Newfold Digital

Senior AI Back-End Engineer

Newfold Digital

full-time

Posted on:

Location Type: Remote

Location: Canada

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Job Level

Senior

Tech Stack

AzureDockerPostgresPython

About the role

  • Design & scale async REST/WebSocket APIs with Python 3.11+ + FastAPI
  • Implement multi-agent workflows with Semantic Kernel to route traffic among specialised LLM agents
  • Integrate LLM providers 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 for data-analysis / file-manipulation tasks
  • Evolve schemas with SQLModel / SQLAlchemy 2 & Alembic; tune Postgres for high-concurrency async access
  • Maintain robust CI/CD that lint, type-check, test, package (Docker), and deploy
  • Instrument services with structlog JSON logs, OpenTelemetry traces, and cost/latency metrics
  • Champion AI-assisted development and share pragmatic problem-solving practices with the team

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
  • Work-life balance
  • Competitive HMO benefits – 175k MBL with one free dependent upon one year of service!
  • Punctuality Bonus
  • Generous Vacation policy
  • Programs that bring us together on important issues and provide learning and development opportunities for all employees
  • 20 + affinity groups where you can network and connect with Newfolders globally
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
Python 3.11+FastAPIasync I/OPydantic v2Semantic KernelRetrieval-Augmented GenerationPostgresSQLModelSQLAlchemy 2Alembic
Soft Skills
analytical abilityproblem-solvingteam collaborationpragmatic practices