Senior .NET Full-Stack Engineer – Remote/Hybrid

CapTech; Philadelphia (Philadelphia County); Hybrid; USD 110,000 - 140,000; Full time

Benefits offered by this job

CapFlex – remote/hybrid flexibility

Learning & Development – certification

Modern Health

Carrot Fertility

Fringe – lifestyle benefits stipend

Employee Resource Groups

Philanthropic Partnerships

401(k) Matching

Health coverage

Disability insurance

Paid family leave

PTO

Job summary

CapTech is a U.S.-based consulting firm delivering enterprise-scale software projects. We design, develop and deliver high-quality systems, including API-driven architectures, microservices, cloud deployments, and front-end portals.

This role focuses on full-stack development with .NET, ASP.NET MVC, RESTful APIs, and modern front-end frameworks. You’ll collaborate with clients and engineers to create scalable solutions and mentor junior developers.

Qualifications

• 4+ years of experience in designing and developing applications using .Net Framework 4.7 to .Net Core 3.1.
• Proven web development experience with ASP.NET MVC, C#, and Entity Framework.
• RESTful API development using Web API and Swagger.
• Database development with SQL Server, Azure Cosmos, or MongoDB.
• Frontend development with JavaScript, CSS, and libraries like Angular, Bootstrap, Vue, or React.
• Experience with Visual Studio or Visual Studio Code.
• Experience with AI development tools including Claude, CodeX, OpenClaude and AI orchestration.
• Knowledge of source control (Git) and collaborative workflows.
• Familiarity with multi-system integrations, distributed systems, and enterprise integration challenges.
• Strong problem-solving, performance tuning, and scalable design skills.

Responsibilities

• Collaborate with team members and clients to deliver a technical solution that meets the unique needs of our clients.
• Create quality deliverables to communicate technical solutions to appropriate audiences.
• Leverage CapTech’s internal programs and self-directed training to continually develop industry-relevant knowledge and skills.
• Understand and implement object-oriented design patterns.
• Communicate effectively to team members with varying degrees of technical knowledge.
• Provide technical mentoring.

Skills

NET Framework/Core

ASP.NET MVC

C#

Entity Framework

RESTful API

Web API/Swagger

SQL Server

Azure Cosmos / MongoDB

JavaScript

CSS

Angular

Bootstrap

Vue

React

Visual Studio

Visual Studio Code

Claude / CodeX / OpenClaude

AI orchestration

Git

Distributed systems

System integrations

Performance tuning

Tools

Agentic AI development

AI toolset: Claude, CodeX, OpenClaude

Job description

CapTech is a U.S.-based consulting firm delivering enterprise-scale software projects. We design, develop and deliver high-quality systems, including API-driven architectures, microservices, cloud deployments, and front-end portals.

This role focuses on full-stack development with .NET, ASP.NET MVC, RESTful APIs, and modern front-end frameworks. You’ll collaborate with clients and engineers to create scalable solutions and mentor junior developers.