Senior QA Engineer(Data Platform Testing)

Job description

Company Description Experian is a global data and technology company, powering opportunities for people and businesses around the world. We help to redefine lending practices, uncover and prevent fraud, simplify healthcare, create marketing solutions, and gain deeper insights into the automotive market, all using our unique combination of data, analytics and software. We also assist millions of people to realize their financial goals and help them save time and money. We operate across a range of markets, from financial services to healthcare, automotive, agribusiness, insurance, and many more industry segments. We invest in people and new advanced technologies to unlock the power of data. As a FTSE 100 Index company listed on the London Stock Exchange (EXPN), we have a team of 22,500 people across 32 countries. Our corporate headquarters are in Dublin, Ireland. Learn more at experianplc.com. Job Description Role Overview We are looking for an experienced Automated Tester to build and evolve a robust, scalable automation capability across APIs, data pipelines, and our graph‑based identity platform. This role spans CI/CD gating, automated data and contract validation, graph integrity testing, performance and regression testing, and full end‑to‑end API testing within AWS. The successful candidate will ensure that our identity platform consistently meets quality, compliance, and operational standards. Key Responsibilities Design, implement, and maintain automated test suites across API, data workflow, and graph components, integrating them into CI/CD pipelines with quality gates (unit, static analysis/security, data quality, contract/compliance, and final integrity checks). Own CI/CD quality enforcement , including gated releases, automated evidence of test results, and publish blocks when validation fails (e.g., consent, schema, integrity, scoring). Develop automated contract and compliance checks , including schema validation, required fields mapping, TCF/consent validation, and PII‑risk checks aligned to governance requirements. Build and execute automated end‑to‑end API tests using tools such as Bruno, Insomnia, or Postman, validating API behaviour through API Gateway, Lambda integrations, and downstream data/graph operations. Build data quality monitors (nulls/ranges, volume deltas, distribution checks) and statistical tests suited to identity clusters; operationalize them as part of routine runs. Create graph integrity tests in Neo4j , covering node/edge parity, constraints, traversal path validation, merge/split detection, and evidence‑path reproducibility checks. Implement performance and resilience testing , including query latency targets, batch window completion for rebuilds, and regression suites for every deployment. Contribute to operational guardrails by instrumenting monitoring, alerting, and cost‑aware test strategies; collaborate with engineering to ensure predictable weekly rebuild cadence and controlled ad‑hoc extracts. API Testing Ability to design and implement end‑to‑end automated API tests using Bruno, Insomnia, Postman , or similar frameworks. Strong understanding of REST API behaviours , request chaining, environment variables, authentication flows, and test assertions. Experience testing APIs running on AWS API Gateway with Lambda backends, including understanding of routing, payload transformations, throttling, and logging. AWS Hands‑on experience with: S3 (structured landing/prepared zones and artefact validation). IAM (roles/permissions for automated testing and least‑privilege CI/CD). Airflow/MWAA (end‑to‑end workflow testing, scheduled rebuilds, and validation tasks). Logging/monitoring (instrumentation for quality gates, alerts, and evidence capture). Data & API Testing Data contract and schema validation ; automated data quality checks (null/range, volume deltas, distribution/consistency) for identity datasets. Performance testing for query latency and batch‑process windows; regression testing for rebuilds and deployments. Compliance validation (consent enforcement, PII risk, audit‑ready outputs) integrated into automated pipelines. Qualifications Drift detection and score distribution monitoring for identity resolution outcomes; alerting on behavioural/statistical shifts. Consent and governance checks that mirror operational policies (e.g., consent‑only processing at node/edge level, version‑controlled thresholds). Prior testing experience with identity resolution / data science / probabilistic systems —including calibration/threshold validation and explainability. Familiarity with observability (alerts, dashboards) to uphold guardrails on performance, resilience, and cost visibility. Python, Data testing, API Testing, Reporting, Automation Strong CI/CD automation with gated release controls and the ability to block publication when gates fail (e.g., consent, integrity, scoring). Experience integrating automated suites into Harness CI/CD tool. Nice‑to‑Have Experience: Data‑driven SaaS platforms; regulated data processing environments Contract‑testing frameworks (e.g., Pact) and property‑based testing approaches Cloud observability stacks (e.g., CloudWatch/OpenSearch/Grafana) for pipeline and API SLOs Additional Information Our uniqueness is that we celebrate yours. Experian's culture and people are important differentiators. We take our people agenda very seriously and focus on what matters; DEI, work/life balance, development, authenticity, collaboration, wellness, reward & recognition, volunteering... the list goes on. Experian's people first approach is award-winning; World's Best Workplaces™ 2024 (Fortune Top 25), Great Place To Work™ in 24 countries, and Glassdoor Best Places to Work 2024 to name a few. Check out Experian Life on social or our Careers Site to understand why. Experian is proud to be an Equal Opportunity and Affirmative Action employer. Innovation is an important part of Experian's DNA and practices, and our diverse workforce drives our success. Everyone can succeed at Experian and bring their whole self to work, irrespective of their gender, ethnicity, religion, colour, sexuality, physical ability or age. If you have a disability or special need that requires accommodation, please let us know at the earliest opportunity. Experian Careers - Creating a better tomorrow together Find out what its like to work for Experian by clicking here