Parikshit B.

I am an API and Backend QA Specialist with deep experience testing billing, payment, and revenue-critical systems. I focus on validating the workflows where most production failures occur—between systems, not on the UI. Total experience is 6 years now. My work ensures that invoices, payments, refunds, and revenue events are accurate, traceable, and resilient under real-world scenarios. What I Specialize In ----------------------- API testing for billing and payment platforms End-to-end validation of subscription, invoicing, refund, and proration flows Integration testing across payment gateways, webhooks, and internal services Backend data validation (requests → processing → database → downstream systems) Negative, edge-case, and failure-scenario testing Billing & Payment Workflows I Test Subscription creation, upgrades, downgrades, cancellations Invoice generation and recalculation Payment success, failure, retry, and webhook handling Refunds, chargebacks, credits, and adjustments Tax, currency, and multi-plan scenarios Revenue consistency across systems How I Approach API & Integration QA ----------------------------------------------- I start by understanding money flow, not endpoints I map request → service → webhook → database → invoice → reporting I validate idempotency, retries, and error handling I test for data accuracy across systems, not just 200 responses I report issues with financial impact context, not raw logs Tools & Environment ------------------------ Postman for REST / GraphQL API testing Structured API collections and test scenarios Jira & Confluence for defect tracking and documentation Agile / SaaS product teams When You Should Hire Me You are building or maintaining a subscription or billing system Payment failures or invoice mismatches are business-critical risks You need confidence before releasing billing changes You want a QA partner who understands revenue impact, not just APIs I am happy to review your billing flow and suggest a focused testing strategy for your current system.