About this role

Love complex problems? We’re looking for a OneStream Architect who does more than just configure. We need a seasoned pro with 5+ years of experience and a deep command of C#/VB.NET and Financial Consolidation to lead high-stakes implementations. If you’re a hands-on developer who thrives on building elegant solutions to intricate financial workflows, we want you on the team.

General Information:

Start date: 01.06.26
latest Start Date: 01.09.26
Planned duration: planned until 30.08.2027
Extension (in case of limitation): possible
Workload: 80-100%
Home Office: 50%
Working hours: Standard

Tasks & Responsibilities:

Design and Development: Contribute to the design, development, testing, and deployment of OneStream solution for finance consolidation, Tax (CbCR & Pillar-two) and ESG, including enhancements, customizations, and integrations.
System Implementation: Participate in the full lifecycle of our OneStream project, from design to go-live and post-implementation support.
Technical Leadership: Provide technical support and guidance to co-workers, ensuring adherence to best practices and coding standards and fostering a culture of continuous learning and growth. Advocate for and ensure adherence to OneStream coding standards, best practices, and performance optimization.
Collaboration: Work closely with functional teams, project managers, and other stakeholders to understand business needs and translate them into technical solutions.
Documentation: Develop and maintain technical documentation, including design specifications, test plans, and user manuals
Support and Maintenance: Provide ongoing support and maintenance for OneStream, including troubleshooting and issue resolution.

Must Haves:

Bachelor’s degree in computer science, Systems Engineering, Information Systems, or related field.
Deep technical expertise in OneStream, with 5+ years of OneStream implementation and development experience (OneStream certification preferred).
Hands-on configuration and development experience:
Building and managing dimensions, hierarchies, and member properties.
Developing complex Business Rules (C#) for calculations, validations, and data transformations.
Designing and building Cube Views, Dashboards, and Reports.
Designing and building workflows, user role/permissions & securities.
Developing data transformation rules (ETL) to map source data to OneStream's data model.
In-depth understanding of Financial Consolidation topics, month-end close processes and ability to hold discussions with business counterparts.
Business-focused, results-oriented approach with excellent coordination, exceptional problem-solving, and analytical skills, with a mindset to challenge assumptions, resolve discrepancies and ensure integrity of consolidated results.
Team and hands-on working style, good organisational skills with ability of multi-task while working independently or within a group environment.
Ability to work effectively in a project-oriented, fast-paced, deadline-driven environment.
Excellent interpersonal and customer relationship skills.
Exceptional communication and influencing skills.
Business fluent English language skills (written and spoken).
Hands-on experience in implementing, configuring and developing reporting within the OneStream platform.
Understanding of modern software architecture, integration tools, and methods (e.g., Data Connectors, APIs, ETL solutions).
Advanced proficiency in VB.NET or C# and SQL.
Ability to create technical design documents, and facilitate or validate system and user acceptance testing.
Participates in knowledge transfer to build internal capacity, advising, and training the internal team on the new application.