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I help startups and SaaS businesses build scalable backend systems, API integrations, workflow automation, and AI-powered applications that work reliably in production. Over the past 12+ years, I have developed SaaS platforms, fintech applications, eCommerce systems, automation platforms, and business-critical backend services. ━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS HIRE ME ✓ 12+ Years Software Development Experience ✓ Built Systems Processing 1M+ Webhook Events Per Month ✓ SaaS, Fintech, eCommerce & Business Automation Experience ✓ Stripe, Twilio, OpenAI, Google & Third-Party API Integrations ✓ Laravel, Node.js, PostgreSQL, Redis & AWS ✓ Production-Ready Solutions Focused On Reliability & Scale ━━━━━━━━━━━━━━━━━━━━ CORE EXPERTISE • SaaS Development • Backend Development • API Integration • Workflow Automation • AI-Powered Applications • Stripe & Payment Systems • OpenAI Integration • Laravel & Node.js Development ━━━━━━━━━━━━━━━━━━━━ SERVICES SAAS DEVELOPMENT • Multi-Tenant SaaS Platforms • MVP Development • Subscription & Billing Systems • Authentication & User Management • SaaS Architecture • Product Scaling API INTEGRATION & AUTOMATION • Stripe API Integration • Twilio API Integration • OpenAI API Integration • Google API Integration • OAuth2 Authentication • Webhook Development • Third-Party API Integration • CRM Integration • Workflow Automation AI AUTOMATION • OpenAI-Powered Applications • AI Workflow Automation • OCR & Document Processing • AI Features For SaaS Products BACKEND DEVELOPMENT • Laravel Development • Node.js Development • NestJS Development • Express.js Development • Event-Driven Architecture • Web Development • Queue Processing Systems • Performance Optimization ━━━━━━━━━━━━━━━━━━━━ SELECTED EXPERIENCE ✓ Built backend automation platforms processing over 1M+ webhook events monthly ✓ Developed scalable API integration systems connecting multiple business platforms ✓ Built SaaS applications with subscription billing and payment automation ✓ Designed event-driven architectures for high-volume transaction processing ✓ Delivered workflow automation systems reducing manual business operations ✓ Performed architecture reviews, security assessments, and production-readiness evaluations ━━━━━━━━━━━━━━━━━━━━ TECH STACK Laravel • PHP • Node.js • NestJS • Express.js • TypeScript PostgreSQL • MySQL • Redis • MongoDB • Supabase Stripe • Twilio • OpenAI • Google APIs • OAuth2 • Webhooks AWS • Docker • CI/CD • Git • Microservices ━━━━━━━━━━━━━━━━━━━━ LET'S TALK Whether you're building a new SaaS product, improving an existing platform, integrating third-party services, or adding AI-powered automation, I'd be happy to discuss your project. Send me a message with your goals and requirements, and I'll help identify the most practical technical approach for your business.

