{"id":2220125,"url":"https://alion.io/job/citi-senior-python-engineer-3","title":"Senior Python Engineer","company":{"id":7841,"name":"Citi","domain":"citi.com","url":"https://alion.io/company/citi","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":100,"open_postings":352,"ghost_share":0.009,"stale_share":0.003,"repost_share":0.097,"time_to_fill_p50_days":10,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Mississauga, Canada"],"countries":["CA"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":120800,"max":170800,"currency":"CAD","period":"year","gross":null,"usd_annual":119671},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"Bitbucket","optional":false},{"name":"Cassandra","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude","optional":false},{"name":"Copilot","optional":false},{"name":"Devin","optional":false},{"name":"Django","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Flask","optional":false},{"name":"GCP","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"GitHub Actions","optional":false},{"name":"GitLab CI","optional":false},{"name":"Jenkins","optional":false},{"name":"Kubernetes","optional":false},{"name":"OWASP Top 10","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"Redis","optional":false},{"name":"Scikit-learn","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false},{"name":"TensorFlow","optional":false},{"name":"Unix","optional":false},{"name":"Angular","optional":true},{"name":"Apache Kafka","optional":true},{"name":"Fine-tuning","optional":true},{"name":"Hadoop","optional":true},{"name":"Hugging Face","optional":true},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"LangChain","optional":true},{"name":"LangGraph","optional":true},{"name":"Llama","optional":true},{"name":"LlamaIndex","optional":true},{"name":"Machine Learning","optional":true},{"name":"Multi-Agent Systems","optional":true},{"name":"OpenAI","optional":true},{"name":"Prompt Engineering","optional":true},{"name":"RAG","optional":true},{"name":"React.js","optional":true},{"name":"Spark","optional":true},{"name":"TypeScript","optional":true},{"name":"Vue.js","optional":true}],"status":"live","first_seen_at":"2026-10-09T00:00:00Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-11T04:23:58Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Job Description\nWe are seeking a highly experienced and technically proficient Senior Python Developer with 6+ 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.\nKey Technical Responsibilities:\nLead hands-on implementation and architecture of Python frameworks for scalable, resilient, and performant applications.\nDevelop solutions adhering to architectural standards, utilizing in-depth technical and business domain knowledge.\nEnforce industry-standard SDLC best practices and contribute to code quality through reviews.\nCollaborate with cross-functional teams (Risk, Quants, FO, DevOps, Production Support) for seamless delivery.\nDrive development for Stress Testing and Regulatory Risk projects in the Market Risk domain.\nManage project technical aspects, including planning, governance, and taking ownership of initiatives.\nDeliver high-quality solutions independently within a globally matrixed environment and under tight deadlines.\nRequired Technical Qualifications:\nI. Core Python & System Development:\n6+ years of hands-on experience in Application Development, primarily with Python.\n Expert-level Python 3.x proficiency for scalable, resilient, and high-performance applications.\nAdvanced knowledge of Python frameworks (FastAPI, Django, Flask), best practices, and design patterns (OOP).\nStrong understanding of software architecture principles and distributed system design (Microservices, Event-Driven Architecture).\nExtensive experience with relational (PostgreSQL, Oracle, SQL Server) and NoSQL databases (MongoDB, Cassandra, Redis), including advanced SQL.\nProven expertise in designing, developing, and securing RESTful APIs and integration patterns.\nHands-on experience with CI/CD systems (Jenkins, GitLab CI, GitHub Actions, Bitbucket Pipelines) for automated deployment.\nHighly experienced with Unix-based operating systems.\nII. Cloud & DevOps:\nStrong background in cloud platforms (AWS, Azure, GCP), including containerization (Docker) and contributing to Kubernetes orchestration.\nAdvanced troubleshooting, debugging, and performance optimization for distributed systems.\nProficiency in automated testing frameworks (Pytest, unittest) and TDD methodologies.\nSolid understanding of secure coding practices and application security principles (OWASP Top 10).\nExpertise in Git (Bitbucket, GitHub) for advanced branching and pull request workflows.