Software Engineer I

About The Company
At OneStream, we are dedicated to empowering every Finance organization and professional to exceed their potential. Our global teams span continents, cultures, and time zones, united by a shared purpose: building the operating system for modern Finance. We help organizations move with greater speed, clarity, and confidence. Behind every innovation, customer success, and milestone are talented people working together to make a difference. We seek individuals who think boldly, lead authentically, collaborate effectively, remain curious about possibilities, and are committed to delivering results. To learn more about our people, culture, and benefits, please explore our Careers site.

About The Role
OneStream Software delivers a unified Corporate Performance Management (CPM) platform tailored to meet the complex financial, operational, and analytical needs of large enterprises. Operating at enterprise scale, OneStream supports mission-critical workloads for the Office of the CFO across highly regulated industries. Our platform leverages a sophisticated technology stack including distributed multi-threaded services, OLAP and multidimensional data models, modern web frameworks, SQL-based persistence, and a cloud-native SaaS-oriented architecture on Microsoft Azure. We are seeking a Software Engineer to design, develop, test, and maintain software components within the OneStream platform. This role involves building high-quality features using established design patterns and best practices, owning assigned features throughout the software development lifecycle, and collaborating closely with senior engineers, Product, and Quality Assurance teams. Responsibilities include developing user interfaces, APIs, and data access logic, participating in code reviews, and assisting in diagnosing and resolving defects and production issues to ensure reliable, high-performing solutions and an excellent customer experience. Success will be measured by code quality, reliability, learning velocity, and the ability to deliver well-scoped features safely and predictably. Qualifications
• Bachelor’s degree in Computer Science, Software Engineering, or related technical field, or equivalent practical experience.
• 2–4 years of professional software development experience.
• Experience with object-oriented programming and the Microsoft technology stack, including C#, .
NET, and ASP.
NET.
• Basic experience with modern UI frameworks such as Angular, React, Blazor, and WPF.
• Familiarity with data formats and markup languages such as JSON and XML.
• Working knowledge of relational databases and SQL fundamentals.
• Experience using source control systems (Git) and participating in CI/CD workflows.
• Ability to write and review unit tests to validate functionality.
• Preferred qualifications include experience building enterprise or platform-oriented applications, familiarity with cloud-hosted or SaaS-based systems, introductory experience with automated testing practices, and familiarity with AI-assisted development tools such as Cursor and Claude Code.
• Strong problem-solving and debugging skills.
• Effective written and verbal communication skills.
• Ability to work collaboratively in a team-oriented environment.
• Attention to detail and commitment to code quality. Responsibilities
• Design, develop, test, and maintain high-quality software components within OneStream solutions.
• Implement features using established design patterns and best practices under guidance from senior engineers.
• Contribute to UI development using modern UI frameworks including Angular, React, and Blazor.
• Develop and integrate APIs and services following RESTful standards and practices.
• Write clean, maintainable, and well-documented code with appropriate unit test coverage.
• Utilize AI-assisted development tools to accelerate development, refactoring, test creation, and documentation while validating AI-generated output for correctness, security, and architectural alignment.
• Participate in peer code reviews to improve code quality and consistency.
• Assist in diagnosing, debugging, and resolving software defects across development and test environments.
• Collaborate with Product, QA, and other engineering team members to deliver features that meet functional and quality expectations.
• Follow established software development lifecycle (SDLC), security, and compliance protocols. Benefits
• Competitive gross annual base salary commensurate with experience, skills, and location.
• Additional variable compensation and benefits may apply.
• Opportunities for professional growth and development within a global, innovative company.
• Collaborative and inclusive work environment focused on delivering impactful solutions.
• Access to advanced technology and AI-assisted development tools.
• Comprehensive health and wellness programs (details available upon inquiry). Equal Opportunity OneStream Software is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable local laws, regulations, and ordinances. We are committed to fostering a diverse and inclusive workplace where all employees can thrive.