Salesforce Architect | ERP & CRM Integration Specialist LLM Engineer | Generative AI | RAG | AI Agents I am a senior software engineer and AI integration specialist with 20+ years of experience delivering enterprise-grade software solutions, CRM/ERP implementations, cloud integrations, and AI-powered automation systems for global businesses. My expertise combines modern AI technologies with deep enterprise application experience, helping companies automate workflows, improve operational efficiency, and build scalable digital solutions. Over the years, I have worked extensively with Salesforce CRM, ERP platforms, enterprise databases, cloud infrastructure, data engineering, and business intelligence systems. Recently, I have focused heavily on Generative AI, LLM integration, Retrieval-Augmented Generation (RAG), AI agents, workflow automation, and AI-powered business systems. I specialize in building intelligent systems that connect OpenAI, LLMs, automation tools, APIs, CRM platforms, ERP systems, and enterprise applications into seamless business solutions. ━━━━━━━━━━━━━━━ 🚀 Core Expertise ━━━━━━━━━━━━━━━ ✔ Generative AI & LLM Engineering • OpenAI, GPT, Claude, Gemini integrations • RAG (Retrieval-Augmented Generation) • AI Agents & Autonomous Workflows • LoRA Fine-Tuning • AI Chatbots & AI Assistants • Prompt Engineering • AI Automation & Orchestration • Vector Databases & Embeddings • AI Integration with CRM & ERP systems ✔ Salesforce CRM Development & Architecture • Apex Development • Lightning Web Components (LWC) • Visualforce • Salesforce Flows & Automation • REST/SOAP API Integrations • Sales Cloud & Service Cloud • Salesforce CPQ • Security & Permission Models • Reports & Dashboards • Einstein AI Integration • Multi-system Integrations ✔ ERP & Enterprise Application Development • ERPNext / Frappe Framework • Workflow Automation • Business Process Optimization • Custom ERP Modules • API & Webhook Integration • Enterprise Data Synchronization ✔ Full Stack & Enterprise Development • Python, PHP, Laravel, CodeIgniter • JavaScript, ReactJS, Angular • ASP.NET, VB.NET, C# • REST APIs & Microservices • Kafka, TIBCO, Mulesoft • WebLogic & Enterprise Middleware ✔ Data Engineering & Business Intelligence • SQL, PL/SQL, PostgreSQL, T-SQL • Oracle Database Development • Google BigQuery • Azure & AWS Cloud Platforms • ETL Pipelines & Data Warehousing • SSIS, Informatica, Oracle Warehouse Builder • Power BI, SSRS, Crystal Reports • IBM Cognos Analytics ━━━━━━━━━━━━━━━ 🏆 Professional Highlights ━━━━━━━━━━━━━━━ • 20+ years of enterprise software development experience • 10+ years of Salesforce CRM implementation expertise • 21,000+ hours of successful project delivery • Delivered solutions for clients across USA, EU, Middle East, and APAC • Built AI-powered workflow automation systems for enterprise operations • Helped businesses reduce manual work, improve data visibility, and increase operational efficiency • Extensive experience in integrating AI with CRM, ERP, and enterprise ecosystems ━━━━━━━━━━━━━━━ 🎓 Salesforce Certifications ━━━━━━━━━━━━━━━ • Salesforce Certified Application Architect • Salesforce Certified Data Architect • Salesforce Certified Sharing and Visibility Designer • Salesforce Certified Administrator • Salesforce Certified Platform Developer I • Salesforce Certified Platform App Builder ━━━━━━━━━━━━━━━ 💼 What I Help Businesses Achieve ━━━━━━━━━━━━━━━ ✔ Intelligent AI-powered automation ✔ Faster and more efficient workflows ✔ CRM and ERP optimization ✔ Enterprise system integrations ✔ Better business insights through analytics ✔ Reduced manual operations ✔ Scalable and secure cloud solutions ✔ AI-enhanced customer engagement ━━━━━━━━━━━━━━━ 🤝 Why Clients Work With Me ━━━━━━━━━━━━━━━ • Strong combination of AI + Enterprise Software expertise • Deep understanding of business operations and automation • Reliable communication and fast delivery • Proven experience in large-scale enterprise systems • Focus on long-term scalable solutions • Ability to bridge technical implementation with business goals I am passionate about helping businesses modernize their operations using AI, automation, Salesforce, and enterprise technologies. If you are looking for an experienced AI engineer, Salesforce expert, ERP specialist, or enterprise integration consultant who can deliver reliable and scalable solutions, I would be happy to collaborate with you.

