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Salary
$80k – $115k per year
Location
Hybrid (Mississauga, Canada)
Seniority
Architect · 3+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 22, 2026. First seen by Alion on Oct 13, 2026. Citi scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Citi is one of the largest banks in the world, tracing its lineage to the City Bank of New York founded in 1812 and taking its modern shape through the 1998 merger that created Citigroup. Its most distinctive asset is a cross-border payments and treasury network unmatched by any competitor, moving trillions of dollars a day for multinational corporations, governments and other banks across roughly ninety countries. Alongside that institutional franchise it runs markets and investment banking, wealth management and a United States personal bank, and has spent recent years simplifying itself by exiting consumer operations across Asia, Europe and Latin America.

QRL (Quant Risk Libraries) implements risk models to ensure that the bank’s lending portfolios have adequate capital during crisis. We use mathematical modeling and the latest technologies to build loss forecasting and stress testing pipelines. Our systems are responsible for calculating risk on some of the largest portfolios in Citi.

We are a diverse group of professionals with backgrounds in Physics, Engineering and Computer Science. You will work alongside experienced colleagues to further develop your analytical and quantitative skills. You will build skills in building products from the ground up for solving real life problems and develop a career as a risk model expert.

You will be responsible for:

  • Designing and implement a framework for model driven computations on a graph
  • Designing and building infrastructure APIs for grid computing, data storage and access
  • Unit testing, reliability and improving the quality of our compute pipelines
  • Learn about Python, its ecosystem, community and best practices
  • Ideas on improving our model and data platform and help implement them

You will need:

  • Bachelors, Masters or Ph.D. in Computer Science/Computer Engineering or related field
  • At least 3-5 years of professional Software Development experience
  • 2+ years developing Python, C or C++ packages and API development
  • Strong grasp of computing fundamentals: data structures, algorithms, OS, programming languages.
  • Fluency in Python and working knowledge of a compiled language like C/C++/Java
  • Exposure to Numerical libraries (Pandas/Numpy) and data processing
  • Ability for abstraction and conceptualization, reasoning about program behavior at different levels of abstraction from hardware to applications.

Nice to have:

  • Experience with web services and Flask/Django ecosystem
  • Experience with large scale scientific computing and algorithm development
  • Long term interest in finance, financial experience is not a requirement.
  • Experience contributing to Open-Source projects

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Job Family Group:

Risk Management

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Job Family:

Model Development and Analytics

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Time Type:

Full time

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Primary Location Full Time Salary Range:

$111,600.00 - $161,600.00

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Most Relevant Skills

Analytical Thinking, Credible Challenge, Data Analysis, Governance, Policy, Procedure, and Regulation, Risk Management Lifecycle.

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Other Relevant Skills

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

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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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.

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