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I need a clean, production-ready bridge between my Oracle APEX application and Zatcca that pushes and pulls data automatically. The scope is limited to real-time data synchronization only—no reporting layers or extra authentication flows are required on your side. What must move seamlessly are two JSON payloads: customer records and their related transaction details. Whenever a customer profile or a sale is created, updated, or voided in APEX, the same change must appear in Zatcca within seconds, and vice-versa. Conflict handling, basic auditing (timestamp + user ID), and retry logic for temporary API failures have to be baked in. I already have APEX 22.x running on Oracle 19c; Zatcca exposes a REST API with OAuth2. Your deliverable is: • APEX PL/SQL packages and REST data sources that post, fetch, and reconcile customer and transaction objects. • A small interactive dashboard page in APEX so I can monitor sync health, view last-run stats, and manually trigger a re-sync if needed. • Brief deployment notes so my DBA can install it in test and prod. Use native APEX RESTful Web Services, ORDS, and standard PL/SQL—no third-party middleware. Error handling must surface meaningful messages in the APEX UI and write to a log table for later review. I’ll provide API keys and a sandbox schema as soon as we agree on the approach. Looking forward to a straightforward, well-documented solution that I can roll out with minimal oversight.
Project ID: 40550591
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36 freelancers are bidding on average $59 USD for this job

I HAVE RELEVANT EXPERTISE integrating Oracle APEX with REST APIs using native PL/SQL, ORDS, and OAuth2, including real-time synchronization, retry logic, and audit logging. Which ZATCA API version are you using? Should APEX or ZATCA act as the primary source during data conflicts?
$100 USD in 7 days
5.4
5.4

Hi, I am oracle certified APEX developer, with over 5 years experience in custom APEX application developments and integrations. Please provide more info on this. Thanks
$50 USD in 3 days
4.1
4.1

As a Software Development Studio, API Integration and Database Management are the cornerstones of our skill set. This makes us extremely well-suited to tackle your Oracle APEX-Zatcca Real-Time Sync project head-on. We understand the importance of clean, reliable data synchronization - without compromise. With our in-depth knowledge of Oracle APEX, RESTful Web Services, and PL/SQL, we can build a stable bridge between your systems that won't introduce unnecessary risks or dependencies. Moreover, our experience spans across multiple industries and international clients. This has given us great proficiency in adopting different technologies quickly and developing tailored solutions on time and within budget. Blending simplicity with scalability is something we prioritize so that your business experiences minimal disruptions even during scaling or major upgrades. Overall, partnering with Solves Inn for your project will grant you a technologically adept and reliable hand that remains committed to your business's specific needs throughout the project duration and beyond. We'll ensure a straightforward process with thorough documentation for easy auditing while delivering a system that will provide meaningful error-handling messages surface in the APEX UI that will be critical for any future troubleshooting. Let's turn your ideas into a high-impact digital solution!
$30 USD in 1 day
3.7
3.7

With over a decade of hands-on experience in software engineering, particularly SQL, I'm confident that we can design a comprehensive and efficient solution for your Oracle APEX-Zatcca Real-Time Sync project. We understand the nuances involved in real-time data synchronization and appreciate your emphasis on using native APEX RESTful Web Services, ORDS, and standard PL/SQL without any third-party middlewares. Drawing on a wide range of full-stack development skills and the ability to integrate disparate systems, my team has built APIs, web applications, and enterprise software that ensure smooth data flow across various platforms. Our approach to error handling aligns perfectly with your requirement of surfacing meaningful messages in the APEX UI while writing logs for further analysis—a crucial feature for audit and reconciliation. We are an internationally experienced team with clients in the USA, UK, Canada, Australia, Europe, and across the globe. We understand the significance of clear communication throughout projects like these to ensure alignment and avoid delays. Rest assured that if you choose us for this project, you'll receive not just a robust solution but also long-term support whenever needed.
$10 USD in 7 days
3.7
3.7

With your need for real-time data synchronization between Oracle APEX and Zatcca, my skills in API Integration, REST API, and SQL make me the perfect fit for this project. As an experienced Full Stack Developer, I have a deep understanding of how to leverage the power of native APEX RESTful Web Services, ORDS, along with standard PL/SQL to create seamless bridges between platforms. Furthermore, I understand the importance and value of clean code that ensures proper error handling and meaningful message surfacing—an aspect that's crucial for a task as critical as this. In terms of experience, I've had the opportunity to work on multiple projects involving data synchronizations and have proven my ability to deliver robust solutions under tight deadlines. This includes not only ensuring data accuracy but also incorporating conflict handling and retry logic for temporary API failures—both features you've explicitly mentioned needing. Lastly, given my proficiency in documentation and Microsoft Word & Excel, I can provide well-detailed deployment notes to ensure smooth installation by your DBA. My goal is to not just complete your project but also facilitate its integration into your system—requiring minimal oversight from your end. Let's collaborate and turn your vision into reality!
$30 USD in 1 day
2.9
2.9

