N-iX is seeking a skilled Senior QA Engineer to join a key digital transformation initiative for a leading commercial retail bank.
Responsibilities:
- Design, build, and maintain robust API test automation frameworks in Java (REST Assured, TestNG/JUnit) for asynchronous Temporal workflows and Spring Boot services.
- Perform functional, integration, and regression testing of end-to-end customer journeys across staging, pre-release, and production-like environments for web/mobile channels.
- Work extensively with mocks and stubs for core banking interfaces (core processing engine, central customer registry, enterprise logging, central document repository, and automated photo verification systems) to enable early and continuous integration testing.
- Define test data requirements and coordinate with the client’s testing department to order synthetic test profiles (verifying parent-child relationships, minor age restrictions, and tax ID validation).
- Integrate automated test suites into CI/CD pipelines (GitLab CI). Monitor SonarQube quality gates, log and track defects in Jira, and perform root-cause analysis for failed workflow executions.
- Collaborate with the client’s central QA team and business stakeholders during User Acceptance Testing (UAT), performance benchmarks, and security release validations.
Requirements:
- 5+ years of experience in Quality Assurance with a strong balance between Automation (Java) and Manual API testing in complex enterprise, banking, or fintech environments.
- Proficiency in Java 17+, REST Assured, JUnit/TestNG, WireMock/Mockito (or similar mocking tools), and Maven/Gradle.
- Deep understanding of RESTful API testing, JSON/XML contract validation, HTTP protocols, and testing asynchronous or event-driven architectures (Kafka, background execution workers).
- Proven experience in designing, building, and maintaining custom mock services from scratch to simulate complex backend interactions, including the ability to actively extend and support dynamic API stubs for application integration testing.
- Hands-on experience testing multi-tier architectures using mocks/stubs, analyzing backend logs (OpenSearch/Elasticsearch, Kibana), and managing complex test data setups.
- Strong experience with Git, GitLab CI/CD, Postman/Swagger, Jira, Confluence, and SonarQube.
We offer*:
- Flexible working format - remote, office-based or flexible
- A competitive salary and good compensation package
- Personalized career growth
- Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
- Active tech communities with regular knowledge sharing
- Education reimbursement
- Memorable anniversary presents
- Corporate events and team buildings
- Other location-specific benefits
*not applicable for freelancers
Skills Required
- 5+ years of Quality Assurance experience
- Strong experience balancing Java automation and manual API testing
- Experience in enterprise, banking, or fintech environments
- Proficiency with Java 17 or newer
- Proficiency with REST Assured and JUnit or TestNG
- Experience with WireMock, Mockito, or similar mocking tools
- Experience with Maven or Gradle
- Deep understanding of REST API testing, JSON/XML contract validation, and HTTP protocols
- Experience testing asynchronous or event-driven architectures, including Kafka and background workers
- Experience designing and maintaining custom mock services and dynamic API stubs
- Experience testing multi-tier architectures and analyzing backend logs
- Experience managing complex test data setups
- Experience with Git, GitLab CI/CD, Postman, Swagger, Jira, Confluence, and SonarQube
What We Do
N-iX is a global software solutions and engineering services company that helps world’s leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology. Whether you need to build a custom solution, modernize your digital product or acquire extra tech expertise - we have the experience and capabilities to ensure your success. With over 2,000 professionals in 25 countries across Europe and the Americas, N-iX offers expert solutions in cloud, data analytics, embedded software, IoT, AI, machine learning, and other tech domains. Being in business for over two decades, we have worked with dozens of industry-leading enterprises and Fortune 500 companies creating value across a wide variety of sectors, including finance, manufacturing, supply chain, retail, e-commerce, healthcare, and more. Our unique combination of business domain expertise and technical know-how enables us to effectively collaborate with ISVs, tech companies, and enterprises of all sizes. Thanks to the strong tech ecosystem and partnerships with AWS, GCP, Microsoft, SAP, OpenText, Snowflake, and others, we bring extra speed, scale and efficiency to more than 160 organizations across the globe. N-iX is recognized by numerous industry awards, such as CRN Solution Provider 500, Global Outsourcing 100 by IAOP, ISG Provider Lens™, Modern Application Development services providers by Forrester, etc
