Sr .Net Developer Full Stack Developer

SmartIMS Inc.; Wilmington (DE); On-site; USD 120,000 - 180,000; Full time

Job summary

SmartIMS Inc. is seeking a Senior .Net Full Stack Developer to join our Wilmington, DE team.

This long-term role requires deep expertise in C#, .NET Framework/Core, ASP.NET Core, and front-end technologies to deliver enterprise-scale applications. You will design and implement REST APIs, work with SQL Server and Snowflake data platforms, and contribute to microservices, DI, and cloud-based deployments using Azure or AWS.

Qualifications

• 10+ years experience in software development.
• Strong hands-on experience with C#, .NET Framework, .NET Core, and ASP.NET Core.
• Expertise in OOP, SOLID, and design patterns.
• Experience building REST APIs, web services, and enterprise apps.
• Knowledge of EF/EF Core and LINQ.
• Understanding of microservices and DI.

Responsibilities

• Develop and maintain full-stack .NET applications.
• Design robust REST services and integrate with frontend apps.
• Apply SOLID principles and patterns for scalable solutions.
• Collaborate in a microservices architecture and CI/CD workflows.
• Work with SQL Server and Snowflake for data operations.

Skills

C#

NET Framework

NET Core

ASP.NET Core

Object-oriented programming

SOLID principles

Design patterns

REST APIs

Web services

Entity Framework / EF Core

LINQ

Microservices

Dependency Injection

HTML5

CSS3

JavaScript

TypeScript

Angular

React

Responsive UI

REST API frontend integration

State management

Form validation

Performance optimization

SQL Server

SQL queries / Joins / CTEs

Snowflake

Data loading & transformation

Snowpipe / Streams

Git / GitHub

Azure DevOps

CI/CD pipelines

Cloud familiarity (Azure or AWS)

Unit testing (xUnit/NUnit/MSTest)

Agile development

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, or related discipline

Tools

Git/GitHub

Azure DevOps

CI/CD pipelines

Cloud services (Azure or AWS)

Job description

Senior .Net Full Stack Developer

Location: Wilmington, DE

Duration: Long Term

Required skills:

• 10+ years experience.
• Strong hands‑on experience with C#, .NET Framework, .NET Core, and ASP.NET Core.
• Expertise in object-oriented programming, SOLID principles, and design patterns.
• Experience developing REST APIs, web services, and enterprise applications.
• Knowledge of Entity Framework or Entity Framework Core and LINQ.
• Understanding of microservices architecture and dependency injection.

• Strong knowledge of HTML5, CSS3, JavaScript, and TypeScript.
• Hands‑on experience with Angular or React.
• Experience developing responsive, reusable, and interactive user interfaces.
• Knowledge of front‑end integration with REST APIs.
• Familiarity with state management, form validation, and front‑end performance optimization.

• Strong experience with Microsoft SQL Server database development and administration fundamentals.
• Expertise in complex SQL queries, joins, subqueries, CTEs, views, functions, and stored procedures.
• Experience with database design, indexing, execution plans, and query performance tuning.
• Knowledge of transactions, normalization, and database optimization.

• Hands‑on experience with Snowflake data warehousing and SQL.
• Understanding of Snowflake architecture, databases, schemas, tables, and virtual warehouses.
• Experience with data loading, data transformation, and query performance optimization.
• Knowledge of Snowflake stages, file formats, Snowpipe, streams, and tasks.
• Experience integrating application data with Snowflake.

• Experience with Git, GitHub, Azure DevOps, or similar version control tools.
• Knowledge of CI/CD pipelines and automated deployment processes.
• Familiarity with Microsoft Azure or AWS cloud services.
• Experience with unit testing frameworks such as xUnit, NUnit, or MSTest.
• Knowledge of Agile development methodologies.

Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related discipline, or equivalent practical experience.

Preferred Qualifications

• Experience with Azure Data Factory, SSIS, ETL/ELT processes, or other data integration tools.
• Familiarity with Power BI or other reporting and analytics platforms.
• Experience with Docker, Kubernetes, and cloud-native application development.
• Understanding of secure coding practices and application performance monitoring.
• Experience working on large-scale enterprise applications and data-intensive systems.