Senior .NET Developer – Biometric Device Gateway & Scalable HRMS Architecture

@rajat07me

With your HRMS project, I understand that security and efficiency are of utmost importance. As a seasoned freelancer with over a decade of experience, I am confident in my ability to deliver on these key aspects and more. Having worked extensively with ASP.NET WebForms and SQL, I have a deep understanding of how to build robust and secure systems - skills I have sharpened building various complex systems like ERP, HRM, CRM systems and other similar applications. What sets me apart is my diverse skill set. In addition to being an expert in web development using HTML and SQL, my wider range of skills includes Website Design, SEO, Paid marketing specializing in Google Ads, Facebook/Instagram Ads, LinkedIn Ads, TikTok Ads and more which could be beneficial to your public-facing HRMS application where a user-friendly design is crucial. Moreover, as the head of **360 Elevate**, my team that comprises professionals in development, design, marketing, QA, automation etc., could bring in an added advantage assuring a comprehensive HRMS solution that addresses all your business needs effectively. Having delivered numerous successful projects over the years, building reliable digital solutions isn't just our work-it's our passion. And with **360 Elevate**, you also get reliability and long-term sustainability for your project. Choosing us means choosing expertise; it means choosing a digital partner who will not only meet but exceed your expectations.

@Microlent

The real challenge here is not just moving biometric TCP communication into a separate service. If the current socket handling, database writes and attendance logic are tightly coupled, simply extracting code can move the bottleneck rather than solve it. I would start by tracing the existing device communication and attendance-processing flow, then separate responsibilities incrementally: independent TCP gateways for persistent connections, queue-based event ingestion, Redis for distributed device state, and separate workers for ingestion and attendance processing. The Web Forms HRMS can remain operational while the high-volume workload is isolated. One area I would validate before locking the architecture is what “100,000+ devices” means in practice—total devices, concurrent TCP connections, or peak events per second. That directly affects gateway sizing and broker selection. I would also design event processing to handle retries, duplicates and backlog safely, since attendance data cannot rely on simple at-most-once delivery. Portfolio: https://www.freelancer.com/portfolio-items/11539740-microlent-systems-portfolio If you share the existing architecture/source structure, I can discuss a practical migration path without unnecessarily rewriting the HRMS. Jenifer

@ykarora26

With a solid background in ASP.NET WebForms and SQL, I understand the importance of developing a secure and user-friendly HRMS application. Could you elaborate on the unique features or customization needed to ensure the application aligns perfectly with your HR processes? Regards, Yogesh Kumar

@ranjika08

Building an HRMS web application demands a developer with a deep understanding of the HR processes and technology. With 12+ years of experience, I've honed my skills in building secure, scalable, and user-friendly systems which align perfectly with your project needs. My proficiency in ASP.NET WebForm and strong SQL management skills ensure I can develop the essential modules of Employee Management, Payroll, and Leave Management efficiently. Furthermore, I have previously worked on similar HRMS projects which have given me a robust understanding of such systems. This enables me to create intelligent solutions that improve the overall productivity and efficiency of HR processes. Moreover, my adherence to security protocols guarantees utmost confidentiality over your employee data. A successful public-facing web application should be more than just functional—it should be intuitive and engaging. My broad skill set includes website design and development for various platforms - including ASP.NET which making me adept at building dynamic yet interactive forms essential for your project. Overall, I am confident I can create an exceptional HRMS app that meets all your requirements while ensuring it resonates seamlessly with your audience needs. Let's get started on turning your dream into reality!

