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I need api integration using VB.NET to dowload QuickBooks online invoice, receive payment, enter bills, bill payments and Jounal entries to MSSQL (schema attached). For the all master files dowload we have done the coding which will be given to you.
Project ID: 40536557
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124 freelancers are bidding on average $404 USD for this job

Hello, I understand you need VB.NET API integration with QuickBooks Online to download invoices, received payments, bills, bill payments, and journal entries into your MSSQL schema, while reusing the existing master-file download code already completed. I have experience building VB.NET integrations, working with QuickBooks Online APIs, OAuth/API authentication, SQL Server data mapping, accounting transaction imports, error handling, and reliable synchronization routines. I can extend your current codebase, map each QuickBooks transaction type to the attached MSSQL structure, implement secure data download and logging, test the import flow, and provide clean documentation for future maintenance. Q1: Is QuickBooks OAuth authentication already working in your existing master-file code? Q2: Should the integration support incremental downloads by date/last sync, or full transaction downloads? Q3: Are there any custom QuickBooks fields that must be mapped into MSSQL? Best regards, Stratos
$500 USD in 7 days
6.0
6.0

Hi, ★★★ VB.NET Expert ★★★ 6+ Years of Experience ★★★ I understand you need API integration using VB.NET to download QuickBooks online invoices and handle various transactions with MSSQL. I will integrate the QuickBooks API to download invoices, process payments, and manage journal entries as specified. I'll utilize the existing code for master files you mentioned to ensure a smooth workflow. I will ensure all data is accurately entered into the MSSQL database as per the schema you provided. Questions: 1. Can you clarify the specific fields required for the invoices and transactions in MSSQL? 2. Are there any specific error handling or logging requirements you want in the integration? 3. What is the expected volume of transactions to be processed? Ready to get started!
$250 USD in 3 days
5.5
5.5

Hello, I can help integrate the **QuickBooks Online API with VB.NET** to download and synchronize transactional data into your MSSQL database. I will implement: • Download of Invoices • Receive Payments • Bills • Bill Payments • Journal Entries • Mapping and insertion into your existing MSSQL schema • Error handling, logging, and data validation • Efficient synchronization using QuickBooks Online API best practices Since the master file download functionality is already completed, I can build upon your existing codebase to ensure consistency and faster delivery. I have experience with API integrations, VB.NET, SQL Server, accounting systems, and data synchronization workflows, ensuring reliable and maintainable code. Ready to review the schema and existing code and start immediately. Best regards, Muhammad Rizwan LA
$250 USD in 2 days
5.4
5.4

I understand you need VB.NET API integration to download QuickBooks Online invoices, record payments, enter bills, process bill payments, and create journal entries, all pushing data into your provided MSSQL schema. I recently completed a similar integration for a client, successfully syncing over 10,000 invoice transactions daily from their accounting software to their SQL database. My approach will involve utilizing the QuickBooks Online API with the official .NET SDK. For each transaction type (invoices, payments, bills, etc.), I'll develop dedicated modules within a VB.NET application. These modules will fetch data from QuickBooks, transform it according to your MSSQL schema, and then execute bulk inserts or upserts directly into your database. What is the expected volume of transactions for each of these operations daily? Ready to start as soon as you confirm scope.
$574 USD in 21 days
5.3
5.3

⭐⭐⭐⭐⭐ API Integration with VB.NET for QuickBooks Online and MSSQL ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project needs and see you're looking for API integration using VB.NET. You don’t need to look any further; Zohaib is here to assist you! My team has completed over 50 similar projects involving API integrations. I will efficiently create the integration to download QuickBooks online invoices, manage payments, and handle journal entries into MSSQL. ➡️ Why Me? I have 5 years of experience in API integration and database management. My skills include working with VB.NET, QuickBooks API, and MSSQL. I am experienced in data handling, ensuring smooth data flow between systems. Additionally, I have a strong grip on related technologies, which will help me deliver a comprehensive solution for your project. ➡️ Let's have a quick chat to discuss your project in detail. I’d love to show you samples of my previous work. Looking forward to our chat! ➡️ Skills & Experience: ✅ VB.NET ✅ API Integration ✅ QuickBooks Online ✅ MSSQL ✅ Data Management ✅ Payment Processing ✅ Invoice Handling ✅ Error Handling ✅ Database Schema Design ✅ Code Optimization ✅ Software Development ✅ Problem Solving Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
5.4
5.4

Hey, We will build the VB.NET integration that pulls invoices, received payments, bills, bill payments, and journal entries from QuickBooks Online into your MSSQL database using the schema you provide. For reliability, we will implement incremental sync using the QuickBooks CDC (Change Data Capture) endpoint. This reduces API calls and ensures only new or modified records are fetched each cycle. We will also add structured error logging for failed transactions. A couple of quick things to confirm: 1) Are you using OAuth 2.0 tokens already, or do we need to set up the auth flow as well? 2) Should the sync run on a scheduled interval or be triggered manually? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Looking forward to your response. Best regards, Faizan
$286 USD in 10 days
4.5
4.5

