Senior Full Stack / React Native Developer to support a major application development initiative for our aviation client

S.I. Systems Ltd.

Toronto

On-site

CAD 110,000 - 160,000

Full time

3 days ago

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Job summary

S.I. Systems Ltd. in Downtown Toronto is seeking a Senior Full Stack / React Native Developer to support a major aviation client project.

You will own features end-to-end across mobile and backend, using React Native, Expo, Node.js, and GraphQL. The role requires strong frontend expertise, cloud/serverless experience, DevOps skills, and the ability to work autonomously. Expected duration is 1 year with on-site work four days a week.

Qualifications

Senior, hands-on developer with ownership of features.
Experience delivering iOS and Android apps with React Native.
Backend and cloud/serverless development experience.
Experience with AI-assisted development tools (Cursor/Claude Code).
Strong collaboration with cross-functional teams.

Responsibilities

Design, develop, test, and deploy mobile apps for iOS and Android using React Native and Expo.
Take end-to-end ownership of features from requirements to production support.
Develop scalable frontend solutions with React Native, Expo, React, and TypeScript.
Build and integrate backend services using Node.js, GraphQL, and cloud/serverless tech.
Develop and consume GraphQL APIs with Apollo Client and GraphQL Codegen.
Manage application state with Jotai and cache persistence.

Skills

React Native

Expo

React

TypeScript

GraphQL

Apollo Client

AWS serverless

CI/CD

AI tools (Cursor/Claude Code)

Node.js

iOS/Android

Tools

GraphQL Codegen

Firebase

CI/CD pipelines

Job description

Senior Full Stack / React Native Developer to support a major application development initiative for our aviation client

We are seeking a Senior Full Stack / React Native Developer to support a major application development initiative for our aviation client

The ideal candidate will bring strong frontend expertise in React Native and Expo, combined with hands-on backend, cloud/serverless, and DevOps experience. This is a highly autonomous development role requiring someone who can take ownership of an assigned feature or task and drive it through the entire development and deployment lifecycle with minimal supervision.

The successful candidate will also have experience with AI-enabled software development, particularly using tools such as Cursor or Claude Code to accelerate and enhance development.

Location : Downtown Toronto

Duration: 1-year contract, starting in October

Key Responsibilities

Design, develop, test, and deploy high-quality mobile applications for iOS and Android using React Native and Expo.
Take end-to-end ownership of assigned features, from requirements and solution design through development, testing, deployment, and production support.
Develop scalable frontend solutions using React Native, Expo, React, and TypeScript.
Build and integrate backend services using Node.js, GraphQL, and cloud/serverless technologies.
Develop and consume GraphQL APIs using Apollo Client and GraphQL Codegen.
Manage application state using Jotai, Apollo Client caching, and cache persistence.
Work within established enterprise design systems to deliver consistent, responsive, and accessible user experiences.
Support bilingual application functionality using i18next for English and French.
Leverage Firebase Analytics, Crashlytics, Performance Monitoring, and Remote Config for application monitoring and optimization.
Design, build, and maintain DevOps and CI/CD pipelines.
Support multiple application environments from local development through production.
Develop automated tests and maintain code quality using Jest, ESLint, and Husky.
Use AI-enabled development tools such as Cursor and/or Claude Code as part of the software development lifecycle.
Troubleshoot complex application issues across frontend, backend, API, cloud, and deployment layers.
Collaborate effectively with developers, designers, architects, product teams, and other technical stakeholders.

Must-Have Skills

Strong hands-on React Native development experience, ideally with Expo and Expo Router.
Advanced React and TypeScript development experience.
Strong experience developing mobile applications for both iOS and Android.
Strong experience with GraphQL and Apollo Client.
Experience with AWS and serverless/cloud-native application development.
Hands-on experience creating and maintaining CI/CD pipelines.
Experience using AI-assisted development tools, preferably Cursor and/or Claude Code.
Experience with application state management and caching solutions.
Strong understanding of the complete software development and deployment lifecycle.

Technical Environment

Core Technologies

React Native / Expo
React 19
TypeScript
Node.js 24
Yarn 4

Data & State Management

GraphQL
Jotai

DevOps, Testing & Monitoring

Firebase Analytics
Firebase Crashlytics
Firebase Performance Monitoring
Firebase Remote Config
Jest
ESLint
Husky

Ideal Candidate

The ideal candidate is a senior, hands-on developer rather than someone who requires significant technical direction. They should be comfortable owning a feature independently, making sound technical decisions, collaborating with the broader team when required, and taking their work all the way through development, testing, deployment, and production.

Strong React Native/Expo expertise, full-stack capability, AWS/serverless experience, DevOps knowledge, and modern AI-enabled development experience will be critical to success in this role.

Role Overview