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Added 1 month ago
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Staff Software Engineer - Core Edge Processing
Marqeta
Remote, Canada
- Full-time
- Remote
As Marqeta's Staff Software Engineer on the Core Edge Processing team, you will write and review production code at the heart of our processing systems, drive the initiatives that make them…
Added 1 month ago
SI
Senior iOS Engineer
Scribd, Inc.
Toronto, ON · Vancouver, BC
- Full-time
…to choose the workstyle and location that support their best performance, while committing to intentional in-person moments that strengthen collaboration and culture. Occasional in-person…
Added 1 month ago
WI
Civil Engineer, Municipal Engineering & Land Development
WSP in Canada
Terrace, BC
- Full-time
WSP is seeking an experienced Civil Engineer (Municipal & Land Development) to join our growing Infrastructure team in Terrace, BC.
Added 1 month ago
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SnapLogic Support Engineer
W3Global
Canada
- Contract
We are seeking a SnapLogic Support Engineer to provide production support, monitoring, troubleshooting, and maintenance of enterprise integrations built on the SnapLogic platform. The role…
Added 1 month ago
C
Geotechnical Engineer ***Signing Bonus May Apply***
CPKC
Toronto, ON
- Full-time
Becoming a qualified conductor or locomotive engineer is the single best way for a management employee to learn the business at CPKC. You may be required to obtain a certification or to…
Added 1 month ago
C
Geotechnical Engineer ***Signing Bonus May Apply***
CPKC
Calgary, AB
- Full-time
Becoming a qualified conductor or locomotive engineer is the single best way for a management employee to learn the business at CPKC. You may be required to obtain a certification or to…
Added 1 month ago
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Lead Software Engineer
Franklin Templeton
Toronto, ON
- Full-time
Key impact: data accuracy, availability, performance, and cost efficiency
Added 1 month ago
FC
Principal Design Engineer / Structural Lead Engineer - Mining and Metals
Fluor Corporation
Vancouver, BC
- Full-time
Supervise and act as mentor for a junior level designer of junior level engineer.
Added 1 month ago
Software Engineer I
RAM Engineering Ltd.
Vancouver, BC
RAM is looking for a Software Engineer I to join our growing technology team. This is an excellent opportunity for an early-career Software Engineer who already has some professional…
Added 1 month ago
Civil Engineer
Talent Acquisition Team
Edmonton, AB
Professional Engineer (P.Eng.) license in Alberta.
Added 1 month ago
CE
Process Engineer Co-op (STRATOS)
Carbon Engineering Ltd.
Squamish, BC
- $24 to $26 CAD / hour
- Temporary
The Process Engineer Co-op is responsible for supporting engineering activities at Carbon Engineering’s Innovation Centre and Oxy’s STRATOS Carbon Capture Plant. STRATOS is a groundbreaking…
Added 1 month ago
AC
Software Engineer (.NET / C# and AI/IoT)
Artelia Canada
Montreal, QC
- Full-time
As a Software Engineer (.NET / C# and AI/IoT) within the Telecommunications team, you will:
Added 1 month ago
NC
Engineer, Civil/Structural
Newmont Corporation
Vancouver, BC
- Full-time
…future of mining through innovation and strong operational performance. By joining our inclusive, world-class team, you can help shape the future of mining and make a meaningful…
Added 1 month ago
TU
IUOE Millwright
The University of British Columbia
Vancouver, BC
- Full-time
Undertake equipment performance testing and commissioning.
Added 1 month ago
TI
Sr. Analytics Developer
Techtronic Industries Canada Inc.
Toronto, ON
- Full-time
…RYOBI®, and Hoover®, we’re not just about delivering outstanding performance but also about creating exceptional development for our people. If you’re passionate about building your career…
Added 1 month ago
LC
Mechanical Design Engineer- Continuous Improvement
Linamar Corporation
Guelph, ON
- Full-time
Mechanical Design Engineer, Continuous Improvement
Added 1 month ago
Bilingual Data Engineer
CMHC - SCHL
Ottawa, ON · Montreal, QC
Join CMHC’s Information Technology team, in the Bilingual Data Engineer position. You will design, build and support reliable data pipelines and reusable data assets on Azure and…
Added 1 month ago
E
Site Project Manager
Ecolab
Calgary, AB · CAN-Calgary Office Quarry Park
- Full-time
Join CoolIT, an Ecolab Company, a global leader in Direct Liquid Cooling technology for data centers, supercomputers, and high-performance computing environments.
Added 1 month ago
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Senior Full Stack Engineer, Customer & Cardholder Experiences
Marqeta
Remote, Canada
- Full-time
- Remote
We are looking for a Senior Full Stack Software Engineer to join our Customer & Cardholder Experiences team, delivering innovative UIs and embeddable solutions to transform the experience…
Added 1 month ago
Aircraft Maintenance Engineer - Calgary
WestJet Group
Calgary, AB
Looking for the ideal aviation career? Join our highly skilled team as an Aircraft Maintenance Engineer and contribute to the safe and efficient daily maintenance on our fleet of aircraft-…
Added 1 month ago
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Full Stack Developer (Junior/Intermediate)
Reactiv
Toronto, ON
- Full-time
stack engineer in a collaborative, hybrid environment. You don't need to check every box
Added 1 month ago
AI
Manufacturing Engineer
Apex Industries Inc.
Moncton, NB
- Full-time
The Manufacturing Engineer will play a key role in driving operational excellence, continuous improvement, automation, process development, and technology integration across the Aerospace…
Added 1 month ago
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DevOps Engineer
Varonis
Vancouver, BC
- Full-time
The Role: We are seeking an experienced and driven DevOps Engineer to join our join an engineering team whose mission is to make AI secure for the enterprise. We have a cutting‑edge product…
Added 1 month ago
LT
Automation and Build Developer II
LMI Technologies
Burnaby, BC
- Full-time
Join our Software Operations team as a Build & Test Automation Engineer and become the engine behind how our code gets from a developer's keyboard to a sensor on that line.
Added 1 month ago
PD
Senior Software Engineer - Backend
Parallel Domain
Vancouver, BC
- Full-time
We're hiring a Senior Software Engineer to own delivery across this stack. You'll design and build features and services end to end - from API design through to production - and take real…

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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Jobs in Canada

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