API-Based Inventory Sync & Excel Upload

@eclairios

Hello, I understand you require a robust inventory ingestion and synchronization layer for your B2B mobile application. My proposal outlines building secure REST APIs for real-time stock data from diverse sources, featuring custom validation, consistent data normalization, and a secure supplier access pipeline. I will also develop intuitive web and mobile components for Excel sheet uploads and sync status visibility, ensuring data integrity and comprehensive error handling. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems Let’s connect and discuss how I can help you with your project. Best regards, Waqas

@OutsourceMan

With experience exceeding nearly two decades, CnELIndia is a trustworthy industry name that can tackle your complex B2B inventory needs head-on. Our strong suite of skills, which includes profound expertise in API development and working seamlessly with Excel manipulations for robust mobile applications, aligns superbly with your business objectives. We have successfully delivered similar projects in the past, ensuring real-time and incremental synchronization while maintaining data integrity. What sets us apart is our meticulous attention to detail in every aspect of software development, from robust error handling & logging mechanisms to thoughtful validations of custom requirements. Our capability in field-by-field data mapping and normalization will help you keep SKUs and quantity formats consistent across multiple platforms. To conclude, our team's extensive test-driven approach ensures that we can demonstrate the reliability of every feature being developed, right down to latency under load. We understand that openness and clarity are paramount during the course of any collaboration; thus, our complete set of Swagger/OpenAPI documentation along with the deployment scripts will make it easier for your team members to take over without any hassle at any point in time. When opting for CnELIndia, you are choosing an incomparable blend of seasoned skillfulness and sheer dedication to delivering your project as per your utmost satisfaction.

@kamran2012

Hello, I will build your inventory sync layer — REST APIs for DRC and third-party connectors, field-level data mapping and normalization, structured error quarantining, and the Excel upload component for web and mobile. For the delta-only Excel uploads, I will hash each row on the client side before submission so the API only processes changed or new records. This keeps payloads minimal under load and pairs well with incremental sync — reducing latency and avoiding redundant writes to your central store. Questions: 1) What format do the DRC and third-party platforms expose their data in — REST, SOAP, flat files, or a mix? 2) Do your existing Android and iOS apps use a shared framework like React Native, or are they fully native? Looking forward to discussing further. Best regards, Kamran

@Srashtasoft

Hi Dear, We will build a scalable API layer (Node.js/NestJS or Python FastAPI) with real-time and incremental sync from DRC and third-party systems. The system will include field-level mapping, normalization, validation rules, and structured error handling with centralized logging and monitoring. Secure supplier access will be implemented using API keys/tokens with role-based permissions and encryption. For Excel integration, we will develop a lightweight web uploader (JS-based) with local validation and delta sync, and extend the same functionality into Android/iOS apps. The solution will be containerized (Docker) and ready for scalable deployment, with full Swagger documentation and automated testing. Questions: ========= What format/API does DRC currently expose (REST, FTP, webhook)? Expected data volume and sync frequency (real-time vs batch)? Do you already have a preferred cloud/infra (AWS, GCP, etc.)? Should mobile upload be native or via existing app framework? Best Regards, Srashtasoft Team

@vishal1145

Your DRC integration will fail silently if you don't implement idempotency keys and webhook retry logic - I've seen three B2B platforms lose inventory accuracy because duplicate API calls overwrote stock counts during network hiccups. Before I map the architecture, I need clarity on two constraints. First, what's DRC's actual rate limit and does your plan support bulk endpoints, or are you forced into paginated calls that'll bottleneck at scale? Second, when you say "delta rows" from Excel - are we talking 50 uploads per day or 500, because that changes whether we need a queue or can process synchronously? Here's the architectural approach: - JAVASCRIPT + EXCEL PARSING: Build a client-side validator using SheetJS that catches schema mismatches before upload, then chunks large files into 500-row batches to prevent timeout failures and memory spikes on mobile devices. - RESTFUL API + DATA INTEGRATION: Design idempotent endpoints with UUID-based deduplication so retried requests don't corrupt inventory counts, plus implement field-level transformation rules that normalize supplier IDs and SKU formats before they hit your database. - DOCKER + KUBERNETES: Package the API layer as stateless containers with horizontal pod autoscaling triggered at 70% CPU, and set up liveness probes that restart pods if DRC webhooks stop responding within 30 seconds. - API DEVELOPMENT + LOGGING: Integrate structured JSON logging with correlation IDs that trace every Excel row through validation, transformation, and persistence - quarantined records get pushed to a dead-letter queue with exact line numbers and failure reasons surfaced in your dashboard. - MOBILE APP INTEGRATION: Expose the same upload API through a React Native bridge so iOS and Android apps can handle file selection natively, then stream progress updates via WebSocket to show real-time sync status without polling. I've built similar multi-source inventory pipelines for two logistics SaaS companies that process 40K SKU updates daily without data loss. I don't take on projects where error handling is an afterthought - let's schedule a 20-minute call to walk through your DRC payload structure and edge cases before I commit to timelines.

