You will get ASP.NET Core Web App Audit & Fix Plan (C# + Azure + SQL Performance)
Top Rated
Project details
This project delivers an ASP.NET Core web app audit + fix plan (and optionally a first sprint of fixes) for apps using C#, SQL Server, and Azure. I review the hot paths (slow endpoints/queries), error patterns, deployment pipeline, and architecture risks, then produce a short, actionable roadmap. If you choose the implementation tier, I’ll ship fixes as PRs with clear notes and targeted tests where they pay off. My process follows platform best practices for ASP.NET Core (async, performance, reliability) and production logging/monitoring so you can measure improvements and reduce repeat incidents.
Programming Languages
ASP.NET, TypeScript, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$350
|
Standard
$1,500
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 1 | 2 |
Number of Pages | 0 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$120
Additional Page
(+ 2 Days)
+$250
Responsive Design
(+ 2 Days)
+$300
Azure DevOps CI/CD pipeline setup
(+ 4 Days)
+$600Frequently asked questions
25 reviews
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RC
Reuel C.
Jun 20, 2026
Subscriptio Plugin Specialist
Damir is a star. This is the third or fourth time we've used Damir to fix issues for a WooCommerce plugin that is no longer supported. Once again, he tracked down the problem and got it resolved quickly. He's become our go-to guy for the more complex issues. Always reliable, easy to work with, and gets the job done.
EA
Emin A.
May 18, 2026
Full-stack .NET Core + React Developer Needed for Azure SaaS with OpenAI Features
Working with Damir on our Web Application was a genuinely smooth experience. He handled everything from C# and .NET Framework to ASP.NET Core and ASP.NET MVC with a high level of confidence, especially when it came to API Development and API Integration. What I appreciated most was how clearly he communicated decisions around ASP.NET Web API structure and Microsoft Azure setup. He’s a clear communicator who doesn’t overcomplicate things, and at the same time he’s very detail oriented when it comes to SQL queries, performance, and overall system stability. He was fully accountable for outcomes, not just tasks. If something needed improvement, he would proactively suggest better solutions rather than just implement what was asked. That solution oriented mindset made a big difference for our web development process. On the frontend side, he was comfortable working with JavaScript and React, making sure everything connected cleanly with the ASP.NET Core backend. We also had some light OpenAI API integration, and he handled it in a practical, no-nonsense way. Overall, he’s professional, reliable, and easy to collaborate with. He’s clearly committed to quality and brings consistency to every part of the project. I’d definitely work with him again on any C#/.NET or web application work.
EG
Evgeny G.
May 8, 2026
VB6 to C# Migration and Code Refactoring
Damir joined our VB6 to C# migration when things were already getting messy. The system had old .NET Framework modules, ASP.NET MVC pages, custom ASP.NET Web API endpoints, direct SQL queries in Microsoft SQL Server, and even some newer React and Angular pieces added over time. He cleaned up several unstable API Integration flows early on, moved core logic into a more maintainable ASP.NET Core / .NET Core structure, and improved some SQL and PostgreSQL queries enough that a few heavy reports started running around 40% faster.
What I appreciated most was that Damir was very solution oriented and didn’t just blindly rewrite things. A few times we suggested approaches that basically recreated the same old VB6 problems in C#, and he pushed back with simpler solutions that made more sense long term. He was also a clear communicator during requirement changes and rollout discussions, especially when we were trying to balance deadlines with stability.
Not everything went perfectly on the first pass, but he stayed on top of issues until they were resolved properly. That mattered a lot because some of the old business logic was inconsistent depending on customer environment and user role. Damir was detail oriented in the areas that actually needed attention, particularly around reporting edge cases and older API Integration behavior that had caused production issues before.
He worked closely with our internal team during rollout and was collaborative when priorities shifted midway through the migration. We ended up with a much cleaner ASP.NET Core application, more stable deployments through Azure DevOps and CI/CD, and a Web Application our developers are actually comfortable maintaining now. From my side, he was reliable, professional, and accountable for outcomes instead of just completing tickets and disappearing.
