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Added 12 mins ago
J
Manager of Projects (MOP)
Jacobs
Calgary, AB
- $168,600 to $221,325 USD / year
- Full-time
Share best practices and lessons learned to promote continuous product and process improvement
Added 12 mins ago
Dev. Machine Learning Engineering II
Bell
Toronto, ON
We are seeking a highly skilled and experienced Machine Learning Engineering Developer II to join our team. This role requires a strong understanding of machine learning principles,…
Added 12 mins ago
A
Learning Program Manager - 1 year term
Assent
Ottawa, ON
- $80,000 to $90,000 CAD / year
- Full-time
At the center of our offering is the Assent Network, the industry’s most complete Product Intelligence Network, bringing together trusted parts and supplier intelligence, advanced AI and…
Added 12 mins ago
MG
Principal Engineer / Architect
Matrix Global
Toronto, ON
- Full-time
…scalable and resilient solutions, and partnering with engineering, product, and platform teams to deliver high-performance systems. This individual will serve as a technical authority…
Added 26 mins ago
RT
SALES MANAGER
Regency Toyota Vancouver
Vancouver, BC
- Full-time
Lead, coach, train, and motivate Product Advisors while supporting their daily activities
Added 26 mins ago
CB
Full Time Sales Assistant - Deerfoot City
COBS Bread
Calgary, AB
- Full-time
Be responsible for merchandising product and executing marketing campaigns
Added 26 mins ago
BG
Powertrain, Chassis and Electronics, Validation and Integration - Placement Year
BMW Group
Goodwood, ON
- Internship
Develop and deliver a personal project with direct relevance to product/process improvement.
Added 26 mins ago
B
Account Executive - Full-Cycle (North America)
Botpress
Montreal, QC
- Full-time
The work ahead is ambitious. The opportunity is rare. We take a deliberate approach to growth: product-led, capital-efficient, and highly focused.
Added 26 mins ago
HR
Project Sales Representative, ProSolutions
Herc Rentals
Ardmore, AB
- Full-time
Promote and cross-sell all company product lines, specialty equipment, services, and value-added solutions.
Added 26 mins ago
JT
Product Development Engineer
jeans test
Engineer, BC
- Full-time
Provide technical assistance to Marketing in order to enhance product promotion and provide key selling points from a technical perspective.
Added 26 mins ago
HR
Electrical Component Engineering Intern (Fall 2026 or Winter 2027)
Hitachi Rail
Toronto, ON
- $23 to $30 CAD / hour
- Full-time
Work with Product HSE team to ensure compliance
Added 26 mins ago
B
Dev. Machine Learning Engineering II
Bell
Toronto, ON
- Full-time
We are seeking a highly skilled and experienced Machine Learning Engineering Developer II to join our team. This role requires a strong understanding of machine learning principles,…
Added 26 mins ago
ZA
Vans Outdoor Sales Consultant - Mercedes-Benz Toronto-Queensway - 26314
Zanchin Automotive Group
Toronto, ON
- Full-time
Vans Outside Sales & Leasing Consultant (Vehicle Product Specialist) career and employment opportunity awaits you.
Added 26 mins ago
AE
Senior Director, Global Sports & Partnership Marketing
Arc'teryx Equipment
North Vancouver, BC
- Full-time
…partners, and guests. We work in close collaboration with Brand, Product, Creative, Communications, and local Community teams, as well as with external partners and agencies, to create…
Added 26 mins ago
ET
Enterprise Architect
Encore Technical Solutions Inc.
Markham, ON
- Contract
Lead cross-functional technology product evaluations and define lifecycles for technologies across the portfolio
Added 28 mins ago
JB
Sales Associate - JAK's Coquitlam Central
JAK's Beer Wine & Spirits
Port Coquitlam, BC · COQUITLAM, British Columbia
- Part-time
Product Knowledge Seminars: Includes complimentary tasting kits.
Added 41 mins ago
KB
Cashier - Part Time
Kent Building Supplies
St. Stephen, NB
- Part-time
…Co-operative and the ARENA buying group which ensures our great product selection and…
Added 43 mins ago
O
Analyst, Derivative Operations
OMERS
Toronto, ON · Head Office Toronto
- Full-time
…role in middle office workflows including analyzing derivative product requirements across various markets, on-boarding and managing counterparties, vendors and new products as well as life…
Added 43 mins ago
O
Front End Developer 2
OLG
Sault Ste. Marie, ON · Toronto, ON · Foster Drive Office
- Full-time
Front-End Developer Level 2 (12 months contract)
Added 43 mins ago
TI
AI Software Development Engineer in Test
Trimble Inc.
Kamloops, BC · Canada - Kamloops, BC
- Full-time
Shape the Future of Construction AI as an AI Software Developer Engineer in Test!
Added 56 mins ago
S
SOV Store - Travel Expert
Sunwing
Mississauga, ON
- Full-time
Added 56 mins ago
CB
Full-Time, Part-Time 3AM-11AM Early Morning Baker
COBS Bread
Markham, ON
- Full-time
- Part-time
The satisfaction of baking from scratch, and pride in sharing that product with the community
Added 56 mins ago
WC
(CAN) Food Lead Department Manager
Walmart Canada
Mount Pearl, NL
- Full-time
Provides friendly and professional customer service by greeting customers, assisting with product selection, promoting products and services, helping locate merchandise, and resolving…
Added 56 mins ago
WC
(CAN) OMNI Lead Department Manager
Walmart Canada
Mount Pearl, NL
- Full-time
Added 56 mins ago
WC
(CAN) Pharmacy Manager
Walmart Canada
North Battleford, SK
- Full-time

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.

Apply About employer

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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