Senior Performance & API Testing Engineer

About LJI

Loyalty Juggernaut (LJI) is a pioneer in cloud-native loyalty and customer engagement. We are THE JUGGERNAUTS, driving innovation and impact in the loyalty ecosystem. Our GRAVTY® platform is the world’s first autonomous loyalty solution, built for the next generation of digital-first enterprises.

Designed for limitless scalability and hyper-personalization, GRAVTY® delivers cutting-edge,AI driven loyalty solutions that transform customer engagement across diverse industries, including Airlines, Airports, Retail, Hospitality, Banking, Telecom, and Insurance.

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