Design and operate distributed platforms, data systems, backend services, APIs, and SDKs supporting quantitative research, simulations, AI applications, and large-scale analytics. Build scalable ingestion, transformation, storage, and lifecycle-management systems; improve performance and reliability; and collaborate with researchers and engineers to deliver production-ready infrastructure.
Job Description
Role Overview:
Citadel Securities is seeking an exceptional Platform Engineer to join our Research Platform Engineering team in Miami, Zurich or New York. Our Research Platform teams are at the forefront of designing and developing the distributed systems, data platforms, and research infrastructure that power large-scale simulations, analytics, and model development across the firm. These systems are critical in allowing researchers to transform data into actionable insights and alpha-generating trading strategies.
Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.
Responsibilities:
Qualifications:
About Citadel Securities
Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market's and our clients' most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com .
Role Overview:
Citadel Securities is seeking an exceptional Platform Engineer to join our Research Platform Engineering team in Miami, Zurich or New York. Our Research Platform teams are at the forefront of designing and developing the distributed systems, data platforms, and research infrastructure that power large-scale simulations, analytics, and model development across the firm. These systems are critical in allowing researchers to transform data into actionable insights and alpha-generating trading strategies.
Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.
Responsibilities:
- Design and build distributed platforms and services that support quantitative research, simulations, AI-powered applications, and large-scale analytics workflows
- Develop scalable platform services and data systems for ingestion, transformation, storage, and lifecycle management of large datasets
- Build and maintain backend services, APIs, and SDKs that improve researcher productivity and self-service capabilities
- Improve performance, reliability, and scalability of critical research systems operating in high-throughput environments
- Collaborate closely with researchers and engineers to translate research requirements into production-read systems
Qualifications:
- Bachelor's degree in Computer Science or a related field
- 3+ years of professional software engineering experience
- Strong programming skills in Python, Go, or C++, or similar systems-oriented languages
- Experience building and operating distributed systems in production environments
- Experience designing scalable backend services, APIs, and data-intensive applications
- Strong understanding of distributed systems, data-intensive applications, and system design fundamentals
- Experience with cloud platforms (AWS, GCP, Azure) and modern infrastructure technologies
- Experience with technologies such as Kafka, Kubernetes, Spark, Airflow, distributed databases, or similar systems is a plus
About Citadel Securities
Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market's and our clients' most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com .
Citadel Securities New York, New York, USA Office

425 Park Avenue, New York, NY, United States, 10022
Similar Jobs at Citadel Securities
Information Technology • Software • Financial Services • Quantitative Trading
Conduct quantitative research for automated trading strategies by developing mathematical models, translating algorithms into code, backtesting trading signals, analyzing unconventional data, and refining monetization systems. Collaborate with senior researchers during an 11-week post-doctoral internship while applying advanced probability, statistics, machine learning, and time-series techniques to financial markets.
Top Skills:
C++Machine LearningNatural Language Processing (Nlp)Pattern RecognitionPythonRTime-Series Analysis
Information Technology • Software • Financial Services • Quantitative Trading
The Market Data Engineer will design and implement high-performance market data systems, focusing on trading infrastructure, performance optimization, and system resiliency.
Top Skills:
C++ImpactItchOuchPitch
Information Technology • Software • Financial Services • Quantitative Trading
Recruiting Coordinators support full-cycle recruitment processes, manage candidate interactions, and work on HR projects, all while building stakeholder relationships.
Top Skills:
Microsoft Outlook
What you need to know about the NYC Tech Scene
As the undisputed financial capital of the world, New York City is an epicenter of startup funding activity. The city has a thriving fintech scene and is a major player in verticals ranging from AI to biotech, cybersecurity and digital media. It also has universities like NYU, Columbia and Cornell Tech attracting students and researchers from across the globe, providing the ecosystem with a constant influx of world-class talent. And its East Coast location and three international airports make it a perfect spot for European companies establishing a foothold in the United States.
Key Facts About NYC Tech
- Number of Tech Workers: 549,200; 6% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Capgemini, Bloomberg, IBM, Spotify
- Key Industries: Artificial intelligence, Fintech
- Funding Landscape: $25.5 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Greycroft, Thrive Capital, Union Square Ventures, FirstMark Capital, Tiger Global Management, Tribeca Venture Partners, Insight Partners, Two Sigma Ventures
- Research Centers and Universities: Columbia University, New York University, Fordham University, CUNY, AI Now Institute, Flatiron Institute, C.N. Yang Institute for Theoretical Physics, NASA Space Radiation Laboratory


