Hire the Best Invoicing Specialists

My objective is to work online on a very challenging research profession that would require a thorough analysis and critical thinking.

Highly resourceful and determined Legal Billing Specialist with extensive experience in liaising with clients, attorneys and staff members, to generate, distribute, finalize and submit legal bills, using a wide variety of approved billing and e-billing systems. Expert in resolving billing-related issues from internal and external clients. Coordinates with partners and staff members to address questions related to billing processes.

I'm a Xero-certified bookkeeper and virtual assistant currently supporting a hospitality/travel business with their end-to-end financial administration, and I'm looking to take on one additional part-time client. With my existing client, I manage and reconcile up to 48 accounts, including bank accounts, credit cards, and multi-currency merchant accounts across 15 currencies, and handle accurate, timely, UK VAT-compliant bookkeeping in Xero, along with broader admin and virtual assistant support. UK VAT & Tax Knowledge Sound working knowledge of UK VAT rules, including standard-rated, zero-rated, and exempt supplies, along with HMRC compliance requirements. Here's what I currently help my client with, and can bring to you too: Bookkeeping, Reconciliation & Reporting Entering purchase invoices and processing received payments into Xero Keeping accounts payable/receivable up to date and accurate Full monthly netting-off processes (sales invoice imports, credit notes, duplicate invoice checks) Managing and reconciling multiple bank accounts, credit cards, and multi-currency merchant accounts (e.g., AIB Merchant Services) across various currencies Downloading, sorting, and importing multi-currency merchant statements with accurate FX handling Reconciliation across payment gateways such as Barclaycard, Capital on Tap, and Opayo/SagePay, plus gift card platforms Booking channel reconciliation: Bookingcom, VRBO, Expedia, Airbnb, and similar platforms Self-billing invoice creation for supplier and affiliate platforms Marketplace income reconciliation (e.g., Apple, Google), calculating net income after platform fees Reviewing postings for consistency and accuracy across the ledger VAT & Compliance Correctly recording VAT (standard, zero-rated, exempt) in accordance with UK VAT rules Ensuring all entries are accurate, complete, and audit-ready Handling subscription invoices, vendor payment offsets, and annual reconciliations Multi-Currency GBP, AUD, CAD, CHF, DKK, EUR, HKD, JPY, MXN, NOK, NZD, PHP, SEK, SGD, USD, ZAR Tracking Ad Spend Google Ads Meta Ads Microsoft Ads Xero Expertise Chart of accounts setup and layout changes Custom coding structures tailored to your business Clean, organized books that make life easier at year-end General Bookkeeping & Virtual Assistance General bookkeeping support for businesses of any size or industry Data entry, inbox and calendar management, document organization Ad hoc admin tasks, research, and process support to keep your business running smoothly I'm detail-oriented, deadline-driven, and comfortable managing high-volume, multi-currency transactional bookkeeping across dozens of accounts and platforms. I have capacity for one more part-time client and would love to bring the same reliability and accuracy to your books. Let's chat about how I can support you!