✳"Better bookkeeping, Better decisions" 🔝 Top Rated Bookkeeper ✳ 4+ Years Hands-on Experience ✳ AI-Powered Bookkeeper Hey there! Are you seeking a reliable professional for your Bookkeeping needs? Look no further ! I specialize in providing comprehensive services to ensure your financial records, up-to-date, and compliant with industry standards. I OFFER SERVICES : ✔Bank Reconciliation ✔Clean-up Books ✔Payroll Processing ✔Accounts Receivable (A/R) Management ✔Accounts Payable (A/P) Management ✔Inventory Management ✔Detailed Financial Statements ✔Multi Currency Handling ✔Marketplace Integration ✔Payment Platform Integration ✔ 1099s fillings ( 1099 NEC & 1099-MISC) via QuickBooks Extensive Knowledge in Using ACCOUNTING Software: ✅QuickBooks Online (QBO) ✅ Puzzle .io ✅Xero ✅ Digits. com ✅ Keeper ✅Wave ✅FreshBooks ✅Zoho Books Certified Software User for E-commerce Bookkeeping Automation: 🟡 A2X 🟡 Synder 🟡 Bookkeep I SPECIALIZED in: ☑ E-commerce Bookkeeping (Amazon,Shopify, eBay, Walmart, Etsy, Squarespace) ☑ Amazon FBA Sellers ☑ E-commerce Cleaning up Bookkeeping ☑ E-commerce Bookkeeping Automation ☑ Amazon, Shopify integration with QBO/Xero through A2X/Synder/Bookkeep ☑ SaaS Bookkeeping ☑ Digital Marketing Agencies ☑ Retail Business ☑ Real Estate Bookkeeping ☑ Short-Term Rental (STR) Property Management (Gusty-OwnerRez) ☑ Professional Services Bookkeeping ☑ Beauty Salon Bookkeeping ☑ Restaurant & Hotel Bookkeeping ☑ Construction Bookkeeping ☑ Travel / Hospitality Bookkeeping ☑ Start-up Company Bookkeeping ☑ Clean Up & Catch Up Bookkeeping ☑ Non-Profit Organization Bookkeeping ☑ Bookkeeping in Excel & Google Sheets ☑ Consulting or Giving Advice for Small Businesses ☑ Accounts Receivable & Accounts Payable Management Familiarity with: 🟢Slack 🟢Click Up 🟢Discord 🟢Google Meet 🟢Zoom Kind Regards Fahim Bhuiyan.

Top Rated Plus Bookkeeper | QuickBooks & A2X Expert I will be your clean up catch up specialist and reconciliation wizard in Quickbooks Online, Xero, A2X, Synder Bookkeeping. I am Top Rated Plus expert bookkeeper with 5 years of experience worked with over 200 clients in USA, Canada, UK and Australia. I am Quickbooks and Xero pro advisor. My service included but not limited to: 1. Bookkeeping, Clean up, Catch up and reconciliation - Quickbooks Online - Xero - Wave 2. Payment Platform Integration with QBO and Xero: - Paypal - Stripe - Square - Clearpay - Klarna - Clover - GoCardLess 3. Marketplace Integration with QBO and Xero by Synder , A2X - Amazon - Shopify - Ebay - Etsy - Walmart - Woocommerce 4. Payroll: - Quickbooks - Xero - Gusto - ADP-Natpay 5. Multi-currency : - Wise - Paypal - Stripe

💼 QuickBooks Online Cleanup & Bank Reconciliation Specialist | Full‑Service Bookkeeping Across Industries 💼 I provide Quickbooks Online bookkeeping, QuickBooks cleanup, Quickbooks catch up, and bank reconciliation services for businesses across industries including real estate bookkeeping, ecommerce bookkeeping, restaurant bookkeeping, trucking bookkeeping, construction bookkeeping, healthcare bookkeeping, law firm bookkeeping, nonprofit bookkeeping, and startup bookkeeping. My focus is restoring accuracy, eliminating backlog, and delivering tax‑ready financials with reconciled accounts and clean ledgers. 🔹 QuickBooks Cleanup & Catch Up QuickBooks Cleanup and catch‑up bookkeeping solve the pain points of outdated, messy, or incomplete records. I deliver: ✦ Historical quickbooks cleanup: backlog reconciliation, duplicate transaction removal, error correction, and chart of accounts optimization. ✦ Quickbooks Catch up bookkeeping: bringing accounts current, fixing uncategorized transactions, and aligning balances with bank statements. ✦ Industry‑specific Quickbooks cleanup: Airbnb bookkeeping cleanup, Amazon FBA bookkeeping cleanup, Shopify bookkeeping cleanup, Stripe bookkeeping cleanup, PayPal bookkeeping cleanup, Etsy bookkeeping cleanup, property management bookkeeping cleanup, medical practice bookkeeping cleanup, nonprofit bookkeeping cleanup. ✦ Year‑end cleanup: preparing books for tax filing, adjusting retained earnings, and reconciling prior year balances. ✦ Multi‑year catch up bookkeeping: restoring accuracy for businesses with several years of backlog. 