Software Developer | Trade Finance and Internal Positions | Experienced Hire

We are looking for a Senior Software Engineer to join our Operations Development group where you will be a hands-on technical contributor building the foundational data infrastructure that powers our middle and back office operations. The systems you work on authoritative books and records PnL reconciliation tooling are consumed daily by our Treasury and front office teams and must be accurate auditable and reliable.

This role rewards engineers who combine strong technical fundamentals with genuine understanding of how capital markets firms operate. You should arrive with meaningful exposure to middle or back office workflows trade lifecycles position-keeping reconciliation and the appetite to go deep on systems where correctness is not optional. You will own significant pieces of our infrastructure end-to-end contribute meaningfully to design reviews and work in close partnership with Operations Finance and Treasury counterparts.

You will work alongside senior engineers and a technical team lead with real peer depth around you and clear paths to grow your scope and influence over time.

• Build maintain and improve core middle and back office systems owning specific services or components end-to-end
• Write clean well-tested production-grade code with a strong emphasis on correctness and auditability
• Contribute actively to architecture and design discussions your technical opinions are expected and valued
• Debug and resolve complex data and system issues independently escalating where appropriate
• Use AI-assisted development tooling actively to improve delivery quality and velocity

• Develop and maintain internal books and records systems capturing the full trade lifecycle across asset classes
• Contribute to authoritative position-keeping infrastructure that serves as the firms internal source of truth for Treasury and front office consumers
• Uphold data integrity auditability and consistency across systems where accuracy is paramount

• Build and enhance reconciliation tooling that compares internal trades and positions against prime broker and counterparty statements
• Implement break investigation and resolution workflows that reduce operational burden and surface issues before they reach the business
• Collaborate with Operations and Finance to ensure reconciliation logic reflects real-world business rules and firm-specific accounting treatment

• Partner with Operations Finance and Treasury counterparts to translate business requirements into well-scoped technical solutions
• Participate in design reviews and technical discussions contributing substantively to decisions that affect your area of ownership
• Communicate clearly across technical and business audiences when discussing system behavior tradeoffs or issues

• Working knowledge of middle and/or back office operations at a prop trading firm broker/dealer or similar environment trade capture position management PnL concepts reconciliation or settlement
• Ability to reason about financial data flows: from raw trade feeds through positions PnL attribution and downstream reporting
• Experience working with or alongside Operations Finance or Treasury teams on production systems
• Familiarity with multi-asset class environments is a plus (equities fixed income derivatives listed options)

• 57 years of software development experience with strong C# fundamentals
• Strong SQL skills; comfort designing and querying large structured financial datasets
• Experience building high-correctness auditable systems where data accuracy is paramount
• Demonstrated ownership mentality you see problems through to resolution rather than handing them off at the first hurdle
• Comfortable working independently on ambiguous problems and communicating clearly about progress blockers and tradeoffs

• Work on systems that matter: your output is consumed daily by Treasury and front office teams who depend on its accuracy
• Real end-to-end ownership you wont be handed narrow tasks; youll own meaningful problems across books and records and reconciliation
• Opportunity to build not just maintain we are actively expanding our middle and back office infrastructure
• Strong peer environment with senior technical depth around you and clear paths to grow your scope and influence
• Work in an environment that actively invests in AI tooling and expects engineers to use it

About Susquehanna

Susquehanna is a global quantitative trading firm founded by a group of friends who share a passion for game theory and probabilistic thinking. We have incorporated this approach into our culture where you will find relentless problem solvers within each of our core disciplines: Trading Technology and Quantitative Research. From offices around the world our employees collaborate to make optimal decisions and are driven by the desire to achieve winning results together.

What we do

We are experts in trading essentially all listed financial products and asset classes with a focus on derivatives trading. Through market making and market taking we handle millions of trading transactions around the world every day providing liquidity and ensuring competitive prices for buyers and sellers. While our presence in the market is broad our trading desks are highly specialized allowing for a deep understanding of unique drivers of each asset class.

Susquehanna does not accept unsolicited resumes from recruiters or search firms. Any resume or referral submitted in the absence of a signed agreement will become the property of Susquehanna and no fee will be paid.

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