Application Performance
That Scales
Slow software loses customers. performance.qa is a specialist APM and performance optimization consultancy that profiles, tunes, and benchmarks your stack until every millisecond counts. We don't just find bottlenecks — we eliminate them.
Performance Engineering. Not Guesswork.
Root Cause, Not Symptoms
Slow response times are a symptom. The root cause is a missing database index, an N+1 query, a synchronous call that should be async, or a memory leak. We find the actual bottleneck, not just the metric that's red.
Full-Stack Profiling
Frontend, backend, database, infrastructure — performance problems cross layers. We profile the entire request path from browser to database and back, identifying exactly where time is spent.
Measured Before and After
Every optimisation ships with measured proof. P50, P95, P99 latency before and after. Throughput before and after. Core Web Vitals before and after. The improvement is a number, not a feeling.
Production Profiling Expertise
Staging numbers lie. We profile production workloads using low-overhead tools — continuous profiling, eBPF-based tracing, and sampling approaches that give production-accurate data with less than 1% overhead.
Diagnose. Optimise. Measure.
Every service follows the same pattern: measure current performance with production data, identify root cause, implement the fix, and measure the improvement.
Performance Audit
3-day full-stack performance baseline — frontend, backend, database, and infrastructure profiling with a prioritised optimisation roadmap.
Learn more →Backend Optimisation Sprint
5-day targeted optimisation of your API and backend — N+1 queries, synchronous bottlenecks, memory leaks, serialisation overhead, and connection pool tuning.
Learn more →Database Performance Tuning
Query analysis, index strategy, connection pooling, replication lag, and configuration tuning for PostgreSQL, MySQL, and MongoDB.
Learn more →Frontend Performance Sprint
Core Web Vitals optimisation — LCP, INP, and CLS fixes, bundle size reduction, rendering pipeline optimisation, and image/asset delivery tuning.
Learn more →API Performance Optimisation
API latency reduction — endpoint profiling, payload optimisation, caching strategy, rate limiting tuning for REST, GraphQL, and gRPC APIs.
Learn more →Continuous Profiling Setup
Production-safe continuous profiling — always-on CPU, memory, and allocation profiling with less than 1% overhead, catching regressions before users do.
Learn more →Performance Engineering Retainer
Ongoing performance engineering — monthly profiling, regression detection, optimisation sprints, and performance budgets — making performance a practice.
Learn more →Industries We Serve
Performance engineering applies everywhere speed matters — but some sectors feel every millisecond more than others.
SaaS Platforms
Performance optimization for multi-tenant SaaS applications where response time directly affects user retention, NPS scores, and competitive positioning.
See more →Fintech & Trading
Latency optimization for financial applications where milliseconds affect trade execution, payment processing speed, and regulatory compliance.
See more →E-Commerce
Conversion-focused performance optimization - every 100ms of latency reduction increases conversion rates, and every CWV improvement boosts Google ranking.
See more →Developer Tools & APIs
API performance engineering for developer-facing products where latency and reliability directly affect developer adoption, satisfaction, and churn.
See more →Healthcare & Telehealth
Performance optimization for clinical applications, EHR integrations, and telehealth platforms where slow response times affect care delivery.
See more →From the Blog
Performance engineering field notes — real data, no vendor pitches.
Your P99 Deserves Better
Book a free 30-minute performance scope call with our engineers. We review your latency profile, identify the most impactful optimization target, and scope a sprint to fix it.
Talk to an Expert