Lead GenAI Full-Stack Engineer

Apptoza Inc.; Toronto; On-site; CAD 120,000 - 180,000; Full time

Job summary

Apptoza Inc. is seeking a senior backend engineer to design, build, and deliver advanced Gen AI-enabled systems in Toronto. You will lead end-to-end delivery, define architecture, and collaborate with data scientists, product owners, and frontend teams.

You will mentor developers, drive best practices, and implement scalable solutions using Java or Python, React frontends, and cloud platforms like OpenShift and Kubernetes.

Qualifications

• 7+ years backend development experience in Java or Python.
• REST API and microservices experience.
• Frontend development with React and micro-frontend architectures.
• Hands-on experience or strong understanding of Agentic AI concepts, LLM integrations.
• Understanding of prompt engineering and Gen-AI development tools (GitHub Copilot, Windsurf, Claude Code).
• Experience with Cloud platforms and technologies (OpenShift, Kubernetes, S3 Object Storage).
• Experience with PostgreSQL, including schema design and query optimization.

Responsibilities

• Lead end-to-end technical delivery of projects and architecture decisions.
• Collaborate with stakeholders to translate objectives into technical solutions.
• Provide technical direction and mentorship to junior developers.
• Implement Gen AI systems into production and ensure alignment with business objectives.

Skills

Backend (Java/Python)

REST API

Microservices

React & MFE

Agentic AI

LLM integration

Prompt engineering

GenAI tools

Cloud platforms

PostgreSQL

Tools

GitHub Copilot

Windsurf

Claude Code

OpenShift

Kubernetes

S3 Object Storage

Job description

Apptoza Inc. is seeking a senior backend engineer to design, build, and deliver advanced Gen AI-enabled systems in Toronto. You will lead end-to-end delivery, define architecture, and collaborate with data scientists, product owners, and frontend teams.

You will mentor developers, drive best practices, and implement scalable solutions using Java or Python, React frontends, and cloud platforms like OpenShift and Kubernetes.