Senior C# Developer with Fintech experience

MARGO; United States; Remote; USD 76.000 - 117.000; Vollzeit

Zusammenfassung

MARGO is partnering with a global financial institution to recruit a Senior C# Developer. You will join an international team building core systems for XVA, Liquidity, and Financial Resource Management, migrating to a modern event-driven backend.

The role involves delivering robust back-end services and supporting hundreds of users in a dynamic market environment. You'll work in an agile environment, emphasize clean code and software craftsmanship, and collaborate with front-office IT to drive

Qualifikationen

• Strong OOP, patterns, and design principles.
• Deep experience with .NET C# and the ecosystem.
• Experience with service-oriented architectures.
• Proficient in MS SQL and data access patterns.
• Familiar with DevOps tools and automation.
• Understanding of AI-assisted development in enterprise environments.

Aufgaben

• Develop core systems for XVA, Liquidity, and Financial Resource Management.
• Migrate backend to a modern event-driven architecture.
• Collaborate in an agile team emphasizing clean code and craftsmanship.
• Support hundreds of users in a dynamic market environment.

Kenntnisse

OOP concepts

C# .NET ecosystem

Service-oriented architectures

DevOps tools

AI in software development

Tools

MS SQL

Dapper

Git

TeamCity

Jenkins

Ansible

Rebus

Jobbeschreibung

On behalf of our client – a global financial institution – we are looking for an experienced specialist for the position of Senior C# Developer.

ABOUT THE PROJECT & TEAM:

You will join a distributed, international team responsible for the development of core systems in the areas of XVA, Liquidity, and Financial Resource Management. The project is currently at an exciting turning point – migrating to a modern, highly advanced event-driven architecture on the back-end side. The developed UI tools support the daily operations of hundreds of users in a dynamic market environment. We work in a collaborative, agile environment with a strong emphasis on clean code and software craftsmanship.

170 zł - 190 zł an hour

TECH STACK:

• Language & Frameworks: C# .NET, Windows Services, ASP.NET Web API, SignalR
• Communication: Asynchronous message-driven communication (Rebus)
• Databases & ORM: MS SQL, ORM (Dapper)
• Tools & DevOps: GIT (Bitbucket), TeamCity, Jenkins, Ansible

REQUIRED TECHNICAL COMPETENCIES:

• Deep understanding & experience: OOP, patterns, principles.
• Deep understanding & experience: .NET C# and its ecosystem.
• Deep understanding & experience: service-oriented architectures.
• Deep understanding & experience: MS SQL.
• Demonstrable experience: DevOps tools.
• Understanding of LLM capabilities in software development; practical experience with agentic AI engineering in an enterprise environment.

FUNCTIONAL / FINANCIAL KNOWLEDGE:

Candidates are required to have expertise in at least 2 areas from the following list:

• Financial products (Listed / OTC)
• PnL Explain, risks (Delta, Gamma, Theta, Vega…)
• XVA (CVA, FVA, ColVA…)
• Liquidity Risk (RNFB, NSFR…)
• Cash Forecasting
• Balance Sheet Metrics (Leverage Exposure…)
• Pre-trade calculation and booking workflow

NICE TO HAVE:

• Web development experience: HTML, JavaScript / TypeScript, React, Redux.

CONDUCT & ATTITUDE EXPECTATIONS:

• High autonomy combined with excellent teamwork skills.
• Excellent communication, analytical, and organisational skills.
• Attention to detail (especially under time pressure).
• Proactive, flexible approach to daily engineering challenges.
• Motivation to work directly with front‑office IT.
• Integrity and discipline.
• Role model supporting a culture of good conduct.
• Proactivity, transparency, and accountability in managing conduct risks.
• Considering the impact of decisions on colleagues, partners, and clients; escalation in case of doubts.