Does your billing process feel like a bottleneck? I am here to change that. I offer a decade of deep-dive expertise in medical billing to help practitioners like you reclaim their time. My approach is simple: Accuracy, Efficiency, and Transparency. I bridge the gap between your services and your payments, ensuring every claim is handled with meticulous care. Whether it’s resolving old AR or setting up a new billing workflow, I’ve got you covered. My extensive services encompass: ☑ Patient Management (Appointment Scheduling, Registration, Demographic & Charge Entry, Invoicing) ☑ Insurance Eligibility Verification and Verification of Benefits (VOB) ☑ Claims Scrubbing and Submission ☑ Prior Authorization/Retro Authorization ☑Accounts Receivable ☑Denials Management ☑ Appeals Filing ☑ Insurance Follow-up ☑ Revenue Cycle Management ☑ Customer Service and Administrative Assistance ☑Medical Coding ☑ Daily/Weekly/Monthly Reporting ☑ Payment Posting (ERA, EOB) ☑Intake Process ☑Patient Help Desk Services ☑ PCP referrals: ☑CAQH Attestation ☑ Credentialing/Enrollment/Contracting Specializing in: 🧠 Mental Health 🔄 Behavioral Therapy 🚨 Urgent Care🛠 Occupational Therapy 🦴 Orthopedics🗣️ Speech and Feeding Therapy 💪 Physical Therapy🥦 Dietitians 🦴 Chiropractic ♥️ Cardiology 🏥 General Surgery 👩‍⚕️ Internal Medicine🩹 Pain Management 🦶 Podiatry 👨‍👩‍👧‍👦 Family Practice 🧠 Psychiatric ABA 🔬 Pathology Labs 🧪 Testing Labs Proficient in Medical Billing Software such as: | OfficeAlly | eClinicalWorks | Kareo / Tebra | Therapy Notes | Raintree | Advanced MD | PrognoCIS | Lytec | Collaborate MD | Turbo PT | Simple Practice | Ability | eMedica | Waystar | Dr Chrono | Aprima | Therapy iQ | Intergy | Sessions Health | Telcor | Chirotouch | Valant | Med Office | WellSky | Axxess | Alora | zHealth EHR/EMRs: | Practice Fusion | Kareo EHR | Office Ally EHR | Web PT | Elation | ICANotes Clearing Houses: | Waystar | Claim.MD | ChangeHealthCare | TriZetto | Office Ally | Availity | Head Way Proficiency in Insurance Provider Portals: Medicare and its Advantage plans UHC Aetna ECHO Zelis Optum BCBS CIGNA Medicare administrators (WPS GHA, Novitas, Noridian) Medicaid and its MCOs Tricare Kaiser Permanente Molina Healthcare And many more... Detail-Oriented Processes: My skills include ERA/EFT Setups, Claim Scrubbing (LCD/NCD/NCCI Covered), and ensuring accuracy and compliance with industry standards. I truly take pride in making a real difference by helping healthcare providers and organizations grow. I am all about following the rules (especially HIPAA) and staying on top of what's happening in the industry. My Goal = My Clients' Success 🎯🤝🏆

I help businesses fix messy books, resolve discrepancies, and regain control of their financial and operational systems. With 10+ years of experience across bookkeeping, payroll, HR support, and business operations, I ensure financial records are accurate, reconciled, and audit-ready—whether it’s QuickBooks cleanup, AR issues, payroll discrepancies, or 401(k) contribution mismatches. Core Services Bookkeeping & Financial Operations QuickBooks Online cleanup and catch-up Bank and credit card reconciliations Shopify and payment processor reconciliation Inventory and COGS alignment (SOS Inventory) Financial reporting and transaction accuracy Accounts Receivable & Billing Aging reports and collections follow-up Payment application and discrepancy resolution Client statements and account reconciliation Contractor and client billing support Payroll, HR & Compliance Payroll processing and review 401(k) contribution reconciliation and corrections Preparation and filing support for Form 5500 Filing through EFAST2 Family leave administration (FMLA/state leave tracking, compliance, and documentation) HR administrative support (onboarding, employee records, benefits coordination) Coordination with TPAs, payroll providers, and accountants Operations & Process Improvement Workflow cleanup and process standardization Reporting and data tracking (Excel-based) Cross-team coordination across accounting, payroll, and operations What Sets Me Apart I don’t just record transactions—I identify issues, correct them, and implement processes to prevent them from happening again. My work is especially valuable for businesses dealing with: Migration issues (QuickBooks Desktop to Online) Reconciliation discrepancies Payroll or benefits inconsistencies Disorganized AR and cash flow tracking Tools & Systems QuickBooks Online (QBO), QuickBooks Desktop (QBD), SOS Inventory, Shopify, Microsoft Excel, Google Workspace, payroll systems, EFAST2, Docusign, Dropbox, Zoom, Microsoft Teams Availability Available for ongoing support or project-based work. I prioritize accuracy, clear communication, and efficient turnaround.