What I appreciated most was that Damir was very solution oriented and didn’t just blindly rewrite things. A few times we suggested approaches that basically recreated the same old VB6 problems in C#, and he pushed back with simpler solutions that made more sense long term. He was also a clear communicator during requirement changes and rollout discussions, especially when we were trying to balance deadlines with stability.
Not everything went perfectly on the first pass, but he stayed on top of issues until they were resolved properly. That mattered a lot because some of the old business logic was inconsistent depending on customer environment and user role. Damir was detail oriented in the areas that actually needed attention, particularly around reporting edge cases and older API Integration behavior that had caused production issues before.
He worked closely with our internal team during rollout and was collaborative when priorities shifted midway through the migration. We ended up with a much cleaner ASP.NET Core application, more stable deployments through Azure DevOps and CI/CD, and a Web Application our developers are actually comfortable maintaining now. From my side, he was reliable, professional, and accountable for outcomes instead of just completing tickets and disappearing.
DM
Daryl M.
May 1, 2026
OW API - SPS Commerce Integration
Damir helped us with an OW API integration project connected to SPS Commerce, and the experience was noticeably smooth compared to similar integrations we’ve done before.
This wasn’t just a basic API hookup — there were multiple moving parts around data synchronization, transformation, and reliability. He worked through it using C#, .NET, and ASP.NET Core, building out clean API endpoints and handling API Integration in a way that felt structured and predictable. The way he organized the Web API layer made it much easier for our team to understand what’s happening under the hood.
One thing that stood out was how he approached edge cases. Instead of patching issues later, he anticipated them early — especially around data consistency, retries, and error handling between systems. That level of attention made the integration far more stable than we initially expected.
Communication was steady and to the point. He didn’t overload us with unnecessary detail, but when something mattered, he explained it clearly and backed it up with practical suggestions. He worked in a very Professional and Reliable way, stayed accountable for outcomes, and was easy to collaborate with throughout the process.
Overall, this felt like working with someone who not only understands C#/.NET and API Development, but also how integrations should behave in real production environments. We’d definitely bring him back for future API Integration or Web Development work.
This wasn’t just a basic API hookup — there were multiple moving parts around data synchronization, transformation, and reliability. He worked through it using C#, .NET, and ASP.NET Core, building out clean API endpoints and handling API Integration in a way that felt structured and predictable. The way he organized the Web API layer made it much easier for our team to understand what’s happening under the hood.
One thing that stood out was how he approached edge cases. Instead of patching issues later, he anticipated them early — especially around data consistency, retries, and error handling between systems. That level of attention made the integration far more stable than we initially expected.
Communication was steady and to the point. He didn’t overload us with unnecessary detail, but when something mattered, he explained it clearly and backed it up with practical suggestions. He worked in a very Professional and Reliable way, stayed accountable for outcomes, and was easy to collaborate with throughout the process.
Overall, this felt like working with someone who not only understands C#/.NET and API Development, but also how integrations should behave in real production environments. We’d definitely bring him back for future API Integration or Web Development work.
AB
Anton B.
Jan 6, 2026
Support existing website with Umbraco CMS
Working with this team was a great experience. They demonstrated strong expertise with Umbraco CMS, a solid understanding of web architecture, and a very thoughtful approach to implementation.
What stood out most was their ability to quickly understand an existing codebase, make well-reasoned technical decisions, and deliver clean, maintainable solutions. They consistently proposed improvements rather than just executing tasks, which added real value to the project.
Communication was clear and professional, deadlines were respected, and the overall quality of work was excellent. I would confidently recommend them to anyone looking for experienced developers or a reliable technical partner for complex web projects.
What stood out most was their ability to quickly understand an existing codebase, make well-reasoned technical decisions, and deliver clean, maintainable solutions. They consistently proposed improvements rather than just executing tasks, which added real value to the project.
Communication was clear and professional, deadlines were respected, and the overall quality of work was excellent. I would confidently recommend them to anyone looking for experienced developers or a reliable technical partner for complex web projects.
