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As a Top Rated Freelancer with over a decade of experience, I build secure, scalable backend systems for SaaS products, eCommerce platforms, and custom business applications. My expertise is in PHP backend development, modern API architecture, and AI workflow automation that helps businesses automate processes, improve productivity, and scale efficiently. I specialize in developing robust applications with Laravel, Symfony, Yii, CodeIgniter, and Laminas (Zend), while also building backend services with Node.js and Go for high-performance applications. What I Offer ⚙️ Backend Development -PHP -Laravel -Symfony -Yii -CodeIgniter -Laminas (Zend) -REST API & GraphQL -Microservices -Authentication & Authorization -Database Design & Optimization -Payment Gateway Integration 🤖 AI Workflow Automation -OpenAI, Claude & Gemini Integration -AI Agents -Workflow Automation -Business Process Automation -Document Processing -AI Chatbots -Custom AI Applications -Internal AI Tools 🛒 eCommerce Development -WooCommerce -Magento -OpenCart -Custom eCommerce Platforms -Subscription Systems -Order & Inventory Management -Payment Processing -Shipping & Tax Integration 🔌 API & Third-Party Integrations -Stripe -PayPal -Twilio -SendGrid -Google APIs -CRM & ERP Integration -Custom REST & GraphQL APIs ☁️ Cloud & Infrastructure -AWS -Docker -GitHub Actions -Linux -Redis -MySQL -PostgreSQL -Performance Optimization Why Clients Work With Me I build backend systems that are reliable, secure, and easy to maintain. Whether you need a Laravel application, a custom backend, API integrations, an eCommerce platform, or AI-powered workflow automation, I deliver clean, production-ready solutions designed for long-term growth. With Top Rated status, 100% Job Success, and years of experience delivering successful projects, I focus on writing maintainable code, communicating clearly, and delivering on time. If you're looking for a Backend Developer, PHP Developer, Laravel Expert, or an AI Workflow Automation Engineer, I'd be happy to discuss your project. #CMS, #Wocoomerce, #Magento, #Joomla

With 15+ years of experience in extensive list of technologies, I am able to provide you with high quality, sophisticated, robust solutions that are well tested, efficient, accurate. I shine at diving into your existing codebase, find the source of issues, and resolve them without breaking another thing. If you have old legacy code, or a vibe coded program that is not working, I can fix them up for you to clean and conscious code. Need to automate? Got your back. Data processing, parsing complex PDF? Sure thing! You need it, if there is solution for it, I can get it done. Technologies I am currently working with: Rust, Python, Axum, SQLAlchemy, FastAPI, Django, PostgreSQL, SQLite, HTMX, ReactJS, Tailwindcss, RunPod, AI/LLM I am a passionate software engineer who enjoys challenges, and finding solutions. I have extensive experience of diving into existing code, finding issues, and resolve them. As a hardworking, resourceful engineer who also loves automating things, that usually saves a lot of time, I can provide the best service for the most reasonable costing. Besides developing data mining applications, automation tools, Websites, I have personal interest in Open Source projects. Here's a list of, but not limited to, responsibilities I have successfully fulfilled: ◾️ Desktop application ◾️ Refactoring ◾️ Prompt Engineering (Local LLM) ◾️ Machine Learning ◾️ Web development ◾️ Web Scrapers ◾️ Email processing ◾️ Distributed applications ◾️ ETL ◾️ Automation ◾️ Server configuration and deployments ◾️ Bug fixing and code improvements ◾️ High Performance computing Let's get in touch.

