Senior AI Back-End Engineer
Location
Canada
Posted
91 days ago
Salary
$90K - $130K / year
Seniority
Senior
Job Description
Senior AI Back-End Engineer
Newfold Digital
• Design & scale async REST/WebSocket APIs with Python 3.11+ + FastAPI • Implement multi-agent workflows with Semantic Kernel (handoff, sequential, concurrent) • Integrate LLM providers (OpenAI GPT-4.1/mini, Google Gemini 2.5 Flash) behind a provider-agnostic layer for A/B and cost-aware routing • Deliver Retrieval-Augmented Generation with vector stores such as Azure AI Search, pgvector, or Chroma • Expose tool-using agents via OpenAI Assistants (Code-Interpreter) for data-analysis / file-manipulation tasks • Evolve schemas with SQLModel / SQLAlchemy 2 & Alembic ; tune Postgres for high-concurrency async access • Maintain robust CI/CD (Bitbucket Jenkins) that lint, type-check, test, package (Docker), and deploy • Instrument services with structlog JSON logs, OpenTelemetry traces, and cost/latency metrics ; hold p95 < 100 ms • Champion AI-assisted development (GitHub Copilot, Cursor) and share pragmatic problem-solving practices with the team
Job Requirements
- 5 + yrs building production APIs in Python
- 2 + yrs with FastAPI (or similar async stack)
- Deep knowledge of async I/O, Pydantic v2, DI, and observability
- Hands-on with Semantic Kernel or comparable agent frameworks
- Practical RAG implementations using Azure AI Search, pgvector, or Chroma
- Strong Postgres skills, including SQLModel / SQLAlchemy 2 and Alembic migrations
- Proven integrations or Side Projects with LLM APIs (OpenAI, Gemini) and structured-output design
- Dependency management via Poetry and virtual-env isolation
- End-to-end CI/CD ownership (build → scan → test → deploy)
- Excellent analytical and problem-solving ability
- Remote work readiness with daily overlap of at least 09:00 – 13:00 EST
Benefits
- competitive HMO benefits – 175k MBL with one free dependent upon one year of service!
- Punctuality Bonus
- Generous Vacation policy
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