qa engineer (manual) for a payment platform

The project is developing and integrating a modern payment platform for secure and reliable payment processing and interaction with external systems. It includes scalable microservices and asynchronous transaction processing, with a focus on resilience, security, and high availability.

• Perform functional testing of payment services
• Test REST APIs and system integrations
• Verify interactions between microservices and external systems
• Test Kafka-based messaging and asynchronous event processing
• Validate payment transaction states, including success, decline, cancel, refund, pending, and error
• Verify transitions between payment states
• Use SQL to validate transaction processing results
• Cross-check API responses, Kafka events, and database records
• Develop and maintain automated API tests
• Test retry mechanisms, timeouts, duplicate requests, and error recovery scenarios
• Analyze logs and trace requests across services
• Perform regression testing
• Develop test scenarios and prepare test data
• Report, document, and track defects
• Verify bug fixes and assess regression risks
• Test iOS and Android mobile applications
• Analyze automated test results and contribute to maintaining the regression test suite

• At least 3 years of commercial experience in functional and integration testing of backend systems
• Hands-on experience testing REST APIs
• Experience with integration testing across multiple interconnected systems
• Hands-on experience testing synchronous and asynchronous integrations using Kafka
• Understanding of event-driven architecture principles
• Strong SQL skills and experience validating database data
• Hands-on experience developing and maintaining automated tests for APIs and integrations; the programming language or framework is not essential
• Experience testing retries, timeouts, duplicate requests or events, integration failures, and recovery scenarios
• Understanding of HTTP, JSON, REST, and authentication and authorization mechanisms
• Experience analyzing logs and identifying root causes of defects in distributed systems
• Knowledge of test design techniques
• Experience validating data consistency across APIs, Kafka, and databases
• English at Intermediate level or above
• Будет плюсом: experience in banking, payment, or fintech projects, understanding of payment transaction lifecycles and payment system principles, test automation with Go, Python, Postman/Newman, REST Assured, or similar tools, experience testing iOS and Android mobile applications, understanding of Docker and Kubernetes

• The opportunity to change projects and/or develop expertise in an interesting business domain
• Mentoring and onboarding systems for every new employee
• Opportunity to earn up to an additional 1,000 EUR per month, depending on expertise, through participation in company activities; this amount is included in the annual bonus
• Access to the corporate training portal and its regularly updated knowledge base
• Corporate events and amenities, including parties, pizza days, PlayStation, fruit, coffee, snacks, and movies
• Certification compensation (AWS, PMP, etc.)
• Referral program
• Private health insurance and sports compensation, depending on the type of employment