@vishal1145

Your current architecture has a single point of failure that will cause complete HRMS downtime when device traffic spikes above your connection pool limit. Without isolating the TCP layer into an independent gateway with its own resource allocation, you're one traffic surge away from a production outage that locks out payroll processing. Quick questions - what's your current peak concurrent device connection count, and are you already experiencing database deadlocks or connection pool exhaustion during attendance punch windows? And what's your target RTO if the device gateway fails independently? Here is the architectural approach: - TCP/IP SOCKET PROGRAMMING: Build persistent connection manager using .NET Core Worker Services with async I/O to handle 100K+ devices without blocking threads, isolating device protocol parsing from HRMS business logic. - KAFKA/RABBITMQ MESSAGE QUEUE: Implement event-driven ingestion pipeline where device gateway publishes raw punch events to Kafka topics, decoupling device availability from attendance processing SLA. - SQL SERVER OPTIMIZATION: Refactor existing stored procedures to use table-valued parameters and eliminate row-by-row processing that's currently causing lock escalation during bulk attendance imports. I've architected similar device-to-cloud separation for a manufacturing IoT platform handling 50K+ sensors with zero HRMS impact during traffic spikes. Let's schedule a 20-minute architecture review call where I walk through your existing codebase structure before proposing the migration path.

@technologiesit

As someone who has spent over a decade crafting powerful digital products, I'm confident that I can deliver the robust, secure and efficient HRMS web application you're seeking. My extensive experience with ASP.NET WebForms, SQL, and HRMS applications align perfectly with your project requirements. I understand the significance of a user-friendly public-facing website particularly for an HRMS system that handles sensitive data. My proficiency in coding is accompanied by a strong aptitude for designing secure systems that protect user data. With my skills in .NET and Web Development combined with my HTML knowledge for a responsive design, I can ensure your application adheres to top-notch security protocols while also delivering the necessary functionalities like employee management, payroll, leave management, and more. One of my key strengths is my ability to turn ideas into reality by understanding business needs deeply. I've maintained a 95% on-time delivery record because I value upfront communication and zero delays. Investing in my services will not just ensure you have an efficient HRMS web application but also a long-term partner for maintenance and any technical support you may need post-handover. Let's begin building something amazing that will drive results for your business together.

@akshaybhagwat76

***HRMS EXPERT** Most of the proposals here are answering an HRMS employee/payroll/leave scope that's not what you described. The actual problem is a resource-contention issue: biometric TCP/IP traffic and HRMS business logic sharing the same process, so a spike in device connections starves the application of CPU/DB connections. The fix isn't more HRMS features it's decoupling. My approach: extract an independent Biometric Device Gateway as a .NET Core Worker Service, holding persistent TCP/IP connections per device and pushing raw attendance events onto a message queue (RabbitMQ, given your team likely wants lower ops overhead than Kafka at this device count — happy to align on either). I have 8+ years of real-time IT experience with .NET, C#, and SQL Server, including multithreaded/async processing and REST API design. I want to be upfront: hands-on production experience specifically with Kafka/RabbitMQ and Redis at scale is something I'd be applying carefully rather than claiming deep prior mastery of — the underlying async/worker-service and API design patterns are strong ground for me, but I want that clear before you screen further. Before scoping precisely: what's the current device connection count at peak, and is there a hard ceiling on downtime for the existing HRMS during the cutover? Akshay B

@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

@Hrolgar

First move is pulling the device socket handling out from under the Web Forms process without touching the HRMS codebase at all, that's what actually stops device load from taking the app down, and it's a separate deployable from day one rather than a refactor bolted onto the existing solution. The gateway sits in front of the devices as its own persistent connection service, publishing raw punch events onto Kafka or RabbitMQ rather than writing straight to SQL Server. Ingestion workers consume off the queue, normalize attendance records, and push them into the existing database through the same schema the HRMS already reads, so the Web Forms side keeps working exactly as it does now, just reading data that arrived through a buffer instead of a live socket write. Redis sits between the workers and the DB for device state and dedup, which is what keeps a burst of reconnecting devices from turning into a write storm. 250,000 INR over 21 days, milestoned so you're not funding rearchitecture on faith: M1: protocol audit and gateway scaffold, connection handling only, 50,000 INR, 4 days M2: TCP gateway service wired to Kafka or RabbitMQ ingestion, 55,000 INR, 5 days M3: Redis backed attendance workers writing into the existing schema, 50,000 INR, 4 days M4: secure API layer between gateway and HRMS, 50,000 INR, 4 days M5: load test toward the 100k device target, failover pass, scaling notes, 45,000 INR, 4 days That split covers a clean extraction plus a real scale test against the number you've named. What's not in the brief is how many devices are already talking to the current server and at what message rate, and that's the piece that would move this number once I've seen the existing TCP handling code.

