Test Analyst – Integration Testing (OSB/WSO2, API Automation, Performance)

Vennote Technologies Limited is a technology company building robust, scalable digital solutions that power businesses. We specialize in Enterprise Applications, Managed Services, and Project Management,delivering technology solutions that help businesses run more efficiently and scale with confidence. We are recruiting to fill the position below:

Job Title: Test Analyst – Integration Testing (OSB/WSO2, API Automation, Performance)

Location: Lagos

Job Summary

You will design and execute the tests that prove each migrated service behaves exactly as its OSB original (functional equivalence), build and maintain the API/service automation suite that makes regression repeatable across migration waves, and run performance tests that confirm the WSO2 platform meets telecom SLAs under production-like load. The team is technical, agile and under deadline pressure; you are expected to read service specifications and payloads yourself, work directly with developers and architects, and defend test results in front of a demanding customer. Key responsibilities OSB/WSO2 service testing: Analyse OSB service fromspecifications, WSDL/XSD and OpenAPI contracts, pipelines, transformations and routing rules to derive test conditions; identify gaps and ambiguities before build starts. Design and execute functional, integration and end-to-end tests for OSB and WSO2 services: SOAP and REST calls, JMS/queue flows, DB and file adapters, security policies, fault and retry handling. Prove functional equivalence between each OSB service and its WSO2 MI replacement: same request, same response, same side effects, same error behaviour; run parallel-run comparisons during migration waves. Build test data and stubs/mocks for upstream and downstream BSS/OSS systems (CRM, billing, provisioning, product catalogue) when real systems are unavailable. API/service automation testing: Build and maintain the automated regression suite for the API/service layer (for example Postman/Newman, SoapUI/ReadyAPI, REST Assured, Karate or equivalent), covering contract, functional and negative scenarios. Integrate automation into the CI/CD pipeline so every migration wave and release is regression-tested automatically; maintain reporting dashboards. Automate response comparison between OSB and WSO2 outputs to speed up equivalence testing. Keep the suite stable and relevant as APIs are standardised and versioned. Performance testing: Define non-functional test strategy with the architects: throughput, latency, concurrency, soak, spike and failover scenarios reflecting telecom peak loads (bill runs, campaign launches, month-end). Build and run performance tests (JMeter, Gatling, LoadRunner or equivalent) against WSO2 MI/API Manager and compare against OSB baselines and SLAs. Analyse results with the platform team: bottlenecks, tuning recommendations, capacity findings; re-test after fixes. Test management and quality: Produce test plans, test cases, traceability matrices, defect reports and test summary/exit reports per wave. Log, triage and track defects to closure with developers; reproduce issues with precise evidence (payloads, logs, timings). Support SIT, UAT, cut-over rehearsals, go-live verification and hypercare, including out-of-hours windows. Stakeholder and customer work: Work day to day with a technical, agile, dynamic and demanding team of architects, OSB/WSO2 developers and analysts; take part in sprint planning, stand-ups and retrospectives. Explain test coverage, results and risks to technical stakeholders (platform owners, architects) and business stakeholders (application owners, business units). Hold a firm, evidence-based line on quality with a difficult customer and under time pressure: what passed, what failed, what the risk is, what it takes to close it. Flexibility: Extend hands-on help where the delivery needs it: test data setup, environment checks, documentation, defect analysis, supporting other testers or analysts. Available for cut-over windows and customer escalations outside standard hours when required.