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Added 43 mins ago
LC
Cashier, Hourly Part Time Day
Loblaw Companies Limited
Regina, SK
- Part-time
Each store has an Associate-Owner, so you will work for a local business owner while having the support of a national brand. Benefit from a purchase discount program, flexible and varied…
Added 43 mins ago
LC
Cashier, Hourly Part Time Day
Loblaw Companies Limited
Hamilton, ON
- Part-time
Each store has an Associate-Owner, so you will work for a local business owner while having the support of a national brand. Benefit from a purchase discount program, flexible and varied…
Added 1 hour ago
E
Senior Product Support Professional
Ericsson
Ottawa, ON
- Full-time
Product and Portfolio: Product Owner or Product Manager roles translating customer needs and field insights into roadmap priorities and measurable outcomes.
Added 2 hours ago
EO
Manager, Canada Region
Entrepreneurs' Organization
Canada
- Full-time
Manage a portfolio of up to 14 chapters as the primary staff relationship owner.
Added 2 hours ago
F
Senior Product Manager, Financial Infrastructure
Float
Remote, Canada
- Full-time
- Remote
At Float, everyone is an owner, bringing their unique perspective to our team and product. Your voice is important, and we take having a culture based on feedback seriously. We openly share…
Added 3 hours ago
M
Senior Project Manager - Professional Services
MongoDB
Vancouver, BC
- Full-time
MongoDB Professional Services serves as the delivery owner for complex customer initiatives, translating strategic goals into disciplined execution and measurable business outcomes across…
Added 3 hours ago
TI
AI Software Development Engineer in Test
Trimble Inc.
Kamloops, BC · Canada - Kamloops, BC
- Full-time
…agents, directly accelerating release cycles and transforming product quality across our flagship construction software…
Added 4 hours ago
SL
Associate Director, Investment Data - SLC Management
Sun Life
Toronto, ON · Sun Life Toronto One York
- Full-time
· Experience working as a Product Owner, Business Analyst, Data Analyst, or similar role within Agile delivery environments, with responsibility for backlog management, prioritization, user…
Added 4 hours ago
SM
Associate Director, Investment Data - SLC Management
SLC Management
Toronto, ON · Sun Life Toronto One York
- Full-time
· Experience working as a Product Owner, Business Analyst, Data Analyst, or similar role within Agile delivery environments, with responsibility for backlog management, prioritization, user…
Added 4 hours ago
A
Information Technology - Lead Analytics Engineer, Distribution Technology
Aritzia
Delta, BC
- Full-time
Review and approve model changes and be the technical owner for specific data sub-domains
Added 4 hours ago
A
Information Technology - Senior Analytics Engineer/Analytics Engineer, Marketing & Transformation Technology
Aritzia
Vancouver, BC
- Full-time
Review and approve model changes and be the technical owner for specific data sub-domains
Added 4 hours ago
SF
Senior Consultant, Digital Analytics - Simplii Financial
Simplii Financial
Toronto, ON
- Full-time
…the other side of it. You think about the person using the product and you make sure the data you surface helps the business serve them…
Added 4 hours ago
A
Information Technology - Senior Analytics Engineer/Analytics Engineer, Marketing & Transformation Technology
Aritzia
Vancouver, BC
- Full-time
Review and approve model changes and be the technical owner for specific data sub-domains
Added 5 hours ago
TI
AI Software Development Engineer in Test
Trimble Inc.
Kamloops, BC
- Full-time
…agents, directly accelerating release cycles and transforming product quality across our flagship construction software…
Added 5 hours ago
S
Senior Director Finance
SinaLite
Markham, ON
- Full-time
Develop and maintain accurate job, product, and SKU-level costing across our manufacturing operations.
Added 6 hours ago
TC
Senior Manager, User Engagement
Thrive Career Wellness Platform
Toronto, ON
- $90,000 to $120,000 CAD / year
- Full-time
…outcomes they achieve. This is a new role and the first dedicated owner of this function.Our participants are going through something real: some have just been laid off, some are early in…
Added 6 hours ago
T
Sr. Business Systems Analyst - Core Platform
TD
Toronto, ON
- Full-time
…You will work in close collaboration with Journey partners, Product Owners, Architects, Software Engineers, and Quality Engineers to drive clarity, test, and support…
Added 6 hours ago
Senior Project Manager
MongoDB
Vancouver, BC
MongoDB Professional Services serves as the delivery owner for complex customer initiatives, translating strategic goals into disciplined execution and measurable business outcomes across…
Added 6 hours ago
SM
Senior Manager, Business Insights
Spin Master Ltd
Toronto, ON
- Full-time
…business. In this role, you will act as the principal architect and owner of our single source of business truth. You will lead a talented team of analysts to transform complex,…
Added 6 hours ago
WC
Quality Assurance Coordinator
World Courier
Mississauga, ON
- Full-time
Implementing processes to monitor product or service quality throughout the entire lifecycle from design to delivery. This may involve conducting inspections and analyzing data to ensure…
Added 6 hours ago
LC
Cashier, Hourly Full Time Flexible Shifts
Loblaw Companies Limited
Vancouver, BC
- Full-time
Each store has an Associate-Owner, so you will work for a local business owner while having the support of a national brand. Benefit from a purchase discount program, flexible and varied…
Added 7 hours ago
C
Développeur(euse) Java sénior
CGI
Montreal, QC
- Full-time
…faster, within a rigorous framework of code review, testing and data…
Added 7 hours ago
HC
Senior Platform Administrator (Salesforce) - ITS - FT Support
Humber College
Toronto, ON
- Full-time
Under the direction of the Technology Product Owner, the Senior Platform Administrator, Salesforce is responsible for managing configurations, customizations, data quality, and security, as…
Added 7 hours ago
C
Automation Tester
CGI
Toronto, ON
- Full-time
Provide regular testing status, defect updates, risks, and quality metrics to the Test Lead, Product Owner, and/or Manager.
Added 7 hours ago
C
Senior Quantexa Developer
CGI
Toronto, ON
- Full-time
Collaborate with fraud investigators, FCRM SMEs, data engineers, architects, and product owners to translate business requirements into reusable Quantexa solutions.

Reactiv

Full Stack Developer (Junior/Intermediate)

Toronto, ON, M5A 1M3, Canada

Full-time

Apply About employer

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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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