Top 1% Mobile App Developer on Upwork | Flutter, iOS & Android | AI-Powered Apps | 100% Job Success Tired of mobile apps that crash under real users, or developers who disappear mid-project? I have solved that exact problem for 60+ founders and businesses. My clients launch apps that hold up on Day One, clean Flutter/native code, App Store & Google Play ready, and AI features that actually work. 100% Job Success, Top Rated, 9+ years of experience, 30+ apps live in the market. 🎯 WHAT I BUILD ▸ FULL-CYCLE MOBILE APP DEVELOPMENT From idea to App Store/Play Store launch. Flutter, Android, and iOS apps built for real users from day one. ▸ CROSS-PLATFORM APPS (FLUTTER + REACT NATIVE) One codebase, native performance on both iOS and Android. Faster delivery without sacrificing quality. ▸ NATIVE ANDROID & iOS DEVELOPMENT Platform-specific builds when performance or deep OS integration matters most. ▸ AI-POWERED MOBILE APPS OpenAI API integration for smart features chat, recommendations, automation implemented cleanly, no over-engineering. ▸ ON-DEMAND & MARKETPLACE APPS Ride booking, food delivery, real estate listing, e-commerce Uber/Airbnb-style apps built end-to-end. ▸ BACKEND & API DEVELOPMENT Node.js, Python (FastAPI/Flask/Django), REST & GraphQL APIs, connected to Firebase, MySQL, MongoDB, or your stack of choice. ▸ CODE AUDIT & APP STABILIZATION Inherited a buggy app? I audit performance, crashes, and architecture, then deliver a fix plan fast. 💬 CLIENT FEEDBACK Review 1: Great experience working with Shahab Malik on our mobile app project. He's skilled in Flutter, Dart, Node.js, and API Integration, and delivered clean, functional code on time. Communication was smooth, and he was open to feedback. Highly recommended for Mobile App Development. Review 2: Shahab Malik is professional and responsive, with strong skills in Cross Platform and iOS/Android App Development using Flutter. He delivered a well-designed app with smooth UI and RESTful API integration, even adding some AI features. 🏆 CREDENTIALS - Top 1% Talent on Upwork Mobile App Development - 100% Job Success, 60+ Projects Delivered - 30+ Apps Live on App Store & Google Play - 9+ Years of Experience - AI Mobile App Development (OpenAI Integration) 🚀 HOW WE START ✉️ MESSAGE ME ON UPWORK Have a mobile app idea, or an existing app that needs fixing? Message me for a free consultation and a clear plan to launch faster. How I Work Full-cycle mobile apps in Flutter, Android, iOS, with clean backend and API integration. Figma designs turned into pixel-perfect UI, progress tracked in Jira/Trello, communication through clear updates, and delivery with long-term support after launch. 🛠️ TOOLS & TECHNOLOGY Mobile Development Flutter, Dart, React Native, Android (Kotlin/Java), iOS (Swift) Backend & Databases Node.js, Python (FastAPI, Flask, Django), Firebase, Firestore, MySQL, MongoDB, SQLite APIs & Integrations REST API, GraphQL, OpenAI API, Firebase Cloud Functions Cloud & Deployment AWS, Google Cloud, Firebase Design & Collaboration Figma, Adobe XD, Material Design, Cupertino Widgets, Git, GitHub, GitLab, Bitbucket, Jira, Trello Solutions Delivered Ride/Booking Apps, Real Estate Apps, Social Media Apps, Sports Apps, Food Delivery Apps, E-commerce Apps, Learning Management Apps, Appointment Booking Apps, CRMs, On-demand Apps Mobile App Developer, Flutter Developer, iOS Developer, Android Developer, AI Mobile App Development, Cross-Platform App Development Keywords: Flutter, Dart, OpenAI API, Full Stack Developer, Back End Developer, API Integration, Node.js, SQL, Mobile App Development, Mobile App Developer, Android App Development, Android App Developer, AI Mobile App Development, AI Mobile App Developer, Mobile App Design, Mobile App UI Design, Responsive Design, UI/UX Designer, Prototyping, Mobile App API Integration, iOS App Developer, iOS App Development, Hybrid App Development, Cross Platform App Development, Express.js, RESTful API, Machine Learning App Integration, Senior Mobile App Developer, Software Designer #Flutter #Dart #OpenAIAPI #FullStackDeveloper #BackEndDeveloper #APIIntegration #Nodejs #SQL #MobileAppDevelopment #MobileAppDeveloper #AndroidAppDevelopment #AndroidAppDeveloper #AIMobileAppDevelopment #AIMobileAppDeveloper #MobileAppDesign #MobileAppUIDesign #ResponsiveDesign #UIUXDesigner #Prototyping #MobileAppAPIIntegration #iOSAppDeveloper #iOSAppDevelopment #HybridAppDevelopment #CrossPlatformAppDevelopment #Expressjs #RESTfulAPI #MachineLearningAppIntegration #SeniorMobileAppDeveloper #SoftwareDesigner