Performance Engineering
Optimizing API performance, backend responsiveness, and database query executions to support product growth and control Infra spend.
RefactorQ - We don't just write code, we craft the solution.
The Challenge
The customer is a product development company and had ~150 API's which were underperforming. Additionally, infrastructure costs for a very small customer base were too high.
The customer wanted to optimize API performance as well as infrastructure cost through effective and targeted performance testing and application tuning.
Our Approach
RefactorQ team helped the customer with setting up Performance Driven Development using best practices and tooling:
Conducted production analysis to identify and define critical Non-Functional Requirements (NFR) and business transactions
Analysed MongoDB performance issues and provided optimization recommendations for indexing and query structures
Identified major architectural gaps in implementation which directly helped to optimize overall application performance
Provided technical guidance in terms of what and how to choose specific backend technologies
Collaborated closely with engineering teams to build a performance-first approach in daily development workflows
Leveraged our self-service performance framework (RefactorQ product) for end-to-end performance testing
Achieved cost savings with APM tooling by recommending and implementing infrastructure best practices
Architecture & Workflow
System Flow
150 Underperforming APIs
MongoDB Tuning
Query & Indexing
API Optimization
Analyzing API response timelines and MongoDB queries to isolate architectural lags and optimize data pipelines.
Impact
Infrastructure Tuning
Reduced monthly cloud compute spend for small scale customer cohorts.
150 APIs Optimized
Significantly shortened overall transaction response latencies.
Performance First
Established an automated, self-service testing framework in the team.
Performance Engineering & SRE
Systematically profile application runtimes, tune database queries, eliminate memory leaks, and stress-test high-concurrency systems.