Hi, what you need is a deterministic, bidirectional sync layer where Oracle APEX remains the system of record for some events while Zatcca remains authoritative for others, and the real challenge is ensuring idempotency and conflict-safe reconciliation rather than just sending REST calls between systems. I would build this using native ORDS RESTful services and PL/SQL packages that encapsulate all outbound and inbound sync logic, with structured payload mapping for customer and transaction objects so every create, update, or void event is captured consistently and replay-safe. On the technical side, I’d implement a queue-based pattern inside Oracle (sync log table with status flags) to handle retries, transient API failures, and ordering guarantees, plus OAuth2-secured REST integrations for Zatcca with proper token refresh handling. The APEX layer would include a lightweight monitoring dashboard showing sync status, last successful runs, failed payloads, and manual reprocessing controls, all driven directly from database views so DBA deployment remains simple and transparent. Error handling would surface meaningful messages in APEX while also persisting full audit trails (timestamp, user ID, payload snapshot) for traceability and debugging. Best regards, Muhammad Saad K
$15 USD in 5 days
2.3
2.3

❤️ Hi there, ❤️ I understand you need a real-time sync bridge between Oracle APEX (19c/22.x) and Zatcca via REST/OAuth2 for customers + transactions, with retry logic, audit logs, and bi-directional sync. I’ve worked on APEX/ORDS PL/SQL integrations and REST API syncing, and can build native packages + REST data sources with proper error handling and conflict management. I can also add a simple APEX page to monitor sync health and trigger re-syncs. Let’s connect. Best regards, Binaya T
$10 USD in 1 day
1.9
1.9

Hi, I will engineer a clean, production-ready REST synchronization bridge built entirely on native Oracle APEX PL/SQL architectures to automatically stream customer records and transaction JSON payloads between your APEX 22.x/Oracle 19c environment and Zatcca. Drawing on my technical background with full-stack enterprise database frameworks, advanced API orchestration, and low-latency data pipelines, I will implement this real-time integration strictly using native `APEX_WEB_SERVICE` calls and standard PL/SQL packages, entirely omitting the friction of third-party middleware. The backend packages will feature an OAuth2 authentication handler, a robust retry queue for transient API timeouts, and a strict deterministic conflict-resolution system backed by an audit trail logging the exact timestamp and user ID of each mutation. I will also build the requested, clean interactive dashboard page in your APEX application to display live synchronization health metrics, execution histories, and an immediate manual re-sync override tool, pairing it with straightforward deployment scripts tailored for a quick DBA installation. To ensure an immediate technical kickoff, does your local network architecture require us to route these outbound Zatcca REST calls through an explicit corporate proxy server, or can the database server communicate with the external API endpoints directly? Let's discuss this project in more detail including final cost.
$20 USD in 7 days
2.1
2.1

Your integration needs to be reliable under real-world conditions, so the priority is keeping Oracle APEX and ZATCA synchronized without missing or duplicating updates. I'd build the solution using native APEX REST Data Sources, ORDS, and PL/SQL packages, with a dedicated synchronization layer for customer and transaction objects. The biggest challenge is handling concurrent updates and temporary API failures, so I'd implement retry logic, conflict resolution, audit logging, and idempotent request handling to ensure data stays consistent in both systems. I'll also create an APEX monitoring page showing sync status, last-run metrics, error logs, and a manual re-sync option, along with deployment notes for your DBA. Does the ZATCA sandbox already expose webhook callbacks for change notifications, or will synchronization rely entirely on API polling from both systems?
$1,000 USD in 7 days
1.8
1.8

Hi, I `m baehaki. I understand you want to build a real-time sync bridge between Oracle APEX and Zatcca, and I can deliver it with a clean, practical solution. I will first review your current requirements, existing setup, and any technical limits. Then I will build the main synchronization flow step by step, test the result carefully, and make sure everything works smoothly before delivery. For any custom feature, API, database, or third-party integration, I will also check possible risks early and solve them in a stable way. I have worked with APEX, ORDS, REST services, and PL/SQL implementations that need reliable data movement, retry handling, and clear operational visibility. For your project, I will focus on customer and transaction payload sync, conflict handling, audit logging, and a simple APEX dashboard for health monitoring and manual re-sync. I will also prepare concise deployment notes so your DBA can install it cleanly in test and prod. I can complete this with clear communication, clean implementation, and reliable testing. Best regards. Bae
$15 USD in 1 day
1.1
1.1

The trickiest part here is the cryptographic signing Zatcca requires for each invoice submission. If the signature fails or the API times out, invoices drop silently and that becomes a compliance problem. I can build the bridge with retry logic and proper error handling baked in, and have it running in 3 days. Available to start today. The bid reflects what is in the description. Once we walk through the full scope, including invoice types, UBL XML needs, and expected volume, the numbers may adjust. Want to jump on a quick call?
$30 USD in 3 days
1.0
1.0

Hi, I'd build this entirely with native APEX RESTful Web Services and ORDS — PL/SQL packages handling OAuth2 token management, the customer and transaction sync logic, and a log table capturing every attempt, success, and failure with timestamps and user IDs. The key is getting the retry and conflict logic right at the database layer, since that's what determines whether this bridge quietly self-heals from a dropped connection or silently loses data during a Zatcca outage. In similar projects I've built APEX-to-external-API integrations using native REST data sources and PL/SQL, including sync dashboards for monitoring health and manual re-sync triggers, all without third-party middleware. Share the sandbox schema and API keys once we're aligned and I'll get the deployment notes ready for your DBA — let's get this built clean.
$20 USD in 2 days
0.0
0.0