@royalwebraisers

Hi, As per my understanding: you need a secure API layer for real-time inventory sync with external sources, plus Excel-based ingestion across web and mobile. I will share my portfolio on your first message. Approach: * REST APIs with validation, mapping, and structured logging * Secure token-based access with monitoring/alerts * Excel uploader with delta sync integration Queries: * Preferred backend stack or open to suggestion? * Expected data volume and sync frequency? I will be looking forward to hearing from you.

@softwarelinkerrs

As an experienced software developer at SoftwareLinkers, I have a deep understanding of API development and RESTful services. Your project requires a robust, secure, and well-documented API suite which aligns perfectly with my skill set. I've developed several backend solutions ensuring efficient data syncing and seamless integration of third-party systems, thus guaranteeing that stock data from DRC and other sources are accurately streamlined to the B2B mobile application in real-time. Your mention of validation rules, structured error handling and logging resonated with me. I prioritize data quality by employing custom validation rules that keep inconsistent SKUs, supplier IDs, and quantity formats at bay. Moreover, at SoftwareLinkers we believe in proactively making it easy to spot problematic areas, so I'll create a comprehensive logging system that'll not only ensure rigorous monitoring but will also guarantee surfaced clear messages. Lastly, my proficiency extends to JavaScript which directly aligns with your requirement of a web Excel uploader that validates data locally before being pushed through the API pipeline. My knowledge in this field also allows for smooth mobile uploads as well as the ability to display sync statuses directly on your Android and iOS apps. With proven results in my previous projects(replace with specific data if available), let's ensure complete data integrity while simultaneously achieving comprehensive error logs

@technologiesit

As a veteran Full Stack Developer and a Digital Solutions Expert, I bring a wealth of expertise that could directly align with your project's specifications. With over 10 years in the industry, I have successfully handled more than 100 similar projects offering data integrations and developing mobile applications, using my skills in Data Integration, JavaScript, and Mobile App Development. My commitment to ensuring fast delivery without compromising on the work quality coupled with my proven track record in project completion is why you can count on me to see this job through. My proficiency in JavaScript is particularly crucial for developing the lightweight component that facilitates Excel uploads on your web front-end & mobile apps. I would ensure that staff can easily drag-and-drop an Excel sheet while the component validates it locally and pushes through the API pipeline only delta rows to provide a real-time and incremental sync of product details. Rest assured that I will deliver not just bare-bones functional solutions but meticulously tested end-to-end codebase including unit/integration tests needed for this project; while maintaining meticulouis documentation of all deliverables. Choosing me guarantees not only the fulfillment of your project requirements but also comprehensive maintenance support over time, as I value long-term professional relationships. Thank you for considering my proposal - I look forward to joining forces with you!

@fullstack0407

I have read your job post and I understand you need a secure inventory sync system with APIs and Excel upload support. I am a full-stack developer with experience in REST APIs, data sync, and backend systems. I have built systems with real-time sync, API integrations, data validation, and logging. I also have experience with mobile and web upload features. My approach is to build REST APIs with clear structure and Swagger docs. I will create connectors for DRC and other platforms, add data mapping, validation, and error handling. I will set up secure access with tokens and encryption. Then I will build a web Excel uploader and mobile upload feature with delta sync. My solution will be a reliable, scalable system with clean APIs, strong security, and easy data handling across all platforms.

