Senior Multi-Tenant .NET Backend & Integration Engineer

Job#: 3049637

Job Description:
Hey Everyone,
Hope all is well. Pat from Everforth Apex Systems here. Coming to you with another position for one of our clients in the New Jersey market. I am looking for a .NET Developer, to work remote on a 12 month contract. Standard .NET work along with AWS, PostgreSQL or DynamoDB, and some DevOps/Infra work using tools such as Terraform and AWS CDK. As always my trusty AI assistant Riley will help me with sourcing, but if you are a slam dunk fit, please send me your email directly to to bypass the new age.

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 DevOps and Network Engineers to guide infrastructure setup, test hybrid connectivity, and troubleshoot cross-network data access issues.

Key Responsibilities

• 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 DevOps 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.

Required Qualifications

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 PrivateLink, 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 ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.

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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.

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