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Market Connectivity Developer - Trading

Millennium
York, NY Full Time
POSTED ON 7/7/2026
AVAILABLE BEFORE 1/2/2027
Market Connectivity Developer - Trading 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 ensuring seamless integration of third-party trading systems with the Millennium eco-system. Other projects will involve building connectivity with brokers, exchanges and alternative trading venues. Qualifications / Skills Required * 5 years of Java development experience, including multithreaded systems. * 3 years of experience in a financial institution or capital markets environment. * Strong experience with the FIX protocol, including FIX 4.2 to FIX 5.0. * Experience with C development. * Extensive Linux development experience. * Strong understanding of object-oriented programming. * Working knowledge of networking protocols, including TCP/IP, UDP, and multicast. * Strong understanding of market structure across equities, futures, options, and FX. * Experience using AI coding assistants and engineering tools to support code generation, refactoring, documentation, debugging, and developer productivity. * Experience developing and maintaining automated test frameworks for unit, integration, regression, performance, latency, and protocol conformance testing. * Ability to apply AI tools for test case generation, log analysis, anomaly detection, root cause analysis, and production incident review. * Ability to troubleshoot production issues in a Level 3 support environment. * Excellent written and verbal communication skills. * Bachelor’s degree in Computer Science or a related field. * Knowledge of binary trading protocols. 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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