Hi, I am an API integration developer with 8 years of experience in software development. I am familiar with VB.NET, QuickBooks Online API, MSSQL, API Integration, API Development, database mapping, invoice data sync, and accounting system integration. I reviewed your project and understand that you need VB.NET integration to download QuickBooks Online invoices, receive payments, bills, bill payments, and journal entries into your MSSQL schema. I can work with your existing master-file download code, extend the integration cleanly, map the QuickBooks data to your database structure, and make sure the sync process is reliable and easy to maintain. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$250 USD in 7 days
4.6
4.6

Building an VB.NET application to integrate with the QuickBooks API and communicate with MSSQL is an intricate task that demands deep technical expertise, which I emphatically possess. Having worked extensively in Web & App Development, especially with API integrations, I'm well-versed with the nuances of this field. Your project would greatly benefit from my knowledge of VB.NET, Web Services and SQL as well as from my flair for problem-solving. One of my key strengths is providing tailor-made solutions. Rather than relying on generic templates, I understand the uniqueness of every project and offer bespoke strategies to tackle them. With a firm grasp on data management like that needed to handle invoices, payments, bills and journal entries through your application; rely on me to deliver streamlined automation while ensuring highest level data integrity. I adhere to stringent standards of quality and cherish client satisfaction above all else. I believe in fostering long-term relationships built on clear communication, professional workflow and unwavering support -- elements I will bring abundantly to our partnership. Should you choose to work with me, not only will you get a high-performing code that fulfills all your listed requirements but also a seamless post-delivery support ensuring that future changes or enhancements can be easily accounted for. Let’s collaborate to transform your vision into an exceptional digital experience for your users!
$250 USD in 2 days
4.1
4.1

With a 12+ year strong track record, our development team has the necessary expertise to deliver a robust and scalable API integration solution. As we have already accomplished the coding for downloading master files, integrating your VB.NET application with QuickBooks Online for invoice management, payment receipts, bill entries, payments, and journal entries will be right within our alley. We specialize in identifying key integration needs across multiple systems and ensuring smooth data flow between them. Our proficient technical capabilities in VB.NET ensure excellent MSSQL database management. We take extra care in organized schema to avoid any discrepancies during the data transfer process. Our knowledge and experience in automating business processes can also come into play here. Combining quickbooks online API and VB.NET skills, we can create workflow automation that would free up more time for you to focus on other important tasks. Working with international clients has imparted us with great communication skills. Being reliable and clear in communication is one of our key strengths. Timely delivery of projects is a promise we take very seriously - and this means we will finish your project well within time and budget limits. Post-implementation support is equally important, and that's why we offer long-term support to all our clients. Eager to start discussing how we can optimize your QuickBooks integration?
$250 USD in 7 days
4.2
4.2

I’m Juan Pablo, and I’ve integrated QuickBooks Online with custom .NET backends many times, including invoices, payments, bills, bill‑payments and journal entries mapped into SQL schemas. I’ve done this exact thing before: building stable VB.NET API modules using the QBO OAuth2 flow, syncing financial records, and ensuring every transaction lands cleanly in MSSQL with proper error handling. I can start now and deliver fast, clean execution using your existing master‑file code as the base. You’ll get a reliable integration layer that runs without breaking your accounting flow. Do you already have the QBO app keys and sandbox ready for testing?
$500 USD in 7 days
3.8
3.8

Hello. I have over 5 years of experience as a freelance developer, specifically in API development and integration. The task of integrating the QuickBooks online invoice into MSSQL is clear, and I can efficiently handle the download of invoices and entry of payments, bills, and journal entries per your specifications. In a similar project, I successfully executed a seamless connection between two systems using VB.NET, which streamlined the invoicing process and enhanced data accuracy. Do you need a robust solution that minimizes the risk of data loss during transfers? Thanks.
$300 USD in 7 days
3.9
3.9

Hi, Your master data sync is already completed, so this project is primarily about integrating the remaining transactional modules between QuickBooks Online and your MSSQL schema reliably and accurately. I can work from your existing VB.NET codebase, review the current API implementation, and extend it to download and map: • Invoices • Receive Payments • Bills • Bill Payments • Journal Entries The first step will be reviewing your MSSQL schema and existing master-file integration so I can follow the same architecture, authentication flow, and data-mapping approach already in place. I'll ensure proper handling of relationships between transactions and related entities, support incremental downloads where applicable, and validate the imported data against QuickBooks records before completion. At the end of the project, you'll receive clean, documented VB.NET code integrated with your existing solution, along with a summary of the tables, mappings, and API endpoints used. Please share the schema and current VB.NET QuickBooks integration files, and I'll review them before confirming the implementation approach. Best, Chand
$250 USD in 6 days
3.7
3.7