𝗕𝗶𝗼𝗺𝗲𝗱𝗶𝗰𝗮𝗹 𝗼𝗻𝘁𝗼𝗹𝗼𝗴𝘆 & 𝐆𝐫𝐚𝐩𝐡-𝐑𝐀𝐆 𝐍𝐞𝐨𝟒𝐣 | 𝗖𝘆𝗽𝗵𝗲𝗿 𝗔𝗴𝗲𝗻𝘁 | 𝗣𝗶𝗽𝗲𝗰𝗮𝘁 | 𝐀𝐳𝐮𝐫𝐞 𝐒𝐞𝐚𝐫𝐜𝐡 | 𝗥𝗮𝗴 𝗙𝘂𝘀𝗶𝗼𝗻 | 𝗥𝗲-𝗿𝗮𝗻𝗸𝗶𝗻𝗴 | 𝗦𝗲𝗺𝗮𝗻𝘁𝗶𝗰 𝗖𝗮𝗰𝗵𝗶𝗻𝗴 | 𝐋𝐚𝐭𝐞 𝐂𝐡𝐮𝐧𝐤𝐢𝐧𝐠 | 𝐓𝐨𝐆 (𝐓𝐡𝐢𝐧𝐤-𝐎𝐧-𝐆𝐫𝐚𝐩𝐡) | 𝗥𝗔𝗚 𝗘𝘃𝗮𝗹 | 𝐌𝐢𝐜𝐫𝐨𝐬𝐨𝐟𝐭 𝐆𝐫𝐚𝐩𝐡 𝐀𝐏𝐈 I specialize in developing RAG and AI Agent systems with 15+ years of full-stack experience using LangChain, LangGraph, FastAPI, and vector databases (Qdrant, Pinecone, FAISS etc). For data ingestion, I build end-to-end pipelines supporting multi-format sources (PDF, DOCX, CSV, Excel, websites), structured cleaning with spaCy, Textacy & CleanText, web scraping via Playwright, BeautifulSoup & Jina Reader, Overlap Late Chunking for retrieval accuracy, and Microsoft Graph API integration for SharePoint/OneDrive across Microsoft 365.I also build real-time Voice AI agents using Pipecat with full STT → LLM → TTS streaming pipelines. My retrieval expertise covers Re-ranking (Cohere, FlashRank, Jina), dense/sparse/hybrid search, RAG Fusion, Semantic Caching, contextual compression, custom output parsers, LLM Token tracing, and RAGAS-based evaluation. I am a 𝐍𝐞𝐨𝟒𝐣 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐏𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 specializing in Graph RAG, graph data modeling, Cypher queries, and domain ontology alignment. For graph ingestion, I have developed knowledge graph pipelines using GraphTransformers and NLP libraries for entity & relation extraction, aligned with domain-specific ontologies. For graph retrieval, I have implemented Graph Traversal, vector search, Think-On-Graph (ToG) reasoning, and Cypher Agents (generation, validation, correction, execution) leveraging LLMs for answers. Front End experience with TypeScript, Vue.js Composition API, Quasar Framework. I have a sharp eye for detail and quality and have experience of Software Reengineering. I am a self motivated individual who is both deadline focused and thorough in my approach to work. -------------------𝐏𝐫𝐨𝐯𝐞𝐧 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐋𝐋𝐌 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭------------------- 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐑𝐀𝐆 & 𝐑𝐞𝐭𝐫𝐢𝐞𝐯𝐚𝐥 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 • Implemented RAG with multiple data formats (PDF, DOCX, CSV, Excel, TXT, websites etc.) • Enhanced retrieval techniques using RAG Fusion with multiple re-rankers (Cohere, FlashRank, Jina) • Applied optimization strategies like Prompt Caching, Semantic Caching with vector databases • Context-aware chunking is implemented by "Overlap Late Chunking" to improve retrieval accuracy • Conducted RAG evaluations using RAGAS for quality assessment and benchmarking • Built structured web scraping and cleaning pipelines using Playwright, BeautifulSoup, Jina Reader, Textacy, CleanText, spaCy etc. • Implemented dense, sparse, and hybrid search for advanced similarity search and optimal retrieval • Implemented LLM Token Tracing for monitoring LLM cost per user • Implemented custom output parsers for specialized formatting • Integrated Microsoft Graph API to fetch and process data from SharePoint and OneDrive across Microsoft 365 𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐆𝐫𝐚𝐩𝐡 & 𝐆𝐫𝐚𝐩𝐡𝐑𝐀𝐆 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 • Built Neo4j GraphRAG system with Graph Traverse and vector search capabilities • Created knowledge graphs aligned with domain-specific ontologies including bio-medical Ontology, using transformers, custom logic and detailed instruction-based prompts. • Developed Cypher Agents with LangGraph for Cypher generation, validation, correction, and execution • MS GraphRAG solutions with LanceDB and Parquet files, search and Indexing ,incremental indexing. • Successfully migrated MS GraphRAG Parquet files to Neo4j (KG) database systems 𝐋𝐋𝐌 𝐀𝐠𝐞𝐧𝐭𝐬 & 𝐂𝐨𝐧𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐀𝐈 • Designed LangGraph Agent architectures for multi-step