FactSet ยท 3 months ago
Principal Software Engineer - (C# and the .NET Core ecosystem, Python) - Hybrid
United States, New York, 111 West 33rd Street
Full-time
Hybrid
Lead/Staff
$165K/yr - $215K/yr
10+ years expFactSet creates flexible, open data and software solutions for over 200,000 investment professionals worldwide. They are seeking an accomplished Principal Software Engineer to join the core team responsible for their mission-critical Investment Book of Record (IBOR), where the role involves designing, building, and enhancing services and interfaces to ensure the platform's reliability, scalability, and performance.
AnalyticsFinanceFinancial ExchangesFinancial ServicesInsurTechSoftware
Responsibilities
Design, develop, and maintain robust backend services and APIs using C# (.NET Core), focusing on high throughput and low latency
Build data processing pipelines, reconciliation tools, and analytical scripts using Python, leveraging libraries like Pandas and NumPy
Contribute to architectural and design decisions, ensuring our solutions are scalable, resilient, and maintainable
Participate in code reviews to maintain high standards of quality
Work with our database systems (MongoDB and MySQL) to ensure data integrity and performance
Work closely with Product Managers to understand requirements
Guide and mentor junior engineers
Qualification
Required
10+ years of professional software engineering experience
Expert-level proficiency in C# and the .NET Core ecosystem for building enterprise-grade backend systems
Strong professional experience with Python for data analysis, scripting, or backend services
Significant experience in the financial services industry, with a strong grasp of the trade lifecycle, financial instruments (equities, fixed income, derivatives), and position management concepts
Experience building and consuming RESTful APIs and a solid understanding of software design patterns
Bachelor's degree in Computer Science, Engineering, Mathematics, or a related field
Preferred
Direct experience working on an IBOR or Portfolio Management System
Experience with cloud platforms (AWS) and containerisation technologies (Docker/ ECS)
Experience working with ServiceStack
Company
FactSet
FactSet is a financial research company that offers risk analytics tools and data for institutional investors.
10001+ employees
H1B Sponsorship
FactSet has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (44)
2024 (25)
2023 (56)
2022 (86)
2021 (76)
2020 (79)
Funding
Current Stage
Public CompanyTotal Funding
unknown1996-06-28IPO
Leadership Team
Kate Stepp
Chief Technology Officer
Helen Shan
EVP and Chief Financial Officer
Recent News
2025-12-20
2025-12-19
2025-12-18
Company data provided by crunchbase