\nIII. Quantitative & Risk Domain:\nExperience developing Quantitative/Calc-intensive Python solutions with advanced computation libraries.\nSound understanding and exposure to various Risk Methodologies.\nExposure to mathematical modeling/finance insights.\nIV. Artificial Intelligence (AI) Integration (Exposure):\nExposure to AI/ML tools and frameworks (TensorFlow, PyTorch, scikit-learn).\nPractical experience with AI tools (Copilot, Devin, Claude/Gemini/GPT) for development workflows.\nExperience with Agentic AI tools, including writing Agents and Skills, and contributing to Agentic frameworks.\nUnderstanding and practical application of Generative AI concepts in software development.\nProfessional Skills:\nDeep understanding and practical experience with Agile/Scrum methodologies.\nExceptional ability to manage priorities and tasks effectively.\nStrong analytical, logical, systems thinking, and critical analysis skills.\nExcellent written and verbal communication for diverse audiences.\nAbility to work independently, take ownership, and collaborate effectively in global teams.\nDesirable Qualifications:\nPolyglot Programming Exposure (e.g., Java).\nBig Data Technologies (Apache Spark, Hadoop, Kafka) and data warehousing.\nFrontend Development (React, Angular, Vue.js).\nRelevant Cloud or Industry Certifications.\nExperience with banking domain (pricing, risk), CFA/FRM certification.\nKey Focus Areas / Desirable Skills\nFoundational Models: Gemini, OpenAI, Claude, Llama, Local Models\nMachine Learning: PyTorch, TensorFlow, Fine-tuning\nFrameworks: LangChain, LlamaIndex, Hugging Face\nRetrieval Augmented Generation: PostgreSQL, Vector DBs, Advanced Retrieval\nOrchestration: LangGraph, Multi-Agent Systems\nDevelopment: Python, FastAPI, Async Programming\nDeployment: Docker, Production APIs, Monitoring\nApplied Methodology: Prompt Engineering, Workflow Design, GenAI Optimization\nEducation:\nBachelor’s degree/University degree or equivalent experience in Computer Science, Engineering, or Technology\nMaster’s degree preferred\nThis job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.\n------------------------------------------------------\nJob Family Group:\nTechnology------------------------------------------------------\nJob Family:\nApplications Development------------------------------------------------------\nTime Type:\nFull time------------------------------------------------------\nPrimary Location Full Time Salary Range:\n$120,800.00 - $170,800.00------------------------------------------------------\nMost Relevant Skills\nPlease see the requirements listed above.------------------------------------------------------\nOther Relevant Skills\nFor complementary skills, please see above and/or contact the recruiter.------------------------------------------------------\nAutomated Processing and AI\nWe 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.\nImportantly, 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.\n------------------------------------------------------\nThis job opening is for an existing job vacancy.\n------------------------------------------------------\nCiti 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.\nIf 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.\nView Citi’s EEO Policy Statement and the Know Your Rights poster.","description_format":"text","description_chars":6939,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services","Wealth Management & Financial Advisors","Payment Processing & Gateways","Consumer Loans & Pawnshops"],"lifecycle":[{"event":"open","at":"2026-10-10T12:39:15Z"}],"visa":[],"liveness":{"score":84,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.838,"p_room":1,"age_days":2,"expected_fill_days":10,"reasons":["conf:0","win:early","comp:brand"],"computed_at":"2026-10-11T04:28:10Z"},"pay":{"stated_usd_annual":119671,"is_top_pay":false},"html_url":"https://alion.io/job/citi-senior-python-engineer-3","json_url":"https://alion.io/job/citi-senior-python-engineer-3.json","meta":{"generated_at":"2026-10-11T04:28:10Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3179,"day_limit":5000,"remaining_today":1821,"minute_limit":60,"resets_at":"2026-10-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":7841},"rest":"https://alion.io/mcp/rest/get_company?id=7841"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fciti-senior-python-engineer-3"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fciti-senior-python-engineer-3"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fciti-senior-python-engineer-3"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/citi-senior-python-engineer-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fciti-senior-python-engineer-3"}]}