Senior Manual QA Engineer

Salary range: B2B - 25-28 E/h + VAT

Ciklum is looking for a Senior QA Engineer to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the Role:

Ciklum is looking for a Senior QA Engineer to join our team full-time in Poland to work on Boerse Stuttgart’s trading applications.

The project focuses on maintaining and extending mission-critical trading systems ensuring stability, scalability, and real-time data integrity. You will work in a cross-functional agile team, closely collaborating with developers, analysts, and DevOps to validate trading workflows, and ensure consistent quality across high-availability environments.

This role requires strong analytical and technical skills, experience with manual testing of backend and UI components, and a proactive approach to process improvement and test design in complex financial systems.

Responsibilities:

• Design, plan, and execute manual test cases for backend services and trading modules

• Ensure end-to-end system validation across multiple components and data flows

• Review and verify RESTful APIs using tools such as Postman, Swagger, or custom scripts

• Build and maintain regression test suites (e.g., with XUnit, NUnit, or similar frameworks)

• Collaborate with developers to ensure proper test coverage and defect resolution

• Participate in sprint planning, backlog grooming, and release validation activities in Jira

• Maintain and improve test documentation and procedures in Confluence / AsciiDoc

• Perform functional, regression, smoke, and integration testing in complex environments (multiple configurations and components)

• Validate network communication (TCP/IP) and ensure correct message flow between trading modules

• Support continuous improvement by identifying gaps in processes, documentation, and tooling

• Work closely with the QA Lead and product teams to ensure stable, compliant, and high-performing releases

Requirements:

• 5+ years of experience in QA / Testing, preferably in financial or trading systems

• Strong knowledge of software testing principles, including regression, integration, and system testing

• Experience with API testing (Postman, Swagger, REST clients)

• Solid understanding of SQL and ability to validate data consistency in MSSQL databases

• Familiarity with TCP/IP, socket communication, and message-based architectures

• Proficiency in Jira (issue tracking, reporting) and Confluence for documentation

• Strong analytical mindset and attention to detail

• Excellent communication skills and ability to collaborate in a distributed team

Desirable:

• Experience with CI/CD integration for testing pipelines (GitLab, Jenkins)

• Familiarity with Docker and containerized test environments

• Knowledge of performance and load testing tools (JMeter, k6, etc.)

• Understanding of message brokers (Solace, Kafka, RabbitMQ)

• Experience in financial/trading domain testing and regulatory compliance validation

• Basic knowledge of monitoring tools for QA in microservice environments

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment

• Growth focus: Take on large-scale projects with a global impact and expand your expertise

• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications

• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies

• Flexibility: Enjoy flexibility – full remote working possibilities

• Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

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Explore, empower, engineer with Ciklum

Interested already? We would love to get to know you Submit your application. We can’t wait to see you at Ciklum.