Job Specifications
Full Stack Developer (C#/.NET) – Low Latency Trading/Treasury Systems
Location: Stamford, CT / Midtown Manhattan, NY
Experience: 8–10 years overall | 5–7 years low-latency backend in trading/treasury/OMS
Role Overview
We are seeking an experienced Full Stack Developer with strong C#/.NET skills and proven experience building low-latency backend services within hedge fund or asset management environments. This role supports mission-critical treasury and trading workflows, including order management and post-trade operational processes, where performance, reliability, and accuracy are essential.
Key Responsibilities
Design, build, and support low-latency backend services in C#/.NET for trading, treasury, and/or order management systems.
Develop robust APIs and service integrations to support real-time processing and high-throughput workflows.
Apply object-oriented design principles and engineering best practices (e.g., SOLID, clean code, unit/integration testing).
Collaborate with business stakeholders (Treasury, Operations, Accounting, or Compliance) to translate requirements into well-engineered solutions.
Troubleshoot production issues, perform root-cause analysis, and implement sustainable fixes with a focus on stability and performance.
Participate in code reviews and contribute to standards for maintainability, observability, and operational excellence.
Contribute to full stack delivery as needed; support UI development and enhancements (Blazor/DevExpress exposure is a plus).
Required Qualifications
8–10 years of professional software development experience, with a strong emphasis on C#/.NET.
5–7 years of hands-on experience developing low-latency backend services supporting trading systems, treasury systems, and/or order management systems (OMS).
Deep knowledge of object-oriented programming and design patterns; ability to write high-quality, production-grade code.
Experience delivering and supporting services in performance-sensitive environments (e.g., real-time or near real-time processing).
Strong understanding of software development lifecycle, version control, testing practices, and release management.
Ability to communicate effectively with both technical teams and business stakeholders.
Business Domain Experience (One Required)
Candidates must have meaningful exposure within a hedge fund or asset manager to at least one of the following functional areas:
Treasury
Margin and collateral workflows
Financing costs and funding analysis
Optimization initiatives and liquidity efficiency
Securities borrowing/locates and related processes
Operations
Post-trade reconciliations and breaks management
Affirmations/confirmations support
Break resolutions and dispute processes
Allocations and downstream operational workflows (excluding trader/PM financing)
Accounting
Accounting integrations and data flows
Valuations and accounting controls support
Financial close support workflows (as applicable)
Compliance
Compliance monitoring and controls support
Trade/communications surveillance integrations (as applicable)
Auditability, reporting, and control frameworks
Technical Skills
C#/.NET – advanced proficiency
Backend services design – RESTful APIs, messaging/event-driven patterns, and service integration
Performance tuning – profiling, latency reduction, and efficient data handling
Nice to Have
Blazor development experience
DevExpress UI components experience
Exposure to front-end development within a .NET ecosystem
Competencies
Strong analytical skills and attention to detail; comfortable working with complex workflows and data.
Ownership mindset—able to drive work independently while collaborating effectively across teams.
Calm and methodical under pressure when supporting production systems.
Education
Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience).
Note: This position requires prior experience within hedge funds or asset managers in the domain areas listed above.
About the Company
The Aptonet brand includes the professional services and the resources divisions. The professional services group delivers pure technology execution such as architecture, development, implementation, integration and support; delivers specialized operations research services, IoT solutions, mobility and web solutions. This group has North American and European reach. The development and support work can be done locally or near shore as an alternative.
The resources division does the global IT staffing and recruitment. This gr...
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