reasoning workflows • Built multi-agent systems with specialized roles • Applied advanced prompt engineering with few-shot learning and context window optimization • Developed real-time Voice AI agents using Pipecat for low-latency conversational interactions • Implemented streaming speech-to-text → LLM reasoning → text-to-speech pipelines 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • Backend Development: Python, FastAPI for scalable services • Vector Database Integration: Qdrant, Faiss, LanceDB for efficient similarity search • Hybrid Application Development: Cross-platform solutions with Quasar Framework • Mobile Application Development: Expertise with Capacitor and Electron frameworks 𝐂𝐨𝐫𝐞 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬: - 𝐀𝐈/𝐋𝐋𝐌: Langchain, LangGraph, LlamaIndex, OpenAI, Claude - 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: Neo4j, Qdrant, FAISS, LanceDB, Pinecone, Chroma - 𝐕𝐨𝐢𝐜𝐞 𝐀𝐈: Pipecat, Real-time Voice Agents, STT/TTS streaming pipelines - 𝐖𝐞𝐛 𝐂𝐫𝐚𝐰𝐥𝐢𝐧𝐠: FireCrawl, Jina, Puppeteer, Scrapy, Playwright, Beautiful Soup - 𝐃𝐨𝐜𝐮𝐦𝐞𝐧𝐭 𝐏𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠: Llama Parse, Document Loaders, spaCy, Textacy

Hello, Thank you for checking out my profile. Here is a quick overview of my skills & strengths, I am Software Architect well organized, dedicated, energetic, hardworking, efficient and self motivated. Education: I have Master in Software Engineering Degree and Bachelor in Computer Science & Information Technology( CSIT . Seeking for the challenging job from the reputed organization where I can use my skills, knowledge and experience for the company’s progress and benefit. Over the last 18 years, I have designed ERP, DFD, ERD, GUI, process modeling & developed a wide range of database software using Oracle database, Oracle Forms and Reports, Oracle Apex, BI Publisher, Power BI, SQL Server, MySQL, Postgres, FileMaker Pro in home and abroad. I am confident I would make a valuable and immediate contribution to your operations. My technical skill are as follows: Domain Competency : * 18+ years of HealthCare domain experience. * 12+ years of Pharmaceutical, Manufacturing, Supply Chain, and Financial domain experience. * 03+ years of Bank, Oil & Gas, Education, Association domain experience. * 01 + years of Trade, Digital Marketing, and Distribution domain experience. * 01 years of Real Estate Industry, Hotel, and Tourism domain experience. Technology Expertise: 01: Database Experience: Oracle Database7-11g R2,12C, 18c,19c, Autonomous database, Oracle Application Server10g, Developer suite 10g, Oracle Form/Report/Query Builder, Warehouse Builder 10g( ELT, ETL, Cube and Dimensions), Oracle Discoverer, Oracle BI Publisher Desktop, Oracle BI Publisher 10g,Oracle web logic, PL/SQL, Oracle XE 11g, MS SQL Server 2008, MySQL, Postgres, Filemaker pro, MS Access.5000+ Reports & pages development experience using Oracle, APEX, Oracle BI Publisher, Microsoft Power BI and Developer Suit. 02: Web Programming Language: Java Script, jQuery, Bootstrap, Ajax,VB Script, ASP,DHTML, Jasper- Crystal Report, HTML, XML,WML,CSS, JDeveloper 11g,ADF,Tomca,, Tomcat, PHP, WordPress, joomla, Oracle APEX 3,4,5 to APEX 21.1 03: Programming Language: C, C++, Java 04: Operating System: DOS, Windows Server, Red Hat Linux 05: Application Program: Ms Office, 360, MS Visio 2003, SmartDraw. TALLY, Quick Books, STAAD, TOAD,SPSS,STATISCA,Sage MAS,Arcview,Arc GIS,ProBank, PCbank,Wincor Nixford banking Software. Application Server.MS Project, Putty, FTP,UML. Balsamiq Mockups, Pencil, yFiles, ER/Studio. Trello, jira,p-tracker, Monday.com. 06: ERP: mPharma ERP, mhealthcare ERP, Oracle EBS, Openbravo, OpenERP, Orangehrm, 07: Hardware: Assembling, Troubleshooting, BIOS Setup, Server configuration(HP,DELL,IBM),Toshiba,Compaq,Dell,Asus Laptop Setup 08: Networking: Network Cabling, Device Setup, Protocol & Service Setup, Server Configuration-Domain Registration in Win NT Server 4.O, Windows Server 2000/2003. Network Troubleshooting, Network Maintenance, Proxy Server, Firewall, Switch, Router Configuration. 