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Added 33 mins ago
GT
iOS Developer
GSPANN Technologies, Inc
Vancouver, BC
- Contract
Build native iOS applications using Swift and Objective-C following clean code principles
Added 49 mins ago
MG
Principal Engineer / Architect
Matrix Global
Toronto, ON
- Full-time
…lead the architecture, design, and delivery of next-generation cloud-native data and application platforms. This role is ideal for a senior technology leader who combines deep engineering…
Added 49 mins ago
MG
Java Engineer
Matrix Global
Toronto, ON
- Full-time
…responsible for designing, developing, and supporting scalable cloud-native applications, APIs, and integration services while leveraging modern Azure technologies and DevOps…
Added 1 hour ago
NC
Kubernetes Platform Developer
NAV CANADA
Ottawa, ON
- Full-time
Knowledge of Cloud Native applications and tooling.
Added 1 hour ago
NC
SWIM Software Developer
NAV CANADA
Ottawa, ON
- Full-time
Design and develop cloud-native backend services and messaging solutions supporting NAV CANADA's Service-Oriented and SWIM (System Wide Information Management) information exchange…
Added 1 hour ago
SI
Staff Cloud Security Engineer
Scribd, Inc.
Toronto, ON · Vancouver, BC
- Full-time
Define cloud telemetry requirements and improve detection coverage for cloud-native threats in partnership with Detection & Response.
Added 1 hour ago
AI Engineer Intern (Masters)
Electronic Arts
Vancouver, BC
Experience with cloud platforms (AWS, GCP, or Azure) and cloud-native tools (e.g. terraform) for managing infrastructure.
Added 2 hours ago
E
Senior Product Support Professional
Ericsson
Ottawa, ON
- Full-time
…and compute, focusing on next-gen development for open and cloud-native RAN software. With high-performing programmable networks, the unit helps Ericsson maintain technology…
Added 2 hours ago
Lead Network & Security Architect 1
Celestica International LP
Toronto, ON
Added 2 hours ago
Senior Specialist, Software Engineering (Middleware Azure)
CMHC - SCHL
Toronto, ON · Ottawa, ON · Montreal, QC
We are looking for an experienced Azure Developer to design, build, and support cloud native integrations and applications that power our enterprise platforms. The ideal candidate has…
Added 3 hours ago
C
Lead Network & Security Architect 1
Celestica
Toronto, ON
- Full-time
Added 3 hours ago
M
Technical Architect
Mphasis
Toronto, ON
- Contract
Drive cloud-native AI application development and deployment.
Added 3 hours ago
Senior Specialist, Software Engineering (.Net)
CMHC - SCHL
Ottawa, ON · Montreal, QC
Build cloud-native and .NET solutions, automate routine tasks, and optimize SQL and batch processes for performance and reliability.
Added 3 hours ago
Bilingual Advisor, Software Engineering
CMHC - SCHL
Toronto, ON · Ottawa, ON · Montreal, QC
A deep experience with cloud‑native and integration platforms, including Azure Functions, Logic Apps, and event‑driven or API‑based architectures.
Added 3 hours ago
Bilingual Senior Specialist, Software Engineering (.Net)
CMHC - SCHL
Ottawa, ON · Montreal, QC
Build cloud-native and .NET solutions, automate routine tasks, and optimize SQL and batch processes for performance and reliability.
Added 3 hours ago
AT
Sr Principal Developer
Aspen Technology
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time
Stay current with industry trends and best practices around cloud native and Software-as-a-Service technologies and recommend adoption strategies aligned with business goals.
Added 3 hours ago
TS
Architect - Azure/Terraform- Cloud Platform Engineer
TECONICA SOFTWARES
Toronto, ON
- Contract
Implement cloud security and enterprise governance using Azure-native services.
Added 3 hours ago
HD
Databricks Engineer
Hire DigITalent Inc.
Toronto, ON · Greater Toronto Area, Canada
- $90 to $110 CAD / hour
- Contract
Strong understanding of cloud-native architectures and emerging data technologies.
Added 3 hours ago
GS
Artificial Intelligence Engineer
Gala Solutions
Montreal, QC
- Contract
Implement cloud-native authentication and secrets handling - Entra ID with Managed Identity and workload federation, AWS IAM roles and STS - with the goal of eliminating stored credentials.
Added 4 hours ago
C
Senior Full Stack Developer (Angular & Java)
Cognizant
Toronto, ON
- $68,422 to $114,000 CAD / year
- Full-time
Develop and support cloud-native applications leveraging AWS, Azure, or OpenShift platforms.
Added 4 hours ago
T
Manager, Engineering – Easy Apply & Digital Onboarding Platform
TD
Toronto, ON
- Full-time
The successful candidate will oversee the design, delivery, and support of cloud-native applications built using Java, Spring Boot, microservices, event-driven architecture, APIs, and Azure…
Added 4 hours ago
C
Développeur(euse) Java sénior
CGI
Montreal, QC
- Full-time
…telecommunications. Working within Agile teams, you will build cloud native, full stack solutions from Spring Boot microservices and Kafka based event streaming to modern Angular or React…
Added 4 hours ago
PT
Cube Developer
Precision Technologies
Mississauga, ON
- Contract
Develop ETL/ELT processes using SQL, Power Query, or cloud-native tools.
Added 4 hours ago
Senior Manager, Azure Cloud Engineering
BMO
Toronto, ON · BMOPLACE
As a Senior Manager Azure Platform Engineering, you will play a hands‑on engineering role within BMO’s Azure cloud ecosystem. You will be responsible for designing, building, and operating…
Added 4 hours ago
M
Full-Stack Software Engineer
Manulife
Toronto, ON · Waterloo, ON
- Full-time
…work with complex business and calculation logic, strengthen cloud-native engineering skills, and contribute to the continued evolution of a business-critical…

