C# (Windows Application) Developer for UAE Riayati & Tatmeen Integration -- 2

@WOFZahid

Hi. Before anything else, the GS1 parser. Your scanners are the risk there, not the code. Batch (10) and serial (21) are variable length, so each one ends at the FNC1 separator. Most POS scanners in keyboard wedge mode strip that character out. The parser then can't tell where the batch ends and the serial begins. It looks perfect on your sample codes and fails on real stock. The scanners have to be set to send GS as ASCII 29, and the parser needs a fallback for the ones that won't. Expiry (17) is another one. It's YYMMDD where DD can be 00, meaning end of month, and a plain ParseExact throws on that. On Riayati, the part of mTLS that usually bites is the private key, not the handshake. A PFX loaded without the right key storage flags leaves temp key files behind and breaks the moment the app runs under a different Windows user. I'd put the certificate in the machine store, read it by thumbprint, and reuse one HttpClient instead of building one per call. I already build pharmacy software: a POS with batch and expiry tracking, controlled drug registers and regulatory invoicing. My healthcare compliance work, audit trails and encryption, is at monitrreg.co.uk. One week to get the sandbox calls running end to end. Do you already hold the MOHAP sandbox credentials and the mTLS certificate, or is that still to be applied for?

@Jennycreation

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * ASP.NET C# web and software development * Android app development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards

@akshaybhagwat76

Having successfully completed 94% of my jobs with positive feedback and being 100% on budget, I believe I have the skill set and experience required to fulfill your project requirements. In the past, I have developed complex, data-driven web applications and implemented API frameworks for sharing information among different systems. My proficiency in .NET, C#, Microsoft SQL Server, and software architecture will enable me to seamlessly integrate Riayati and Tatmeen APIs into your C# WinForms Desktop Software, ensuring the data flows smoothly and is stored securely. Moreover, as a dedicated developer, I always aim to achieve client satisfaction and quick project completion. I also believe in maintaining good communication throughout the process to ensure that your specific needs are met effectively and promptly. In conclusion, my experience in building web applications in a variety of technologies including .NET CORE MVC development makes me an ideal fit for this project. Let's work together towards successfully integrating UAE Riayati (MOHAP) & Tatmeen APIs into your existing C# Windows Desktop Application!

@vishal1145

Your Riayati integration will fail audit if you're not storing mTLS certificate thumbprints and OAuth refresh tokens with proper encryption at the SQL Server layer. UAE MOHAP requires full transaction traceability, and missing dispensing event logs will block your pharmacy license renewal. Quick questions - are you handling certificate rotation for mTLS without manual intervention? And does your current SQL schema support FHIR resource versioning for audit trails? Here is the architectural approach: - RIAYATI OAUTH + MTLS: Implement HttpClient with X509Certificate2 handler, store encrypted tokens in SQL using DPAPI, and build retry logic for FHIR R4 MedicationRequest/MedicationDispense endpoints with full error logging. - TATMEEN GS1 PARSING: Build regex-based DataMatrix parser extracting GTIN/expiry/batch/serial from AI format, validate against Tatmeen B2B verification API, and sync serial status to inventory tables with conflict resolution. - WINFORMS UI + DATABASE: Extend SQL schema with indexed transaction ID columns, add real-time barcode scan feedback forms with error prompts, and implement stored procedures for dispensing event rollback on API failure. I've architected similar MOHAP integrations for 2 UAE healthcare clients that passed DHA compliance audits. Let's schedule a 20-minute call to review your certificate setup and database schema before build starts.

@ganeshrasekar

As an accomplished C# .NET and Healthcare Integration Specialist, I have a firm understanding of API integration and extensive experience working with Microsoft SQL Server, and WinForms. Your project's demands align harmoniously with my proficiencies. To begin, the Riayati Integration task featuring OAuth 2.0 and Mutual TLS certificate-based authentication is something I've previously executed using the HttpClient library in C#. I'm also skilled at building FHIR R4 JSON schemas of which, in this case, involves fetching e-Prescriptions using Emirates ID. Furthermore, my capability to log API response errors and handle OAuth securely would be invaluable for your project's success. In regards to the Tatmeen Integration requirement, my tenure as a .NET developer is well-equipped to handle such demands. Designing a GS1 2D DataMatrix Barcode Parser in C# and extracting GTIN (01), Expiration Date (17), Batch/Lot Number (10), and Serial Number (21) are tasks I've successfully handled before. Intimately familiar with Tatmeen B2B REST APIs and their associated verification processes, I'm competent in syncing Tatmeen verification data with local SQL Server inventory records - ensuring an efficient workflow between them.