🔹 Bank & Credit Card Reconciliation Bank reconciliation is the backbone of accurate bookkeeping. I provide: ✦ Bank reconciliation: matching deposits, withdrawals, and transfers with QuickBooks Online records. ✦ Credit card reconciliation: aligning merchant transactions, card charges, and payments with statements. ✦ Merchant reconciliation: PayPal reconciliation, Stripe reconciliation, Square reconciliation, Shopify reconciliation, Etsy reconciliation. POS reconciliation: syncing daily sales from restaurant POS systems, cafes, and retail stores. ✦ Specialized reconciliation: fleet fuel reconciliation for trucking, donation reconciliation for nonprofits, escrow/trust reconciliation for law firms, Airbnb payout reconciliation for property managers. ✦ Error resolution: fixing bank feed mismatches, beginning balance issues, undeposited funds cleanup, unapplied payments fix, duplicate entry removal. 🔹 Transaction Categorization & Chart of Accounts Accurate categorization ensures reliable reporting. I provide: ✦ Transaction categorization: income, expenses, assets, liabilities, and equity classification. ✦ Chart of accounts setup: industry‑specific COA for real estate, construction, trucking, ecommerce, healthcare, law firms, restaurants, nonprofits. ✦ Inventory reconciliation: ecommerce COGS reconciliation, Shopify inventory reconciliation, Amazon FBA inventory reconciliation, WooCommerce reconciliation. ✦ Payroll reconciliation: mapping payroll liabilities, employee onboarding, correcting payroll errors in QuickBooks Online. 🔹 Accounts Payable & Accounts Receivable I streamline AP/AR workflows with: ✦ Accounts payable bookkeeping: vendor bills entry, payments, credits, purchase orders, vendor reconciliation. ✦ Accounts receivable bookkeeping: customer invoicing, sales receipts, unapplied payments fix, collections management, statement delivery. ✦ Industry pain points solved: subcontractor 1099 reconciliation for construction, client escrow reconciliation for law firms, donation receivable reconciliation for nonprofits, fleet vendor reconciliation for trucking. 🔹 Financial Reporting & Tax Preparation I prepare monthly financials, Profit & Loss statements, Balance Sheets, Cash Flow Statements, and tax‑ready books. My services include: ✦ Year‑end bookkeeping cleanup: aligning retained earnings, reconciling prior year balances, preparing tax filings. ✦ Tax preparation support: ensuring compliance with IRS, CRA, HMRC requirements. ✦ Industry‑specific reporting: investor reporting for real estate, grant reporting for nonprofits, job costing reports for construction, fleet expense reports for trucking, POS sales reports for restaurants. ✅ Whether your books are two months behind or two years behind, I restore accuracy with QuickBooks cleanup, QuickBooks catch up, and complete bank reconciliation services. My goal is to deliver clean ledgers, reconciled accounts, tax‑ready financials, and stress‑free QuickBooks Online bookkeeping across every industry. quickbooks Online Bookkeeping, quickbooks Cleanup & Catch Up, Bank Reconciliation quickbooks Online, quickbooks Certified ProAdvisor, QuickBooks Payroll Reconciliation, quickbooks Accounts Payable Management, QuickBooks Accounts Receivable Management, quickbooks Financial Reporting, quickbooks Tax Ready Bookkeeping, quickbooks Ecommerce Bookkeeping (Amazon, Shopify, Etsy), QuickBooks QBO

