Senior Multi-Tenant .NET Backend & Integration Engineer

Senior Multi-Tenant .NET Backend & Integration Engineer

Location:

Jersey City, New Jersey (Onsite)

Role Overview

This is a hands‑on backend engineering role for a developer who will build and deploy a multi‑tenant SaaS application on AWS. You will write high-performance APIs using C# and .NET that communicate with DynamoDB, PostgreSQL, and various external client data sources. You will collaborate with Dev Ops and Network Engineers to guide infrastructure setup, test hybrid connectivity, and troubleshoot cross-network data access issues.

to work remote on a 12 month contract.

• Design, code, and optimize secure multi‑tenant APIs using C# and .NET Core that dynamically query and aggregate data across Amazon DynamoDB, PostgreSQL, and varied external client data sources.
• Provide clear architectural requirements to Dev Ops and Network Engineering teams regarding application infrastructure needs.
• Collaborate with network and infrastructure peers to validate secure backend connections to external client data centers.
• Diagnose, isolate, and debug end‑to‑end data routing issues between the AWS‑hosted API and remote external databases.

• Experience:
  
  5+ years of active, hands‑on backend development building distributed systems on AWS.
• Technical
  
  Skills:
  
  Expert‑level C#, .NET Core Deep hands‑on experience with Amazon DynamoDB, PostgreSQL (Entity Framework Core or Dapper), and writing abstract data access layers to query heterogeneous external data sources.
  
  Real‑world experience implementing application‑level tenant isolation, data partitioning, and tenant context middleware.
  
  Solid conceptual understanding of VPCs, AWS Private Link, and firewalls to effectively guide networking peers.
  
  Basic familiarity with cloud infrastructure deployment (Terraform, AWS CDK) to streamline pipeline integrations.
• Communication:
  Strong collaborative skills to translate complex application data requirements into actionable tasks for infrastructure teams.

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 Clearly Rateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

• 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 Support Linc 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…