Senior Software Engineer, Core Finance Data Infra

Susquehanna International Group; Bala Cynwyd (PA); On-site; USD 140,000 - 190,000; Full time

Job summary

Susquehanna International Group in Bala Cynwyd, PA is seeking a Senior Software Engineer for the Operations Development group. You will build and own core middle and back-office data infrastructure powering Treasury and front office workflows, with emphasis on correctness, auditability, and reliability.

You will collaborate with Operations, Finance, and Treasury, contribute to architecture, and advance trade lifecycle and reconciliation tooling, while applying AI-assisted development to improve

Qualifications

• 5–7+ years of software development experience with C# and .NET.
• Strong SQL skills and ability to query large financial datasets.
• Experience building auditable, high-integrity systems.
• Proven ownership mentality and clear communication.

Responsibilities

• Build, maintain, and improve core middle/back-office systems end-to-end.
• Write clean, production-grade code with emphasis on correctness and auditability.
• Contribute to architecture and design discussions with peers.
• Debug complex data/system issues and resolve them independently.
• Leverage AI-assisted tooling to improve delivery quality and velocity.
• Develop books/records and reconciliation tooling across asset classes.

Skills

C# & .NET

SQL

Ownership mindset

Communication

Job description

Susquehanna International Group in Bala Cynwyd, PA is seeking a Senior Software Engineer for the Operations Development group. You will build and own core middle and back-office data infrastructure powering Treasury and front office workflows, with emphasis on correctness, auditability, and reliability.

You will collaborate with Operations, Finance, and Treasury, contribute to architecture, and advance trade lifecycle and reconciliation tooling, while applying AI-assisted development to improve