About Damir
Microsoft Partner | Azure OpenAI WPF Graph .NET C# | AI Integration
100%
Job Success
Barcelona, Spain - 3:43 pm local time
Senior Full-Stack Developer with 10+ years of experience delivering 50+ enterprise-level Web Development and Web Application systems using C#, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5, CSS, API, API Development, RESTful API, API Integration, Microsoft SQL Server, PostgreSQL, SQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, Node.js, PHP and Python. I build scalable Web Application platforms with clean API Integration, optimized SQL, and production deployments on Microsoft Azure using C#, .NET Core, ASP.NET Core, React, Angular and JavaScript. I also develop AI powered systems using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing. If you need a developer who can build scalable production-ready systems fast let’s talk.
I have built 100+ API Integration and API Development solutions using C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC and RESTful API architecture, integrating systems across Microsoft Azure, Azure DevOps, CI/CD pipelines and Amazon Web Service. I have implemented 70+ automation workflows using API Integration, Node.js, Python, FastAPI and SQL-based processing across Microsoft SQL Server and PostgreSQL environments.
I have delivered 50+ Web Application systems including SaaS platforms, internal tools, dashboards and integration-heavy solutions using C#, ASP.NET Core, .NET Core, JavaScript, React, Angular, AngularJS, TypeScript, SQL, Microsoft SQL Server, PostgreSQL and API Integration deployed on Microsoft Azure and Amazon Web Service. My focus is combining backend architecture with modern Web Development and Web Design for scalable systems.
⚡ What I Build
🔹 Web Application systems processing 100k+ API requests daily using C#, ASP.NET Core, RESTful API, API Development, Microsoft SQL Server, PostgreSQL and SQL optimization
🔹 Integration-heavy platforms using C#, .NET Framework, ASP.NET MVC, ASP.NET Core, API Integration, RESTful API and Node.js connected to CRMs, SaaS tools and external APIs
🔹 Cloud-based systems deployed on Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service with scalable backend architecture
🔹 Frontend interfaces using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS with responsive Web Design
🔹 AI powered features using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing integrated into existing Web Application platforms
⚡ What Makes Me Different
Most developers build features. I build scalable systems.
As a Senior Full Stack Developer, I focus on:
🔹 API Development and RESTful API architecture using C#, .NET Core, ASP.NET Core and ASP.NET MVC
🔹 Complex API Integration across enterprise systems using Microsoft Azure and Azure DevOps
🔹 High-performance Microsoft SQL Server, PostgreSQL and SQL optimization
🔹 Cloud-native deployment using Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service
🔹 Full-stack Web Development using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS
🔹 AI powered automation, ai agent workflows and AI Integration using OpenAI API, OpenAI, Claude, Claude API, LangChain and FastAPI
I design systems where C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, SQL, React, Angular and Microsoft Azure work as a unified architecture. My focus is production-grade Web Application systems with clean API Integration, scalable infrastructure and maintainable backend architecture built with C#, .NET Framework, ASP.NET, ASP.NET Core and ASP.NET MVC.
⚡ Core Stack
C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, Node.js, PHP, Python, HTML, HTML5, CSS, SQL, Microsoft SQL Server, PostgreSQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, API, API Development, RESTful API, API Integration, Web Development, Web Application, Web Design, OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, ai agent, ai automation, ai powered systems, RAG, Artificial Intelligence, Machine Learning, Natural Language Processing.
I am currently available for Web Development, API Development, API Integration, AI Integration, ai automation and enterprise .NET development using C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, Microsoft Azure, React and Angular.
Steps for completing your project
After purchasing the project, send requirements so Damir can start the project.
Delivery time starts when Damir receives requirements from you.
Damir works on your project following the steps below.
Revisions may occur after the delivery date.
Audit & risk mapping
Review architecture, hot paths, deployment setup, and failure points. Identify the top issues and quick wins. Output: short action plan and priority list.
Fix top issues (bugs/performance/security)
Implement fixes in PRs: stabilize critical flows, optimize slow queries/endpoints, and address obvious security gaps. Add targeted tests where they pay off.