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Apex Systems Logo Apex Systems · IT - Software Development

Application Programmer III

United States, Jersey City 60.00 - 68.00 USD / Hour · Job Posted April 01, 2026
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Job Description

We are seeking an Application Programmer to design, develop, and enhance backend services and user interface components. The role involves working with cross-functional teams to build and maintain RESTful APIs, microservices, and integration endpoints. This position requires participation in the full Agile software development lifecycle, from story refinement to deployment.

Job Responsibility

  • Design, develop, and enhance backend services using C#, .NET 8+, and ASP.NET Core
  • Build and maintain RESTful APIs, microservices, and integration endpoints
  • Implement data access logic using Entity Framework / EF Core and optimize SQL queries
  • Develop, modify, and maintain UI components using Angular and/or React
  • Write and maintain unit tests and integration tests as part of standard development
  • Execute and contribute to automated test suites, including regression and performance tests
  • Analyze testing reports, identify root causes for failures, and collaborate with QA to resolve issues
  • Participate in story refinement sessions to understand business and technical requirements
  • Engage in Agile ceremonies, including daily stand-ups, sprint planning, demos, and retrospectives
  • Document technical details related to development and system architecture

Requirements

  • Expert-level .NET / C# development experience
  • Strong knowledge of ASP.NET Core / .NET 6+
  • Strong knowledge of Angular and/or ReactJS
  • Experience building and consuming REST APIs
  • Proficiency with Entity Framework / EF Core
  • Solid understanding of microservices architecture
  • Strong SQL Server skills, including queries, stored procedures, and performance tuning
  • Experience with unit testing frameworks such as xUnit, NUnit, or MSTest

Nice to have

  • Strong debugging, analytical, and problem-solving abilities
  • Excellent communication and collaboration skills to work effectively with cross-functional teams
  • Ability to work independently with minimal supervision
  • A strong ownership mindset and a high degree of accountability
  • Ability to thrive in a fast-paced, deadline-driven environment

What we offer

  • Medical, dental, vision, life, disability, and other insurance plans
  • ESPP (employee stock purchase program)
  • 401K program with company match after 12 months
  • HSA (Health Savings Account on the HDHP plan)
  • SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions
  • Corporate discount savings program
  • On-demand training program
  • Access to certification prep and a library of technical and leadership courses/books/seminars after 6+ months
  • Certification discounts and other perks to associations that include CompTIA and IIBA
  • Dedicated customer service team
  • Certified Career Coach
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