Jobs in Canada

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Added 59 mins ago
SJ
Registered Nurse Mental Health - Short Stay Unit
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Toronto, ON
- Temporary
Ability to type notes and access/navigate hospital electronic systems for the provision of care to patients.
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TC
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- Contract
Knowledge of content management systems, preferably SharePoint.
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- Full-time
Added 59 mins ago
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Sr. Flutter Engineer
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- Full-time
Define API contracts with backend teams, and design analytics and event schemas so transaction and behavioral data reconcile cleanly across systems.
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Assistant Supervisor Engineering Flagging-CA
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Bachelor's degree or foreign equivalent in Computer Science, Information Systems, or a related field.
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NB
Security Guard {NU C-26-061}
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- $31.18 to $38.97 CAD / hour
- Full-time
Facility monitoring via Video Management System and Access Control systems
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…pumps, blowers, valves, generators, VFDs and packaged engineered systems for industrial, mining, and municipal applications across Eastern…
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Automation Technician
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Conduct preventative and predictive maintenance on electrical and instrumentation systems, documenting findings and corrective actions.
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Security Guard {NU C-26-049}
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Added 59 mins ago
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Sr. Backend Engineer - Node.JS
Telna
ON · Ontario, Canada
- Full-time
…that are correct under failure, integrate with many external systems (payment providers, carrier and eSIM platforms, CRM and marketing tools), and shape how we onboard each new operator…
Added 59 mins ago
NB
*NEW* Protective Services Guard {NU C-26-063}
North Bay Regional Health Centre (NBRHC)
North Bay, ON
- $31.18 to $38.97 CAD / hour
- Full-time
Facility monitoring via Video Management System and Access Control systems
Added 59 mins ago
NB
Supervisor {NU C-26-062}
North Bay Regional Health Centre (NBRHC)
North Bay, ON
- $48.49 to $60.62 CAD / hour
- Full-time
Experience with ERP systems (e.g., Meditech Expanse) and patient billing systems is preferred, as well as proficiency in Microsoft Excel and other Microsoft Office applications
Added 59 mins ago
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Senior Backend Engineer, LLM Systems
CleverConsult
Canada
- Full-time
You must be based in Canada
Added 59 mins ago
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Refrigeration A Certificate - Senior Refrigeration Technician
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Brampton, ON
- $39.47 to $46.5 CAD / hour
- Full-time
Conducts testing of ammonia systems as per TSSA safety requirements and carries out ammonia equipment and system preventative maintenance according to prescribed schedules.
Added 59 mins ago
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Home and Electronics Sales Associate
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Saint-Gabriel-de-Valcartier, QC
- Part-time
…services, and postal services. You will operate Point of Sales systems, the debit/credit machine, and maintain a float. You may take and prepare food and beverage orders and prepare takeout…
Added 59 mins ago
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Advanced DevOps Engineer - EA Sports Technology
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- Full-time
…results. You have demonstrated success working with large scale systems, prioritizing competing initiatives, and maintaining a strong focus on uptime and predictability. You are passionate…
Added 59 mins ago
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Conservation Land Negotiator
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Added 59 mins ago
T&
Finance Manager, Financial Accounting & Reporting
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Toronto, ON
- Full-time
Implement and maintain robust internal control systems to safeguard company assets (SOX)
Added 59 mins ago
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Manager 2, Finance
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- Full-time
Expertise with accounting and billing software or systems, and third party software vendors. Experience working with health records.
Added 59 mins ago
WI
Lead, Global People Analytics
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- Full-time
Lead data-validation and reconciliation activities to confirm that analytical results align with source systems and approved business requirements.
Added 59 mins ago
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Parts Advisor - Northland Hyundai
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- $23 to $25 CAD / hour
- Other
Must possess a valid Ontario driver's license and have a safe driving history
Added 59 mins ago
R-
Keyholder (Part time) - ERIN MILLS
RCL - Reitmans Canada Ltd/Ltée
Mississauga, ON
- Part-time
Proficient in POS, ERP, ATS systems and Microsoft Office Suite.

Telna

Sr. Backend Engineer - Node.JS

ON, Canada
Ontario, Canada, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Dec 10, 2026
Posting language: English
Posted: Nov 10, 2026

Original job description

About Telna

Telna is a global connectivity company that provides eSIM, IoT and mobile network technology to travel brands, mobile network operators and enterprises. Our engineering team builds the platforms and services that let millions of people get connected in seconds, wherever they are in the world.

About the Role

You will be a senior technical owner of the backend services behind our eSIM products. These services power consumer travel eSIM apps and white-labeled apps and web experiences for mobile network operators, all built on a shared multi-tenant platform. They cover catalog and pricing, checkout and payments, order and eSIM lifecycle management, customer data, fraud and risk controls, and the data feeds that analytics and finance teams depend on.

This is a hands-on role with significant architectural influence. You will design services that are correct under failure, integrate with many external systems (payment providers, carrier and eSIM platforms, CRM and marketing tools), and shape how we onboard each new operator onto the platform. You will set backend standards for the team, mentor engineers across experience levels, and work directly with product, frontend, mobile, data and QA.

