Citadel Securities Logo

Citadel Securities

Platform Engineer

Posted Yesterday
In-Office
Zürich
Mid level
In-Office
Zürich
Mid level
Design, build, and operate distributed platforms, backend services, APIs, and data systems to support quantitative research, large-scale simulations, AI applications, and analytics. Improve performance, reliability, and scalability while collaborating with researchers to productionize research workflows.
The summary above was generated by AI
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:
  • 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

In accordance with applicable law, the base salary range for this role is $175,000 to $350,000.
In addition, the employee who fills this role will be eligible to participate in a discretionary incentive compensation program, as well as a wide array of benefit programs, such as medical and life insurance, retirement and tax-free savings plans, and access to other healthcare programs.
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 London, England Office

120 London Wall, London, United Kingdom, EC2Y 5ET

Similar Jobs at Citadel Securities

5 Hours Ago
In-Office
London, Greater London, England, GBR
Internship
Internship
Information Technology • Software • Financial Services • Quantitative Trading
As a PhD intern, you'll develop trading strategies, conduct statistical analysis, backtest models, and collaborate with experienced team members in quantitative research.
Top Skills: C++PythonR
5 Hours Ago
In-Office
London, Greater London, England, GBR
Entry level
Entry level
Information Technology • Software • Financial Services • Quantitative Trading
Conduct original research applying machine learning, deep learning, and NLP to extract patterns from large and unstructured datasets; implement and back-test algorithms in high-quality code; document findings and collaborate with trading teams to deploy research-driven models.
Top Skills: AIC++Deep LearningMachine LearningNlpPythonStatistics
5 Hours Ago
In-Office
London, Greater London, England, GBR
Expert/Leader
Expert/Leader
Information Technology • Software • Financial Services • Quantitative Trading
As a Quantitative Researcher, you will develop trading strategies, implement mathematical models, analyze data, and contribute to high-level research in a trading environment.
Top Skills: C++PythonR

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account