Hire the Best Quick Books Online API Professionals

Bachelor of Engineering (B.Eng.) | Yuriy Fedkovych Chernivtsi National University, Ukraine I’m a .NET developer specializing in building reliable, production‑ready systems for e‑commerce, logistics, and workflow automation. I focus on backend engineering, API integrations, and deterministic data pipelines that keep operations stable and predictable. I build Windows services, DevExpress‑based desktop applications, API integrations, and SQL‑driven ingestion engines using C#, .NET, and SQL Server. My work includes deep integrations with Amazon SP‑API, Amazon Ads‑API, and other retail platform APIs, enabling automated workflows, real‑time data synchronization, and operational visibility across systems. I design systems that reduce manual work, improve operational reliability, and ensure data flows correctly between platforms. My approach is practical, engineering‑driven, and focused on long‑term maintainability — building solutions that behave consistently in real production environments.

💼 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 🔹 QuickBooks Cleanup & Catch Up QuickBooks Cleanup and catch‑up bookkeeping solve the pain points of outdated, messy, or incomplete records.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

⏱ Available across US, UK & EU time zones · Replies within 24 hours If you're dealing with any of these, you're in the right place: ❌ Stripe, Paystack, or Flutterwave integration that double-charges, misses webhooks, or won't reconcile ❌ Marketplace payments vendors not getting paid out correctly, split payouts breaking ❌ Subscription billing or recurring payments failing on edge cases ❌ Job queues silently losing data, or a backend slowing down as you grow ❌ You want AI features in your product, but your backend isn't built to support them I'm a Senior Backend Developer (Node.js · NestJS · TypeScript) specializing in payment gateway integration, API development, and AI-ready backend architecture. In 6+ years, systems I've built have processed ₦4B+ (over $2.9M) in payments, handle ~3,000 orders daily, and serve 15,000+ users, production backends that move real money and don't break under load. WHAT I BUILD ► Payment Gateway Integration — Stripe (including Stripe Connect), Paystack, and Flutterwave: payment processing, subscription billing, recurring payments, marketplace payments with split payouts and vendor payouts, installment plans, digital wallets, virtual cards, checkout flows, and transaction ledgers. Webhook reconciliation built with idempotency keys and dedupe logic that survives retries, duplicates, and out-of-order delivery, no double charges, no missed events. ► AI & LLM Integration — integrating OpenAI and Claude APIs into production Node.js backends: AI-powered features, assistants, and automated workflows, wired into the same queue, retry, and rate-limiting infrastructure as everything else I build, so your AI features stay reliable, not just impressive in a demo. ► API Development & Integration — REST API and GraphQL API development in NestJS and Express.js, structured for teams to extend. Third-party API integration and webhook infrastructure. ► Event-Driven Architecture — distributed systems on BullMQ and RabbitMQ: job queues with retry logic, dead-letter handling, scheduled workers, and observability built in. ► SaaS Backend Development — multi-tenant architecture with tenant isolation, RBAC, and granular permissions that hold up in audits. ► Database & Real-Time — PostgreSQL and MongoDB schema design built for correctness under concurrency. Redis caching and Pub/Sub, WebSockets for live balance sync and notifications. ► Microservices & DevOps — system design around domain boundaries, deployed on AWS with Docker and CI/CD pipelines. PRODUCTION RESULTS Multi-Vendor E-Commerce Backend — order management, vendor portal, dual-gateway payment integration (Paystack + Flutterwave) with vendor payout logic and webhook-based reconciliation. ₦2B+ ($1.4M+) processed, ~3,000 orders daily. (NestJS · MongoDB · Redis · BullMQ) Real Estate Investment Platform — installment payment plans, automated document delivery, investor/admin RBAC for 15,000+ users. ₦2B+ ($1.4M+) processed. (NestJS · PostgreSQL · AWS · Docker) FinTech Wallet & Transaction Ledger — digital wallet with virtual cards, double-entry ledger, real-time balance sync. Correct under concurrent writes. (NestJS · PostgreSQL · Redis · TypeScript) EdTech LMS Backend — video streaming support, real-time progress sync, course access control. (NestJS · PostgreSQL · WebSockets) HOW I WORK ► I flag problems early. The most expensive backend issues aren't technical — they're requirements nobody questioned. I ask before the first commit, not after the first incident. ► I write code your next engineer won't hate. Clean architecture, typed everything, tested with Jest (unit and integration), documented where it matters. ► I stay visible. Proactive updates, async-friendly, I've shipped with distributed teams across Lagos, London, and the US. SERVICES Payment Gateway Integration · Stripe Integration · Stripe Connect · Paystack Integration · Flutterwave Integration · Marketplace Payments · Split Payouts · Subscription Billing · Recurring Payments · Billing Automation · Wallet Systems · AI Integration · LLM Integration · OpenAI API · Claude API · API Development · Third-Party API Integration · Webhook Development · Backend Development · Node.js Development · NestJS Development · SaaS Development · Microservices · Event-Driven Architecture TECH STACK Node.js · NestJS · Express.js · TypeScript · PostgreSQL · MongoDB · Redis · BullMQ · RabbitMQ · GraphQL · REST API · WebSockets · AWS · Docker · CI/CD · Jest · Stripe · Paystack · Flutterwave · OpenAI · Claude INVITE ME Invite me with one sentence about what you're building or what's breaking. Within 24 hours you'll get an honest read on fit, a realistic timeline, and the one thing I'd flag before you start. No sales pitch.