09: Cloud System: Oracle Cloud, Amazon Cloud-AWS, hostmonster.com Publication: 1) Cloud Application Development- Oracle Apex link are as follows rokomari dot com/book/207906/cloud-software-development-oracle-apex?fbclid=IwAR1Xfwqa8n9n3vK8OMp0g0B20C5eJSCmpFXR4gqCuRmyNlcuQNNui1zAPwY 2) Business Intelligence BI - Oracle BI Publisher, Microsoft Power BI rokomari dot com/book/268513/oracle-bi-publisher 3) Journal ijsecs.ump.edu. my/index. php/archive/17-v4/74-ijsecs-04-0044 4) //globaljournals. org/GJCST_Volume18/5-Rework-and-Reuse-Effects.pdf Membership: :Bangladesh Computer Society Membership ID: AM05212. Bangladesh Software Testing Board

Over the last 3 years, I have developed a wide range of Software and Mobile App using Apache Cassandra, Apache Solr, Apache Hadoop, Apache Spark, C, Java and Android. Now i am working for IPVision Canada Inc. as Big Data developer and I am seeking opportunities to build more App and Software. I also have some experience in the following areas: Shell Script, MySQL, SQLite, Regex, Python, PHP, OpenGL Glut, Game Developing and Software Testing

I build agentic AI systems that run in production. Not demos. Flagship client: Princess Cruises (Carnival Corp, Fortune 500) — sole AI architect across 17+ deployed ship environments. Platform 1: Multi-agent BDI operations assistant. Custom orchestration written from scratch — no framework wrappers. LLM planning, guardrails, human-in-the-loop approvals, self-hosted Ollama at the ship edge. Fully air-gap compatible. Platform 2: Fleet-wide agentic assistant. Hybrid-retrieval RAG with 34,369 Confluence pages indexed into ChromaDB. MCP tooling invoking 40+ microservices in real time. 15+ years of Java and Spring Boot across 40+ microservices in enterprise production. 100+ P1 incidents resolved — I know what breaks at scale and why. Most AI engineers are Python-only and treat your existing backend as a black box. I architect AI directly into enterprise Java infrastructure — agent tooling, RAG pipelines, and LLM orchestration integrated into the systems you already run. $400K+ earned on Upwork. Top Rated. 12,755 hours logged. I also run TechyOwls, my own AI SaaS studio — because I prefer shipping over advising. SnapForge — screenshot and agentic data extraction API. LangGraph-based. Live with paying customers. Isolate — AI image processing platform. Background removal, upscaling, virtual try-on, local vision LLMs. LLM Bridge — WireGuard-tunneled inference between VPS and home GPU. Enterprise-grade inference without cloud lock-in. Stack: LangGraph, LangChain, MCP, ReAct, BDI multi-agent, ChromaDB, pgvector, self-hosted Ollama, Llama 3.x Vision, Claude, OpenAI. Java, Spring Boot, Python, FastAPI, TypeScript. Docker, Kubernetes, Ansible, Prometheus, Grafana. Oracle, PostgreSQL, Redis, Kafka. WHAT YOU GET When you bring me in, you get someone who has already made the architecture decisions you're about to make — at Fortune 500 scale, under real compliance pressure, in production environments where failure costs money. I embed as technical lead alongside your existing team or execute independently — both at the same standard. System design, agent orchestration, RAG pipeline, security review, stakeholder communication. You focus on the product. I keep the AI from becoming a liability. WHERE I ADD THE MOST LEVERAGE Teams past the prototype stage that need production-grade AI — systems that survive security review, scale to real users, and run in regulated or air-gapped environments. Enterprise codebases where AI needs to integrate with existing Java/microservices infrastructure, not replace it. Currently accepting a limited number of long-term engagements. Fixed-scope architecture audits also available.