Full Stack Developer (React, Python) - Assistant Vice President

Citi; Mississauga; On-site; CAD 94,300 - 141,500; Full time

Job summary

Citi in Mississauga is seeking a Full Stack Developer to contribute to new and revised application systems in coordination with the Technology team. The role focuses on delivering scalable full‑stack applications and shaping modern architecture and development practices.

You will design and build with ReactJS, Typescript and NestJS, translate business requirements into architecture, and help drive CI/CD and AI-assisted development initiatives while ensuring secure, robust software delivery.

Qualifications

• Deep proficiency in ReactJS (hooks, context, state management libraries such as Redux/Zustand/Recoil).
• At least 5+ years in full-stack development with ReactJS, Typescript, NestJS.
• Advanced Typescript knowledge or similar language including generics, decorators and advanced typing strategies.
• Strong experience in NestJS or similar framework (modular architecture, middleware, interceptors, guards, providers).
• Expertise in API design principals (REST, GraphQL, versioning, error handling, performance tuning).
• Proficiency with databases (SQL & NoSQL) and related tools like TypeORM or Prisma.
• Strong command of modern HTML/CSS, responsive design and accessibility standards.
• Experience with design systems and component libraries.
• Familiarity with event-driven architecture, messaging queues (Kafka, RabbitMQ, etc).
• Experience with AI coding.
• Skilled in designing distributed systems and scalable applications.
• Knowledge of DevOps practices (Docker, Kubernetes, Terraform, CI/CD pipelines).
• Hands-on experience with large-scale, production-grade applications.

Responsibilities

• Design, develop and maintain scalable full-stack applications using ReactJS, Typescript and NestJS.
• 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. From scaffolding features and writing tests to refactoring and documentation generation.
• Design and implement agentic workflows where Claude Code autonomously handles multi-step engineering tasks such as issue triage, code review assistance, PR generation, and deployment scripting.
• Ideate and prototype AI-augmented engineering processes identifying opportunities where agentic AI can reduce manual effort across the SDLC (e.g., automated bug fixes, test generation, dependency upgrades).
• Establish prompt engineering standards and best practices for the team to ensure consistent, high-quality outputs from AI coding tools.
• Evaluate and integrate emerging AI coding capabilities into the team’s toolchain, staying ahead of the curve on agentic AI developments.
• Define guardrails, review processes, and quality gates for AI-generated code to ensure security, correctness, and maintainability.

Skills

ReactJS

Typescript

NestJS

API design

SQL/NoSQL

UI/UX

DevOps

Docker

Kubernetes

AI coding

Distributed systems

Testing/CI

GraphQL

Education

Bachelor’s degree

Master’s degree preferred

Tools

TypeORM

Prisma

Job description

The Full Stack Developer is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities.

Responsibilities

• Design, develop and maintain scalable full‑stack applications using ReactJS, Typescript and NestJS.
• Translate complex business requirements into technical architecture and design documents.
• Contribute to system architecture decisions (e.g. 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. From scaffolding features and writing tests to refactoring and documentation generation.
• Design and implement agentic workflows where Claude Code autonomously handles multi‑step engineering tasks such as issue triage, code review assistance, PR generation, and deployment scripting.
• Ideate and prototype AI‑augmented engineering processes identifying opportunities where agentic AI can reduce manual effort across the SDLC (e.g., automated bug fixes, test generation, dependency upgrades).
• Establish prompt engineering standards and best practices for the team to ensure consistent, high‑quality outputs from AI coding tools.
• Evaluate and integrate emerging AI coding capabilities into the team’s toolchain, staying ahead of the curve on agentic AI developments.
• Define guardrails, review processes, and quality gates for AI‑generated code to ensure security, correctness, and maintainability.

Qualifications

• Deep proficiency in ReactJS (hooks, context, state management libraries such as Redux/Zustand/Recoil).
• At least 5+ years in full‑stack development with ReactJS, Typescript, NestJS.
• Advanced Typescript knowledge or similar language including generics, decorators and advanced typing strategies.
• Strong experience in NestJS or similar framework (modular architecture, middleware, interceptors, guards, providers).
• Expertise in API design principals (REST, GraphQL, versioning, error handling, performance tuning).
• Proficiency with databases (SQL & NoSQL) and related tools like TypeORM or Prisma.
• Strong command of modern HTML/CSS, responsive design and accessibility standards.
• Experience with design systems and component libraries.
• Familiarity with event‑driven architecture, messaging queues (Kafka, RabbitMQ, etc).
• Experience with AI coding.
• Skilled in designing distributed systems and scalable applications.
• Knowledge of DevOps practices (Docker, Kubernetes, Terraform, CI/CD pipelines).
• Hands‑on experience with large‑scale, production‑grade applications.

Education

• Bachelor’s degree/University degree or equivalent experience.
• Master’s degree preferred.

This job description provides a high‑level review of the types of work performed. Other job‑related duties may be assigned as required.

Salary Range: $94,300.00 – $141,500.00

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

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