Full Stack QA Engineer (Fintech)

Location: Almaty, Kazakhstan; hybrid work with office attendance

Company

Tech Duck is an international software development and outsourcing company working on high-load distributed platforms, cloud environments, system integrations, and secure payment infrastructure.

What you will do

• Perform functional, regression, integration, and mobile testing for payment services and iOS and Android applications.
• Test REST APIs, microservices, Kafka messaging, asynchronous events, and integrations with external systems.
• Validate payment transaction states, state transitions, retries, timeouts, duplicate requests, failures, and recovery scenarios.
• Use SQL to verify transaction results and cross-check API responses, Kafka events, and database records.
• Develop and maintain automated API and integration tests, prepare test data, and analyze automated regression results.
• Analyze logs, trace requests across distributed services, document defects, verify fixes, and assess regression risks.

Requirements

• 3+ years of commercial experience in functional and integration testing of backend systems.
• Hands-on experience with REST API testing, interconnected systems, Kafka, synchronous and asynchronous integrations, and event-driven architecture.
• Strong SQL skills and experience validating data consistency across APIs, Kafka, and databases.
• Experience developing and maintaining automated tests for APIs and integrations, including testing retries, timeouts, duplicate requests, failures, and recovery scenarios.
• Understanding of HTTP, JSON, REST, authentication and authorization, test design techniques, and root-cause analysis in distributed systems.
• English at Intermediate level or above.

Nice to have

• Experience with banking, payment, or fintech projects and understanding of payment transaction lifecycles.
• Automation experience with Go, Python, Postman/Newman, REST Assured, or similar tools.
• Experience testing iOS and Android applications.
• Understanding of Docker and Kubernetes.

Culture & Benefits

• Opportunity to work with fintech, healthcare, retail, and telecom businesses.
• Project changes and professional, financial, and career development opportunities.
• Mentoring, onboarding support, and access to a continuously updated corporate training portal.
• Certification compensation, referral program, and corporate events.
• Private health insurance and sports compensation depending on the employment type.