Backend and integration consultant based in India
About Sujnesh Mishra
I work on existing backend and integration systems that have one clearly identifiable technical problem. My work usually involves Spring Boot, PostgreSQL, Redis, background jobs, Razorpay, webhooks and production debugging.
What I focus on
- Contained backend failures with a narrow scope.
- Payment-state, webhook and message-delivery issues.
- Performance, locking, retries, idempotency and job reliability.
- Tests, handover notes and implementation details that reduce repeat failures.
Boundaries
I do not currently take complete application builds, staff-augmentation roles or ongoing production support. If the problem is broad, unbounded or missing source-code access, it is not a fit.
Fixed-scope engagements generally start at ₹30,000.
Next steps
Read the service pages
If your issue is clearly about backend performance, payment-state handling or WhatsApp Cloud API integration, read the relevant service page first.
Spring Boot Backend Rescue
APIs that are slow, transaction-heavy or unreliable under production traffic.
View serviceWhatsApp Cloud API Fix
Webhook verification, production setup and inbound message delivery.
View serviceWork with me
If it fits, submit the problem
Share the symptoms, stack and expected behaviour. I will only respond if the issue is contained enough for a fixed-scope engagement.