Contract Sr Python Developer Jobs in Toronto, ON

Deloitte is seeking an experienced GenAI & Python Specialist to join our dynamic Operate team on a 1‑year fixed term employment basis. In this role, you will design, build, and scale Generative AI solutions using Python‑based frameworks, Large Language Models (LLMs), and advanced retrieval‑augmented generation (RAG) techniques.

• Strong Python development for GenAI and agentic systems
• Design and implementation of Agentic AI workflows using LangChain, LangGraph, ADK, MCP
• Development and orchestration of multi‑agent systems
• Implementation of Retrieval‑Augmented Generation (RAG), including advanced RAG techniques
• Integration and management of vector databases for RAG workflows
• Design and implementation of memory systems (short‑term, long‑term, persistence, conversational checkpoints)
• Agentic AI design and orchestration across workflows
• Work with AI/GenAI models including Gemini and Claude 4.5 on Vertex AI
• Development of business co‑pilots, including co‑pilot solutions for Risk Analysts
• Support for business process optimization using GenAI
• Use of NLU as an add‑on capability where required
• Contribution to CTO‑led tools, including:
  
  • Agent Flow for observability, drift monitoring, feedback loops
  • ML Flow for model evaluation and drift detection
  • Sourcing test results management, including truth tables and evaluations
  • Bringing Agent Flow into existing projects
• Domain‑specific GenAI solutions for DRO (Data and Regulatory Operations):
  
  • QA validation and KYC document processing
  • Systematic capture and validation of required fields
  • Automated document checking without extraction
  • Record retrieval and comparison (DNC, ANC, SMC)
  • Agentic framework for document management, data analysis, and data engineering
• Co‑Labs initiatives:
  
  • Consolidation across MCP endpoints
  • Agent registries consolidation
  • Combining assets into an accessible catalog
• Python‑based web scraping and utility development
• Work with existing Python GitHub repositories
• Integration with case management tools and Appian workflows (NA10)
• Building agents on top of Appian workflows using ADK

This is your opportunity to work in Operate at Deloitte. Operate services harness the latest technologies, talent, and capabilities from all over the world to deliver ongoing outcomes and client value. We do more than traditional business process outsourcing. We do more than just “keeping the lights on.” We work shoulder-to-shoulder with clients and their customers, constantly adapting to the pace of change, to ideate, innovate, and embed continuous advantage at the heart of their operations. And we do it with the kind of drive and passion that comes from loving what you do—and who you do it with.

You are someone with these skills, experience & qualifications:

• 6+ years of hands‑on experience designing and implementing AI / GenAI solutions using Python
• Strong proficiency in Python engineering for data processing, model integration, APIs, and microservices
• Deep understanding of Generative AI, LLMs, and NLP concepts and architectures
• Experience building agentic AI workflows using LangGraph, including multi‑step reasoning, tool‑calling, and planner–executor patterns
• Advanced knowledge of RAG techniques, including hybrid search, vector and multi‑vector retrieval, embeddings, and context optimization
• Experience designing and deploying APIs and microservices to production environments
• Familiarity with traditional ML/NLP techniques such as clustering, extraction, and enrichment to complement GenAI solutions
• Strong communication skills, a collaborative mindset, and a passion for continuous learning and innovation in the GenAI space

The salary range for this position is $72,000 - $125,000, and individuals may be eligible to participate in our bonus program. Deloitte is fair and competitive when it comes to the salaries of our people. We regularly benchmark across a variety of positions, industries, sectors, targets, and levels. Our approach is grounded on recognizing people's unique strengths and contributions and rewarding the value that they deliver.
Our Total Rewards Package extends well beyond traditional compensation and benefit programs and is designed to recognize employee contributions, encourage personal wellness, and support firm growth.  Along with a competitive base salary and variable pay opportunities, we offer a wide array of initiatives that differentiate us as a people-first organization. On top of our regular paid vacation days, some examples include: $4,000 per year for mental health support benefits, a $1,300 flexible benefit spending account, firm-wide closures known as "Deloitte Days", dedicated days of for learning (known as Development and Innovation Days), flexible work arrangements and a hybrid work structure.