Stop wasting hours on manual data entry, copy-pasting, and repetitive admin work. Let’s put your business on autopilot. I don’t just write spreadsheet formulas; I build intelligent, automated systems that run your business logic for you. Whether you need a simple script to organize data or a complex AI agent that coaches your project management team, I bridge the gap between your manual processes and full-scale software solutions. My goal is simple: You focus on strategy; I’ll handle the boring, repetitive logic that keeps operations running. Recent Success Stories: I have successfully delivered automation solutions for complex use cases, including: AI Project Management Agent: Built a serverless AI agent (Google Apps Script + OpenAI) that analyzes Trello boards to provide strategic "Mentor Reports" and prioritizes tasks based on impact. E-Commerce Sync: Created a real-time bridge between WooCommerce and Google Sheets using Webhooks, automatically exporting orders and translating customer data via API. Financial Modeling: Developed a custom stock trading tool that pulls live API data to generate dynamic Candlestick charts and technical indicators directly in Google Sheets. Marketing Analytics: Engineered a Python-based ML model connecting to the Google Ads API to predict future campaign volumes and conversion trends. Data Scraping: Built automated scrapers (Apify & Custom Scripts) to fetch data from external databases (WorldFengur, MLB) and process it into clean, actionable reports. My Technical Toolkit: Core: Google Apps Script (GAS), Python, JavaScript, Google Sheets (Advanced Formulas & Query). Integrations (APIs): OpenAI (GPT-4), HubSpot, Keap, WooCommerce, Slack, Trello, Google Ads. Data Engineering: ETL Pipelines, JSON parsing, Webhooks, and Web Scraping. If you are looking for a developer who understands both the code and the business strategy behind it, click "Invite to Job". Let’s discuss how we can streamline your workflow today.

