Senior .NET Developer

Sunshine Enterprise USA LLC; Columbia (SC); Hybrid; USD 120,000 - 150,000; Part time

Job summary

Sunshine Enterprise USA LLC in Columbia, SC seeks a Senior .NET Developer to design, build, and maintain enterprise‑class applications. The role focuses on .NET/C#, Oracle and SQL Server integrations, and collaborating with business users and vendors to deliver reliable software solutions.

The candidate will work in a hybrid setup with 3 days in the office and 2 remote, and must have 10+ years of experience in the field.

Qualifications

• 6+ years of experience developing enterprise applications with .NET and C#.
• 4+ years supporting complex enterprise-class applications.
• 4+ years integrating with Oracle and SQL Server databases.
• 4+ years using Microsoft development tools; State Government experience.
• Strong troubleshooting, debugging, and problem-solving skills.
• Excellent verbal and written communication skills.

Responsibilities

• Design, develop, enhance, and maintain enterprise‑level .NET applications.
• Develop and support mission‑critical business applications using C# and .NET.
• Build and maintain integrations with Oracle and SQL Server databases.
• Develop solutions within Microsoft's software development ecosystem.
• Analyze, troubleshoot, debug, and resolve complex issues.
• Perform unit testing, integration testing, and production support.
• Collaborate with stakeholders to gather requirements and validate them.
• Coordinate with vendors and internal teams on specs and test plans.
• Participate in code reviews and uphold best practices.
• Maintain documentation and provide project status updates.
• Support deployments, upgrades, and ongoing maintenance.

Skills

C#

NET

Troubleshooting

Communication

Debugging

State Government experience

Microsoft Tools

Enterprise Apps

Education

Bachelor's Degree in Computer Science/IT

Tools

Visual Studio 2022

Visual COBOL

Oracle

SQL Server

Microsoft development tools

System integrations

Job description

About Sunshine Enterprise USA LLC We strive to be the premier national business solution for our clients, associates and business partners.

Connecting Great Companies with Great People

Founded on the principle that the right person in the right role can change everything, SEU-USA is more than just a staffing agency. Consequently, we are a strategic partner dedicated to building the powerful workforces that drive business success across the USA.

Senior .NET Developer

Location: Columbia, SC Hybrid (3 days in office, 2 days remote).

Interview Process: 2 Rounds of Virtual Interviews
Duration: 12 Months
Employment Type: Contract
Experience Required: 10+ Years

Candidate location: Candidate must be a CURRENT SC, NC, or GA Resident AND be willing to relocate to SC at their own expense prior to their start date.

Project Scope:

Seeking an experienced Senior .NET Developer to develop, enhance, and support enterprise‑class mission‑critical business applications. The ideal candidate will have extensive experience with .NET, C#, Oracle, SQL Server, Microsoft development technologies, and enterprise system integrations. The role involves designing, developing, troubleshooting, and maintaining highly scalable applications while collaborating with business users, technical teams, and external vendors to deliver reliable software solutions.

Key Responsibilities:

• Design, develop, enhance, and maintain enterprise‑level .NET applications.
• Develop and support mission‑critical business applications using C# and .NET technologies.
• Build and maintain integrations with Oracle and SQL Server databases.
• Develop solutions using Microsoft's software development ecosystem.
• Analyze, troubleshoot, debug, and resolve complex application issues.
• Perform unit testing, integration testing, and production support.
• Collaborate with business stakeholders to gather and validate requirements.
• Work with external vendors and internal teams to develop specifications and test plans.
• Participate in code reviews and ensure adherence to development best practices.
• Maintain technical documentation and provide regular project status updates.
• Support software deployments, upgrades, and ongoing application maintenance.

Required Skills & Experience:

• 6+ years of experience developing enterprise applications using .NET and C#.
• 4+ years of experience supporting complex enterprise‑class mission‑critical applications.
• 4+ years of experience integrating applications with Oracle and SQL Server databases.
• 4+ years of experience using Microsoft software development tools and technologies.4+ years of State Government experience.
• Strong troubleshooting, debugging, and problem‑solving skills.
• Excellent verbal and written communication skills.

Preferred Skills:

• Experience with Visual Studio 2022 or later.
• Knowledge of Visual COBOL V7 or later.
• Experience troubleshooting client‑server applications.
• Experience collaborating with business users and external vendors to develop requirements, specifications, and test plans.
• Strong understanding of enterprise application architecture and software development best practices.

Education

Bachelor's Degree in Computer Science, Information Technology, or a related field preferred, or equivalent professional experience.