@AZTURK1

Hi there, I will build a secure, production-ready REST API layer to ingest and incremental-sync DRC and third-party inventory feeds, with Excel delta uploads on web and mobile , I’ve built similar API + mobile upload modules and Docker/K8s deployments for B2B apps. - Production-ready API suite with OpenAPI/Swagger, OAuth2/API-key auth, role-based permissions and encrypted storage - DRC and third-party connectors with field-by-field mapping, normalization rules, and delta sync logic - Web drag-and-drop Excel uploader (client-side validation) and mobile modules (Android/iOS SDK integration) delivering delta rows to the same pipeline - Post-deploy validation: automated test suite, load latency checks, and a rollback plan (backup checkpoint + staged deployment) Skills: ✅ RESTful API ✅ DRC connector / third-party integrations ✅ Data mapping & delta sync workflows ✅ Docker / Kubernetes deployment ✅ Security: API keys, token auth, TLS, encryption at rest Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m available to start immediately; Is this already running on a live production server or should I prepare a staged environment for integration testing? Best regards,

@mkh559a5a1fd66e9

As a seasoned full-stack developer with over 14 years of experience, I have not only comprehensive expertise but also deep-commitment to providing high quality and maintainable code. These two qualities will be paramount in delivering the key requirements of your project - a reliable REST API that ensures real-time and incremental sync, a structured error handling system with clear messages, and proficient data mapping for consistent SKUs information. Furthermore, my extensive skills in different frameworks including JavaScript and Xamarin are crucial for implementing the Excel integration you require. My work embodies precision, efficiency and excellent teamwork skills important for this multi-interface feature. Lastly, my knowledge in Docker which you've mentioned as preferred although not mandatory, is an added value for me to help with the smooth deployment of your project. To sum it up, by choosing me you'll get an expert in all areas relevant to your project who is committed to delivering comprehensive documented results that'd be up to your expectations and provide the highest level of security for your data. Let's collaborate!

@mayankinnovative

Hi, As per my understanding: You need a secure inventory ingestion and sync layer that aggregates stock, product, and supplier data from DRC and third-party systems into unified REST APIs. The system must support real-time and incremental sync, enforce strict validation, normalize data across sources, and provide secure supplier access. Additionally, an Excel upload feature should validate and push delta updates via web and mobile apps, with full observability and testing for reliability. Implementation approach: I will design a modular API layer (Python-based, likely FastAPI) with clear service separation for ingestion, validation, mapping, and sync orchestration. Connectors for DRC and third-party platforms will support both polling and webhook-based updates. Data normalization will use configurable mapping schemas. Security will include token-based auth, RBAC, and encryption standards. केंद्रीकृत logging (ELK or similar) with alerts will track failures. The Excel uploader will use a JS parser for client-side validation and delta detection, while mobile SDK endpoints mirror the same flow. Final delivery will include Dockerized deployment, OpenAPI docs, and full test coverage. A few quick questions: 1. What is the expected data volume and sync frequency? 2. Do you already have mapping rules defined or should they be designed? 3. Any preferred cloud or deployment environment? 4. Should mobile uploads support offline queuing?

@chiragardeshna

Hi there, Strong alignment with this project comes from experience building high-throughput API systems with real-time data sync, validation pipelines, and scalable integrations. Clear understanding of your requirement to develop a secure inventory sync layer with external API connectors, structured data normalization, Excel ingestion, and centralized logging with monitoring. Expertise across REST API design, Node/Python backends, and mobile/web integration ensures reliable sync workflows, delta processing, Swagger documentation, and seamless Excel uploads across platforms. Risk is minimized through strict validation layers, encrypted data handling, role-based access control, and robust logging with alerting for failure tracking. Available to start immediately happy to share a quick demo or discuss next steps. Recent work: https://www.freelancer.com/u/chiragardeshna Regards Chirag

@ParasTech7

I have 21 years of experince, built warehouse management system and school erp in Java and Spring boot, microservices using threads and Java concurrency. I have built independent modules, persistent query using objection js and sequalize and built aggregation pipelines too. I can generate PDF, make comprehensive dashboard, and whatsapp integration. I can build your apis, integrate it and develop a mobile app.

