Python AI Backend Engineer

Dexian; Mississauga; On-site; CAD 120,000 - 150,000; Full time

Job summary

Dexian is seeking a hands-on Python AI Backend Engineer to build enterprise-grade GenAI applications from end to end in Mississauga, Canada. The role focuses on Python-based backend services, REST APIs, and scalable architectures using LangChain, RAG, and containerized deployments.

You will design, develop, test, and support AI-powered backend systems, collaborate across teams, and contribute to end-to-end SDLC with a strong emphasis on scalable API design and event-driven integrations.

Qualifications

• 5+ years Software Engineering with Python.
• End-to-End Software Development (Full SDLC).
• System Design
• Python
• FastAPI / Flask
• REST APIs & Microservices
• System Design & Component-Based Architecture
• LangChain / RAG (Retrieval-Augmented Generation)
• Google ADK
• Agentic AI / GenAI / LLM Applications
• PySpark
• Docker / Containerization

Responsibilities

• Design, develop, test, and support Python-based applications and services.
• Build and maintain REST APIs, microservices, and event-driven integrations.
• Participate in the full software development lifecycle, including design, coding, testing, deployment, and support.
• Build AI-powered backend services
• Design scalable APIs
• Build RAG-based applications
• Integrate MCP servers
• Deploy applications using containerized environments

Skills

Python

FastAPI

System Design

End-to-End Software Development

REST APIs

Microservices

LangChain

RAG

PySpark

Docker

AI Backend Development

MCP Servers

GenAI/LLM Applications

Education

Bachelor's degree/University degree or equivalent in a STEM-related field

Job description

Top/Required Skills: Python, FastAPI, System Design, End-to-End Software Development, REST APIs, Component-Based Architecture, MCP Servers, Google ADK, LangChain, RAG (Retrieval-Augmented Generation), PySpark, PostgreSQL, Docker, CI/CD Pipelines, Agentic AI / GenAI, AI Backend Development.

Looking for a hands-on Python AI Backend Engineer capable of building enterprise-grade GenAI applications from end to end.

Responsibilities

• Design, develop, test, and support Python-based applications and services.
• Build and maintain REST APIs, microservices, and event-driven integrations.
• Participate in the full software development lifecycle, including design, coding, testing, deployment, and support.
• Build AI-powered backend services
• Design scalable APIs
• Build RAG-based applications
• Integrate MCP servers
• Deploy applications using containerized environments

Must-Have Skills

• 5+ years Software Engineering with Python
• End-to-End Software Development (Full SDLC)
• System Design
• Python
• FastAPI / Flask
• REST APIs & Microservices
• System Design & Component-Based Architecture
• LangChain / RAG (Retrieval-Augmented Generation)
• Google ADK
• Agentic AI / GenAI / LLM Applications
• PySpark
• Docker / Containerization

Education

• Bachelor's degree/University degree or equivalent experience in a STEM-related field. Advanced degree preferred.