Hi, this is Joshua from Davis. I build reliable Oracle APEX solutions and backend integrations. I understand you need a clean real time bridge between Oracle APEX and Zatcca. Your goal is to keep customer and transaction data in sync both ways, with conflict handling, audit logs, retry logic, and clear APEX visibility. I can build a production ready PL SQL sync layer with REST data sources, ORDS, and a simple monitor page. I would use APEX packages to post, fetch, and reconcile JSON payloads through the Zatcca REST API. I would add a log table, retry queue, and sync status tracking so errors are visible in the UI and easy to review. The dashboard will show last run stats and allow manual resync when needed. I can communicate in real time in your time zone and can provide a simple demo or part of the project within 12 hours of starting. Q1: Do you want the sync to run by triggers, scheduled jobs, or both? Q2: Can you share the Zatcca API docs and sample customer and transaction payloads? Q3: Do you need one way conflict rules, or should the latest update always win? Best regards, Joshua
$25 USD in 4 days
0.0
0.0

Will integrate Oracle APEX with Zatcca using their API for real-time data synchronization. Built a robust solution that pushes and pulls customer records and transaction details. Delivered a production-ready bridge with seamless JSON payload handling. Ready in 2 days. How do you handle authentication and authorization in Zatcca?
$50 USD in 7 days
0.0
0.0

✨ Wishing your Oracle APEX and Zatcca integration delivers flawless real time synchronization, dependable performance, and a reliable foundation for your business operations! ⭐ Hello, I'm Lewis. I have experience building secure API integrations with Oracle technologies, REST services, and PL SQL, focusing on maintainable architecture and dependable data synchronization. ✨ I can develop native APEX packages, ORDS REST integrations, reconciliation logic, retry handling, conflict management, audit logging, and a lightweight dashboard for monitoring sync status, viewing logs, and manually triggering synchronization without relying on third party middleware. ⭐ The solution will include clean source code, meaningful error reporting within APEX, comprehensive deployment notes, and thorough testing for production readiness. ✨ Would you like the synchronization to operate through database event triggers for near instant updates, or would a scheduled background job running every few seconds better match your deployment environment? ⭐ Looking forward to working with you. Have a wonderful day!
$10 USD in 2 days
0.0
0.0

Greetings, I recently worked with a small company called TechSync Solutions, where I developed a real-time data synchronization bridge similar to what you need for your Oracle APEX application and Zatcca. They required seamless integration to ensure that customer records and transaction details were updated instantly across their platforms, which I delivered using native APEX RESTful Web Services and PL/SQL. For your project, I’ll create the necessary APEX PL/SQL packages and REST data sources that will handle the push and pull of the JSON payloads. I’ll also set up a dashboard to monitor sync health and manage any manual resyncs. Error handling will be straightforward, providing clear messages in the APEX UI while logging details for future reference. I look forward to delivering a clean, well-documented solution for you.
$30 USD in 1 day
0.0
0.0

I can develop a clean, production-ready bridge between your Oracle APEX application and Zatcca for real-time synchronization. My experience includes building robust integrations with Oracle APEX that ensure reliable and efficient data flow. I focus on creating stable, secure connections that handle real-time updates without data loss or delays. Do you already have the API documentation for Zatcca, or will that be part of the scope?
$20 USD in 7 days
0.0
0.0

hello, i have experience working with oracle apex, oracle 19c, pl/sql, ords, rest api integrations, oauth2, json payload handling, and real-time data synchronization workflows. from my understanding, you need a production-ready sync bridge between oracle apex and zatcca for customer records and transaction details. the sync should handle create, update, and void actions in both systems, include conflict handling, retry logic, audit logging, and a small apex dashboard to monitor sync status and manually trigger re-sync when needed. i can build the pl/sql packages, configure apex rest data sources, implement api calls and reconciliation logic, create log tables, surface meaningful errors in the apex ui, and provide deployment notes for test and production rollout. best regards, dharam
$20 USD in 1 day
0.0
0.0

Hi, I can help with this backend/API task. I would confirm the expected inputs and outputs, implement the first working endpoint/script/fix, add basic error handling, run a smoke test, and document setup. Starting with a small working slice keeps delivery fast and easy to review.
$30 USD in 3 days
0.0
0.0

I've built similar bi-directional sync solutions between Oracle APEX and third-party REST APIs. I'll deliver the complete PL/SQL package suite for customer and transaction sync, including conflict detection with timestamp-based reconciliation, exponential backoff retry logic for Zatcca API calls, and a full audit trail in your sync log table. The interactive dashboard will show last sync timestamps, record counts, error summaries, and include manual trigger buttons for both directions. Everything uses native ORDS and APEX REST data sources with meaningful error surfacing in the UI and backend logging. I'll include clear deployment SQL scripts and setup notes for your DBA covering test and production environments.
$10 USD in 4 days
0.0
0.0

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