@ModernTechno442

As a Google partner digital agency, our team at XYZ has the requisite expertise in handling complex and large-scale API development projects to meet your needs. With a focus on ensuring data integrity and superb user experience, we have successfully crafted robust solutions for companies worldwide for more than 7 years. Our track record speaks volumes regarding the quality and efficiency we bring to the table. Our proficiency in API development, JavaScript, and Mobile App Development perfectly aligns with your project requirements. We understand the significance of real-time and incremental sync of stock data as well as field-by-field data mapping for consistency - and integrate them into our deliverables seamlessly. The implementation of role-based permissions along with supplier access pipelines has always been one of our core competencies.

@Shrutibimpl

Hello There, You want a unified inventory synchronization engine for your B2B mobile platform. I will build a secure API layer that aggregates stock from DRC and external suppliers while providing real time visibility and mobile Excel upload capabilities. 1) Do your external suppliers currently expose their inventory via REST APIs or will we need to build custom connectors for different protocols? 2) Should the system prioritize specific sources during a data conflict when the same SKU is reported by multiple platforms? 3) Are you looking to implement a specific mobile framework like Flutter or React Native for the cross platform Excel upload feature? We will turn your fragmented stock data into a single source of truth that your B2B customers can rely on every time they place an order. By automating the sync from multiple suppliers, you eliminate the risk of overselling and free your staff from the manual grind of updating quantities. You get a reliable system where local and remote data stays perfectly aligned, and your team can update thousands of records with a simple drag and drop from their phones or computers, giving you total control over your inventory lifecycle. Best regards, Bharat Joshi

@KarthikTechCon

Hi, I’m Karthik with 15+ years of experience building **API-driven inventory sync systems**. I can deliver a **robust ingestion + normalization pipeline** with real-time and incremental sync. **Approach:** • Backend: FastAPI/Node.js with clean REST APIs • Connectors for DRC + third-party platforms • Field mapping, validation, and error quarantine • Secure access (API keys, RBAC, encryption) **Excel integration:** • Web drag-drop uploader (validate + push delta rows) • Mobile upload support (Android/iOS) with sync status **Reliability:** • Centralized logging, monitoring, and alerts • Scalable (Docker-ready) architecture **Deliverables:** • Production APIs + Swagger docs • Working connectors + upload modules • Source code + tests + deployment scripts I focus on **data accuracy, performance, and stability**. Ready to start immediately.

@Andyloredo

Building a secure and robust API layer for inventory synchronization demands careful attention to data validation and error handling – especially when dealing with diverse data sources. I've previously built similar data ingestion pipelines using JavaScript and RESTful APIs, focusing on custom validation and structured logging to ensure data integrity, and I'm confident I can deliver a solution aligned with your requirements. I’ll prioritize the secure supplier access pipeline with role-based permissions and encryption, ensuring compliance with your security needs.

@jagratip3

Hi there, I can build a robust, production-ready inventory ingestion and synchronization layer tailored for your B2B application. I’ve worked on scalable API systems, real-time data pipelines, and multi-source integrations with strong validation, security, and observability. Approach: I’ll design a modular REST API layer (Python/Node.js) with clean architecture, supporting real-time and incremental sync using queue-based processing (e.g., Kafka/RabbitMQ if needed). Each connector (DRC and third-party platforms) will follow a unified adapter pattern for consistent ingestion, transformation, and normalization (SKU, supplier IDs, quantities). Validation rules will be enforced at the pipeline level with structured error handling—invalid payloads will be quarantined, logged, and surfaced via dashboards. Security will include API key/token auth, RBAC, and encryption (HTTPS + at-rest strategies). For Excel integration, I’ll build a lightweight JS uploader (drag-drop, client-side validation) that sends only delta changes. The same API endpoints will be exposed for Android/iOS integration with sync status tracking. Clarifications: Preferred stack (Node.js vs Python)? Expected data volume and sync frequency? Any existing auth system to integrate with? Cloud preference (AWS/Azure/GCP)? I can start immediately and deliver in structured phases. Best Regards, JP