
Käynnissä
Julkaistu
Maksettu toimituksen yhteydessä
We are looking for a senior Microsoft-stack developer to build Phase 1 of a confidential internal web application proof of concept for an industrial operations environment. This is not a brochure website or CMS job. It is a new coded PoC, intended to prove the architecture for extending an existing thick-client operational system into a web/PWA route. The existing live production system is already in use; this Phase 1 PoC will run separately against local/test data only and must not assume live-system integration at this stage. I expects a working Visual Studio solution, not just paperwork or architecture notes. Target stack / environment • C# • .NET 10 • ASP.NET Core • Blazor • [login to view URL] • SQL Server 2025 • Visual Studio 2026 • PWA / service worker behaviour Phase 1 scope Build a working proof of concept that includes: • Stub WinForms startup host • Basic shared-memory / startup flow structure • Redundancy Broker Server stub • Redundancy Broker Client stub • API application host / service skeleton • [login to view URL] interaction with local/test SQL Server only • Login/auth scaffold • Local approval flow via IsWebUser • Support for a JIT-pending auth state that shows a “Please wait for Authorisation” screen with timed recheck • Blazor front end • PWA/service worker shell • Up to 3 agreed demo screens/pages • Reusable UI mechanics sufficient to demonstrate: o fixed-layout operational UI o list/grid rendering o panel/container behaviour o basic popup/tooltip behaviour o filter state persistence o demonstration-only drag/drop path • Source-code handover plus brief setup notes Explicitly out of scope for Phase 1 • Live production system/database integration • Full replication of the existing desktop/MDI application • Full redundancy/duty logic • Production hardening for 24/7 deployment • Customer/vessel restricted workflows • Kiosk-phone mechanics • Raw hardware/device-ID capture • Broad second-phase productisation Required skill set We need someone strong in: • Senior C# / .NET engineering • Blazor and ASP.NET Core • [login to view URL] and SQL Server • Desktop-style/fixed-layout web UI design • Auth-flow implementation and state handling • PWA / service worker behaviour • Clean architecture for PoC-to-product evolution • Working under NDA / IP assignment / confidential client environments Strong advantage if you also have • WinForms experience • Shared memory / IPC familiarity • Windows/domain auth experience • SignalR or real-time internal application experience • Industrial, control-room, or internal operations dashboard experience What we want in your application Please include: 1. A short note on the closest similar project you have built 2. Your direct experience with Blazor + ASP.NET Core + SQL Server 3. Whether you can personally own the technical build 4. Your availability to start 5. Any relevant GitHub, code sample, or architecture example you are cleared to share Engagement note This is a specialist build, not a generic web task. We are looking for a developer who can produce a clean, working Phase 1 PoC that is structurally sound enough to support later phases if approved.
Projektin tunnus (ID): 40347897
159 ehdotukset
Etäprojekti
Aktiivinen 3 päivää sitten
Aseta budjettisi ja aikataulu
Saa maksu työstäsi
Kuvaile ehdotustasi
Rekisteröinti ja töihin tarjoaminen on ilmaista

With over a decade of experience in software development, I'm the professional you need for this confidential industrial web app project. The closest similar project I built was a proof of concept upgrade for a thick-client hospital management system into a modern, web-based application, where data security and strict patient confidentiality were key factors, much like the demands of your project. I have strong skills in C#, .NET, ASP.NET Core, Blazor, and SQL Server – precisely what your job requires. What sets me apart is my ability to see beyond building just a proof of concept. As someone who values practical innovation, I believe in building scalable and efficient systems with an eye on future growth. That aligns seamlessly with your need for clean architecture for PoC-to-product evolution. Moreover, my prior experience with PWA and service worker behaviour perfectly complements your target stack. In addition to technical skills, my clients appreciate my client-centered approach – understanding their business goals front and center. I view myself as not just a developer but as a long-term technology partner. If given the opportunity, I will take ownership of the technical build from the get-go, ensuring a reliable and scalable foundation for potentially later phases of your project as well. My calendar is available to start immediately!
$750 USD 2 päivässä
4,0
4,0
159 freelancerit tarjoavat keskimäärin $1 128 USD tätä projektia

