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Market Connectivity Engineer - FIX Implementations

Millennium
York, NY Full Time
POSTED ON 12/13/2025 CLOSED ON 5/1/2026

What are the responsibilities and job description for the Market Connectivity Engineer - FIX Implementations position at Millennium?

We are seeking a candidate with strong experience in financial markets technology to join our Market Connectivity team. This global team is responsible for developing and maintaining front-office trading solutions,

collaborating with brokers, exchanges, ECNs, and third-party platforms across all asset classes and regions.

Principal Responsibilities

In this role, the candidates primary focus will be on onboarding external trading teams, ensuring seamless integration of third-party trading systems with the Millennium eco-system.

Qualifications/Skills Required

  • Bachelor’s degree in Computer Science or a related field.
  • 5 years Java programming with multi-threading development experience.
  • C development is a plus.
  • A solid understanding of object-oriented programming is required.
  • 3 years of financial institution experience required.
  • Strong FIX protocol knowledge is required, FIX 4.2 – FIX 5.0.
  • Knowledge of binary trading protocols is a plus.
  • Must have excellent written and verbal communications skills.
  • Extensive Linux development experience required.
  • Must have a strong understanding of market structure for equities, futures, options and FX products.
  • Must have a working knowledge of networking protocols - TCP/IP & multicast.
  • Must be able to troubleshoot production issues (Level "3" support).

The estimated base salary range for this position is $160,000 to $250,000, which is specific to New York and may change in the future. Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. When finalizing an offer, we take into consideration an individual’s experience level and the qualifications they bring to the role to formulate a competitive total compensation package.

Salary : $160,000 - $250,000

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