C# Developer - Equity Derivatives Technology Risk (AVP)

Citi; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

27 days annual leave

Discretional annual bonus

Private Medical Care & Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Special discounts for employees

Job summary

Citi in London is seeking a skilled software engineer to join the Equities Technology team. You will contribute to a bold multi‑year transformation, building high‑performance, low-latency financial systems in a global context, with mentorship and hybrid working options.

The role requires strong C#/.Net, unit testing, and experience with scalable platforms. You will collaborate with engineers and product partners across distributed teams, deliver robust solutions, and participate in performance

Qualifications

• Strong C# knowledge with exposure to .Net Framework 4.5.2+ and .Net 5+.
• Experience writing unit tests with frameworks like NUnit, xUnit or Shouldly.
• Familiarity with web technologies OpenAI/Swagger, REST, Authentication, TLS.

Responsibilities

• Develop and maintain Equities platform components within a globally distributed team.
• Collaborate with engineers, business and product partners to deliver scalable, high-performance solutions.
• Perform performance testing and profiling to ensure robustness for high-volume financial data processing.

Skills

C#

Net Framework

Unit testing

OpenAI/Swagger REST

Distributed systems

Tools

Git

GitLab/GitHub

Job description

• Paid Parental Leave

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

What We Do / The Team

Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology estate to achieve world‑leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernised post‑trade, clearing and margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team, you’ll collaborate closely with high‑calibre engineers and deeply engaged business and product partners - working together to define and deliver the next generation of Equities technology at Citi.

Key Skills And Experience Required

We are seeking a highly skilled engineer with broad technical capability along with specialist knowledge of .Net Framework and .Net 5+. You should have good understanding of algorithms, system design/architecture, design patterns, implementation and unit testing. A curious and flexible mindset is a must in this role as to are the following qualities, ownership, perseverance, detail orientated and tenacity.

The ideal candidate will be dependable and resourceful software professional who can comfortably work in a large development team in a globally distributed, dynamic work environment that fosters diversity, teamwork and collaboration.

Proven experience in a developer role with experience on large & complex projects.

Technical / Functional Proficiency:

• Strong C# knowledge in addition to exposure to both .Net Framework 4.5.2+ and .Net 5+
• Understanding of .Net performance analysis and optimization approaches.
• Write comprehensive unit tests utilizing frameworks like NUnit, xUnit, Shouldly, or equivalents.
• Familiarity with web technologies OpenAI/Swagger, REST, Authentication, TLS
• Demonstrable experience or familiarity with high volume, low latency, highly available financial systems, trading platforms, or financial data processing.
• Broad technical experience with exposure to different languages such as Python, Java, Bash as well as operating systems such as Linux. Where candidate does not have deep exposure, they must show some basic knowledge and willingness to grow.
• Experience with version control & CI/CD tools such as Git & GitLab/GitHub
• Understanding of one or more messaging technology such Kafka, RabbitMQ, Solace etc.
• Clear understanding various design patterns and leveraging the same to solve complex technical problems.
• Conduct performance testing and profiling to ensure application robustness and scalability suited for high-volume financial data processing.
• Troubleshoot, diagnose, and resolve code issues and performance bottlenecks.

Added core skills:

• Proven ability in working with the development team members and other partners, with minimal supervision.
• Strong verbal and written communications skills, excellent interpersonal skills with ability to communicate well at all levels.
• Team Player, self-starter and thorough who is willing to take on any assigned job/responsibilities
• Ability to learn new skills quickly with little supervision and ensuring the detail is of high priority
• Efficiently and effectively manages work, time, and resources.
• Ability to work under high-pressure situations and effectively prioritize in a highly dynamic work environment that includes a global focus.
• Strong analytical and problem solving coupled with program execution skills.
• Ability to understand the big picture – can step back and understand the context of problems before applying analytical skills to address the issues.
• Utilize knowledge of applications development procedures and concepts, and basic knowledge of other technical areas to identify and define necessary system enhancements, including using script tools and analyzing/interpreting code
• Has the ability to operate with a limited level of direct supervision.
• Can exercise independence of judgement and autonomy.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What We’ll Provide You

By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A 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 an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.