✅ QuickBooks Online Bookkeeper | Cleanup, Catch-Up & Reconciliation Expert Are your QuickBooks Online books messy, behind, or inaccurate? I help business owners clean up, catch up, and maintain accurate QuickBooks Online accounts so their finances are tax-ready, compliant, and easy to understand. I am a Certified QuickBooks Online ProAdvisor with hands-on experience providing QuickBooks Cleanup, Catch-Up Bookkeeping, Bank Reconciliation, and Financial Reporting for small businesses, startups, and service-based companies. 🔹 My Core QuickBooks Online Services ✔ QuickBooks Online Setup & Chart of Accounts ✔ QuickBooks Cleanup & Catch-Up (months or years) ✔ Bank & Credit Card Reconciliation ✔ Transaction Categorization & Error Fixing ✔ Accounts Payable & Accounts Receivable ✔ Profit & Loss, Balance Sheet & Cash Flow Reports ✔ Ongoing Monthly Bookkeeping ✔ Inventory & Expense Tracking ✔ Payroll & Contractor (1099) Support 🔹 Why Clients Hire Me ✅ QuickBooks Online Specialist ✅ Detail-oriented & accuracy focused ✅ Clear communication & timely delivery ✅ Confidential handling of financial data ✅ Experience with US & Canada clients ✅ Reliable long-term bookkeeping support I understand how frustrating messy books can be. My goal is to turn disorganized QuickBooks Online files into clean, reconciled, and reliable financial records you can trust. 🔹 Industries I’ve Worked With • Small Businesses & Startups • Real Estate & Property Management • E-commerce & Online Sellers • Service-Based Businesses • Freelancers & Agencies 🔹 Tools & Software ✔ QuickBooks Online ✔ Excel & Google Sheets ✔ Stripe, PayPal (basic integrations) 📌 Ready to Get Your QuickBooks Online Back on Track? Whether you need a one-time QuickBooks Cleanup, Catch-Up for overdue months, or ongoing bookkeeping, I’m here to help. 📩 Send me a message today and let’s clean, organize, and simplify your QuickBooks Online books. #quickbooksonline #quickbooksexpert #quickbookscertified #quickbooksreconcilition #quickbooksuptodate #quickbooksaccountant #quickbooksbookkeeper #bankreconcilition #balancesheetreport #tranjectionmatch #tranjectiontransfer #tranjectioncatchup #tranjectionuplode #tranjectioncategorize #tranjectionmanuallyuplode #accountant #bookkeeping #accounting #bankreconciliation #bankcleanup #cardreconcilition #creditcardreconcilition #quickReconcilition #quickbookscleanup #quickbookscatchup #quickbooksreconciliation #quickbooksreport #accountreconciliation #quickbooksbookkeeping #chartofAccounts #accountingsoftware #transactiondataentry #quickbooksAccounting #quickBooksPayroll #accountsPayable #accountsReceivable #accountingInvoicing #Upwork #quickBooksCleanup #amazon #shopify #walmart #homeDepot #amazonbookkeeping #realestatebookkeeping #financialStatement #upwork.com #balanceSheet #profitandloss #IncomeStatement #financialaccounting #excel #usa #e-commercebookkeeper #financialReporting #financialProjection #financialModeling #financialAnalysis #FinancialVariance #payrollaccounting#ADPPayroll #English #AccuracyVerification #taxpretaration #administrativeSupport #Spreadsheet #Bookkeeperqbo #Freelancing #RemoteWorker #remoteWorking #freelancer #RealEstateBusiness #quickbooksexpert #realestatebookkeeper #propertyManagement #e-commerce #startupbussiness #smallbussiness #cleaningservice #childcare #advertising&marketing #nonprofitorganization #nursinghome

With a proven track record in custom app development and API integrations, I invite you to review my client feedback. [e-Commerce APIs] - Shopify API (Custom Apps, UI Extensions) - Amazon MWS - eBay API - Etsy API - BundleB2B API - Lazada API, Shopee API, Katana API (Katana MRP) - Bigcommerce API - VEND API [Shipping APIs] - Shipstation API - DHL Express MyDHL API - ThailandPost API [Web/Service APIs] - Google APIs (Maps, Analytics, Youtube, etc.) - Wordpress API - FAA API (Federal Aviation Administration) - Media NET API, OpenMail API, System1 API - Meta API, Instagram API, Facebook API - Tiktok Business API - Spotify API - Aircall API - Printify API - Spider Strategies - AlayaCare API - KEAP API - eSim Go API [Financial/Accounting APIs] - Quickbooks Online (QBO) API - OfficeRnD API, Dinero API - Paypal - Authorize NET