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Senior Low Latency Java Engineer

https://www.citi.com/ Logo

Citi

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Location:
United Kingdom, London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

Senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The role provides senior, low-latency systems and application framework engineering within the London Based High Performance Architectures team, specializing in algorithmic trading systems utilities including market data replay and back test/simulation utilities.

Job Responsibility:

  • 90% hands in the Java codebase
  • Build microservices based event sourcing systems on a low latency in-house framework
  • Lead integration of functions to meet goals, deploy new products, and enhance processes
  • Analyse complex business processes, system processes, and industry standards to define and develop solutions
  • Provide world class expertise in area of Java low latency development
  • Consult with end users to identify system function specifications
  • Influence and negotiate with senior leaders and communicate with external parties
  • Work with, educate and support/mentor Junior developers

Requirements:

  • Demonstrated Subject Matter Expert (SME) in Applications Development
  • In-depth experience with Algorithmic Trading application development, preferably in low latency environment
  • Detailed comprehension and experience with Market Data handling and associated technologies
  • Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass
  • Performance assessment and targeted tuning
  • Design and architectural elegance
  • Experience in implementing projects
  • Great communicator with high EQ
  • Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams
  • Relationship and consensus building skills
  • Bachelor's degree/University degree or equivalent experience

Nice to have:

Background in Rust, C++

What we offer:
  • 27 days annual leave (plus bank holidays)
  • Discretional annual performance related bonus
  • Private Medical Care & Life Insurance
  • Employee Assistance Program
  • Pension Plan
  • Paid Parental Leave
  • Special discounts for employees, family, and friends
  • Access to learning and development resources

Additional Information:

Job Posted:
September 16, 2025

Employment Type:
Fulltime
Work Type:
On-site work
Job Link Share:
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