Senior Performance & API Testing Engineer

About LJI

Loyalty Juggernaut (LJI) is a leading B2B SaaS company redefining how enterprises drive customer engagement and loyalty. Our flagship platform, GRAVTY®, enables global brands to transform loyalty programs into measurable, revenue-generating growth engines.
Built as an AI-first, next-generation solution, GRAVTY® empowers organizations to deliver highly personalized, real-time experiences at scale—helping them increase customer lifetime value and deepen brand relationships.
Headquartered in Palo Alto, California, LJI partners with leading enterprises across 16 major industries including airlines, retail, hospitality, financial services and telecommunications powering some of the most innovative loyalty ecosystems worldwide.

Our Global Impact:

• 400+ Million members connected through our platform.
• 100+ Global Brands trust us to drive loyalty and brand devotion.
• 3-Time Winner of “Best Technology Innovation in Loyalty”.
• Global recognitions for Excellence in Loyalty Management under numerous categories.
• Recognised as a ‘Strong performer’ in The Forrester Wave™ Loyalty Platforms, Q4 2025.
  
  Explore more about us at www.lji.io

Role Overview
We are looking for a Senior Performance & API Testing Engineer to ensure our SaaS platform is scalable, reliable, and high-performing.
This role is beyond execution - you will run tests, monitor systems, derive insights, and recommend actionable improvements to engineering teams.

Key Responsibilities

• Design and execute performance tests using JMeter or similar tools
• Simulate real-world workloads and monitor system performance (latency, throughput, resource usage)
• Analyze results, identify bottlenecks, and suggest improvements to Dev teams
• Perform API testing using Postman and automation tools
• Build and maintain API test suites and integrate with CI/CD pipelines
• Improve API coverage including edge cases and negative scenarios
• Collaborate with Dev, QA, and DevOps teams for performance tuning and issue resolution

SME Expectations

• Act as a go-to person for performance and API testing
• Provide clear insights, not just reports
• Suggest practical improvements for performance and API reliability
• Bring new ideas to enhance API testing coverage and effectiveness

Basic Qualifications

• B.Tech / B.E. in Computer Science or IT (mandatory)
• Strong proficiency in Java (mandatory)
• 4–6 years of experience in Performance Testing and API Testing

Core Skills

• Hands-on experience with JMeter
• Strong experience in API testing using Postman
• Good understanding of REST APIs and microservices
• Ability to analyze performance metrics and identify issues
• Basic scripting/automation experience (Java/JS/Python)
• Familiarity with CI/CD tools
• Experience in SaaS or cloud environments

What We’re Looking For

• Someone who runs tests and explains what they mean
• Ability to identify problems and suggest fixes
• Practical, hands-on approach with ownership mindset