Application Support Engineer

Application Support Engineer QUANTITY (3) Application Support Engineer Exchange Operations Shift: Rotational (24/7 coverage including nights and weekends) -5 Days working About the Role We are looking for a skilled Application Support Engineer to join our Exchange Operations team supporting Nadex, a regulated derivatives trading exchange. You will play a critical role in ensuring the availability, stability, and performance of our production and demo trading environments. This is a hands-on role suited for someone who thrives in a fast-paced, mission-critical environment and takes ownership of operational excellence. Key Responsibilities Production Support & Monitoring — Provide expert-level remote management, administration, and support for Production and Demo trading exchange environments, ensuring system availability and application stability. Daily Operations — Execute and monitor daily operational processing, including contract scheduling, settlement of expired contracts, and end-of-day/start-of-day procedures. Incident & Problem Management — Triage, troubleshoot, and drive resolution of production incidents. Follow defined escalation procedures and contribute to root cause analysis and post-incident reviews. Performance Tuning — Monitor application and system performance, identify bottlenecks, and implement tuning recommendations to maintain optimal exchange operations. Change & Release Support — Assist with version upgrades, deployments, and release validation in coordination with Development and QA teams. Shift Handover & Documentation — Maintain and update runbooks, SOPs, and operational documentation. Ensure seamless shift handovers with clear status communication. Process Improvement & Automation — Participate in the investigation, implementation, and operation of tools and scripts to automate, streamline, and continuously improve operational workflows. Collaboration — Work closely with Development, QA, Infrastructure, and partner teams to resolve cross-functional issues and support business-critical initiatives. Required Qualifications 5+ years of experience managing or supporting mission-critical production software applications. Strong working knowledge of Linux server operating systems . Proficiency in scripting and automation — Bash and/or Python. Hands-on experience with SQL and relational databases. Demonstrated incident management and technical troubleshooting skills. Solid understanding of escalation procedures and SLA-driven environments . Excellent interpersonal, verbal, and written communication skills. Strong attention to detail and a proactive, ownership-driven mindset. Willingness to work in a 24/7 rotational shift model , including nights and weekends. Preferred Qualifications Background in financial services, fintech, or regulated exchange environments . Knowledge or experience of options and futures trading markets . Experience with FIX protocol and trading system applications. Familiarity with monitoring and observability tools — Grafana, Zabbix, Splunk, Logic Monitor . Experience with messaging and middleware systems — Kafka, AMQ, Tomcat. Working knowledge of high availability systems and clusters . Hands-on experience with AWS (EC2, CloudWatch, S3, etc.). Experience with change and release management processes. Exposure to SFTP / file transfer workflows and monitoring.