Reactiv

Full Stack Developer (Junior/Intermediate)

Toronto, ON, M5A 1M3, Canada

Full-time

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Job details

Job type: Full-time
Experience: ● Roughly 2 to 4 years of experience building web applications, or equivalent project
Posting language: English
Posted: Oct 6, 2026

Original job description

Full Stack Developer Junior / Intermediate

About Reactiv

Reactiv is an AI-powered platform that helps Shopify merchants build beautifully branded, high-converting mobile apps without the usual complexity. At the core of what we do is Reactiv Clips, a feature that removes the need for app downloads so brands can deliver fully customized app experiences instantly and without friction. By lowering the barrier to great mobile experiences, we're building the future of mobile commerce, and we're growing our engineering team to help shape what comes next.

About the Role

We're looking for a Junior to Intermediate Full Stack Developer to help build and improve the platform our merchants rely on every day, from the dashboard they use to design and manage their apps to the e-commerce APIs that power them. You'll ship real features from early on, with support and mentorship from our engineering team to help you grow. Most of your work will be in TypeScript across React on the frontend and Node.js on the backend, with the chance to go deeper on whichever side excites you most. This is a hands-on role for someone earlier in their career who wants to develop into a strong full stack engineer in a collaborative, hybrid environment. You don't need to check every box below; if you're solid on the fundamentals and eager to learn the rest, we want to hear from you.

What You'll Do

Build and maintain features across our merchant dashboard React and TypeScript) and our backend services and e-commerce APIs Node.js and TypeScript).
Write and consume RESTful and GraphQL APIs that connect our frontend experiences to server-side functionality.
Work with relational databases such as Postgres: designing simple schemas, writing queries, and learning optimization along the way.
Contribute to our Shopify integrations that keep merchant data in sync.
Collaborate with product, design, and other engineers to define, design, and ship new features.
Help keep the platform fast and reliable by improving performance and responsiveness on both sides of the stack.
Take part in code reviews, both giving and receiving feedback, as part of how we maintain quality.
Troubleshoot and fix issues across the stack to improve the experience for merchants.

What We're Looking For

Required

Working knowledge of React and a solid grasp of its core concepts.
Some experience building backend services or APIs with Node.js.
Comfortable writing TypeScript, or strong JavaScript with a willingness to pick up TypeScript quickly.
An understanding of how frontend and backend talk to each other: RESTful APIs, requests, responses, and error handling.
Familiarity with relational databases such as Postgres or MySQL.
Strong problem-solving instincts and eagerness to learn in a fast-moving, collaborative team.
Roughly 2 to 4 years of experience building web applications, or equivalent project and portfolio work.

Nice to Have

Experience with GraphQL.
Familiarity with the Shopify ecosystem, or an interest in ecommerce.
Exposure to AWS services Lambda, S3, RDS, DynamoDB or other cloud infrastructure.
Experience with a React framework such as Next.js or React Router (formerly Remix).
Experience writing automated tests Jest, React Testing Library, or integration tests).
Understanding of authorization concepts such as OAuth and JSON Web Tokens.
Familiarity with CI/CD practices.
Exposure to React Native, or interest in contributing to mobile.

Why Join Us

Mentorship and growth: You'll have regular code review, pairing, and support from experienced engineers, with a clear path from junior to intermediate and beyond.
Level up with AI We're constantly exploring how AI can make us better engineers, and you'll have real freedom to experiment with cutting-edge tools rather than wait for permission. It's a fast way to grow.
Real impact: The features you build are used by merchants running their businesses around the world.
Hybrid work environment: We believe in a hybrid model to create opportunities for intentional in-person collaboration (and mentorship) while balancing that with the deep focus time that comes from working remotely. You'll join the team in our Toronto office 2 to 3 days a week with the flexibility to work remotely the rest of the time.
You're an owner: Every engineer at Reactiv gets equity, so you share in the upside you help create. You're not just building the product, you own a piece of it.
Benefits from day one: Extended health and dental coverage that kicks in the day you start, no waiting period.
Unlimited PTO We take time off seriously here. Most of our engineers take around three weeks a year, and more when they need it, and we actively encourage stepping away to rest and protect against burnout.

How to Apply

Send your resume and any project links, portfolio, or GitHub profile to careers@reactiv.ai. A cover letter is optional, but we'd welcome a short note on why this role interests you.

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More about this job

Responsibilities

You will build and maintain features across the merchant dashboard and backend services using TypeScript, React, and Node.js. Additionally, you will collaborate with product and design teams to ship new features while ensuring platform performance and reliability.

Requirements

The role requires 2 to 4 years of experience with React, Node.js, and TypeScript, along with a solid understanding of RESTful APIs and relational databases. Strong problem-solving skills and an eagerness to learn in a collaborative, fast-moving environment are essential.

Skills

TypeScript
React
Node.js
Postgres
RESTful APIs
GraphQL
Shopify
JavaScript
AWS
Next.js
React Router
Jest
React Testing Library
OAuth
CI/CD

Benefits

Equity
Extended health coverage
Dental coverage
Unlimited PTO

Visa sponsorship

Not detected in the job text

Keywords

Full Stack Developer
TypeScript
React
Node.js
Shopify
RESTful APIs
GraphQL
Postgres
MySQL
AWS
Lambda
S3
RDS
DynamoDB
Next.js
React Router
Jest
React Testing Library
OAuth
JSON Web Tokens
CI/CD
React Native
Mobile Commerce
Engineering
Hybrid Work
Equity
Mentorship
AI
Web Applications
Software Development

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