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Added 6 days ago
Senior Quality Engineer – Systems Integration
RBC
Toronto, ON
Full-time
The Senior QE - Systems Integration is responsible for creating and executing comprehensive testing strategies and solutions across interconnected enterprise systems: APIs, managed file…
Added 2 days ago
Senior Integration Engineer
Agiloft
Canada
Full-time
We are hiring a Senior Integration Engineer to build and productize integrations between Agiloft and strategic ISV partners. This is a hands-on engineering role with regular partner…
Added 2 days ago
Senior Software Engineer (Front End / Integration), Hospitality Operations Technology
Four Seasons Hotels and Resorts
Toronto, ON · Four Seasons Corporate Headquarters Toronto
Full-time
We are seeking a skilled Software Engineer with a strong background in web UX/UI Developer to design and develop intuitive, user centered digital experiences across the Property Management…
Added 3 days ago
Digital - Integration Engineer / Senior Integration Engineer (Backend & API Platforms)
Aritzia
Vancouver, BC
Full-time
As the Integration Engineer / Senior Integration Engineer (Backend & API Platforms) you will:
Added 3 days ago
Senior Integration Engineer
Infotree Global Solutions
Toronto, ON
Contract
Job Title: Sr Integration Engineer (Intelligent Automation)
Added 4 days ago
Senior Integration and Support Engineer
VitalBio
Oakville, ON
Full-time
You are a cross-disciplinary Senior Integration and Support Engineer with significant experience in in-vitro diagnostics or similarly complex integrated products. You think in terms of…
Added 5 days ago
Senior Integration Engineer (Boomi/Workato)
HeartCentrix Solutions
ON · Ontario, Canada
Contract
We are seeking a Senior Integration Engineer with deep expertise in Boomi and Workato, specializing in payroll and HR system integrations. This role will focus on designing, developing, and…
Added 12 days ago
Senior Data Engineer, Data Integration & Performance Platform (12-Month Contract)
OMERS
Toronto, ON · Head Office Toronto
Full-time
This is a senior engineering role on a multi‑year investment platform transformation that is replacing our core investment book of record with BlackRock Aladdin and building a new cloud…
Added 23 days ago
Senior Systems Integration Engineer
ADGA Group
Ottawa, ON
$135,000 to $150,000 CAD / year
Full-time
ADGA is seeking an experienced Systems Integration Engineer for an immediate opportunity to support an upcoming initiative focused on the development of a new Counter-Uncrewed Aerial…
Added 23 days ago
Senior Systems Integration Engineer
ADGA Group Consultants Inc
Ottawa, ON
$135,000 to $150,000 CAD / year
Full-time
ADGA is seeking an experienced Systems Integration Engineer for an immediate opportunity to support an upcoming initiative focused on the development of a new Counter-Uncrewed Aerial…
Added 19 days ago
Senior Software Engineer (AI Integration & Modernization)
Jonas Software
Markham, ON · Canada - Markham - Ontario
Full-time
We are hiring a Senior Software Engineer to own the design and delivery of production AI capabilities across a broad portfolio of software businesses. You will work directly with product…
Added 27 days ago
Senior Systems Integration Engineer
AtkinsRéalis
Calgary, AB
Full-time
The Senior Systems Integration Engineer is responsible for executing systems engineering and integration activities to ensure that all project systems are effectively coordinated, tested,…
Added 18 days ago
Senior Manager, Data Engineer, Applied AI Data Ingestion & Integration
BMO
Toronto, ON · FCP
Full-time