@ravichedwal

With over 8 years in the industry, and after successfully finishing more than 145 projects as a Full Stack Developer, I specialize in API integration and C# programming. My competencies stretch across various areas such as PHP & Web Development, Mobile App Development for both iOS and Android platforms, Database & Cloud management, and Third-Party Integrations. ====== Looking at your project requirements, my expertise is an excellent fit. In the Riayati integration part of the project, I have extensive experience with implementing OAuth2.0 and mutual TLS authentication using HttpClient and RestSharp in C#. Likewise, building FHIR R4 JSON schemas to Fetch e-Prescriptions and log API response errors to a SQL Server database has been a part of my past projects. ====== ======

@mayankinnovative

Hi there I can develop and integrate a C# Windows application with UAE Riayati and Tatmeen services, including API communication, authentication, data mapping, validation, error handling, logging, and secure data exchange. With 20 years of software development experience, I can work with C#, .NET, REST/SOAP APIs, databases, and healthcare system integrations. A few quick questions: - Which Riayati and Tatmeen APIs/endpoints need to be integrated? - Do you already have the API documentation, credentials, and certification/test environment? - Is there an existing C# application that needs integration or should the application be developed from scratch? I’ll focus on secure integration, accurate data mapping, reliable error handling, and compliance with the provided API requirements. I’m available to start immediately. Thanks

@Devesh009

Hi, I can help with this integration. I have experience in C#, WinForms, SQL Server, and REST API integration, including OAuth 2.0 authentication and working with FHIR R4 data for healthcare systems. I'm comfortable building secure API clients (HttpClient/RestSharp), parsing FHIR JSON for prescriptions and dispensing events, and handling GS1 2D barcode data (GTIN, batch, expiry, serial). I can also set up secure token storage and error logging in SQL Server. Happy to discuss Riayati and Tatmeen specifics and share my approach. Available to start soon. Regards, Devesh

@shailender18

As a results-driven Full Stack Developer specializing in API integration and software development, I believe I would be the perfect fit for your project! With my deep understanding of C# .NET, OAuth, FHIR, and SQL Server, I am confident that I can help you seamlessly integrate Riayati (MOHAP) and Tatmeen APIs into your C# Windows Desktop Application. My proficiency in implementing OAuth 2.0 and mTLS certificate-based authentication using HttpClient/RestSharp in C#, building FHIR R4 JSON schemas, and handling API response errors using SQL Server aligns perfectly with the requirements of this project. Moreover, my experience developing web applications with clean architecture and strong on-job databases like the one in this project uniquely positions me to extend your SQL Server tables securely. I am also comfortable with barcodes parsing (GS1) and have previously executed similar barcode-based projects successfully. My promise is not just the delivery but a well-optimized performance, strong security features, and clean architecture. Let's talk to discuss how we can steer your integration efforts for better healthcare services through this Windows Desktop Application.

@sunsriinfosys

Hello, We are Sunsri Infosys, a Software Engineering practice specializing in C# .NET desktop software, SQL Server, healthcare interoperability (FHIR R4), and GS1 serialization tracking. We propose integrating UAE Riayati (MOHAP) and Tatmeen APIs into your C# WinForms application. Execution Strategy: • Riayati (MOHAP HIE): Implement mTLS certificate authentication, OAuth 2.0, and FHIR R4 JSON payloads for fetching e-Prescriptions and posting MedicationDispense events. • Tatmeen & GS1 Parser: Build a C# GS1 2D DataMatrix parser to extract GTIN, Expiry, Batch, and Serial numbers, integrating with Tatmeen B2B APIs for verification and dispensing. • Database & UI: Extend SQL Server schema for mTLS parameters and logging, while adding WinForms UI controls for barcode feedback, lookups, and error prompts. • Sandbox Testing: Conduct end-to-end validation against official MOHAP and Tatmeen sandbox endpoints. Deliverables: 1. Modular C# service libraries for Riayati FHIR R4 and Tatmeen REST APIs. 2. GS1 2D DataMatrix barcode parsing module and updated WinForms UI components. 3. Extended SQL Server database migration scripts and error-logging routines. 4. Technical documentation and validated sandbox testing report. We are ready to review your WinForms codebase and API documentation to begin immediately. Best regards, Sunsri Infosys

@B1zt

Hi, The part that decides whether this project works is the connection to Riayati itself. Certificate based logins with MOHAP are where these integrations usually stall, and until a real prescription comes back from their sandbox, everything built on top of it is guesswork. So I would prove that piece first rather than build all of it at once. First phase: - Certificate and token login to Riayati working against the MOHAP sandbox, with tokens held safely inside your app - Look up a patient's prescriptions by Emirates ID and show them in a WinForms screen - Send dispensing events back to Riayati, with every request and failure recorded in SQL Server - Your existing tables extended for the transaction IDs, certificate settings and logs - A short write up of what MOHAP actually returned in testing 30,000 INR, delivered in two weeks. The Tatmeen barcode parsing and serial checks follow as a second phase, priced once you are happy with the first. One question: have the MOHAP sandbox certificates and client credentials been issued to you yet, or is that still in progress? Thanks, Bhagya

