Production Support Application & Middleware Engineer

Location: New York, New York, United States of America

Department: Information Technology

Production Support Application & Middleware Engineer

About Millennium
Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team
Core to the health and growth of Millennium’s business, the Information Technology department enables the firm’s active, multi-manager business model through flexible, scalable technology and advanced proprietary systems. The team develops and supports the next generation of analytical, trading, integration, and enterprise capabilities in a global engineering environment.

What You'll Do

• Provide production support for critical internal trading, integration, and event-driven messaging platforms across user-acceptance and production environments.
• Diagnose and resolve application, messaging, infrastructure, connectivity, latency, throughput, and data-delivery issues; coordinate escalations with subject-matter experts and external vendors as needed.
• Communicate clearly and promptly with trading staff and internal stakeholders during incidents, platform disruptions, releases, and exchange-related events.
• Partner with global teams across North America, Europe, and APAC to deliver seamless production support coverage and coordinate incident, problem, change, and release-management activities.
• Monitor platform health, identify emerging risks, and strengthen operational readiness through dashboards, alerting, capacity planning, runbooks, post-incident reviews, and root-cause analysis.
• Design, implement, administer, and support Solace PubSub+ event-driven integration solutions, including event brokers, message VPNs, client profiles, queues, subscriptions, ACLs, certificates, authentication, authorization, and monitoring.
• Establish and maintain event-driven architecture standards for topics, schemas, versioning, security, retention, resiliency, and lifecycle management; use Solace Event Portal and AsyncAPI-based practices to govern reusable event contracts.
• Develop source-controlled automation, configuration, and operational tooling using Python, shell scripting, GitHub, Artifactory, CI/CD pipelines, and infrastructure-as-code practices to improve reliability, observability, deployment, and recovery procedures.

What You Bring
• Experience supporting business-critical production systems in a fast-paced environment, ideally within financial services, trading technology, or another highly available enterprise setting.
• Hands-on experience with Solace PubSub+, including broker configuration, queues, topics, subscriptions, ACLs, client connectivity, routing, and operational support.
• Strong knowledge of event-driven architecture, asynchronous messaging, distributed systems, and integration patterns, including one or more of JMS, AMQP, MQTT, REST, WebSocket, or SMF.
• Strong Linux skills, including command-line troubleshooting, log analysis, process management, networking fundamentals, and shell scripting.
• Strong Python and shell scripting skills, with experience automating platform operations, environment management, configuration, deployment, monitoring, validation, or recovery.
• Experience with GitHub and Git-based workflows, including pull requests, branching strategies, CI/CD practices, and artifact repositories such as Artifactory.
• Demonstrated ability to troubleshoot complex incidents across application, messaging, infrastructure, and network layers, while communicating effectively with technical teams, business stakeholders, and trading staff.
• Bachelor’s degree in Computer Science or a related field.

Salary Range
Millennium offers a total compensation package which includes a base salary, discretionary performance bonus, and comprehensive benefits. The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York City and may change in the future. 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.