What You'll Do

Design, build and operate backend services and APIs in Node.js and TypeScript for catalog, pricing, checkout, orders, eSIM provisioning and usage management.
Evolve our multi-tenant platform so that each new operator or partner can be onboarded through configuration rather than new code, with per-tenant pricing, branding, feature flags, payment methods and data isolation.
Build and maintain payment integrations for a range of regional providers, including card processors, mobile money and local gateways. Own idempotency, webhook handling, retries, refunds and reconciliation, so that money movement is correct even when providers fail or repeat callbacks.
Integrate with carrier and eSIM provisioning platforms and other third-party systems, wrapping unreliable external APIs in clear contracts with timeouts, circuit breakers, queues and replay.
Own pricing and configuration services, including database-backed pricing rules that product teams can change without a deployment.
Build fraud and abuse prevention capabilities in the backend: risk scoring, velocity and coupon-abuse checks, payment-failure monitoring and review workflows.
Design transaction-level data flows so that payment, CRM, analytics and email platform records share consistent identifiers and reconcile cleanly. Work with data and BI teams on event pipelines, warehouse models and reporting accuracy.
Expose well-documented, versioned APIs to web and mobile clients, and to partner and agent-facing channels such as messaging platforms and AI assistants (for example through MCP-style connectors).
Drive reliability and performance: observability, alerting, load testing, query tuning, caching and capacity planning.
Set the standard for testing: unit, integration and contract tests, and automated checks in CI/CD.
Lead code reviews, write technical design documents, and mentor junior and mid-level engineers.
Evaluate tools, services and patterns, and make pragmatic build-vs-buy decisions.

What You'll Bring

Required

7-8 years of professional backend development, with 6+ years of production Node.js and TypeScript (NestJS, Express, Fastify or similar) on systems with real traffic and real money flowing through them.
Strong command of API design: REST (and GraphQL where relevant), versioning, pagination, authentication and authorization (OAuth2, JWT, API keys), rate limiting and clear error contracts.
Deep experience with relational databases (PostgreSQL or MySQL): schema design, indexing, query tuning, transactions, migrations and safe changes to live tables. Working knowledge of Redis or similar for caching and queues.
Proven experience integrating payment providers, with a solid grasp of idempotency, webhooks, reconciliation, refunds and PCI-conscious design.
Experience building multi-tenant or white-label systems, including configuration-driven behavior and tenant isolation.
Experience designing for failure in distributed systems: asynchronous processing, message queues, retries with backoff, dead-letter handling and exactly-once-in-effect semantics.
Strong testing discipline: unit, integration and contract testing, with tests that run in CI on every change.
Experience with cloud infrastructure (AWS or similar), containers, CI/CD pipelines and infrastructure as code.
Production observability experience: structured logging, metrics, tracing and on-call practice.
Solid grasp of application security: input validation, secrets management, secure handling of personal and payment data.
Proven ability to mentor engineers, lead technical decisions and communicate with product and business stakeholders, including customers when integration requirements need to be clarified.

Strongly Preferred

Experience with eSIM, SIM or telecom systems, such as SM-DP+ and carrier provisioning APIs, or with operator (MNO) integrations.
Experience with fraud, risk or abuse-detection systems, including rules engines and scoring.
Experience with data warehouses and BI tooling (for example Redshift, Trino or Metabase), and with SQL at analytical scale.
Experience reconciling data across payment, CRM, analytics and marketing platforms.
Experience building event-driven systems with Kafka, SQS/SNS or similar.
Experience with Python, Go or Java alongside Node.js.
Experience building APIs for AI assistants or agent-driven commerce, including MCP connectors and messaging channels such as WhatsApp.
Experience with Kubernetes or serverless platforms.
Prior experience in travel, fintech, e-commerce, telecom or connectivity products.

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More about this job

Responsibilities

Design, build, and operate Node.js and TypeScript backend services for eSIM products, including multi-tenant catalog, pricing, checkout, payments, orders, provisioning, and usage management. Lead architecture and reliability practices, integrations, testing, technical reviews, and mentoring while collaborating with product, engineering, data, and QA teams.

Requirements

Requires 7–8 years of backend development, including at least 6 years with production Node.js and TypeScript, plus strong experience with APIs, relational databases, payment integrations, multi-tenant systems, and distributed-system reliability. Candidates should also bring cloud, CI/CD, testing, observability, and security experience, along with the ability to mentor engineers and communicate technical decisions to stakeholders.

Skills

Node.js
TypeScript
Backend Architecture
API Design
PostgreSQL
Payment Integrations
Multi-Tenant Systems
Distributed Systems
Testing
AWS
CI/CD
Observability
Application Security
Fraud Prevention
Mentoring
eSIM Provisioning

Visa sponsorship

Not detected in the job text

Keywords

Node.js
TypeScript
NestJS
Express
Fastify
REST
GraphQL
PostgreSQL
MySQL
Redis
Payment Providers
Webhooks
Idempotency
Multi-Tenant Platforms
eSIM
SM-DP+
Carrier Provisioning
AWS
Docker
CI/CD
Infrastructure as Code
Kafka
SQS/SNS
Kubernetes
Fraud Detection
Event Pipelines
Data Warehouses
OAuth2
JWT
Observability

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Jobs in Canada

Registered Nurse Mental Health - Short Stay Unit

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Home and Electronics Sales Associate

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Lead, Global People Analytics

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Keyholder (Part time) - ERIN MILLS

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Work requirements

Jobs in Canada