• Role: Senior SDET / Test Automation Engineer
•

Location:
Bangalore
•

Experience:
5.5–10 Years (preferably 6+ years)

Job Description
We are looking for an experienced Senior SDET / Test Automation Engineer with strong expertise in C#/.
NET automation, backend testing, API validation and payment processing systems. The ideal candidate should have hands-on experience in developing and maintaining automation frameworks and a solid understanding of the payment domain, particularly merchant acquiring, card transactions, chargebacks and risk management.

Key Responsibilities
& Required

Skills:
1. Test Automation & Technical Expertise
• 6+ years of experience in Test Automation / SDET roles, primarily focused on backend and server-side testing.
• Strong hands-on coding experience in C# / .
NET.
• Experience developing and maintaining automation frameworks using NUnit, MSTest or xUnit.
• Strong SQL Server expertise, including complex queries, stored procedures, transactions and data validation.
• Experience in REST API, web services and message-based testing.
• Exposure to Kafka, message queues, asynchronous processing and failure-scenario testing.
• Good understanding of Windows Server, services, event logs, configuration and troubleshooting.
• Experience with CI/CD pipelines using Azure DevOps/TFS, Jenkins or similar tools, along with Git. 2. Mandatory Payment Domain Experience
• Strong hands-on experience in the Payment Domain, preferably with companies such as PayPal, Worldpay, FIS, Fiserv,



Adyen or similar payment technology organizations.
• Good understanding of Merchant Acquiring and the four-party payment model (Merchant, Acquirer, Card Scheme and Issuer).
• Knowledge of the complete payment transaction lifecycle, including Authorization, Capture, Clearing, Settlement and Merchant Payout.
• Experience with Refunds, Reversals, Offline Transactions, Chargebacks and Dispute Management.
• Understanding of Interchange Fees, Scheme Fees, Merchant Pricing and Transaction Reconciliation.
• Experience working on acquiring or merchant-processing platforms. 3. Good to Have Skills
• Knowledge of payment protocols and formats such as ISO 8583, GICC, ZVT, EMV, girocard, Visa and Mastercard clearing formats (Base II / IPM).
• Experience with payment simulators, terminal simulators, host simulators, HSM simulators and test card sets.
• Ability to read and understand C++ code.
• Exposure to Java, Spring Boot and REST API automation tools such as REST Assured or Postman/Newman.
• Performance testing experience using JMeter, k6, Gatling or similar tools.
• Knowledge of banking file formats such as SEPA, camt and Mastercard IPM.
• Experience with Jira / Xray and regulated environments involving PCI DSS, BaFin or DORA.
• Exposure to AWS and infrastructure migrations.
• German language skills would be an added advantage. Important: Prior experience in the Payment Domain, particularly Merchant Acquiring / Card Payment Processing, is mandatory for this position.

📌 Software Engineer in Test (India)
🏢 NexionPro Services
📍 India