You will get Secure REST APIs or Scripts using Java Spring Boot
Project details
Project Summary Need a secure, high-performance backend without the bloat?
I specialize in developing lightweight Secure REST APIs and Automation Scripts using Java Spring Boot. Whether you need to expose your database to a mobile app, automate a data processing task, or build a secure backend for your website, I deliver clean, optimized code.
Unlike full-stack templates, my backend solutions are engineered for Security (OWASP standards) and Speed (Optimized SQL queries). I bring the experience of handling high-volume systems (320,000+ records) to your specific API needs.
What I can do for you:
Custom API Development: RESTful endpoints that connect to MySQL, PostgreSQL, or Oracle.
Automation Scripts: Java scripts to parse files (CSV/Excel), process data, or handle scheduled jobs (Spring Batch).
Bug Fixing: Debugging "500 Internal Server Errors," slow queries, or database connection issues.
Why Start Here? This catalog is designed for clients who need specific backend tasks completed quickly and correctly. No fluff, just working code.
Tags: CRUD, JSON, XML, Stripe API, Web Scraping, Postman, Maven, Gradle, Backend Developer, Third-Party Integration, Bug Fixes & Debugging.
I specialize in developing lightweight Secure REST APIs and Automation Scripts using Java Spring Boot. Whether you need to expose your database to a mobile app, automate a data processing task, or build a secure backend for your website, I deliver clean, optimized code.
Unlike full-stack templates, my backend solutions are engineered for Security (OWASP standards) and Speed (Optimized SQL queries). I bring the experience of handling high-volume systems (320,000+ records) to your specific API needs.
What I can do for you:
Custom API Development: RESTful endpoints that connect to MySQL, PostgreSQL, or Oracle.
Automation Scripts: Java scripts to parse files (CSV/Excel), process data, or handle scheduled jobs (Spring Batch).
Bug Fixing: Debugging "500 Internal Server Errors," slow queries, or database connection issues.
Why Start Here? This catalog is designed for clients who need specific backend tasks completed quickly and correctly. No fluff, just working code.
Tags: CRUD, JSON, XML, Stripe API, Web Scraping, Postman, Maven, Gradle, Backend Developer, Third-Party Integration, Bug Fixes & Debugging.
Programming Languages
HTML & CSS, Java, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$150
|
Advanced
$250
|
|---|---|---|---|
| Delivery Time | 2 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
+$30 - $100
Additional Revision
+$20
Swagger Documentation
(+ 1 Day)
+$50
Deploy to Server
(+ 3 Days)
+$100Frequently 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 - 6:26 am 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:
✅ 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.
✅ 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.
Requirements & Database Access
You provide the details of the data you need to process or the API endpoints you need (e.g., "User Login," "Get Products"). If DB access is required, you share credentials.
Development & Logic
I write the Java code using Spring Boot best practices, implementing the business logic and database connections (JPA/Hibernate).