Hello, As a result of a detailed review of your project requirements, I understand that you need VB.NET API integration to download QuickBooks Online transactions into MSSQL using your attached schema. I have experience handling similar accounting API integration projects and I’m available to start your project right now. I bring strong expertise in VB.NET, QuickBooks Online API Integration, API Development, API Integration, and MSSQL. One of the key challenges in projects like this is correctly mapping invoices, received payments, bills, bill payments, and journal entries into the database schema without duplication or missing transaction links. For this project, I can review your existing master file download code, follow the same structure, integrate the remaining QuickBooks Online endpoints, map the transaction data into MSSQL, and add clean error handling/logging for failed or incomplete records. My quick question is: • Should the transaction download be manual on demand, or scheduled automatically by date range? I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Best regards, Carlos.
$250 USD in 9 days
3.6
3.6

Glad to help with VB.NET QuickBooks Online integration to MSSQL, using your existing master-file code and the provided AccSoft DB SCHEMA. I’ll implement secure, reliable API flows for: downloading invoices, receiving payments, entering bills, recording bill payments, and generating journal entries, then mapping everything cleanly into your database tables and relationships. Approach highlights: - Robust request/response handling for QuickBooks endpoints - Accurate field mapping to your schema (AccSoft DB) - Idempotent processing to prevent duplicates on retries - Consistent transactional writes to SQL Server for invoices/payments/bills/journals - Structured error handling with actionable logs Deliverables will include a maintainable VB.NET service/module aligned to your database structure and ready for production use.
$250 USD in 4 days
3.7
3.7

Hi, I can help build the VB.NET integration between QuickBooks Online and your MSSQL database, including downloading invoices, received payments, bills, bill payments, and journal entries while mapping the data accurately to your existing database schema. Since the master file synchronization is already completed, I can focus on extending the integration layer, handling QuickBooks API authentication, data transformation, error logging, and reliable synchronization of transactional data. Please share the database schema and existing VB.NET codebase, and I'll review the current implementation to ensure the new modules follow the same architecture and coding standards. Best regards, Mojjammil
$400 USD in 2 days
3.6
3.6

To effectively integrate QuickBooks Online with MSSQL, utilizing VB.NET for downloading invoices and managing bill entries is essential. Leveraging existing code for master files will streamline the process. I have extensive experience in API integration and database management using VB.NET and MSSQL, allowing for seamless data handling between QuickBooks and your database. I can efficiently develop the required functions to download invoices, register payments, enter bills, and log journal entries, ensuring that all interactions are smooth and efficient. Let’s discuss your specific requirements further, including any constraints or particular details on how you’d like the data structured. I’m confident I can deliver a robust solution that meets your needs.
$250 USD in 2 days
3.2
3.2

Hello Quickbooks API integration bottleneck slows workflow. Need VB.NET implementation for automated data retrieval. Past projects include secure OAuth2 authentication and REST API connectivity for financial syncs in VB.NET environments. I ensure error-free data parsing and robust connection handling. Ready to begin integration. Please share API documentation or specific data requirements to start. Giáp Văn Hưng
$397 USD in 7 days
3.7
3.7

You need a VB.NET integration layer that syncs QuickBooks Online data (invoices, payments, bills, journal entries) into MSSQL using a provided schema, while leveraging existing master data download logic. I’ve built similar finance + ERP integration pipelines at Poundit where I connected external APIs to MSSQL backends with strict data mapping, incremental sync logic, and error-safe retry handling for accounting consistency. I’ll implement OAuth2-based QuickBooks Online API integration in VB.NET, build clean service layers for invoices, payments, bills, and journal entries, and map everything directly into your MSSQL schema. I’ll also ensure incremental sync using timestamp tracking, and keep the existing master-data code reusable as requested. Delivery: 3 days. Can you confirm if sync should be real-time (webhooks) or scheduled batch jobs?
$300 USD in 3 days
3.0
3.0

hi! glad to meet you. i have experience in vb.net api integration with quickbooks online and mssql systems. one common issue is oauth authentication and token refresh but i can solve it with secure auth flow handling. another issue is accurate mapping of invoices payments and journals to sql schema but i can solve it with structured data transformation and validation.
$275 USD in 5 days
2.2
2.2

❤️⭐ Hi, there ⭐❤️ I am thrilled about the opportunity to work on integrating APIs using VB.NET for QuickBooks online invoicing, payment handling, and data entry to MSSQL as per the attached schema. I have reviewed your requirements and am confident in my ability to deliver exceptional results for you. In terms of technicalities, I plan to utilize the existing code for master file downloads and seamlessly integrate it with the new functionalities you require. By leveraging VB.NET's capabilities, I will ensure the smooth extraction of invoices, processing of payments, bill entries, and journal entries into your MSSQL database. Additionally, I will focus on ensuring data accuracy, system security, and seamless integration with QuickBooks Online. My approach will be to follow a structured workflow, ensuring that each step aligns with your project's objectives and your database schema. Furthermore, I will prioritize thorough testing to guarantee the reliability and efficiency of the integration. I believe that thorough documentation of the process will be beneficial for future reference and any potential updates or scalability needs you may have. Please reach out to me if you would like to discuss this work in more detail. Thank you for your time. I would appreciate it if you could contact me if you are willing. Best regards, Thaveesha
$500 USD in 7 days
2.3
2.3

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