You will get Java Production Issue Diagnosis & Fix
Project details
This service focuses on rapid, production-safe diagnosis and remediation of Java runtime issues. For the Starter tier, I perform a single-JVM forensic: collect thread dumps, heap dumps, GC logs, and CPU profiles; produce a clear root cause and actionable fix (code hotspot, memory leak patch suggestion, GC parameter changes, or resource tuning).
The Standard and Advanced tiers extend this to distributed systems: I correlate traces and logs across services, analyze cross-service call patterns, tune sampling/trace configuration (SkyWalking), and implement configuration and deployment changes (resource requests/limits, GC tuning, thread pool caps, circuit breakers). For implementation, I prefer changes via manifests/Helm and perform staged rollouts with rollback plans.
Deliverables: prioritized findings, remediation manifests/patches, verification logs, and an operational root cause analysis document. Not included: full application refactor or long-term bug fix development (available as follow-up hourly/retainer work). I require at least one point of contact and a confirmed rollback plan before making any live changes.
The Standard and Advanced tiers extend this to distributed systems: I correlate traces and logs across services, analyze cross-service call patterns, tune sampling/trace configuration (SkyWalking), and implement configuration and deployment changes (resource requests/limits, GC tuning, thread pool caps, circuit breakers). For implementation, I prefer changes via manifests/Helm and perform staged rollouts with rollback plans.
Deliverables: prioritized findings, remediation manifests/patches, verification logs, and an operational root cause analysis document. Not included: full application refactor or long-term bug fix development (available as follow-up hourly/retainer work). I require at least one point of contact and a confirmed rollback plan before making any live changes.
Programming Languages
JavaCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$150
|
Standard
$500
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 8 days |
Number of Revisions | 1 | 1 | 2 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments | - | - | - |
About SIWEI
Senior Java Architect | Spring Boot | Cloud-Native | DevOps
Guangzhou, China - 6:30 am local time
I specialize in designing systems that handle high concurrency, large data volumes, and production reliability — not just making systems work, but making them stable, maintainable, and scalable.
Core expertise includes:
✔ Java / JVM — Spring Boot, Spring MVC, JVM diagnostics, GC tuning, performance troubleshooting
✔ Backend Architecture — Microservices, API design, distributed systems, rate limiting, circuit breakers
✔ Messaging & Data — Kafka, RabbitMQ, Redis, MySQL optimization, indexing, sharding
✔ Production Troubleshooting — CPU spikes, OOMs, thread dumps, flamegraphs, live incident diagnosis
✔ Observability — Apache SkyWalking, distributed tracing, monitoring, root cause analysis
✔ Cloud-Native & DevOps — Docker, Kubernetes (CKA-level), Helm, Jenkins, GitLab CI/CD, Terraform
✔ AWS & Infrastructure — EKS, EC2, RDS, IAM, deployment automation and platform engineering
Highlights:
• Designed systems serving 100M+ daily PV with peak TPS above 5,000
• Led Apache SkyWalking rollout across 1,500+ services, reducing failure diagnosis from hours to minutes
• Built and operated a DevOps platform supporting 2,500+ microservices and 800+ engineers
I deliver production-ready backend solutions, architecture guidance, and hands-on troubleshooting for complex distributed systems.
🚀 If you need DevOps automation, Kubernetes optimization, or AWS cloud architecture — let’s talk.
⏰ Availability: UTC+8, 9:00–18:00. I can adjust my schedule and attend late-evening meetings to collaborate with US/EU clients.
Steps for completing your project
After purchasing the project, send requirements so SIWEI can start the project.
Delivery time starts when SIWEI receives requirements from you.
SIWEI works on your project following the steps below.
Revisions may occur after the delivery date.
Intake & safe-mode plan
Confirm scope, required artifacts, maintenance window, backup/rollback plan, and access method (you run script or provide credentials).
Collect artifacts & non-invasive scans
Collect logs, metrics, thread dumps, heap dumps, jstack/jmap outputs, and profiling snapshots (async-profiler), plus service topology.