C-Sharp Jobs Senior Backend Developer (C#)

Senior Backend Developer (C#)

Galaxy

Global leader in digital assets and data center infrastructure.

About the Company

Galaxy is a global leader in digital assets and data center infrastructure, providing solutions that advance finance and artificial intelligence. The company’s institutional digital asset platform spans trading, asset management, staking, self-custody, and tokenization technology. Galaxy also operates cutting-edge data centers to power AI and high-performance computing. Headquartered in New York City, Galaxy has offices across North America, Europe, the Middle East, and Asia, blending crypto expertise with institutional experience to shape the future of Web3 and AI.

About the Role

The Senior Back-End Developer will design, develop, and optimize scalable back-end systems for web and mobile applications supporting a new business initiative. This role ensures platform reliability, security, and high performance, while collaborating closely with front-end, product, and infrastructure teams. The position is fully remote, requiring candidates to work within the Eastern or Central U.S. time zones.

Responsibilities

  • Design, develop, and maintain high-performance back-end systems, APIs, and databases.
  • Collaborate with front-end developers, product managers, and DevOps teams to deliver integrated features and services.
  • Architect scalable, secure, and efficient server-side solutions for high transaction volumes.
  • Implement best practices for code quality, automated testing, and deployment, including code reviews.
  • Mentor peers and promote a culture of technical excellence and continuous learning.
  • Stay informed on emerging back-end technologies, blockchain, and fintech trends to recommend innovative improvements.

Required Skills

  • 7+ years of professional back-end development experience.
  • Proficiency in C# and .NET development.
  • Strong understanding of OOP, design patterns, and software engineering principles.
  • Experience with SQL databases and database optimization.
  • Familiarity with caching and messaging systems such as Redis, SQS, or Kafka.
  • Knowledge of web APIs and API integration.
  • Strong communication skills and ability to work collaboratively in teams.
  • Experience with AWS cloud services.

Preferred Qualifications

  • Exposure to financial markets, brokerages, crypto, or mortgage technologies.
  • Prior experience contributing to fintech or high-performance computing platforms.

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