Remote Senior .NET Backend for Multi-Tenant SaaS on AWS

Apex Systems; Jersey City (NJ); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) plan

ESPP

HSA

EAP

Job summary

Everforth Apex is seeking a Senior Multi-Tenant .NET Backend & Integration Engineer to build a high-performance SaaS backend in Jersey City, NJ. The role focuses on C#, .NET Core APIs interfacing with DynamoDB and PostgreSQL, plus cross-team collaboration on infrastructure and security.

You will drive architectural guidance, implement tenant isolation, and troubleshoot multi-system data flows, while coordinating with DevOps and networking peers for reliable, secure connectivity.

Qualifications

• 5+ years of hands-on backend development experience in distributed systems on AWS.
• Expert-level C#, .NET Core and APIs communicating with DynamoDB and PostgreSQL.
• Experience with EF Core or Dapper and data access layers across external sources.
• Knowledge of VPCs, PrivateLink, firewalls and cloud networking guidance.

Responsibilities

• Design, code, and optimize multi-tenant APIs using C# and .NET Core for data across DynamoDB, PostgreSQL, and external sources.
• Provide architectural requirements to DevOps and Network Engineering for infrastructure needs.
• Collaborate with network and infrastructure teams to validate secure backend connections to external data centers.
• Diagnose and debug end-to-end data routing between AWS-hosted API and remote databases.

Skills

Backend development

C#

.NET Core

DynamoDB

PostgreSQL

EF Core

Dapper

AWS

Terraform

AWS CDK

Tenant isolation

Data partitioning

Tools

DynamoDB

PostgreSQL

EF Core

Dapper

Terraform

AWS CDK

Job description

Everforth Apex is seeking a Senior Multi-Tenant .NET Backend & Integration Engineer to build a high-performance SaaS backend in Jersey City, NJ. The role focuses on C#, .NET Core APIs interfacing with DynamoDB and PostgreSQL, plus cross-team collaboration on infrastructure and security.

You will drive architectural guidance, implement tenant isolation, and troubleshoot multi-system data flows, while coordinating with DevOps and networking peers for reliable, secure connectivity.