@jiyayadav

Hello, I'm Sanjay, 10+ years experience in .NET/C#, distributed systems, and backend performance architecture. What I understood: Extract biometric device communication from the existing ASP.NET Web Forms HRMS into an independently scalable gateway — persistent TCP/IP handling, load-balanced servers, Kafka/RabbitMQ queuing, Redis for device state, and separate ingestion/processing workers — while HRMS stays untouched, scaling toward 100,000+ devices. Key risk I'd flag: the real challenge isn't building the new gateway — it's the cutover. I'd run the gateway writing to the queue in parallel with the existing path before decommissioning it, so data integrity is proven, not assumed. My approach: Audit existing device-comm and attendance code first to map coupling points, then build the Gateway as a .NET Worker Service with persistent sockets, publishing to Kafka/RabbitMQ, consumed by separate workers writing to SQL Server, with Redis tracking live connection state behind a secure API to HRMS. Questions: Is the device protocol proprietary or a documented standard? Target load now vs. long-term 100,000-device goal? Regards, Sanjay

@Dinfo12

With over 3 years specializing in .NET development and distributed systems, I firmly believe I'm the perfect fit for your Biometric Device Gateway and HRMS Architecture project. My expertise ranges from ASP.NET Web Forms to TCP/IP socket programming, .NET Core to REST API, and more. I am well-versed in multithreading and async programming, which are essential for ensuring the scalability and performance optimization you desire. Additionally, my knowledge of Kafka, RabbitMQ and Redis will ensure the design of efficient message queues and reliable device connection management. My experience extends beyond just coding; I have valuable insight gained over 8 years in overcoming challenges faced during the implementation of large-scale projects. This experience will prove invaluable while restructuring components of your existing application to accord with your new architecture design. Moreover, as a freelancer who understands the significance of communication, I assure you daily progress reports via your preferred platform. Best Regards Ashish

@chetanprajapat

I’ve gone through the HRMS scope carefully, and the important part is getting the employee, payroll and leave workflows backed by a reliable SQL data model while keeping authentication and employee data properly protected. I can build the ASP.NET WebForms application around these core modules, including secure registration/login, employee records, payroll processing, leave workflows, CMS functionality and dynamic forms. The implementation will focus on clear role-based workflows, responsive screens, validation, secure data handling and maintainable SQL/database structure rather than treating the HRMS as a collection of disconnected pages. I’d also structure the application so the public-facing portions and authenticated HR workflows remain clearly separated, making future modules easier to add without disrupting the existing system. Share the detailed HRMS workflow, user roles and payroll/leave rules, and I can map the database structure and development milestones before implementation.

@TechWagger2026

As an HRMS WebApp developer, my extensive 14 years of experience aligns perfectly with your project requirements. With a deep understanding of ASP.NET WebForms and SQL, I am well-positioned to build a robust and efficient HRMS solution that empowers your organization to effectively manage employee data, payroll, and leave information. What sets me apart from other freelancers is my end-to-end expertise in Web Development including HTML, CSS and backend tools like VB.NET and C#. I can ensure secure user registration and login features for your HRMS application, implementing comprehensive content management systems while offering you interactive forms for dynamic user input. My experience in a wide range of industries that includes Online Delivery, Real Estate, Medical, Education will work in your favor by incorporating the best industry practices into the project. Lastly, my skills also extend to ensuring the responsiveness of public-facing websites which aligns well with your requirement of a public HR system. I prioritize my clients' satisfaction above all else. So if you're looking for a dedicated, experienced professional who can provide top-notch service in line with your objectives, then I'm the right fit for you!

