CSharp Developer

Apex Systems; Lake (MS); Remote; USD 125,000 - 146,000; Full time

Job summary

Everforth Apex is seeking a Sr. Software Engineer in Lake Nona, Florida (Remote) for a 12-month contract. You will work on legacy C#/.NET code, build and integrate API services using REST and SOAP, and collaborate across teams in an Agile-style setup.

Responsibilities include troubleshooting, refactoring, Azure-based development with Azure DevOps and Service Bus, Cosmos DB, Coupa integration, and ensuring robust, scalable enterprise solutions.

Qualifications

• 8–10 years of professional C#/.NET development experience.
• Experience creating API services using REST and SOAP.
• Strong knowledge of Azure, including Azure DevOps and Azure Service Bus.
• Experience with Cosmos DB, web services (REST), ASP.NET MVC/Core, and SQL basics.
• Experience with Selenium and Postman for testing.
• Familiarity with older .NET versions and financial industry experience is a plus.

Responsibilities

• Troubleshoot and analyze existing codebases to resolve issues.
• Review and refactor legacy code for performance and maintainability.
• Develop and integrate C#/.NET applications with enterprise systems.
• Create and manage Enterprise and Microservices using REST/SOAP APIs.
• Contribute to Azure-based development including Service Bus and DevOps.
• Interface with Coupa and other applications; work in three-week sprints within an Agile-like environment.

Skills

C#/.NET development

Azure

REST & SOAP APIs

Cosmos DB

Azure DevOps

Selenium & Postman testing

Azure Service Bus

Tools

Azure DevOps

Cosmos DB

Coupa

Job description

Job#: 3052189

Sr. Software Engineer

Location: Lake Nona, Florida (Remote)

Duration: 12 month contract with likely extensions

Rate: $60-70/hr. on w2

Authorization: Candidates must be able to work directly on our w2 without requiring sponsorship now or in the future

We are seeking a senior-level C# Developer to assist with troubleshooting, analysis, and development across various applications. The role involves working with legacy Microsoft code, integrating applications using API services, and contributing to multiple ongoing projects. This position is more project-focused than support-oriented and offers an opportunity to work on a long-term, multi-year engagement.

Key Responsibilities

• Troubleshoot and analyze existing codebases to identify and resolve issues.
• Review and refactor legacy code to improve performance and maintainability.
• Develop and integrate applications written in C#/.NET with various enterprise systems.
• Create and manage both Enterprise and Microservices using REST and SOAP APIs.
• Contribute to Azure-based development, including work with Azure Service Bus and Azure DevOps.
• Interface with proprietary and COTS applications, such as Coupa for purchasing.
• Participate in an Agile-like environment, working within three-week sprints.

Required Qualifications

Experience: 8-10 years of professional C#/.NET development experience.

Technical Skills

• Proficiency in modular and object-oriented programming for C# with the .NET Framework (version 4.5 and up), including .NET Core.
• Experience creating API services (Enterprise & Micro) using both REST and SOAP.
• Knowledge of Azure, including Azure DevOps and Azure Service Bus.
• Experience with Cosmo DB.
• Familiarity with web services (primarily REST), ASP.NET MVC or Core, and basic SQL.
• Experience with testing tools such as Selenium and Postman.

Preferred Qualifications

• Knowledge of older .NET framework versions (3 and 4).
• Experience in the financial industry.
• Familiarity with JIRA and Oracle Cloud.

Work Environment

This role is part of a dynamic team that includes Business Analysts, Automation Engineers, and UI developers. The team operates in a hybrid environment that is moving towards a more formal Agile methodology. The successful candidate should be a team-oriented individual with strong communication skills, confidence, and the ability to take initiative on projects.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

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© 2026 Everforth, Inc. All rights reserved.

Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.