You will get your .Net Core or Java SpringBoot API issues debugged and fixed
Project details
Are you facing issues with your .NET Core Web API?
I can quickly debug, fix, and optimize your APIs to get them running smoothly. With years of experience in .NET Core, Web API, and backend systems, I provide fast, reliable fixes so you can focus on your product.
What you get with this service:
Quick debugging and error resolution
Code optimization for better performance
Detailed explanation of the fix
Optional advice for avoiding future issues
Why choose me:
Experienced in backend API development and performance tuning
Fast delivery for urgent issues
Clean, maintainable code solutions
I can quickly debug, fix, and optimize your APIs to get them running smoothly. With years of experience in .NET Core, Web API, and backend systems, I provide fast, reliable fixes so you can focus on your product.
What you get with this service:
Quick debugging and error resolution
Code optimization for better performance
Detailed explanation of the fix
Optional advice for avoiding future issues
Why choose me:
Experienced in backend API development and performance tuning
Fast delivery for urgent issues
Clean, maintainable code solutions
Programming Languages
ASP.NET, Java, C#Coding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$75
|
Standard
$150
|
Advanced
$300
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
About Ahsan
Senior .NET / Java Backend Engineer | FHIR, EMPI & API Architecture
Karachi, Pakistan - 2:21 am local time
I specialize in:
HL7-FHIR interoperability engines
EMPI systems with deterministic and probabilistic matching
REST API architecture & enterprise integrations
EHR governance, ONC alignment & compliance-driven backend design
Microservices, concurrency control & performance optimization
Azure-based cloud deployments & scalable infrastructure
Recent Highlights
Led end-to-end delivery of a complete backend platform including REST APIs, business logic layers, database architecture, and Azure cloud infrastructure
Architected a FHIR interoperability engine integrating with Azure FHIR Server
Built a production-grade EMPI engine resolving cross-system patient duplication
Implemented governance-aligned backend systems supporting ONC-aware workflows
Additional Experience
FinTech & Payments: Secure payment portals, transaction safety, session management, thread-safe backend systems
Backend Engineering: REST APIs, microservices, background services, distributed auth, concurrency control, and performance tuning
Data & Cloud:
SQL Server (T-SQL), PostgreSQL, Oracle, Entity Framework, Hibernate, AWS & Azure deployments, cloud-based integrations
Steps for completing your project
After purchasing the project, send requirements so Ahsan can start the project.
Delivery time starts when Ahsan receives requirements from you.
Ahsan works on your project following the steps below.
Revisions may occur after the delivery date.
Analyze & Reproduce Issue
I review your code, logs, and environment setup. Reproduce the bug/error to fully understand the problem.
Debug & Fix
Resolve the identified bug(s) or performance issues. Refactor code if using the Advanced package.