OneStream Developer

At a glance

Position purpose

The OneStream Developer is responsible for the design, development, enhancement, integration, and ongoing support of the OneStream Corporate Performance Management (CPM) platform. This role ensures that OneStream solutions meet business requirements for Financial Planning & Analysis (FP&A), Consolidation, Reporting, Forecasting, and Financial Data Management.

The successful candidate will develop custom business functionality, automate financial processes, build integrations with enterprise applications, and contribute to the continuous improvement of the OneStream platform. The role requires strong .NET development expertise, database knowledge, and experience with modern software development practices.

Key Responsibilities

Application Development & Customization

• Design, develop, and maintain custom OneStream solutions.


• Create and enhance Business Rules, Calculations, Workflows, Dashboards, and Data Management processes.


• Develop automation solutions to improve financial processes and reduce manual effort.


• Implement custom functionality using OneStream extensibility features.


• Support enhancements related to Financial Consolidation, Planning, Budgeting, Forecasting, and Reporting.

Technical Development

• Develop custom Business Rules and application extensions using C# and VB.NET.


• Build, test, and deploy .NET-based solutions within the OneStream platform.


• Create automation routines, calculations, and validation logic supporting business requirements.


• Optimize application performance and troubleshoot complex technical issues.


• Ensure maintainable, scalable, and secure coding practices.

Data Integration & Data Management

• Design and maintain integrations between OneStream and enterprise systems such as: SAP S/4HANA, SAP ECC, Data Warehouses, HR Systems, Treasury Applications and other Finance Applications


• Develop and maintain ETL processes and data pipelines.


• Write and optimize SQL queries, procedures, and data extraction routines.


• Support master data management and data governance activities.


• Ensure data quality, reconciliation, and integrity across all connected systems.

DevOps & Release Management

• Utilize modern development environments including: Visual Studio, Visual Studio Code, OneStream Developer Studio


• Apply source control and version management using Git.


• Support CI/CD processes and structured release management.


• Participate in testing, deployment, and production support activities.


• Maintain technical documentation and development standards.

Support & Stakeholder Collaboration

• Collaborate with Finance, Controlling, FP&A, IT, and external implementation partners.


• Analyze business requirements and translate them into technical solutions.


• Provide third-level technical support for OneStream incidents and enhancements.


• Participate in project initiatives, upgrades, and platform optimization activities.


• Support system audits, compliance requirements, and internal controls.

Required Qualifications and Experience

Education

• Bachelor's or Master's degree in: Computer Science / Information Technology /Software Engineering / Business Information Systems or a comparable discipline


• 3+ years of software development experience


• Experience with CPM, EPM, or Financial Systems implementations.


• Hands-on experience with OneStream development is preferred.


• Experience supporting Finance applications within an enterprise environment.

Required Technical Skills

Development

• Strong proficiency in:
  
  
  
  • C#
  
  
  • VB.NET
  
  
  • .NET Framework / .NET Core
  
  
  
  


• Experience developing:
  
  
  
  • Custom Business Rules
  
  
  • Calculations
  
  
  • Workflows
  
  
  • Automation solutions
  
  
  • Application extensions
  
  
  
  

Data & Integration

• Strong SQL development skills.


• Experience with relational database platforms such as:
  
  
  
  • Microsoft SQL Server
  
  
  • Oracle
  
  
  • Snowflake (preferred)
  
  
  
  


• Experience designing ETL and data integration processes.


• Understanding of API and enterprise application integration concepts.

Tools & Development Environment

• Proficiency with:
  
  
  
  • Visual Studio
  
  
  • Visual Studio Code
  
  
  • Git
  
  
  • Azure DevOps (preferred)
  
  
  • OneStream Developer Studio
  
  
  
  


• Experience with source control, code reviews, and release management processes.


• Understanding of CI/CD concepts and deployment automation.

Finance & Business Understanding

• Understanding of:
  
  
  
  • Financial Consolidation
  
  
  • Management Reporting
  
  
  • Budgeting & Forecasting
  
  
  • Financial Planning & Analysis (FP&A)
  
  
  • Corporate Performance Management (CPM)
  
  
  
  

Competencies

• Strong analytical and problem-solving skills.


• Excellent communication and stakeholder management capabilities.


• Ability to work independently and within cross-functional teams.


• Attention to detail and commitment to high-quality delivery.


• Continuous improvement mindset.


• Ability to manage multiple priorities in a dynamic business environment.

Preferred Qualifications

• OneStream Certified Professional.


• Experience with SAP S/4HANA integration.


• Experience in a multinational manufacturing or consumer goods environment.


• Knowledge of cloud technologies and Azure platforms.


• Familiarity with financial data governance and compliance requirements.

Success Measures

The OneStream Developer will be successful when:

• OneStream applications operate reliably and efficiently.


• Financial processes are automated and standardized.


• Integrations deliver accurate and timely data.


• Enhancements are delivered according to agreed timelines and quality standards.


• Business stakeholders experience improved reporting, planning, and consolidation capabilities.


• Technical debt is minimized through adherence to development standards and best practices.

Refresco Leadership Expectations

The role holder demonstrates ownership, accountability, collaboration, continuous improvement, customer focus, and a commitment to delivering business value through technology-enabled financial solutions.

What we offer you.

At Refresco, we believe that your work should be rewarding, both professionally and personally. That’s why we offer you:

• Competitive pay with eligibility for an annual bonus


• No personal pension contribution – your pension is fully paid by Refresco


• 28 days of holiday (based on full-time employment) to recharge and enjoy your time off


• Continuous opportunities to develop yourself, with access to tailored courses, interactive e-learnings,


• Free access to OpenUp for you and your family members, supporting mental well-being and personal development


• A modern office nearby the vibrant city of Rotterdam


• Fun and connection through regular events organized by our enthusiastic Fun Committee


• Opportunities for professional development and training to help you grow in your career


• An NS Business Card or commuting allowance, making your journey to the office more convenient


• Memorable moments together, from our weekly shared Thursday lunches to annual events like Wellbeing Week, the Christmas dinner, and our Holding trip.


• A culture shaped by our core values: entrepreneurial, passionate, agile, responsible and excellent.

Recruitment process

Are you interested in this open position, feel free to send your application!

To ensure a fair and thorough selection, an assessment may be conducted as part of the recruitment process. 

In case of any questions with regards to the position, you may reach out to Yasimin Harput (Corporate Recruiter Group/HQ)E-mail: [email protected]

Important to know: We are currently unable to offer relocation support for this position. Candidates must be based locally in The Netherlands.