Senior Software Engineer, C++

Build Technology That Powers Global Finance

FactSet Research Systems is a leading American fintech company trusted by the world’s top financial institutions. Every day, our technology empowers investment professionals to make smarter decisions using cutting-edge data and analytics.

In Sofia, we’re building one of FactSet’s fastest-growing engineering hubs. We combine the stability of a global company with the energy of a modern tech center—where your work has real impact on products used across the world.

We’re looking for a skilled Software Engineer to join our Risk Model Services team. This team develops and manages the models behind FactSet’s Risk Engine, a mission-critical system that calculates investment analytics at global scale. You’ll work on projects that handle terabytes of structured data, ensuring high performance, scalability, and reliability.

What You’ll Do

• Design, build, and optimize large-scale services used by top financial institutions
• Work across the full software lifecycle: analysis, design, development, testing, and production support
• Tackle complex engineering challenges in performance, scalability, and distributed systems
• Collaborate with highly skilled engineers in Sofia and across the globe
• Grow your technical and leadership skills in an environment that values innovation and learning

What We Offer

• Global impact – Your code powers decisions at the world’s largest financial institutions
• Career growth – Access to the latest technologies, training, and mentorship from experts you can trust and learn from
• Inclusive culture – Join a diverse team that values collaboration, innovation, and open communication
• Modern tech hub – Be part of FactSet’s Sofia office, combining global reach with local flexibility
• Work-life balance – Hybrid setup, competitive benefits, and support for continuous learning

What We’re Looking For

• 5+ years of experience in software engineering
• Strong C++ skills, with experience in complex projects
• Experience with enterprise-scale software development
• Knowledge of web-service technologies and NoSQL databases
• Familiarity with Linux shell; experience with cloud environments (AWS/Heroku a plus)
• Test-driven mindset and solid troubleshooting abilities
• Bachelor’s degree in Computer Science, Engineering, or related field

Bonus Skills

• Strong analytical and communication skills
• Passion for mentoring, teamwork, and collaboration
• Curiosity about financial markets and portfolio management
• Experience with agile/Scrum

What We Offer

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

• Attractive remuneration with annual bonus opportunity
• Flexible hybrid work model – 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.
• Support for your total well-being:
• This includes health, life, and disability insurance, plus paid time off for holidays, family leave, and companywide wellness days.
• Full private health insurance including dental coverage for you and your family
• Lunch benefits included
• Full coverage of Multisport card
• Up to 27 days of vacation
• Learning time
• Professional certifications support and coverage (eg CFA, FRM, AWS, etc.)
• Challenging and dynamic environment
• Job training and learning programs
• Work in an enthusiastic team of talented co-workers
• Great office location and work environment
• Contributing to a firm with over 40 years of consecutive growth, FactSet has been named one of TIME’s America’s Best Mid-Size Companies 2025 and US News’ Best Companies to Work For 2025–2026. These honors build on FactSet’s legacy of workplace honors, including previous recognition as a Glassdoor Employees’ Choice Award winner and as a FORTUNE 100 Best Companies to Work For.
• Corporate Social Responsibility program and various of Business Resource Groups – a global community dedicated to volunteerism, sustainability, and inclusivity, where collaboration is always encouraged, and individuality drives solutions.
• Career progression plans with dedicated time each month for learning and development.