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Added 53 mins ago
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Senior Vendor Technology Program Manager
AMD
Markham, ON
- $174,400 to $261,600 USD / year
- Full-time
At AMD, we believe technology has the power to solve the world’s most important challenges. From advancing healthcare and scientific discovery to powering AI and the technologies people…
Added 53 mins ago
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Stage coopératif - Hiver 2027: Développeur BI (4 mois)
CGI
Saguenay, QC
- Full-time
Knowledge of other BI technologies is considered an asset, including SAP BO, Power BI, and Tableau.
Added 1 hour ago
Senior Visualization Professional
Capgemini
Mississauga, ON
The Power BI Lead is responsible for leading the design, development, governance, and support of enterprise reporting and analytics solutions using Microsoft Power BI and Microsoft Fabric.…
Added 1 hour ago
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Sr. Financial Analyst
Brookfield
Toronto, ON
- Full-time
…activities supporting Brookfield’s real estate asset management platform. The candidate requires strong analytical capabilities, process orientation, and the ability to operate effectively…
Added 1 hour ago
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Building Services Design Engineer
Fluor
Vancouver, BC
- Full-time
Estimate HVAC flow rates and equipment power for all areas
Added 1 hour ago
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Software Engineer - Front End
Microsoft
Vancouver, BC
- Full-time
…Synapse Analytics, Azure Service Bus, Azure Event Grid, and Power BI. Our mission is to build the data platform for the age of AI, powering a new class of data-first applications and…
Added 1 hour ago
H
eTrading Full Stack Engineering - Compute
HSBC
Toronto, ON
- Full-time
…including CPU isolation, interrupt request (IRQ) placement, power policy, NUMA locality and network…
Added 1 hour ago
IT
Manufacturing Quality Specialist
Ideon Technologies
Richmond, BC
- Full-time
…tomography, Ideon has developed the REVEAL™ Subsurface Intelligence Platform®, comprising an advanced suite of proprietary data-generation hardware, software, physical AI, and multi-physics…
Added 2 hours ago
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Digital Process Optimization Specialist
BASF
Windsor, ON
- Full-time
…listings and the application process are still hosted on the BASF platform and therefore fully presented in BASF branding. Please do not be confused by this: All roles are positions at…
Added 2 hours ago
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Solutions Architect, EMEA
Baseten
Toronto, ON
- $145,000 to $290,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 2 hours ago
SL
Director, Domain Enterprise Architect, RPA and Intelligent Automation
Sun Life Québec
Montreal, QC
- Full-time
…scope includes RPA, Intelligent Document Processing, Microsoft Power Platform, process mining, workflow orchestration, and Agentic AI capabilities applied to business process…
Added 3 hours ago
DG
Field Support Technician
Deveraux Group of Companies
Calgary, AB
- Full-time
At Deveraux, we’re more than a rental developer. We’re builders of community, connection, and opportunity. With over $2.5 billion in managed assets across Western Canada, we’ve been…
Added 3 hours ago
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KYC Business Insights & Enablement
TD
Toronto, ON · Markham, ON
- Full-time
Advanced Microsoft Excel, including PivotTables, Power Query, Power Pivot, and complex formulas.
Added 4 hours ago
M
Human Capital Data Advisor
MNP
Calgary, AB
- Full-time
Leverage advanced analytics tools such as Power BI and the greater Power Platform to interpret complex datasets and produce detailed reports that support operational and business planning
Added 4 hours ago
AE
D365 Functional Analyst - Human Resources
Associated Engineering
Calgary, AB
- Full-time
Microsoft Dynamics 365 Human Resources, Finance and Operations, Power Platform, or related Microsoft certification is preferred.
Added 4 hours ago
E
Mid-Market Account Executive, Montreal/Quebec City
Elastic
Montreal, QC
- Full-time
…the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to…
Added 4 hours ago
TE
Predictive Insights Business Analyst
TC Energy
Calgary, AB
- Full-time
Microsoft 365, including Teams, SharePoint, Power Platform, and Visio
Added 4 hours ago
Market Research Manager
master-TMS
Toronto, ON
Unlock the power of opportunity. Advance your career in a high-growth environment with a startup feel and strong exposure to leadership and business development. We invest in your…
Added 4 hours ago
AC
Journeyman Carpenter
Ackard Contractors
Edmonton, AB
- Full-time
Valid Fall Arrest and Elevated Work Platform certifications
Added 4 hours ago
NV
Databricks Architect (ID#5473)
New Value Solutions
Vancouver, BC · Greater Vancouver, BC
- Contract
…foundation, with a strong focus on Unity Catalog, data governance, platform security, workspace architecture, storage integration, identity and access management, and production-ready data…
Added 4 hours ago
HW & SW Applications Admin 1
Celestica International LP
Toronto, ON
…core engineering applications environment for the Hardware Platform Solutions (HPS) group. The System Administrator is responsible for the direct operational and technical execution of the…
Added 5 hours ago
RB
Lead Quality Engineer - Data
Royal Bank of Canada
Toronto, ON
- Full-time
Experience in ETL Tools like IICS, Informatica Power Center or similar and ETL scheduler tools
Added 5 hours ago
Technicien de Centre de Données / Data Center Technician, Opérations de centres de données/Data Center Operations
Amazon
Montreal, QC · Varennes, QC
Added 5 hours ago
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Sr. Manager, Global FP&A
''
Toronto, ON
- Full-time
Track innovation and platform performance against approved business cases, highlighting variances, root causes, and corrective actions to business leaders.
Added 5 hours ago
C
HW & SW Applications Admin 1
Celestica
Toronto, ON
- Full-time
…core engineering applications environment for the Hardware Platform Solutions (HPS) group. The System Administrator is responsible for the direct operational and technical execution of the…

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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