Hello, At Live Experts, we are more than qualified to take on this project. With our extensive C# and .NET background, we have successfully managed complex architectural projects, delivering robust solutions that fulfill client objectives. Our ability to develop using Blazor, ASP.NET Core, and SQL Server aligns perfectly with the skill set needed for this project. In our closest similar project, we developed a complex web application for a manufacturing operation that also involved transforming an existing system to a web environment. Thus, we are familiar with protecting confidential information while creating exceptional working solutions. Our proficiency in desktop-style web UI design and clean architecture will ensure the proof of concept is aesthetically appealing and structurally sound. Moreover, we can personally own the technical build from beginning to end, matching your expectations for this critical project. We are available immediately and provide concrete communication throughout the process. While adhering strictly to NDA protocols, we can share relevant GitHub and code samples that showcase our capabilities in line with your project requirements. Let's work together in achieving a remarkable Phase 1 PoC and prove why you made the right choice Thanks!
$1 500 USD 3 päivässä
8,2
8,2

Hello, We have carefully reviewed the project details for the Senior .NET / Blazor Developer role to create a Phase 1 PoC for an industrial web application. Your need for a robust, architecturally sound PoC aligns perfectly with our capabilities. We recently developed a similar PoC for a control-room dashboard, transitioning it from a thick-client to a PWA, ensuring seamless integration with local/test environments. This experience will be invaluable in addressing your project's unique demands. Our expertise in C#, .NET, Blazor, and ASP.NET Core is complemented by a solid track record of building secure, scalable applications. We excel in clean architecture, PWA behavior, and effective state management—all crucial for your project. With over 8 years of experience and a history of successful projects, we are confident in delivering a robust PoC tailored to your specifications. We invite you to message us with more details. We will provide a detailed, tailored proposal within 24 hours, ensuring we exceed your expectations. Best regards, Puru Gupta Top 1% on Freelancer.com | 200+ Clients | AI-First Product Development Specialist
$1 500 USD 7 päivässä
7,6
7,6

I have extensive experience in building similar projects and working with Blazor, ASP.NET Core, and SQL Server. I can personally own the technical build, start immediately, and deliver high-quality results. You can check my GitHub for relevant code samples. I understand the project requirements and I am confident in my ability to deliver a structurally sound Phase 1 PoC. Let's discuss further to ensure alignment and adjust the budget accordingly. Your satisfaction is my priority, and I am eager to start working on this project.
$750 USD 12 päivässä
7,4
7,4

Hi, I am a software engineer. I have worked on complex .NET projects. I have the experience to work on your project.
$750 USD 7 päivässä
6,3
6,3

Hey, I am ready when you are.✅ I’ve worked on something very similar. Building a proof of concept for industrial web apps often faces challenges with integrating existing systems. What really matters here is demonstrating a clean architecture for future phases. I recently developed a similar PoC for a logistics system, showcasing seamless data interactions. While I haven't worked on this exact case, my experience with Blazor, ASP.NET Core, and SQL Server aligns well. I'd approach this by focusing on clean code and robust structure to support future expansion. Let's chat! -Oleksandr
$1 400 USD 7 päivässä
4,4
4,4

I understand that you're seeking a senior developer to create a robust proof of concept (PoC) for an industrial web application, emphasizing the need for a clean architecture that facilitates future enhancements. With over 12 years of experience in .NET and Blazor development, I have successfully built similar PoCs that align with your project scope. My expertise encompasses C#, ASP.NET Core, and SQL Server—skills critical for the construction of your application’s backend. Additionally, I've implemented secure authentication flows and PWA functionalities in past projects, ensuring a seamless user experience. I can personally own the technical build from start to finish, delivering a working Visual Studio solution complete with source code and setup notes. I’m also familiar with WinForms and shared memory concepts, which could benefit this project. Could you clarify what specific demo screens or functionalities you envision for Phase 1? This will help me tailor my approach effectively.
$1 500 USD 7 päivässä
4,3
4,3

Hello, I’m a senior .NET developer with strong experience in C#, ASP.NET Core, Blazor, and SQL Server, and I’ve built internal PoC systems that bridge desktop-style workflows into web/PWA architectures. I recently worked on a Blazor-based operations dashboard that replicated fixed-layout desktop UI patterns (grids, panels, state persistence) with ADO.NET-backed data access and custom auth flows, designed specifically to evolve into a production system. I can fully own the technical build, including structuring the solution (API host, client, service layers), implementing the auth/JIT state flow, and delivering a clean, extensible architecture aligned with your Phase 1 goals. I’m also comfortable working under NDA and building PoCs that are production-ready in structure without overengineering. Quick questions: should the redundancy broker stubs simulate messaging (e.g., SignalR or IPC-style), and do you have a preferred pattern for the shared-memory/startup flow? Also, will authentication be purely local for Phase 1 or aligned with future domain integration? I’m available to start immediately Best regards
$1 125 USD 7 päivässä
4,2
4,2

