Manual Tester

Crayontek; Pune District; On-site; INR 1,200,000 - 2,000,000; Full time

Job summary

Crayontek in Pune, India seeks an experienced Manual QA Engineer to test complex payment processing applications, transaction flows, and backend systems. The role involves API testing, SQL data validation, and Linux/Unix proficiency to ensure high software quality, security, and performance.

The ideal candidate will have domain expertise in Payment Gateways/Fintech, hands-on API testing, SQL validation, and comfort with Linux environments.

Qualifications

• 36+ years of manual software testing experience.
• Minimum 2+ years of hands-on experience in Payment Gateways, Merchant Onboarding, E-Commerce Checkout, or Fintech applications.
• Strong command over testing REST APIs, JSON/XML payloads, authentication mechanisms (OAuth 2.0, API Keys, Bearer Tokens), and API mock testing.
• Strong knowledge of relational databases (MySQL, PostgreSQL, Oracle, or SQL Server) and writing complex SQL queries.
• Linux/Unix commands for log analysis, file manipulation, and navigation.
• Deep understanding of STLC, SDLC, test case design techniques, exploratory testing, and bug lifecycle management.
• Bachelor's degree in Computer Science, Information Technology, Software Engineering, or equivalent experience.

Responsibilities

• Payment Gateway & Domain Testing: Design, write, and execute end-to-end manual test cases for payment gateway integrations.
• Validate payment gateway transactions across multiple payment methods (Credit/Debit cards, Net Banking, Digital Wallets, UPI, Recurring Billing).
• Ensure compliance with payment industry standards (PCI-DSS, 3D Secure authentication).
• API & System Testing: Perform functional, negative, and edge-case testing of RESTful and SOAP APIs.
• Database & Data Validation: Execute SQL queries to validate backend data integrity, transaction logs, ledger balances, and audit trails.
• Linux & Server-Side Execution: Navigate Linux systems to inspect logs and monitor server health during test execution.
• Defect Management & Process Improvement: Report, track, and manage defects using Jira or Azure DevOps with detailed steps to reproduce.

Skills

Manual testing

Payment gateways

API testing

SQL

Linux/Unix

Defect tracking & Agile

Education

Bachelor's degree in CS/IT/SE

Tools

Jira

Azure DevOps

Postman

Insomnia

SoapUI

Job description

Job Summary

We are seeking an experienced and detail-oriented Manual QA Engineer to join our Quality Assurance team. In this role, you will be responsible for testing complex payment processing applications, transaction flows, and backend systems. You will work closely with developers, product managers, and system architects to ensure high software quality, security, and performance.

The ideal candidate has strong domain expertise in Payment Gateways / Fintech, proficiency in API testing, solid hands-on experience with SQL for database validation, and comfortable working within Linux/Unix environments.

Key Responsibilities

• Payment Gateway & Domain Testing:

  Design, write, and execute end-to-end manual test cases for payment

  gateway integrations, checkout flows, refund operations,

  authorization/capture cycles, and chargebacks.

  Validate payment gateway transactions across multiple payment methods

  (Credit/Debit cards, Net Banking, Digital Wallets, UPI, Recurring Billing).

  Ensure compliance with payment industry standards (e.g., PCI-DSS, 3D

  Secure authentication).

• API & System Testing:

  Perform functional, negative, and edge-case testing of RESTful and SOAP

  APIs using tools like Postman, Insomnia, or SoapUI.

  Verify API request/response payloads, HTTP status codes, headers, and error

  handling mechanisms.

• Database & Data Validation:

  Execute SQL queries (JOINs, subqueries, group functions) to validate backend

  data integrity, transaction logs, ledger balances, and audit trails.

  Compare UI/API data against database records to identify discrepancies.

• Linux & Server-Side Execution: Navigate Linux systems using shell commands to inspect application log files

  (e.g., grep, tail -f, awk) for troubleshooting issues and root cause analysis.

  Monitor system processes, microservices, and server health during test

  execution.

• Defect Management & Process Improvement:

  Report, track, and manage defects using tools like Jira or Azure DevOps with

  detailed steps to reproduce, logs, and screenshots.

  Participate in Agile/Scrum ceremonies (Sprint Planning, Daily Standups,

  Grooming, Retrospectives).

Required Qualifications & Skills

• Experience: 36+ years of manual software testing experience.
• Domain Knowledge: Minimum 2+ years of hands-on experience in Payment Gateways, Merchant Onboarding, E-Commerce Checkout, or Fintech applications.
• API Testing: Strong command over testing REST APIs, JSON/XML payloads, authentication mechanisms (OAuth 2.0, API Keys, Bearer Tokens), and API mock testing.
• SQL Skills: Strong knowledge of relational databases (MySQL, PostgreSQL, Oracle, or SQL Server) and writing complex SQL queries.
• Linux Expertise: Comfortable with basic-to-intermediate Linux/Unix commands for log analysis, file manipulation, and navigation.
• Core QA Competencies: Deep understanding of STLC, SDLC, test case design techniques, exploratory testing, and bug lifecycle management.
• Bachelor's degree in Computer Science, Information Technology, Software Engineering, or equivalent experience.