Senior .NET Backend Engineer – Payroll & Tax Systems

OSV; United States; Remote; USD 110,000 - 150,000; Full time

Benefits offered by this job

Remote work

Home office option

Job summary

OneSource Virtual (OSV) is seeking a skilled backend engineer to design and implement enterprise financial and compliance solutions. You will focus on payroll tax management, payment processing, and secure data exchange with CRM systems, using C#, .NET Core, .NET 8, and MS SQL Server.

Join a collaborative team and contribute to scalable, compliant systems while working remotely from anywhere in the United States.

Qualifications

• Bachelor’s degree in CS/CE or related field and 3 years backend experience with C#/.NET.
• Experience with RESTful API development and secure authentication (JWT/OAuth).
• MS SQL database design and optimization for enterprise-scale apps.
• 2 years in Financial Systems integration and CRM data exchanges.

Responsibilities

• Design and develop backend components for payroll tax management and payment processing.
• Build scalable RESTful APIs using C#, .NET Core/.NET 8, and MS SQL Server.
• Integrate with state tax portals and CRM systems with JWT/OAuth security.
• Ensure error handling, auditing, and compliance with IRS e-filing standards.
• Collaborate with cross-functional teams to translate business requirements into robust software logic.

Skills

C#

.NET Core

.NET 8

MS SQL Server

REST APIs

JWT/OAuth

Backend design

Financial systems

Education

Bachelor’s degree in Computer Science or related field

Job description

OneSource Virtual (OSV) is seeking a skilled backend engineer to design and implement enterprise financial and compliance solutions. You will focus on payroll tax management, payment processing, and secure data exchange with CRM systems, using C#, .NET Core, .NET 8, and MS SQL Server.

Join a collaborative team and contribute to scalable, compliant systems while working remotely from anywhere in the United States.