https://www.freelancer.com/projects/dot-net-core/Formulario-Blazor-con-Roles/reviews Hi, As a detail-oriented and skilled .NET developer with extensive experience in C#, ASP.NET Core, and SQL Server, I possess all the technical abilities your project requires. A notable similarity to your task is successfully developing a Blazor project for a client, specifically providing role-based access control within that implementation (https://www.freelancer.com/projects/dot-net-core/Formulario-Blazor-con-Roles/reviews). This has honed my understanding of Blazor + ASP.NET Core + SQL Server. Taking pride in my work, I can personally guarantee your satisfaction - I'll solely handle the technical building process from start to finish giving you the assurance of excellent service delivery. Having specialized in creating scalable web applications, I understand the crucial nature of structurally sound proof of concepts like Phase 1. My solid background in PWA and service worker behavior will ensure that we hit the ground running, on time! Let's collaborate to drive your project towards a highly feasible future.
$800 USD 10 päivässä
4,3
4,3

Hi, There is strong interest in the project and full support can be provided to ensure its successful progress. I fully understand your goals and the direction of this project. My focus will be on accuracy, quality, and efficiency throughout the process. I am committed to delivering an outcome that meets and exceeds your expectations. I am a Senior Software Engineer with over five years of experience in .NET, Desktop Application, Software Architecture, Web Application. I’ve successfully delivered projects that required aligning technical solutions with specific role and skill requirements. My background allows me to combine strong engineering expertise with precise skill evaluation. Before moving forward, I’d appreciate the opportunity to clarify a few details. Please send me a message in the chat so we can discuss everything properly. Looking forward, Dax Manning
$750 USD 7 päivässä
3,8
3,8

Hi, I am an IIT Grad, PMP Certified Professional, ex-BFSI and worked at fortune 500 companies. I will make it a reality for you. As a Senior NET Blazor Developer, I will build a scalable and secure web application architecture using .NET 6 Blazor Server, Entity Framework Core, and Azure SQL Database to extend an existing thick-client operational system into a web/PWA route. Kindly click on the chat button so we can discuss and get started. Will share you my prior projects done and my resume too. I have been doing freelancing since 2019 worked at top MNCs in both USA and India. Lets connect
$750 USD 7 päivässä
3,9
3,9

Hi, This aligns closely with my experience building **.NET-based operational systems and PoCs bridging desktop and web architectures**. I can deliver a clean, extensible Phase 1 foundation using your exact Microsoft stack. **Relevant experience:** I’ve built C#/.NET systems involving **WinForms + web hybrid flows, Blazor dashboards, and SQL Server-backed APIs**, including auth-state handling, polling flows, and fixed-layout operational UIs. **Approach:** * Structured Visual Studio solution with clear separation (UI / API / broker stubs) * Blazor front end with fixed-layout components, grid/list rendering, and state persistence * ADO.NET-based data layer (no ORM) for test DB * Auth scaffold with JIT “pending approval” state + timed recheck * PWA shell with service worker for offline-ready structure * Stubbed Redundancy Broker (client/server) with clean interfaces for future expansion **Ownership:** I will personally handle the full build (no outsourcing). **Availability:** Can start within 48 hours. **Timeline:** 3–5 weeks **Budget:** $1,000 – $1,500 Happy to share relevant code samples privately (NDA-safe). Best regards, Khrystyna
$750 USD 30 päivässä
3,4
3,4

Hi there, I’m Kristopher Kramer from McKinney, Texas. I’ve worked on similar projects before, and with over 15 years of experience as a senior full-stack and AI engineer, I have the expertise to deliver this properly. I’m available to start right away and would be happy to discuss the details whenever it’s convenient for you. I look forward to speaking with you. Best regards, Kristopher Kramer
$750 USD 7 päivässä
4,4
4,4

Hi, I am senior web app developer with 7 years of experience in Software Architecture, C# Programming, Blazor, .NET, Web Application, Visual Studio, API Development, Desktop Application, .NET Core and ADO.NET. I 've checked your project detail and understood what you want. I can also support both app design and development. I would like to have a brief chat or meeting with you very soon to finalize our project plan. Thank you Kashif.
$750 USD 23 päivässä
1,2
1,2

Hi, Should Phase 1 first prove the main PoC flow clearly - login/auth state, local SQL test data, Blazor UI, and PWA shell? Recently, I worked on internal web systems with auth flow, database-driven UI, and structured backend/frontend architecture designed to grow later. I used C#, ASP.NET Core, SQL-based data access, and dashboard-style UI logic to build clean, maintainable systems. I can personally own the technical build and deliver a working Phase 1 PoC. For this project, I will first build the core PoC structure - auth scaffold, local SQL connection, Blazor/PWA shell, and demo screens with reusable UI behavior. I can start quickly and I’m comfortable with NDA/confidential work. HOpe to discuss more on chat Best Artem
$900 USD 7 päivässä
1,2
1,2

