OneStream Developer

Role Description

We are seeking an experienced OneStream Developer to join our FinTech team and assume hands-on technical ownership of a complex OneStream implementation as it enters User Acceptance Testing (UAT) and transitions into production. This is a highly technical development role requiring extensive experience building, supporting, and enhancing custom OneStream planning applications. The successful candidate will work closely with Finance, FP&A, IT, and implementation partners to troubleshoot issues, develop new functionality, support production readiness, and become the primary technical resource responsible for the ongoing evolution of the platform.

Success in this role means becoming the trusted technical expert for the OneStream platform by:

• Rapidly understanding the existing application
• Resolving complex technical issues
• Delivering high-quality enhancements
• Supporting Finance and FP&A users
• Ensuring the long-term stability and evolution of a highly customized enterprise planning solution

Qualifications

• 10+ years of hands-on OneStream development experience
• Strong experience developing custom OneStream solutions using C#
• Proven experience developing and supporting custom register-based planning solutions
• Experience with complex multi-cube OneStream environments
• Strong understanding of FP&A processes including budgeting, forecasting, workforce planning, and management reporting
• Experience with BRApi, Custom Business Objects, Extender APIs, and OneStream extensibility
• Experience using Custom Tables, DataBuffers, Stage Tables, and advanced data processing techniques
• Experience developing Dynamic Dashboards, Workspaces, Cube Views, and custom user interfaces
• Experience with Data Management, Metadata Management, Workflow configuration, and Security
• Experience supporting enterprise integrations using REST APIs, and SQL
• Experience supporting applications through UAT, production deployment, and ongoing operational support

Requirements

• Develop, maintain, and enhance custom OneStream functionality using C# and the OneStream extensibility framework
• Develop and support custom planning applications, calculations, business logic, and reusable platform components
• Build, troubleshoot, and optimize register-based planning solutions
• Enhance Dynamic Dashboards, Workspaces, Cube Views, and user-facing planning functionality
• Develop and maintain Business Rules, BRApi components, custom Business Objects, and Extender APIs
• Design and optimize data movement using DataBuffers, Stage Tables, BI-Blend, and custom processing logic
• Develop solutions using Custom Tables to support planning applications, metadata management, and application configuration
• Assume hands-on technical ownership of the OneStream application from the implementation partner
• Investigate production issues and UAT defects through detailed root cause analysis
• Implement enhancements, resolve defects, and improve application performance
• Participate in code reviews, release deployments, regression testing, and production support
• Contribute to technical documentation and knowledge transfer activities
• Support Budgeting, Forecasting, Rollforward, and Reporting processes
• Enhance driver-based planning models and custom planning workflows
• Work closely with Finance and FP&A teams to implement new business requirements
• Support complex planning models spanning multiple cubes and business divisions
• Develop and support integrations between OneStream and Oracle Fusion, Workday, Salesforce, Databricks, and other enterprise platforms
• Troubleshoot Data Management processes, metadata synchronization, and data transformations
• Develop REST API and SQL-based integration solutions where required

Benefits

• Medical, vision, dental and mental health benefits for you and your family, with access to a health care concierge, and Flexible or Health Savings Accounts (FSA or HSA)
• Free concert tickets, generous paid time off including paid holidays, sick time, and personal days
• 401(k) program with company match, stock reimbursement program
• New parent programs including caregiver leave, plus fertility, adoption, foster, or surrogacy support
• Career and skill development programs with School of Live, tuition reimbursement, and student loan repayment
• Volunteer time off, crowdfunding match