@ajittkumark

Hi, I can integrate the Riayati and Tatmeen APIs into your existing C# WinForms application while preserving the current SQL Server architecture. I have strong experience with C#/.NET, REST APIs, authentication, database integration, and enterprise application development. Proposed approach: • C# / .NET with HttpClient or RestSharp • OAuth 2.0 + mTLS certificate authentication • FHIR R4 JSON models for Riayati • MedicationRequest and MedicationDispense workflows • GS1 DataMatrix parsing for GTIN, expiry, batch and serial numbers • Tatmeen B2B REST API integration • SQL Server for transactions, serialization and audit logs • Secure credential/token and certificate handling • WinForms UI for scanning, prescription lookup and error handling I can also implement retry/error handling, structured API logging, transaction tracking, database migrations and sandbox testing against the official endpoints. I’ll work within the existing codebase and keep the integrations modular so future healthcare API changes can be handled cleanly. Relevant experience: • Enterprise C#/.NET applications • REST API and third-party integrations • SQL Server database systems • Authentication and secure API communication • Windows desktop applications I’m ready to review the existing WinForms architecture and API documentation and start with the Riayati/Tatmeen integration.

@shuklagopal

Hello, If you really need to integrate this API into your application, I can help you. 14 years of Windows development experience using Visual studio/ MSVC and C#. Worked on several such complex SDK for applications development. We can connect any time if you feel to go ahead. Thanks.

@rajeshrolen

Hello, I am a skilled C# .NET Developer with a strong background in healthcare integration. Your project requiring the integration of UAE Riayati (MOHAP) and Tatmeen APIs into a C# WinForms Desktop Software aligns perfectly with my expertise. For the Riayati Integration, I will proficiently implement OAuth 2.0 and mTLS authentication, construct FHIR R4 JSON schemas for e-Prescriptions and Dispensing Events, and ensure secure token handling and error logging in SQL Server. Regarding the Tatmeen Integration, I will develop a GS1 2D DataMatrix Barcode Parser in C#, integrate with Tatmeen APIs for serial verification, and synchronize data with SQL Server inventory records. In terms of Database & UI Implementation, I will extend SQL Server tables, incorporate UI components for barcode scanning feedback, error prompts, and manual e-prescription lookups, ensuring a seamless user experience. I am committed to delivering high-quality, efficient solutions tailored to your project requirements. Let's discuss further details in a chat to dive deeper into the technical approach and integration plan. Looking forward to collaborating on this exciting project. Sincerely, Rajesh Rolen

@alfatrade2

MedicationDispense posting back to Riayati after a MedicationRequest fetch usually needs a local queue table in SQL Server so failed submissions can retry without re-triggering the whole OAuth handshake — is that already in your schema or do I need to design it? Does your MOHAP sandbox already issue the mTLS client cert, or is that still pending from their onboarding team? I've built REST API integrations with token handling and error logging into a backing database, which maps well onto securing and refreshing the OAuth tokens here.

@abhilashr53

You need Riayati FHIR R4 and Tatmeen GS1 serialization wired cleanly into your existing WinForms/SQL Server stack, with proper mTLS, OAuth 2.0, and barcode parsing done right first time. Here is the plan: Week 1 covers OAuth 2.0 plus mTLS setup using HttpClient with certificate pinning, FHIR MedicationRequest fetch by EID, and secure token storage. Week 2 handles MedicationDispense posting, GS1 DataMatrix parser for GTIN/expiry/batch/serial, and Tatmeen B2B REST event registration. Week 3 completes SQL Server schema extensions, execution logging, WinForms UI components for scanning feedback and manual lookups, and full sandbox end-to-end testing. I have built healthcare API integrations involving FHIR R4 schemas, GS1 barcode parsing, and certificate-based authentication in C# production environments. I understand the UAE regulatory context these integrations operate within and the precision they demand. Delivery: 3 weeks to sandbox sign-off, clean layered architecture so your team can maintain it. Do you already have your Tatmeen B2B sandbox credentials and the mTLS certificates issued, or is that still pending?

@GenomyR

Hello, For an online store on Shopify or WooCommerce, the key is a frictionless checkout flow, fast mobile load speeds, and reliable payment webhook handling. I will configure the catalog structure, set up your payment and shipping rules, and make sure customer receipts and inventory sync without a hitch. I can have the complete store setup ready for staging review in 3 business days. Which payment gateways (Stripe, PayPal, or local) and third-party apps do you need configured? Best regards, Tumisang

@AnasNazzal06

Hello, I can help integrate the Riayati (MOHAP) and Tatmeen APIs into your existing C# WinForms application with SQL Server. I can work on REST API integration, JSON handling, barcode parsing, database updates, logging, UI changes, and sandbox testing. I will carefully follow the official API documentation for OAuth 2.0, mTLS, FHIR R4, and Tatmeen integration. Please share the API documentation, sandbox credentials, certificates, and existing project structure so I can review the requirements and begin the integration.

@Digitalizers010

Hi, Riayati and Tatmeen wired into your WinForms app. The mTLS handshake eats days, not the FHIR payloads. How we would do it: one HttpClientHandler holding the client cert and a cached OAuth token, MedicationRequest fetched by Emirates ID then MedicationDispense posted back, every response logged to SQL Server. The DataMatrix parser pulls 01, 17, 10 and 21 with FNC1 handled so serials don't run together. Do you have sandbox credentials already? We've shipped certificate based government API work. Regards, Digitalizers