Hybrid C# AVP, Equities Tech – High-Performance

Citigroup; Greater London; Hybrid; GBP 62,000 - 102,000; Full time

Benefits offered by this job

Discretionary annual bonus

Private medical care

Life insurance

Pension plan

Paid parental leave

Special discounts

Learning and development resources

27 days annual leave

Job summary

Citi in London is seeking an AVP-level software engineer to develop and maintain applications for its Equity Derivatives Technology Risk team. The role covers a multi-year transformation across execution, prime, clearing, and cross-product margining.

You will re-engineer the technology estate to boost performance, resilience, and post-trade processes, collaborating with senior engineers and business partners.

Qualifications

• Strong C# knowledge with exposure to .NET Framework 4.5.2+ and .NET 5+.
• Experience on large and complex projects; performance analysis and optimization.
• Ability to write comprehensive unit tests (NUnit, xUnit, Shouldly).
• Familiarity with OpenAPI/Swagger, REST, authentication, TLS.
• Experience with high-volume financial systems or trading platforms.
• Broad tech exposure: Python, Java, Bash; Linux OS.
• Version control and CI/CD: Git, GitHub/GitLab.
• Messaging: Kafka, RabbitMQ, Solace.
• Strong communication and independent working style.

Responsibilities

• Develop and maintain applications for the Equity Derivatives Technology Risk team.
• Lead part of multi-year transformation across equities platform.
• Improve performance, resiliency, and post-trade processes.
• Collaborate with engineers and partners to deliver next-gen equity tech.
• Conduct performance testing and profiling for high-volume data.
• Troubleshoot and resolve code issues and bottlenecks.
• Use tools to identify system enhancements.
• Take on assigned responsibilities as required.

Skills

C# expertise

.NET familiarity

Algorithms and design

Unit testing

Web tech REST

High-volume finance

Python

Java

Bash

Git CI/CD

Kafka

Linux

Design patterns

Tools

Git

GitHub

GitLab

OpenAPI

Swagger

REST

CI/CD

Kafka

RabbitMQ

Solace

Job description

Citi in London is seeking an AVP-level software engineer to develop and maintain applications for its Equity Derivatives Technology Risk team. The role covers a multi-year transformation across execution, prime, clearing, and cross-product margining.

You will re-engineer the technology estate to boost performance, resilience, and post-trade processes, collaborating with senior engineers and business partners.