The Applied AI Data Ingestion & Integration (DII) team provides end‑to‑end services to help move, prepare, and operationalize data for AI and analytics workloads. As a Senior Manager within…
Added 1 month ago
Senior Integration Engineer (Forward Deployed)
ANVIL
Ottawa, ON
Full-time
We're seeking a versatile Senior Integration Engineer to connect our mission-critical software to the systems our defence, public safety, and national security customers depend on. You'll…
Added 1 month ago
Senior Systems Integration Engineer
HDR
Toronto, ON
Full-time
HDR is seeking a Senior Rail Systems Integration Engineer to join our Toronto office. Reporting to the Section Lead - Systems and Operations, you will be part of the larger North America…
Added 1 month ago
Senior Industrial Data Integration Engineer (Digital Thread, OT/IT)
Arcadion
Ottawa, ON
Contract
Seniority: Senior (6+ years enterprise + industrial integration; OT/IT convergence essential) Team fit: Owns the integration layer and data model that feed the twin; the highest-risk…
Added 2 months ago
Senior Systems Integration Engineer [552]
D-Wave
Burnaby, BC
D-Wave is seeking a Senior Systems Integration Engineer to support the development, integration, validation, and continuous improvement of complex quantum computing systems. This role sits…
Added 12 days ago
Senior Quality Engineer – Systems Integration
Royal Bank of Canada
Toronto, ON
Full-time
The Senior QE - Systems Integration is responsible for creating and executing comprehensive testing strategies and solutions across interconnected enterprise systems: APIs, managed file…
Added 2 months ago
Senior Hybrid Powertrain Integration Engineer
AIRO Group Holdings, Inc.
Montreal, QC
$95,000 to $120,000 CAD / year
As a Level 3 Senior Hybrid Powertrain Integration Engineer, you are a core member of the execution tier, responsible for leading the electrical and functional integration of the…
Added 19 days ago
Senior Data Integration Engineer
Connor, Clark & Lunn Financial Group Ltd.
Vancouver, BC
Interested in joining one of Canada's top performing asset managers? We are looking for a Senior Data Integration Engineer for an existing vacancy in our IT department, Connor, Clark & Lunn…
Added 19 days ago
Senior Data Integration Engineer
Connor, Clark & Lunn Financial Group Ltd.
Toronto, ON
Interested in joining one of Canada's top performing asset managers? We are looking for a Senior Data Integration Engineer for an existing vacancy in our IT department, Connor, Clark & Lunn…
Added 4 months ago
Senior Data Integration Engineer
Connor, Clark & Lunn Financial Group (CC&L)
Toronto, Ontario
Full-time
Interested in joining one of Canada's top performing asset managers? We are looking for a Senior Data Integration Engineer for an existing vacancy in our IT department, Connor, Clark & Lunn…
Added 4 months ago
Senior Data Integration Engineer
Connor, Clark & Lunn Financial Group (CC&L)
Vancouver, British Columbia
Full-time
Interested in joining one of Canada's top performing asset managers? We are looking for a Senior Data Integration Engineer for an existing vacancy in our IT department, Connor, Clark & Lunn…
Added 11 days ago
Senior Software Engineer-Integration
PostGrid
Toronto, ON · Greater Toronto Area, Canada
Full-time
As a Senior Software Engineer on the Integrations team, you will be a key contributor to our integrations, responsible for both technical leadership and hands-on development. You'll build…
Added 22 days ago
Senior Mechanical Engineer - Rail Systems and Building Integration - Magog, Canada
Arjo
Magog, QC
We are seeking a passionate Senior Mechanical Engineer with a strong interest in product design and complex technical challenges to contribute to the development of our rail systems,…