If your Shopify store is slow, broken, losing conversions, needs a custom app built, or needs to connect to an external system — I have solved it before and I can solve it for you. I work 100% inside Shopify. Not a generalist who added Shopify to a skills list — a dedicated Shopify developer with 6 years of focused experience across app development, theme development, speed optimization, integrations, and CRO. I work best with DTC brands, SaaS founders building on Shopify, and agencies that need a reliable specialist for complex projects. CUSTOM SHOPIFY APP DEVELOPMENT I have built and shipped 4 apps through Shopify's full review process — OAuth, billing systems, GDPR webhooks, App Store compliance, and deployment. Most Shopify developers on Upwork have never done this. My published apps: Stock Alert — real-time inventory monitoring, auto-hide sold-out products, auto-republish when restocked, email and Slack alerts, GDPR compliant Shoppable Posts — turns blog posts into shoppable product displays with variant selection and add-to-cart DemandMind Forecasting — Shopify app layer over a client's AI forecasting engine, Python backend, multi-store support BGN to EUR Converter — live currency conversion display for Shopify stores Full stack: React, Node.js, TypeScript, Polaris, App Bridge, GraphQL, webhooks, PostgreSQL. Results clients have seen: Mobile Lighthouse score from 38 to 92 (Kind Laundry — full speed overhaul) OMS API response time cut from 4 seconds to 400ms Full print-on-demand fulfillment platform built from scratch Clean, accurate, matched the design perfectly. He handled technical details without needing constant direction. SHOPIFY THEME DEVELOPMENT Custom Shopify themes built from scratch — Liquid, Shopify 2.0, clean and maintainable code. No page builders, no shortcuts. Figma to Shopify — pixel-perfect conversion from any design file Custom sections, blocks, and templates Homepage, PDP, PLP, landing pages, full store builds Theme customization on Dawn, Prestige, Impulse, Refine and more Shopify Plus theme customization including custom checkout Mobile-first responsive design SPEED OPTIMIZATION AND CORE WEB VITALS A slow Shopify store is losing you money every day. I fix it with real numbers, not vague promises. Lighthouse score improvements with before and after results Core Web Vitals: LCP, CLS, FID fixes JavaScript optimization and cleanup App bloat removal and conflict resolution Liquid performance fixes and image optimization SHOPIFY PLUS DEVELOPMENT Custom checkout extensions and Checkout Extensibility Shopify Functions — discount logic, shipping rules, payment customization Shopify Flow automations B2B and wholesale store setup Multi-currency and international stores API INTEGRATIONS AND CUSTOM SOLUTIONS ERP, CRM, and OMS integrations Third-party payment and shipping systems Webhook architecture and real-time data sync Custom admin tools and automation dashboards GraphQL and REST API development LANDING PAGE DEVELOPMENT AND CRO High-converting landing page development UX audits — finding where customers drop off and why Product page and checkout flow optimization AOV improvements — bundles, upsells, cross-sells Trust signals, social proof, and review integration MIGRATIONS WooCommerce, Magento, Wix, BigCommerce to Shopify Products, customers, orders, metafields — all migrated SEO-safe URL structure and redirect mapping, zero data loss BUG FIXES AND TROUBLESHOOTING Theme bugs, broken layouts, JavaScript errors, app conflicts Liquid syntax and rendering issues Mobile display problems and post-update breakages Broken API integrations and performance regressions STORE SETUP AND ADMINISTRATION Full store setup — products, collections, navigation, shipping, taxes, payments App installation and configuration: Klaviyo, Yotpo, Judge.me, Recharge, Bold, PageFly Ongoing maintenance, analytics setup, GA4 and Meta Pixel tracking I give honest assessments. If something is not worth building or there is a simpler solution, I will tell you. I do not pad hours and I do not disappear mid-project. Code is production-ready before handover. Send me a message with what you are building, what is broken, or what system you need connected. I will give you an honest assessment and a clear path forward within 24 hours.