Full-Stack Tech Lead — AI-Driven Architect & Systems Design

Citigroup Inc.; Mississauga; On-site; CAD 120,000 - 180,000; Full time

Job summary

Citi in Mississauga is seeking a Senior Full Stack Tech Lead to guide the design and implementation of scalable applications in collaboration with the Technology team. You will translate complex business needs into robust architectures and lead by example across the SDLC using modern React, TS, and Python stacks.

You will drive AI-enabled development, establish guardrails for secure code, and own CI/CD pipelines, Docker/Kubernetes deployments, and scalable system design.

Qualifications

• BS or higher in computer science or related field.
• 6+ years in full-stack development with modern frameworks.
• Strong experience designing scalable systems and APIs.

Responsibilities

• Design, develop and maintain scalable full-stack applications using ReactJS, Typescript and Python.
• Translate complex business requirements into technical architecture and design documents.
• Contribute to system architecture decisions (monolith vs microservices, database design, API strategies).
• Support development strategies and CI/CD pipelines, ensuring smooth release processes.
• Lead by example in using Claude Code as a primary development accelerator and tooling.
• Define guardrails, review processes, and quality gates for AI-generated code.

Skills

ReactJS

Typescript

Python

API design

System architecture

DevOps

CI/CD

Distributed systems

AI integration

Quality gates

Education

Bachelor's degree

Master's degree

Tools

Docker

Kubernetes

Terraform

CI/CD tooling

Job description

Citi in Mississauga is seeking a Senior Full Stack Tech Lead to guide the design and implementation of scalable applications in collaboration with the Technology team. You will translate complex business needs into robust architectures and lead by example across the SDLC using modern React, TS, and Python stacks.

You will drive AI-enabled development, establish guardrails for secure code, and own CI/CD pipelines, Docker/Kubernetes deployments, and scalable system design.