Senior AI .NET Developer – Blazor, Azure, Hybrid

Apexon; Mechanicsburg (Cumberland County); Hybrid; USD 130,000 - 170,000; Full time

Benefits offered by this job

Health Insurance

401K Plan

Life Insurance

Paid Vacations & Holidays

Skill Development

Job summary

Apexon in Mechanicsburg, PA, is seeking a Senior Developer (AI) with strong C#/.NET and hands-on AI tooling experience. The role is hybrid, onsite Tue/Thu, collaborating with product owners, architects, and security teams to build enterprise applications using Blazor and REST APIs.

You will validate AI-generated code, design scalable data models in Azure Cosmos DB, implement Okta-based authentication, and lead reviews as a senior contributor or technical lead. A Bachelor's degree is preferred.

Qualifications

• 8+ years of professional software development experience, including at least 5 years of senior‑level C#/.NET development.
• Proven ability to deliver independently as a senior contributor or technical lead.
• Microsoft Blazor Server and/or WebAssembly, including component design, state management, and performance optimization.
• REST API design and development using ASP.NET Core Web API, including versioning, error handling, and OpenAPI/Swagger.
• Azure Cosmos DB (NoSQL), including data modeling, partition keys, RU optimization, indexing, and change feed.
• Okta integration, including SSO, OIDC/OAuth 2.0, token handling, and role‑based or claim‑based authorization.
• Hands‑on experience using AI coding assistants and agents such as Claude, Cursor, or similar tools in production workflows.
• Strong code review skills, including identifying subtle bugs, security vulnerabilities, hallucinated APIs, and over‑engineered code.
• Knowledge of security best practices, including OWASP, secrets management, and input validation.

Responsibilities

• Review and validate AI‑generated code and other outputs from tools such as Claude and Cursor for correctness, security, performance, and maintainability.
• Determine whether AI‑generated outputs should be approved, refactored, discarded, or escalated for human or specialist review.
• Define and refine review criteria, guardrails, and quality checks for AI‑generated outputs.
• Design and optimize Azure Cosmos DB data models, partitioning strategies, and queries.
• Build and secure REST APIs, integrating authentication and authorization through Okta using OIDC/OAuth 2.0.
• Develop effective prompts and agent instructions, and provide feedback to improve AI output quality.
• Document technical decisions, reusable patterns, and review criteria to ensure knowledge transfer and continuity.
• Collaborate with product owners, architects, and security teams.
• Design, develop, and maintain application features using Blazor, .NET, and REST APIs.

Skills

C# / .NET

Blazor

ASP.NET Core

Azure Cosmos DB

Okta

AI tooling

Security practices

Code review

REST APIs

Education

Bachelor's degree

Tools

Claude API

Cursor

Azure DevOps

GitHub Actions

xUnit

Azure App Service

Job description

Apexon in Mechanicsburg, PA, is seeking a Senior Developer (AI) with strong C#/.NET and hands-on AI tooling experience. The role is hybrid, onsite Tue/Thu, collaborating with product owners, architects, and security teams to build enterprise applications using Blazor and REST APIs.

You will validate AI-generated code, design scalable data models in Azure Cosmos DB, implement Okta-based authentication, and lead reviews as a senior contributor or technical lead. A Bachelor's degree is preferred.