AI-Driven Fullstack Engineer (Hybrid/Contract)

Adastra; Markham; Hybrid; CAD 83,000 - 152,000; Part time

Benefits offered by this job

Career progression

Competitive compensation

Successful referral program

Canada’s 50 Best Managed Companies

Flexible, dynamic, diverse workplace

Job summary

Adastra seeks a Full Stack Developer to build scalable, production-ready applications combining backend engineering with AI and Generative AI capabilities. The role focuses on Python/Java backend and reusable SDKs, with front-end work in React/TypeScript and cloud deployment via Docker/Kubernetes.

Primary location is Toronto or Brampton with a hybrid 4-days onsite model. This contractor role involves delivering secure, reliable enterprise solutions and collaborating across engineering, product,

Qualifications

• Strong hands-on backend development experience using Python and Java.
• Experience designing and developing scalable APIs, backend services, and reusable SDKs.
• Hands-on experience with FastAPI, Spring Boot, and microservices architecture.
• Strong experience developing AI and Generative AI applications.
• Experience working with large language models, retrieval-augmented generation, and agentic AI.
• Hands-on experience with LangChain, LangGraph, and Model Context Protocol.

Responsibilities

• Design, develop, and maintain scalable backend services, APIs, and reusable SDKs using Python and Java.
• Build backend solutions using FastAPI, Spring Boot, and microservices architecture.
• Develop AI-powered applications using large language models, retrieval-augmented generation, agentic AI, LangChain, LangGraph, and Model Context Protocol.
• Integrate commercial and open-source AI models into enterprise applications.
• Build responsive web applications using React, TypeScript, and modern frontend frameworks.
• Integrate frontend applications with backend APIs and AI-powered services.
• Develop and integrate AI platform capabilities, including model gateways, prompt management, vector databases, evaluation frameworks, and guardrails.
• Deploy and support applications using cloud platforms, Docker, Kubernetes, and CI/CD pipelines.
• Implement automated testing, observability, performance optimization, and secure API design.
• Support enterprise authentication and authorization requirements.
• Collaborate with engineering, product, and cross-functional teams to deliver scalable and maintainable solutions.

Skills

Python

Java

API design

FastAPI

Spring Boot

Microservices

React

TypeScript

AI / Generative AI

LangChain

LangGraph

Model Context Protocol

Docker

Kubernetes

Tools

Docker

Kubernetes

React

TypeScript

FastAPI

Spring Boot

LangChain

LangGraph

Job description

Adastra seeks a Full Stack Developer to build scalable, production-ready applications combining backend engineering with AI and Generative AI capabilities. The role focuses on Python/Java backend and reusable SDKs, with front-end work in React/TypeScript and cloud deployment via Docker/Kubernetes.

Primary location is Toronto or Brampton with a hybrid 4-days onsite model. This contractor role involves delivering secure, reliable enterprise solutions and collaborating across engineering, product,