
Senior C++ and Python Developer
- Job Req Id:
- 25899289
- Location(s):
- Mississauga, Ontario, Canada
- Job Type:
- Hybrid
- Posted:
- Sep. 05, 2025
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Job Overview
The Senior C++ and Python Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis and programming activities.
Responsibilities:
- Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
- Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
- Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
- Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
- Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
- Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
- Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
- Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.
Skillset:
- Extensive practical experience working with most if not all the technologies listed below.
- Primary skill: C++ development with hands-on experience with Object Oriented Programming including Design Patterns.
- Strong Knowledge in Socket programing, Stream/Batch processing, API Development, Multi-threading
- Supplemental Skill: Expert in Python 3.x, Strong in multi-process, multi-threaded, and async application design (multiprocessing, threading, asyncio).
- Experience with high-performance data processing using NumPy, Pandas, and vectorized operations.
- Skilled in Flask, FastAPI, or Django for production-grade services.
- Knowledge on Test Driven Development
- Familiarity with Linux environment including scripting skills
- Cloud-native deployment (Docker, Kubernetes, AWS/GCP/Azure).
- SDLC/Dev Ops - Git/BitBucket, CI/CD pipeline frameworks such as Jenkins, SonarQube, JIRA, Any secure coding toolkits
Knowledge & Experience:
- Proven engineering experience building robust, scalable and maintainable applications. Ideally 8+ years of application development experience.
- 8+ years of hands-on experience in C++ development in Linux environment
- 3+ Experience in Python 3.x development
- Expert knowledge of industry best practices and standards.
- Experience re-engineering large monolithic applications to microservices
- Experience working in Containerization Platform Openshift/Kubernetes, Hybrid cloud, Messaging and Event Streaming Platform like Kafka, Solae or RabbitMQ
- Experience in any NoSQL DB Preferably MongoDB
- Knowledge of distributed cache like Apache Ignite or Hazlecast etc.
- Experience re-engineering complex monolith applications to microservices.
- Experience with Credit/Market Risk is a significant advantage.
- Experience in managing and implementing successful projects
- Subject Matter Expert (SME) in at least one area of Applications Development
- Ability to adjust priorities quickly as circumstances dictate
- Demonstrated leadership and project management skills
- Consistently demonstrates clear and concise written and verbal communication
Education:
- Bachelor’s degree/University degree or equivalent experience
- Master’s degree preferred
------------------------------------------------------
Job Family Group:
Technology------------------------------------------------------
Job Family:
Applications Development------------------------------------------------------
Time Type:
Full time------------------------------------------------------
Primary Location Full Time Salary Range:
$0.00 - $0.00------------------------------------------------------
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.

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