OneStream Senior Developer – 6915 ADA

 

Our client is a leading Swiss multinational healthcare company headquartered in Basel, Switzerland. Operating in Pharmaceuticals and Diagnostics, it is one of the world’s largest biopharmaceutical companies and a global leader in in-vitro diagnostics and cancer treatments.

We are looking for a highly skilled and experienced OneStream Senior Developer for an initial 1 year contract basis with potential extension. You should have a proven track record of successful OneStream project implementations, exhibiting strong problem-solving abilities, and a passion for delivering high-quality software solutions.

 

This is a hybrid role requiring 3 days per week onsite in Basel.

 

The perfect candidate should have a Bachelor’s or Master’s degree in a relevant field and strong expertise in OneStream, including over five years of implementation and development experience. It involves hands-on work with system configuration, business rules (C#), data transformations, reporting, workflows, and financial consolidation processes.

 

Candidates should possess solid technical skills in VB.NET or C#, SQL, and modern integration methods, along with the ability to create technical documentation and support testing. Strong communication, problem-solving, and teamwork skills are essential, along with the ability to work in fast-paced, project-driven environments and support knowledge transfer within the organization.

Main 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.

 

Qualifications and Experience:

·     Relevant Swiss working/residency permit or Swiss/EU-Citizenship required

·      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).

·      Developing complex Business Rules (C#) for calculations, validations, and data transformations.

·      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

·      Hands-on configuration and development experience:

·      Building and managing dimensions, hierarchies, and member properties.

·      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.

·      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.

·      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.

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