaining automated testing frameworks.
• Strong experience with API, integration and end-to-end testing.
• Practical experience testing microservices and distributed systems.
• Experience testing event-driven and asynchronous communication, preferably with Kafka or similar technologies.
• Good knowledge of SQL and databases, with experience validating data as part of testing.
• Programming/scripting experience, preferably C#/.NET.
• Experience with Docker and/or Kubernetes.
• Strong analytical and problem-solving skills, including root cause analysis and production issue investigation.
• Experience working in an Agile environment such as Scrum or Kanban.
• Ability to work effectively with development, DevOps and product teams.

Nice to have

• Kafka
• Playwright / Selenium
• MongoDB / NoSQL
• k6 or other performance testing tools
• Knowledge of mTLS, IAM or SSO
• Basic understanding of React.js

To learn more about Seargin, please visit our web page: www.seargin.com