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 organizations maximize their Workday investment and operate it 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.Application Instructions: Email: [email protected] & reference Job ID# OSV-TX26-SDEV in the subject line. EOE
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.
Skills Required
- Bachelor's degree in Computer Science, Computer Engineering, Computer Science and Telecommunications Engineering, or a related field
- 3 years of experience designing, developing, and maintaining backend components and services using C# and the .NET framework, including .NET Core
- Experience developing RESTful APIs and implementing secure authentication and authorization protocols such as JWT and OAuth
- Experience designing, implementing, and optimizing relational database schemas, stored procedures, and queries using Microsoft SQL Server
- 2 years of experience developing and maintaining financial systems and compliance reporting solutions
- 2 years of experience developing and implementing integration solutions between financial systems and CRM platforms
OneSource Virtual Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about OneSource Virtual and has not been reviewed or approved by OneSource Virtual.
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Healthcare Strength — Healthcare coverage is presented as comprehensive, including medical, dental, vision, life/disability, and mental-health support, with both copay and HDHP/HSA-style options. Domestic-partner eligibility and standard support services like an EAP are also described as available.
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Leave & Time Off Breadth — Time-off and flexibility are portrayed as comparatively strong, with PTO/“unlimited” or flexible time-off framing and paid volunteer time referenced. Remote work is repeatedly positioned as a valued part of the overall rewards experience tied to work–life balance.
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Wellbeing & Lifestyle Benefits — Financial-wellbeing and lifestyle add-ons are highlighted through earned-wage access and wallet-style tools (e.g., myFlexPay/myFlexWallet) alongside mentions of items like a fitness stipend and company-sponsored events. These extras are framed as modern perks that can improve day-to-day benefits usefulness beyond core insurance.
OneSource Virtual Insights
What We Do
OneSource Virtual (OSV) is the Workday partner that has helped more than 1,300 companies with everything from deployment to maintenance to payroll and more—all to make the day more doable. Founded in 2008, OSV pioneered Business Process as a Service (BPaaS) and has become the leading provider of automated solutions for organizations of all sizes using Workday, delivering services with unparalleled choices, unwavering commitment, and uncompromising care.
