Full Stack Developer

Full Stack Developer

Location: Vienna, VA (Hybrid - 3 days onsite/week)

Duration: Contract

Pay: $70–75/hr (Vienna, VA) | $64–70/hr (Pensacola, FL)

Position Summary

Seeking a senior Full Stack Developer with extensive experience designing, developing, modernizing, and supporting enterprise applications. The ideal candidate will have expertise across the Microsoft technology stack, modern frontend frameworks, cloud platforms, databases, and API integrations while working throughout the SDLC. This role involves modernizing legacy applications, developing custom solutions, collaborating with business stakeholders, and supporting production environments.

Required Technical Skills

Backend

C#

.NET Framework / .NET Core

ASP.NET

REST APIs

Microservices

Frontend

React.js

JavaScript

TypeScript (preferred)

HTML5

CSS3

Database

SQL Server

SQL

MongoDB

Cloud & Integration

Microsoft Azure

Azure Cloud Services

Azure DevOps

MuleSoft

REST APIs

Development Tools

Git

CI/CD

Visual Studio

Azure DevOps Pipelines

Core Experience

End-to-end Full Stack Development

Enterprise Application Development

Legacy Application Modernization

SDLC

Production Support

UAT

Application Deployment

System Integration

Performance Optimization

Root Cause Analysis

Business Requirements Analysis

Technical Documentation

Agile/Scrum

Responsibilities

Design, develop, test, and deploy enterprise full-stack applications.

Build scalable web applications using C#, .NET, React, JavaScript, SQL Server, MongoDB, Azure, and MuleSoft.

Modernize legacy applications into modern architectures.

Translate business requirements into technical solutions.

Develop APIs and integrations with enterprise systems.

Support application deployments across development, testing, and production environments.

Participate in UAT, release management, and production support.

Perform root cause analysis and troubleshoot production issues.

Create technical documentation throughout the SDLC.

Collaborate with business users, architects, QA, and project teams.

Required Qualifications

10+ years of Full Stack Development experience.

Strong expertise in C#, .NET, React, JavaScript.

Experience with SQL Server and MongoDB.

Azure Cloud development experience.

Experience integrating applications using MuleSoft or REST APIs.

Experience modernizing legacy applications.

Strong SDLC knowledge.

Experience supporting enterprise production applications.

Excellent analytical, communication, and problem-solving skills.

Bachelor's degree in Computer Science, Information Technology, or related field.

Preferred Qualifications

Experience with Navy Federal systems.

Experience with Project Portfolio Management (PPM).

Master's degree.

Financial services experience.

About Seneca Resources

At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact.

When you work with Seneca, you’re choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide. We take the time to understand your goals and match you with roles that align with your skills and career path. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team who will advocate for you every step of the way.

Seneca Resources is proud to be an Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.

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