You will get your slow, insecure Java Spring Boot APIs & SQL database queries optimized
Project details
Is your Spring Boot API slow? Are your Database queries timing out?
I specialize in Backend Performance Optimization. I don't just guess; I use data-driven profiling to pinpoint exactly why your application is lagging. With experience architecting systems that handle 320,000+ monthly invoices, I know how to make Java applications fly.
Why apps get slow: Often, the issue isn't Java itself—it's the Database Layer. I fix the "N+1 Select" problems, missing SQL indexes, and inefficient Hibernate mappings that kill your performance under load.
What I will do:
Audit & Profiling: Identify bottlenecks using logs and query analysis.
Query Optimization: Rewrite slow SQL/HQL queries and add necessary Indexes.
Code Refactoring: Optimize loops, remove blocking code, and implement asynchronous processing (CompletableFuture) where needed.
Stop losing users to loading screens. Let's make your backend secure, scalable, and sub-second fast.
Tags: MySQL, PostgreSQL, Oracle SQL, Database Optimization, Fix Slow API, Speed Up Website, Debugging, SQL Tuning, Server Performance, Latency Reduction, AWS RDS, Spring Boot Error, Load Testing, Code Review, Backend Maintenance.
I specialize in Backend Performance Optimization. I don't just guess; I use data-driven profiling to pinpoint exactly why your application is lagging. With experience architecting systems that handle 320,000+ monthly invoices, I know how to make Java applications fly.
Why apps get slow: Often, the issue isn't Java itself—it's the Database Layer. I fix the "N+1 Select" problems, missing SQL indexes, and inefficient Hibernate mappings that kill your performance under load.
What I will do:
Audit & Profiling: Identify bottlenecks using logs and query analysis.
Query Optimization: Rewrite slow SQL/HQL queries and add necessary Indexes.
Code Refactoring: Optimize loops, remove blocking code, and implement asynchronous processing (CompletableFuture) where needed.
Stop losing users to loading screens. Let's make your backend secure, scalable, and sub-second fast.
Tags: MySQL, PostgreSQL, Oracle SQL, Database Optimization, Fix Slow API, Speed Up Website, Debugging, SQL Tuning, Server Performance, Latency Reduction, AWS RDS, Spring Boot Error, Load Testing, Code Review, Backend Maintenance.
Programming Languages
HTML & CSS, JavaScript, JavaCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$120
|
Advanced
$250
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $75
Additional Revision
+$30Frequently asked questions
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JM
Jess M.
May 31, 2026
Looking for Software Developers: Interview Study on Handling Software Supply Chain Threats
Md Fakhrul brought a high level of software supply chain knowledge to the interview. He answered with detailed insights from his experience with securing software systems. Thank you for contributing your expert perspective to our study!
CA
Chaima A.
May 8, 2026
Research Study – Open Source Contributions
Working with Md Fakhrul was a great experience. He was very professional and helped me conduct my user study by providing meaningful insights and valuable feedback. Communication was smooth, and his contributions were very helpful throughout the process. I would definitely recommend working with him!
About Md Fakhrul
AI Solutions Engineer | Voice AI, RAG, Full Stack SaaS
100%
Job Success
Dhaka, Bangladesh - 2:25 pm local time
As a professional software engineer with 4+ years of experience, I don't just write code; I architect complete systems from strategy to deployment. Whether you need an intelligent voice agent to qualify leads, an n8n automation that books appointments while you sleep, a chatbot that safely queries your company data, or full workflow automation—I deliver production-ready solutions, not fragile prototypes.
Are your leads slipping through the cracks? Spending hours on tasks that should run themselves? I help businesses turn AI into revenue and operational efficiency, not just tech experiments.
🚀 What I Build:
🎙️ Voice AI Agents & Call Automation
Conversational voice agents using RAG, ElevenLabs, WebSockets, and real-time LLMs.
Inbound AI receptionists for support triage and outbound agents for lead qualification.
Natural speech pipelines with sub-second latency.
🤖 AI Agents & RAG Systems
Intelligent text chatbots that answer accurately from your company documents (zero hallucinations).
Autonomous multi-agent systems (LangChain / LangGraph) capable of complex reasoning, routing, and tool execution.
⚡ Workflow & Business Automation
AI-powered lead qualification, scoring, and auto-booking pipelines (n8n + Gemini).
End-to-end CRM workflows: lead intake → AI enrichment → scoring → outreach → alerts.
Missed call → AI response → Google Calendar booking in under 45 seconds.
Custom integrations: Google Workspace, Discord, Slack, Twilio, CRM APIs, LLM APIs.
🏗️ Full Stack SaaS & Backend Systems
End-to-end platform development: robust Python (FastAPI) or Java (Spring Boot) backends.
Custom dashboards (React/TypeScript) to monitor and manage your AI systems.
🌟 Why Clients Choose Me:
âś… ROI & Outcome Focused: I design systems to increase conversion, reduce operational load, and generate actual ROI.
✅ End-to-End Ownership: I don't hand off half-built prototypes. I deliver working systems in production—Backend, Frontend, and AI Integration—with complete delivery.
âś… Enterprise-Grade Reliability: Building and managing fault-tolerant pipelines in the healthcare tech sector, I know how to build systems that scale safely and reliably.
✅ Verifiable Quality: I build to enterprise standards — my open-source platform SupportForge has 1,000+ automated tests and production-grade voice streaming. Open source contributor at The Apache Foundation.
✅ Proven Automation Results: My portfolio workflows process leads, score them via AI, and auto-book appointments — 67% qualification rate, $0 monthly operating cost.
🛠️ Tech Stack:
🔹 AI & Voice: LangGraph, LangChain, RAG, ChromaDB, ElevenLabs, OpenAI, Claude, Gemini, Local LLMs
🔹 Automation: n8n, Zapier, Playwright, Make
🔹 Backend: Python (FastAPI), Java (Spring Boot), PostgreSQL, Redis, Kafka
🔹 Frontend & Infra: React, TypeScript, Docker, AWS, Nginx
Let's build a system that works while you don't have to.
Message me with your use case — I'll reply with a clear roadmap, not a generic pitch.
Steps for completing your project
After purchasing the project, send requirements so Md Fakhrul can start the project.
Delivery time starts when Md Fakhrul receives requirements from you.
Md Fakhrul works on your project following the steps below.
Revisions may occur after the delivery date.
Access & Reproduction
You provide access to the code (Git) and describe the specific slow action (e.g., "The search page takes 10 seconds").
Diagnosis & Benchmarking
I run the application locally or in a staging environment to reproduce the slowness. I measure the current time to establish a baseline.