Backend and integration rescue
Fix Slow or Unreliable Spring Boot APIs
I investigate contained production issues in existing Spring Boot systems, including API latency, Hibernate queries, transaction behaviour, Redis caching, duplicate processing and unreliable background jobs.
Fixed-scope engagements generally start at ₹30,000.
I work on existing systems with a clearly identifiable technical problem. I do not currently take complete application builds, staff-augmentation roles or ongoing production support.
Symptoms
Signals that the issue is contained
- API latency increased without an obvious cause
- Hibernate generates unexpectedly expensive queries
- Transactions commit or roll back incorrectly
- Scheduled jobs run more than once
- Redis returns stale or inconsistent values
- Third-party integrations fail intermittently
- Connection pools become exhausted
- An issue only appears under production traffic
What you receive
A fixed deliverable set
- Reproduction or diagnostic findings
- Root-cause explanation
- Code changes
- Automated tests
- Performance comparison where applicable
- Deployment and rollback instructions
What is excluded
Clear boundary lines
- Rewriting the entire service
- Being added as a general team member
- Indefinite production monitoring
- Fixing unrelated problems discovered during investigation
FAQ
Questions buyers usually ask
Why is my Spring Boot API suddenly slow?
Usually because of query changes, cache misses, connection pool contention, thread starvation or heavier request paths.
Can Hibernate cause database performance problems?
Yes. I look for expensive joins, N+1 patterns, lazy loading issues, missing indexes and repeated queries.
How do you diagnose duplicate background jobs?
By tracing scheduling, retry paths, idempotency gaps, locks and the exact processing boundary.
Can you investigate an issue without production access?
Yes, if logs, staging and the relevant code paths are enough to reproduce or reason about the failure.
Do you work with existing development teams?
Yes, if the issue is contained and ownership is clear.
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Check fit before you submit
If you are deciding whether this is the right kind of engagement, review the case studies and about page, then submit the current behaviour and expected behaviour.