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ASP.NET Core Specialist

PROFESSIONAL
API DEVELOPMENT
SERVICES

Build scalable, secure, and high-performance APIs for modern applications — architected with clean code, deployed with confidence.

50+
APIs Built
99.9%
Uptime SLA
5+
Years .NET
devapi — POST /api/v1/auth/token
What I Build

CORE SERVICES

End-to-end backend development across the full API lifecycle — from architecture to deployment.

01
🔌

REST API Development

Design and implement production-grade RESTful APIs using ASP.NET Core — with versioning, rate limiting, pagination, error handling, and full OpenAPI/Swagger documentation baked in from day one.

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02
🔐

Authentication Systems

Implement robust security with JWT bearer tokens, refresh token rotation, OAuth 2.0, ASP.NET Core Identity, and role-based access control (RBAC). Security is architecture, not an afterthought.

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03
🗄️

Database Design

Architect normalized, performant relational schemas for Microsoft SQL Server. ERDs, migrations via EF Core, stored procedures, query optimization, and indexing strategies for real-world load.

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04

API Integration

Seamlessly integrate third-party services — payment gateways, cloud providers, SMS/email platforms, and external APIs — using resilient patterns like retry policies, circuit breakers, and typed HTTP clients.

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Tech Stack

TECHNOLOGIES

A battle-tested stack chosen for performance, scalability, and long-term maintainability.

ASP
ASP.NET Core
SQL
SQL Server
REST
REST APIs
JWT
JWT Auth
🐳
Docker
GIT
Git / GitHub
How I Work

DEVELOPMENT PROCESS

A structured, transparent workflow that delivers quality at every phase — no surprises, just results.

01
Phase 1

Requirement Analysis

Deep-dive into your business logic, data models, and performance expectations to define clear API contracts.

02
Phase 2

API Design

Design endpoints, schemas, and auth flows using OpenAPI spec. Full review before a single line is written.

03
Phase 3

Development

Clean architecture implementation — controllers, services, repositories, and middleware built for testability.

04
Phase 4

Testing

Unit tests, integration tests, and Postman collection delivery. Every endpoint verified against the spec.

05
Phase 5

Deployment

Docker containerization, CI/CD pipeline setup, and production deployment with monitoring and documentation.

Why Choose This Service

BUILT FOR PRODUCTION

Every API I deliver is engineered to handle real-world demands — not just demos. Here's what that means in practice.

📐
Scalable Architecture
Clean Architecture + CQRS patterns ensure your codebase grows gracefully with your product — not against it.
🛡️
Secure Authentication
JWT, refresh tokens, RBAC, and HTTPS enforced. Security audited before every delivery.
High Performance APIs
Async/await throughout, response caching, query optimization, and benchmarked before shipping.
Clean Code
SOLID principles, meaningful naming, full XML docs, and test coverage. Code your team will actually want to maintain.
AuthController.cs
 1/// <summary>Authenticate user</summary>
 2[HttpPost("token")]
 3[AllowAnonymous]
 4public async Task<IActionResult> Login(
 5    [FromBody] LoginRequest request)
 6{
 7    var user = await _userService
 8        .ValidateAsync(request);
 9
10    if (user is null)
11        return Unauthorized(new {
12            message: "Invalid credentials"
13        });
14
15    var token = _jwtService
16        .GenerateToken(user);
17    var refresh = await _jwtService
18        .CreateRefreshToken(user.Id);
19
20    return Ok(new AuthResponse
21    {
22        AccessToken  = token,
23        RefreshToken = refresh,
24        ExpiresIn    = 3600
25    });
26}
Start a Project

LET'S BUILD YOUR
BACKEND SYSTEM

Tell me about your project and I'll get back to you within 24 hours with a clear proposal.

Ready to ship
production-grade
APIs?

Whether you're starting from scratch or need to scale an existing backend, I'm here to help architect, build, and deliver — on time and to spec.

✓ Message received! I'll reply within 24 hours with a detailed proposal.