@KarthikTechCon

Hello, I’m Karthik, with over 15 years of experience in .NET development and distributed systems. I specialize in scalable architectures and have successfully handled complex projects similar to your Biometric Device Gateway and HRMS application. I understand the critical need to separate the biometric communication layer to optimize performance and ensure the HRMS remains unaffected during high traffic. My approach will focus on: 1. Designing an Independent Biometric Device Gateway: Using persistent TCP/IP connections and implementing effective load balancing. 2. Utilizing Kafka/RabbitMQ: For robust message queuing and ensuring scalability. 3. Integrating Redis: For efficient device connection management. 4. Developing Secure APIs: To maintain seamless communication between the gateway and HRMS. I’m well-versed in .NET, C#, ASP.NET Web Forms, SQL Server, and distributed systems. I also have experience with multithreading, performance optimization, and REST APIs, making me an ideal candidate for this project. I look forward to discussing how I can help enhance your application’s architecture. Best, Karthik

@techsty2014

Hi there, We will architect and build the independent Biometric Device Gateway, separating the TCP/IP device communication layer from your existing ASP.NET Web Forms HRMS so device traffic never impacts core HR operations. The critical piece is the gateway's connection management. We will use .NET Core Worker Services for persistent TCP/IP connections, with Redis tracking device state and heartbeat across multiple gateway instances. Kafka will decouple raw biometric data ingestion from attendance processing, so each layer scales independently. Your existing HRMS stays untouched, consuming processed attendance data through secure REST APIs. A couple of quick things to confirm: 1) What biometric protocols are the devices using (ZKTeco Push/Pull, OSDP, proprietary), and roughly how many devices are active today? Looking forward to your response. Best regards, Faizan

@NEHABHAT92

Being in the web and mobile app development field for more than 9+ years, I, Neha, truly understand the essence of a robust and secure HRMS application. My expertise lies in HTML/HTML5/CSS and Web Development; both of these skills are imperative for anyone working on an app like this. Alongside that, my experience in Java and .NET adds an extra edge to my capabilities as these will help me ensure a user-friendly environment on your website. Further strengthening my profile is proficiency in PHP and its frameworks, ensuring smooth database management using SQL won't be a problem as I've dealt with similar projects before! Implementing effective security protocols to protect user data will be one of my top priority areas. And remember that cheap domain and hosting offers I mentioned? So you won't only be getting exceptional work but also reliable post-service support. In a nutshell, by choosing me you'll have not just a developer but an whole IT Service ready to provide quality work at an effective cost. Also our services are focused on turning 'IDEAS INTO REALTY' so join me to execute your vision!

@ASSAMWEB

Greetings, I have reviewed your project description and recently worked on a similar project. I believe I can help you deliver this successfully. Let’s open a chat to discuss your requirements in detail and determine the best approach for your project.

@Tarang78

Hi! I’m Tarang. I have read your entire project requirements. I will provide you with a HRMS WebApp Development within your budget. I have more than 12 years of experience and have completed 150+ projects in design and development. I am very interested in this job opportunity. I am available to start immediately and can deliver high-quality work within your timeline. Please join the chat so we can discuss further and get started right away.

@technoJaipur

Hello there, I have experience in ASP.NET WebForms, SQL Server, HRMS applications, secure authentication, employee management, payroll, and leave management. I can develop a robust and responsive HRMS application with a user-friendly interface and secure database architecture. I can handle employee management, payroll, leave management, secure registration/login, CMS, dynamic forms, role-based access, and data security. I will also ensure proper validation, performance, and responsive design across devices. 1 - Do you already have the HRMS workflow and database structure defined? 2 - Do you have any existing ASP.NET application that needs to be upgraded or developed from scratch? I can start immediately and deliver a secure, efficient, and easy-to-manage HRMS solution. Best Regards, Vipin Kumar