Software Engineer III

Your Team's Impact

Python & C++ Software Engineer 3 – Data Access (FIP)

FactSet is seeking a highly skilled and motivated Software Engineer to join our Data Access team — the single, powerful entry point to the FactSet Intelligence Platform (FIP). This is where every interaction begins: AI agents & tools, internal analytics, and client-facing APIs all connect through one unified endpoint and receive responses in a consistent, structured envelope enriched with provenance, source attribution, and entitlement transparency. Operating at the very front of FactSet's data ecosystem, you'll define this client-facing interface and orchestrate the systems behind it, delivering data with exceptional speed, security, reliability, and precision.

The platform handles immense volumes of low-latency requests, so strong engineering discipline is essential — you'll apply best practices in distributed systems, scalability, and performance to build infrastructure that is both resilient and efficient. It's a unique opportunity to shape a critical layer of FactSet's architecture, one that directly shapes the client experience and enables the next generation of intelligent applications. If you're passionate about building high-performance systems, simplifying complex data interactions, and making a measurable impact at scale, we'd love to hear from you.

What You'll Do 

• Design, develop, and deploy the Data Access interface that defines how clients access data.
• Implement query patterns and APIs that balance flexibility, performance, and security.
• Enforce entitlements to ensure clients access only authorized data products.
• Build observability into the layer — end-to-end request tracing, provenance, and source attribution surfaced in responses.
• Leverage metrics and KPIs to optimize query execution, incorporating caching and performance strategies to meet client SLAs.
• Own Data Access products and features, driving bug fixes, performance enhancements, and scalability improvements.
• Collaborate with stakeholders and cross-functional teams to continuously improve development processes.
• Participate in a regional on-call rotation to support production systems.

What We're Looking For

• Bachelor's Degree or equivalent in Computer Science or related field.
• 3+ years of software engineering experience with a focus on API development, query systems, or data infrastructure.
• Strong proficiency in Python and C++ with experience building production-grade, client-facing systems.
• Solid understanding of OOP principles and software design patterns.
• Experience with API design and building orchestration layers across multiple backend systems.
• Proven ability to work independently and collaboratively.
• Passion for designing and implementing efficient, scalable, and maintainable software.

Preferred Qualifications

• Experience with multithreaded programming, low latency, and high-availability systems.
• Knowledge of query engine architecture, parsers, compilers and interpreters.
• Experience implementing caching strategies for query results and metadata.
• Experience with service-oriented architecture and microservices design.
• Understanding of distributed systems and handling failures gracefully across service boundaries.
• Experience working with large-scale data systems and balancing latency, throughput, and cost.
• Background with rate limiting, throttling, and client quota management.

What's In It For You 

At FactSet, our people are our greatest asset, and our culture is our biggest competitive advantage. Being a FactSetter means: 

• The opportunity to join an S&P 500 company with over 45 years of sustainable growth powered by the entrepreneurial spirit of a start-up.

• Support for your total well-being. This includes health, life, and disability insurance, as well as retirement savings plans and a discounted employee stock purchase program, plus paid time off for holidays, family leave, and company-wide wellness days.  

• Flexible work accommodations. We value work/life harmony and offer our employees a range of accommodations to help them achieve success both at work and in their personal lives. 

• A global community dedicated to volunteerism and sustainability, where collaboration is always encouraged, and individuality drives solutions. 

• Career progression planning with dedicated time each month for learning and development. 

• Business Resource Groups open to all employees that serve as a catalyst for connection, growth, and belonging. 

Learn more about our benefits here. 

Salary is just one component of our compensation package and is based on several factors including but not limited to education, work experience, and certifications.