Full Stack Developer US-Remote Full time REQ-2026-162 OneSource Virtual (OSV) has helped more than 1,000 Workday customers take their teams from transactional to transformational with innovative technology and services for HR, payroll, and finance. Founded in 2008, OSV is the leading exclusive provider of Business-Process-as-a-Service (BPaaS) solutions for Workday, delivering services with unparalleled choice, unwavering commitment, and uncompromising support. OneSource Virtual’s global headquarters is located in Dallas, Texas, with additional locations across North America and Europe. Find your company’s solution at www.onesourcevirtual.com. Position Summary OneSource Virtual is seeking a Full Stack Developer to join our product engineering team. This is a staff-level individual contributor role for a developer who can work independently across the full stack, deliver high-quality features with no supervision, and actively contribute to the team’s technical direction. You will build and maintain software across C#/.NET services, React UI, and SQL on platforms that process over $200 billion in compliant payroll and tax payments annually. We are an AI-first engineering organization. The expectation at this level is not just that you use AI tools — it is that you use them fluently, set a good example for less experienced teammates, and contribute to how the team evolves its AI-assisted practices over time. Responsibilities Development - Execute all phases of the software development lifecycle — design, development, testing, bug fixes, refactoring, and technical debt reduction - Work full stack stories independently using simple, clean design solutions with a low defect rate - Implement software using the Microsoft stack (C#/.NET, Entity Framework, MVC) deployed in Azure/AWS cloud environments - Build and consume REST and SOAP web services; develop and maintain React front-end components - Perform data modeling tasks that match established best practice patterns and standards - Participate actively in work breakdown — asking questions, completing work plans, and surfacing potential problems before they arise - Demonstrate the ability to lead swarming efforts on complex user stories - Assist teammates, offer constructive feedback, and contribute to team-wide quality improvement AI-Assisted Development - Use AI coding tools (Windsurf, Claude Code, Cursor, or equivalent) fluently as a standard part of daily work — code generation, debugging, test writing, code review, and understanding unfamiliar codebases - Apply AI tools to improve delivery speed and code quality, not as a substitute for understanding the code you ship - Review and validate all AI-generated output before committing; set a visible standard for responsible AI use on the team - Offer informal guidance to associate-level developers on effective and responsible AI tool usage - Contribute to evolving team norms around AI tooling as practices and tooling change Agile & Collaboration - Be an active, contributing member of an Agile Scrum team — write stories, groom the backlog, and engage in all sprint ceremonies - Work closely with the development manager, technical lead, product owner, and scrum master to meet project commitments - Set accurate time estimates for work assigned to your area of knowledge and adjacent areas - Communicate proactively when timelines are at risk; work is thorough, complete, and of high quality - Learn and integrate platform-specific knowledge — Workday, Salesforce, and OSV’s payment and tax domain — as part of your ongoing development Competencies Staff level per OSV competency framework - Sets accurate time estimates and scope of work for assigned tasks and projects - Work is thorough, complete, and of consistently high quality - Proactively asks for help and communicates revised timelines when tasks will be delayed - Understands and can explain essential concepts in their area of knowledge - Understands work standards, why they are needed, and knows how to apply them - Works effectively with others as part of a team to solve problems - Demonstrates an understanding of OSV’s business and our customers’ business - Detail-oriented, analytically strong, and able to adapt quickly to changing information or priorities Qualifications Required - Bachelor’s degree in Computer Science, MIS, or a related technical field - 3+ years of experience developing applications using the Microsoft stack (C#/.NET, Entity Framework, ADO.NET, MVC) - 2+ years of experience building and consuming SOAP/REST web services - 2+ years of experience developing against relational databases with SQL - Experience with Agile/Scrum development methodology - Experience working in a CI/CD environment AI Proficiency - Demonstrated, hands-on daily use of AI coding tools (Windsurf, Claude Code, Cursor, or equivalent) — fluent usage is expected at this level, not a nice-to-have - Able to write effective prompts for code generation, refactoring, debugging, and test creation - Understands the limitations of AI-generated code and applies appropriate review rigor before committing - Comfortable discussing AI tool usage and contributing to team standards around it Preferred - React or front-end JavaScript framework experience - Experience with Salesforce development (APEX, SOQL, Lightning components) - Familiarity with Workday integrations or HCM platforms - Experience with cloud platforms (AWS, Azure) and cloud-native application patterns What You’ll Grow Into This role sits on OSV’s Associate → Full Stack → Senior Full Stack career path. Progression to Senior is competency-based: developers who demonstrate independent full stack delivery, mentorship of junior teammates, and leadership in story breakdown and swarming advance to the Senior level. Technical leads and architects are embedded in every team to support that growth. LI-REMOTE 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.

• Write clean, maintainable, and efficient code • Develop low to moderately complex features • Collaborate with team members to break down tasks • Partner with stakeholders to understand requirements

• Responsible for end-to-end DataCap solution development • Business requirement acquisition through requestor interviews • Solution design, application development using DataCap tools, and application deployment/ support • Creation of detailed estimates (time, effort, and infrastructure) based on functional and non-functional requirements • In-depth knowledge of all IBM DataCap components and tools • DataCap application configuration, including knowledge of rule sets and optimal settings • Performance of unit testing and integration testing of modules • Understanding workflow tasks and improvement opportunities • Creation of DataCap workflow definitions and identifying properties, including workflow improvement and optimization • Understanding the DataCap change management process • Map development changes to test scenarios

• AI-powered voice agents and conversational AI • Sentiment analysis and conversation intelligence • Backend automation and workflow orchestration • AI-assisted redaction of sensitive data (e.g., credit cards) • Data pipelines feeding AI systems • Integration of AI tools into existing enterprise systems