Software Developer

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) has worked exclusively with Workday customers since 2008 to deliver compliant, in-tenant technology and expert services to automate the administrative, transactional tasks of payroll, taxes, earned wage access, accounts payable, and benefits. With over 1,500 customers, 92% retention, and $225+ billion in treasury movement annually, OSV helps organizationsmaximize their Workday investment andoperateit with confidence. Payroll, benefits, and finance solutions — all in one place.

DUTIES: Design and develop backend components for enterprise financial and compliance applications, focusing on payroll tax management for state withholding and unemployment insurance (e.g., Alabama A-6, Georgia G-7, Michigan 5080, Washington PFML), payment processing, and electronic filing; leveraging C#, .NET Core, .NET 8, and MS SQL Server to build scalable RESTful APIs, integrating with state tax portals (e.g., My Alabama Taxes, Georgia Tax Center) and ensuring compliance with IRS e-filing standards, with robust error handling and audit logging. Integrate business applications with CRM platforms to enable secure and efficient data exchange of customer, payroll tax, and compliance information, using RESTful APIs and industry-standard authentication protocols such as JWT, OpenID, OAuth2. Develop and maintain data-intensive systems to support high-volume processing of financial transactions, tax liabilities, and compliance reports, leveraging background job schedulers (e.g., CRON jobs, background services) to optimize automation and system performance. Modernize and secure legacy application modules by implementing robust authentication and authorization mechanisms, refactoring code for maintainability, and ensuring compliance with evolving business and security standards. Collaborate with cross-functional teams to translate complex business requirements into robust software logic for tax calculations, payment distribution, data validation, and reporting, ensuring solutions meet organizational and regulatory standards. May work from a home office and anywhere in the U.S. #LI-DNI

MINIMUM REQUIREMENTS: Bachelor’s degree in Computer Science, Computer Engineering, Computer Science and Telecommunications Engineering, or related field, and 3 years of work experience to involve: (1) demonstrated expertise in designing, developing, and maintaining backend components and services using C# and the .NET framework (including .NET Core) for enterprise-scale applications, with a focus on reliability, scalability, and maintainability; (2) RESTful API development and secure authentication, including the implementation of industry-standard authentication and authorization protocols such as JWT and OAuth; (3) MS SQL/Database design and optimization, including design, implement, and optimize relational database schemas, stored procedures, and queries using Microsoft SQL Server (MS SQL) to support data-intensive business processes and ensure high performance and data integrity. Additionally, 2 years of experience to involve: (4) development experience in Financial Systems and System Integration, including the design, development, and maintenance of financial solutions and compliance reporting; and (5) proven ability to develop and implement integration solutions between financial systems and CRM platforms. May work from a home office and anywhere in the U.S.

You are encouraged to learn and share ideas when you join the OneSource Virtual team. We reward innovative thinking, fresh perspectives, creative collaboration, and hard work. As an organization experiencing routine strategic growth, we are always on the lookout for intelligent, talented, and forward-thinking professionals to join our team. OSV employees enjoy a values-based culture, upward mobility, and professional development with opportunities of all kinds.