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Citadel Securities · 14 hours ago

Senior Platform Infrastructure Engineer

New York, NY

Full-time

Onsite

Senior Level

$175K/yr - $350K/yr

5+ years exp

Citadel Securities is a leading global market maker seeking a Senior Platform Infrastructure Engineer to join their Platform Engineering team in New York. This role involves designing and developing core infrastructure components to support high frequency trading systems, ensuring optimal performance and reliability across distributed applications.

BankingFinanceFinancial Services

Growth Opportunities

Responsibilities

Design, develop, and maintain critical infrastructure software (notably components like process scheduler, configuration and deployment managements system and process state observability systems)

Collaborate with SREs and production teams worldwide to continuously evolve the deployment, configuration, and management tools for trading applications

Troubleshoot, diagnose, and resolve complex issues across distributed trading systems to ensure optimal performance and stability

Author and maintain comprehensive unit and integration tests to ensure high-quality, reliable code

Contribute to and improve SDLC processes by leveraging industry-standard tools (e.g., Jira, Git, Jenkins, Bazel), with flexibility to adapt to evolving technology stacks

Document solutions and processes to enable firmwide adoption and ensure knowledge transfer across teams

Qualification

C++ programmingPython programmingLinux systemsDistributed systemsSDLCToolingJob scheduling toolsLinux internalsSecurity protocolsNetworking fundamentalsCloud infrastructure

Required

Minimum 5 years of commercial experience with each of the following:

Advanced C++ and Python programming, including production-level development

Writing maintainable unit and integration tests

Linux systems as a daily user (strong proficiency in building, deploying, configuring, and troubleshooting)

Hands-on experience with distributed systems in production environments

SDLC and tooling (such as Jira, Git, Bazel, Jenkins, or equivalent alternatives)

Preferred

Job scheduling and orchestration tools (e.g., Slurm, Airflow), especially at a developer level

Deep familiarity with Linux internals and tooling (systemd, cgroups, FUSE, etc.)

Security protocols relevant to infrastructure (TLS, Kerberos, Active Directory, etc.)

Networking fundamentals (HTTP, DNS, multicast, TCP/UDP, etc.)

Cloud infrastructure management, infrastructure-as-code (Terraform)

Company

Citadel Securities

Glassdoor4.1

Citadel Securities is a next-generation capital markets firm delivering critical liquidity and helping to shape the markets of tomorrow. It is a sub-organization of Citadel.

Founded in 2002

Miami, Florida, USA

1001-5000 employees