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Citi Logo Citi · IT - Software Development

Senior Python Application Developer

United States, New York Employment contract 176720.00 - 265080.00 USD / Year · Job Posted June 16, 2026
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Job Description

We are seeking a highly experienced and technically proficient Senior Python Application Developer with 12+ years of hands-on experience to design, develop, and deliver critical, scalable, highly available, and performant applications. This role demands deep technical expertise, a strong focus on execution, and a proven ability to deliver robust software solutions, particularly within quantitative and market risk domains.

Job Responsibility

  • Lead hands-on implementation and architecture of Python frameworks for scalable, resilient, and performant applications
  • Develop solutions adhering to architectural standards, utilizing in-depth technical and business domain knowledge
  • Enforce industry-standard SDLC best practices and contribute to code quality through reviews
  • Collaborate with cross-functional teams (Risk, Quants, FO, DevOps, Production Support) for seamless delivery
  • Drive development for Stress Testing and Regulatory Risk projects in the Market Risk domain
  • Manage project technical aspects, including planning, governance, and taking ownership of initiatives
  • Deliver high-quality solutions independently within a globally matrixed environment and under tight deadlines

Requirements

  • 10+ years of hands-on experience in Application Development, primarily with Python
  • Expert-level Python 3.x proficiency for scalable, resilient, and high-performance applications
  • Advanced knowledge of Python frameworks (FastAPI, Django, Flask), best practices, and design patterns (OOP)
  • Strong understanding of software architecture principles and distributed system design (Microservices, Event-Driven Architecture)
  • Extensive experience with relational (PostgreSQL, Oracle, SQL Server) and NoSQL databases (MongoDB, Cassandra, Redis), including advanced SQL
  • Proven expertise in designing, developing, and securing RESTful APIs and integration patterns
  • Hands-on experience with CI/CD systems (Jenkins, GitLab CI, GitHub Actions, Bitbucket Pipelines) for automated deployment
  • Highly experienced with Unix-based operating systems
  • Strong background in cloud platforms (AWS, Azure, GCP), including containerization (Docker) and contributing to Kubernetes orchestration
  • Advanced troubleshooting, debugging, and performance optimization for distributed systems
  • Proficiency in automated testing frameworks (Pytest, unittest) and TDD methodologies
  • Solid understanding of secure coding practices and application security principles (OWASP Top 10)
  • Expertise in Git (Bitbucket, GitHub) for advanced branching and pull request workflows
  • Experience developing Quantitative/Calc-intensive Python solutions with advanced computation libraries
  • Sound understanding and exposure to various Risk Methodologies
  • Exposure to mathematical modeling/finance insights
  • Exposure to AI/ML tools and frameworks (TensorFlow, PyTorch, scikit-learn)
  • Practical experience with AI tools (Copilot, Devin, Claude/Gemini/GPT) for development workflows
  • Experience with Agentic AI tools, including writing Agents and Skills, and contributing to Agentic frameworks
  • Understanding and practical application of Generative AI concepts in software development
  • Deep understanding and practical experience with Agile/Scrum methodologies
  • Exceptional ability to manage priorities and tasks effectively
  • Strong analytical, logical, systems thinking, and critical analysis skills
  • Excellent written and verbal communication for diverse audiences
  • Ability to work independently, take ownership, and collaborate effectively in global teams
  • 10+ years of relevant experience
  • Experience in implementing projects
  • Experience in systems analysis and programming of software applications
  • Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development
  • Demonstrated knowledge of client core business functions
  • Demonstrated leadership, project management, and development skills
  • Relationship and consensus building skills
  • Bachelor's degree/University degree or equivalent experience
  • Polyglot Programming Exposure (e.g., Java)
  • Big Data Technologies (Apache Spark, Hadoop, Kafka) and data warehousing
  • Frontend Development (React, Angular, Vue.js)
  • Relevant Cloud or Industry Certifications
  • Experience with banking domain (pricing, risk), CFA/FRM certification
  • Master's degree preferred

Nice to have

  • Polyglot Programming Exposure (e.g., Java)
  • Big Data Technologies (Apache Spark, Hadoop, Kafka) and data warehousing
  • Frontend Development (React, Angular, Vue.js)
  • Relevant Cloud or Industry Certifications
  • Experience with banking domain (pricing, risk), CFA/FRM certification
  • Master's degree

What we offer

  • medical, dental & vision coverage
  • 401(k)
  • life, accident, and disability insurance
  • wellness programs
  • paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays
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