PostGrid

Senior Software Engineer-Integration

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Job type: Full-time
Apply by: Mar 8, 2027
Experience: 5+ years of software engineering experience as full stack with a strong focus on integrations, APIs, or platform engineering.
Posting language: English
Posted: Sep 9, 2026

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Applications open in a new tab.

Original job description

About PostGrid:

PostGrid helps businesses and developers connect the digital and physical worlds. Our robust APIs empower organizations to create, personalize, and dispatch physical mail to any address on the globe without ever touching an envelope, while ensuring clean address data. Operating at a massive scale across multiple regions, we’re redefining how businesses connect with people beyond the inbox. If you’re driven to build category-defining technology and want to shape the future of offline communications, join our high-calibre team and help us transform the way the world sends mail.

About The Team:

The Engineering team is the heartbeat of our company. We are a passionate group of builders and innovators dedicated to solving complex problems and creating elegant, scalable solutions. We thrive on technical challenges, from architecting robust services to optimizing performance for a global user base. We believe in collaborative code reviews, a culture of continuous learning, and owning our projects from conception to deployment.

What you’ll do:

As a Senior Software Engineer on the Integrations team, you will be a key contributor to our integrations, responsible for both technical leadership and hands-on development. You'll build the critical backend and frontend systems that allow our customers to use our product without leaving their stack. This role requires a pragmatic fullstack software engineer who can contribute to all stages of the software development lifecycle, from architectural design to implementation and ongoing maintenance.

Your Responsibilities:

Full-Stack Development: Build and enhance integration services using TypeScript, NodeJS, MongoDB, and React, AWS, Terraform with a strong emphasis on modern software engineering best practices.
API Development: Design and iterate on REST APIs and infrastructure that handle over one billion requests monthly, ensuring they are robust, reliable, and integration-ready.
Platform Integrations: Develop and maintain the integration layer between PostGrid's core platform and third-party ecosystems. This includes designing scalable data pipelines for CRM and ERP platforms, debugging and resolving integration failures at the API and data layer, and engineering internal tooling to automate partner onboarding and system monitoring.
Partner & Integration Advocacy: Own the technical relationship with key integration partners. This includes reviewing integration architecture, identifying failure points and reliability risks, and driving engineering solutions internally to expand integration coverage, improve uptime, and ensure long-term stability across all connected platforms.

What Will You Bring To This Role:

Minimum Requirements:

5+ years of software engineering experience as full stack with a strong focus on integrations, APIs, or platform engineering.
Strong proficiency in TypeScript, NodeJS, MongoDB
Experience with scalable architecture, high load applications
Hands-on experience building integrations with CRM/ERP platforms and other 3rd-party systems and internal platforms
Solid understanding of REST APIs, webhook patterns and event-driven systems

Nice to have:

Experience with MongoDB in a multi-tenant SaaS environment.
Experience with programming languages like Rust to solve performance-intensive engineering challenges and tasks

What we offer:

Deep architectural control with a role in shaping the company’s critical platform integrations.

Professional development opportunities, including mentorship from senior leaders and access to advanced training programs.

A collaborative environment focused on achieving excellence and driving innovation.

Our Commitment to Diversity:

PostGrid is an equal opportunity employer and values the diversity of backgrounds and perspectives. We strive to cultivate an inclusive environment of understanding to have a greater impact on our business and our customers. We encourage applicants from underrepresented groups and do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or criminal history, in accordance with applicable local, state, and/or federal laws.

Ready to make your mark?

Join PostGrid’s tight-knit, high-energy team and build technology that powers global offline communication. With competitive pay, flexible work, and a learning-obsessed culture, you’ll ship bold ideas fast and see your impact instantly. Hungry for a challenge? Apply today and help us reinvent how the world connects beyond the inbox.

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More about this job

Responsibilities

Lead the development of full-stack integration services and REST APIs to connect PostGrid's platform with third-party CRM and ERP ecosystems. Manage technical relationships with integration partners to ensure system stability, reliability, and expanded coverage.

Requirements

Requires over 5 years of full-stack software engineering experience with strong proficiency in TypeScript, NodeJS, and MongoDB. Candidates must have a proven track record of building scalable integrations and working with high-load applications.

Skills

TypeScript
NodeJS
MongoDB
React
AWS
Terraform
REST APIs
Full-Stack Development
Platform Engineering
CRM Integration
ERP Integration
Event-Driven Systems
Webhook Patterns
Scalable Architecture
Rust

Benefits

Professional Development Opportunities
Mentorship From Senior Leaders
Advanced Training Programs
Flexible Work

Visa sponsorship

Not detected in the job text

Keywords

TypeScript
NodeJS
MongoDB
React
AWS
Terraform
REST APIs
CRM
ERP
SaaS
Rust
Event-Driven Architecture
Webhooks
Full-Stack
Platform Engineering
Scalable Architecture
API Design
Data Pipelines
Multi-tenant

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