Hello, I understand the importance of developing a secure and functional proof of concept for your industrial operations environment, ensuring it lays a solid foundation for future phases. My approach will leverage C#, .NET 10, ASP.NET Core, and Blazor to create a robust and user-friendly application that meets your specifications. Here is what I will deliver: - A working proof of concept with a stub WinForms startup host and basic shared-memory structure. - A Blazor front end that includes up to 3 agreed demo screens/pages to showcase the intended functionality. - Clean code and clear communication throughout the process, ensuring easy handover with setup notes. I can confidently complete this within your budget and timeline, and I will keep you updated throughout the process. Could you clarify the specific requirements for the local approval flow via IsWebUser? Best regards
$1 125 USD 7 päivässä
0,0
0,0

I saw your project and am confident I can deliver on this. I'm currently working on a similar project and understand the importance of building a Phase 1 proof of concept for an industrial web application. By ensuring a robust architecture with Blazor, ASP.NET Core, and SQL Server, I guarantee a working Visual Studio solution that meets your requirements. This PoC will showcase the potential for extending your existing thick-client operational system into a web/PWA route, providing the foundation for future development phases. I invite you to view my portfolio, which showcases the quality and results of my past work. I look forward to hearing from you. Regards, Travis
$800 USD 7 päivässä
0,0
0,0

The key challenge here's building a clean, architecturally sound PoC that can evolve into production, not just a throwaway prototype. I've built 14 WinUI 3/. NET desktop apps and multiple ASP. Core + SQL Server backends over the last 2 years - so the stack is native to me. Still I understand the scope: stub WinForms host, Blazor frontend with PWA shell, ADO. NET against local SQL Server, auth scaffolding with JIT-pending state. 3 demo screens showing fixed-layout UI patterns, grids, panels, and basic drag-drop. Out of scope is production hardening and live-system integration, which keeps Phase 1 focused and deliverable. I can personally own the technical build end-to-end. Sometimes i'm available to start immediately and will deliver a working Visual Studio solution with clean separation of concerns. ready for your team to extend in Phase 2. I'm looking to build strong reviews on this platform and will deliver quality and fast work so. Happy to share relevant architecture examples and code samples under NDA.
$1 200 USD 10 päivässä
0,0
0,0

Hi, I am a senior .NET developer with over 7 years of experience. I have worked on projects for companies both large and small. I have developed various types of applications using C#, C++ and JavaScript: web, mobile, desktop, cloud, and games. I write high-quality and easily maintainable code. Please contact me via private chat. Thanks so much.
$1 000 USD 15 päivässä
0,0
0,0

I am a dedicated and results-driven ASP.NET C# Developer with over 8+ years of professional experience in designing, developing, and maintaining scalable web applications and enterprise-level software solutions using Microsoft technologies. I specialize in building secure, high-performance, and user-friendly systems that align closely with business requirements.
$800 USD 25 päivässä
0,0
0,0

Choosing me for your Microsoft-stack PoC project means choosing a developer who is experienced across the full range of intersecting technologies and skills necessary for this build. Whether it's developing the Blazor front-end with fixed-layout operational UI or designing efficient ADO.NET-based data access with SQL Server for controlled test environments, I have the skills to structure and deliver a robust proof of concept. Additionally, my experience with ASP.NET Core architecture and PWA/service worker implementation will be highly valuable in building the required authentication flows, JIT pending states, and reusable UI mechanics for your internal application. Furthermore, I bring effective project management and version control skills to the table. This ensures smooth coordination of all components such as the API host, redundancy stubs, and WinForms startup integration, while keeping the solution clean and extensible for future phases. With my proficiency demonstrated across similar enterprise-grade systems, I can assure you that your budget will be used efficiently to deliver a solid and scalable Phase 1 PoC. Thanks, Joseph
$1 500 USD 20 päivässä
0,0
0,0

London, United Kingdom
Maksutapa vahvistettu
Liittynyt toukok. 1, 2024
$30-250 USD
$30-250 USD
$750-1500 USD
£20-250 GBP
₹1500-12500 INR
$30-250 CAD
₹12500-37500 INR
$100 AUD
$2-8 USD/ tunnissa
$750-1500 AUD
$250-750 USD
$10-30 USD
€30-250 EUR
₹600-1500 INR
€12-18 EUR/ tunnissa
$250-750 USD
$250-750 USD
₹1500-12500 INR
£10-20 GBP
$30-250 USD
₹37500-75000 INR
₹600-1500 INR
$15-25 CAD/ tunnissa
$250-750 USD