Senior Application Support Engineer

SkillSource; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

SkillSource seeks a Senior Application Support Engineer to maintain stability of a mission-critical financial technology platform in our US office. You will lead production incidents, troubleshoot FIX/API/file-based integrations, and collaborate with Engineering, Product, and Operations while coordinating with UK colleagues.

Our platform runs on Google Cloud Platform (GCP) and touches trading, settlement, books/records, and operational processing.

Qualifications

• 8+ years in production/application support for live systems.
• Experience with financial services platforms and mission-critical applications.
• Ability to diagnose and resolve complex incidents independently.
• Strong communication and collaboration with technical and non-technical stakeholders.
• Experience working across distributed teams and multiple time zones.

Responsibilities

• Own production incidents from investigation through resolution.
• Troubleshoot failures across services, FIX, APIs, and file-based feeds.
• Apply mitigations with assessment of downstream impacts.
• Monitor production apps, integrations, and scheduled jobs.
• Provide technical support to local teams and clients as needed.
• Maintain runbooks, incident records, and cross-time-zone handovers.
• Support releases and post-deployment validation and recovery scenarios.
• Improve monitoring/automation to reduce recurring issues; support audits.

Skills

8+ years of experience in application/

Experience supporting financials/fin.—

Strong communication & collaboration

Diagnosing incidents under pressure

Distributed teams across time zones

Tools

Datadog

Logs Explorer

Google Cloud Platform (GCP)

FIX Protocol

APIs & messaging systems

Python scripting

Release management

Job description

Reports to: Head of Engineering (UK) and Head of US Office

About the Role

We’re seeking an experienced Senior Application Support Engineer to help maintain the stability, reliability, and business continuity of a mission-critical financial technology platform.

As the primary technical contact in our US office, you’ll work closely with Application Support, Engineering, Product, and Operations teams while sharing support coverage with colleagues in the UK.

Our platform runs on Google Cloud Platform (GCP) and connects applications supporting trading, clearing, settlement, books and records, and operational processing.

What You’ll Do

• Own production incidents from investigation through resolution, prioritizing business impact, coordinating incident calls, and working with internal teams and external providers.
• Troubleshoot application and integration failures across services, FIX connections, APIs, and file-based feeds, including reconciliation breaks and processing exceptions.
• Apply safe mitigations and controlled remediation, assessing downstream impacts before restarting services, replaying messages, or reprocessing files.
• Monitor production applications, integrations, and scheduled jobs, including critical market-hours, start-of-day, and end-of-day processing.
• Provide technical support to local teams and participate in client and partner discussions as needed.
• Maintain technical documentation, runbooks, incident records, and clear handovers across time zones.
• Support software releases and integration testing, including readiness checks, post-deployment validation, and recovery scenarios.
• Improve monitoring, alerting, and automation to reduce recurring production issues.Support audit and compliance requests involving application behavior, data flows, and operational controls.

What You’ll Bring

• 8+ years of experience in application support, production support, or technical operations supporting live systems.
• Experience supporting business-critical, interconnected applications, such as trading platforms or payment systems, where availability, accuracy, and timely processing are essential.
• Previous experience in financial services, investment management, or investment advisory environments.
• Demonstrated ability to independently diagnose and resolve complex production incidents under pressure.
• Strong communication and collaboration skills, including working with technical and non-technical stakeholders during incidents.
• Experience sharing support responsibilities across geographically distributed teams and time zones.

Required Technical Skills

• SQL: Strong proficiency in investigating data issues, validating system state, and supporting controlled remediation.
• Google Cloud Platform: Hands-on experience supporting cloud-hosted applications using Logs Explorer, Trace, and monitoring platforms such as Datadog.
• FIX Protocol: Practical knowledge of FIX sessions and order/execution messages, including sequence gaps, rejects, reconnects, and recovery procedures.
• Distributed Systems: Ability to troubleshoot applications, APIs, messaging systems, and file-based integrations, including delayed, missing, duplicated, or out-of-order processing.
• Networking and Security: Working knowledge of authentication, networking, and secure file transfer protocols.
• Scripting: Ability to write scripts to automate operational checks and streamline investigations; Python preferred.
• Release Management: Understanding of production access controls, change management, deployment environments, release validation, and rollback procedures.

Preferred Qualifications

• Familiarity with investment platforms, brokerage environments, or self-clearing broker-dealer operations.
• Knowledge of financial instruments, including equities, bonds, and mutual funds.
• Experience supporting applications integrated with clearing and settlement infrastructure, including DTCC.
• Experience with Order Management Systems (OMS) and books and records platforms.
• Knowledge of client onboarding, Know Your Customer (KYC), and Anti-Money Laundering (AML) operations.
• Experience supporting regulatory reporting processes.
• Familiarity with GCP infrastructure and containerization technologies, including Compute Engine virtual machines, Managed Instance Groups (MIGs), Cloud Run, Pub/Sub, and Docker.

What Success Looks Like

You’re a hands-on support professional who takes ownership of complex incidents and brings sound judgment, attention to detail, and clear communication to critical situations. You combine technical troubleshooting skills with an understanding of financial services operations and proactively improve production stability and operational efficiency.