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Added 1 day ago
E
React Native Developer
Experis
Toronto, ON
- $65 to $75 CAD / hour
- Contract
Seeking an experienced Engineering Lead / Senior Full-Stack Developer to join a high-performing team delivering modern web and mobile applications. The successful candidate will combine…
Added 1 day ago
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Sr. Flutter Engineer
Telna
ON · Ontario, Canada
- Full-time
You will be a senior technical owner of our Flutter mobile platform, which powers consumer travel eSIM apps and white-labeled apps for mobile network operators. Flutter is our primary stack…
Added 1 day ago
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Sr. Angular Engineer
Telna
ON · Ontario, Canada
- Full-time
You will be a senior technical owner of our Angular web platform, which powers consumer travel eSIM storefronts and white-labeled web experiences for mobile network operators. Our web…
Added 1 day ago
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Sr. Backend Engineer - Node.JS
Telna
ON · Ontario, Canada
- Full-time
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…
Added 1 day ago
R
iOS Senior Developer - OTT Team (French Services) (Telework/Hybrid)
Radio-Canada
Montreal, QC
- Full-time
Added 1 day ago
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Android Senior Developer - OTT Team (French Services) (Telework/Hybrid)
Radio-Canada
Montreal, QC
- Full-time
Added 1 day ago
TC
AI -Senior Mobile Engineering Specialist
Tata Consultancy Services
Montreal, QC
- $100,000 to $120,000 CAD / year
- Full-time
Good Years of experience in mobile device management, working at senior engineer level
Added 1 day ago
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Android Senior Developer - OTT Team (French Services) (Telework/Hybrid)
CBC/Radio-Canada
Montreal, QC
- Full-time
Added 1 day ago
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Technical Scrum Master
INFOYA
Toronto, ON
- $70,000 to $80,000 CAD / year
- Full-time
Work Arrangement: Hybrid (2 days in office per week)
Added 1 day ago
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National Account Manager
Guardteck Security Corp.
Mississauga, ON
- $120,000 to $140,000 CAD / year
- Full-time
…significant national retail relationships across Canada. This is a senior, Toronto-based role with a high executive profile, split roughly 60% national account leadership and service…
Added 1 day ago
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Digital UAT, Menu and Pricing Coordinator
KFC
Vaughan, ON
- Full-time
This role must have…
Added 1 day ago
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Senior QA Engineer
Hays
Vancouver, BC
- Contract
The client’s digital team is looking for a Senior QA Engineer with experience across our in-store Point-of-Sale (POS) and mobility stack, including Oracle Xstore and Xmobile, to support…
Added 1 day ago
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Technical Analyst
Kyndryl
Regina, SK · Victoria, BC
- Full-time
Recommends (to senior staff) appropriate technical and/or procedural solutions to meet client needs.
Added 1 day ago
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iOS Senior Developer - OTT Team (French Services) (Telework/Hybrid)
CBC/Radio-Canada
Montreal, QC
- Full-time
Added 1 day ago
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Project Manager
Modern Niagara
Burnaby, BC
- Full-time
Our Senior Project Managers are critical to the success of Modern Niagara's major projects portfolio. Their leadership ensures complex projects are delivered safely, on time, and within…
Added 1 day ago
National Client Success Account Manager
Kandor
Mississauga, ON
…significant national retail relationships across Canada. This is a senior, Toronto-based role with a high executive profile, split roughly 60% national account leadership and service…
Added 1 day ago
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Software Engineer, Design Systems & AI Tooling
Citi
Mississauga, ON
- Full-time
…build, scale, and integrate the next generation of AI-powered developer tools, design systems, and data…
Added 1 day ago
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Mobile Engineer
VySystems
Canada
- Full-time
We are seeking a highly skilled and experienced Principal Mobile Engineer (Lead / Architect)in Montreal, QC with strong background in mobile application development and architecture, with…
Added 1 day ago
AW
Healthcare Business Development Consultant
Arrow Workforce Solutions
Mississauga, ON
- $55,000 to $60,000 CAD / year
- Full-time
Must have a valid driver's license and access to their own reliable vehicle
Added 1 day ago
GC
Senior Machine Learning Programmer
Game Companies
Montreal, QC
- Full-time
…build high-fidelity, interactive experiences for PC, console, mobile, and VR, it is also a tool being embraced by content creators across a variety of industries such as media and…
Added 1 day ago
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Coordonnateur, Services aux locataires / Coordinator, Tenant Services
BGO Real Estate
Montreal, QC
- Full-time
Added 1 day ago
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Manager, Customer Experience Trainee - Montreal Ouest
TD
Dollard-Des Ormeaux, QC
- Full-time
· Support the frontline staff in resolving complaints as per customer problem resolution guidelines; encourage senior team members to act as a point of escalation and take personal…
Added 1 day ago
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Vehicle Inspection Manager
OPENLANE
Toronto, ON · Brampton, ON · CAN - ON - Brampton (Toronto)
- $95,000 CAD / year
- Full-time
Must possess aptitude for reporting and analyzing data (inventory, financial and operational in nature) accurately and quickly
Added 1 day ago
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Vehicle Inspection Manager
OPENLANE
Brampton, ON
- $90,000 to $100,000 CAD / year
- Full-time
Must possess aptitude for reporting and analyzing data (inventory, financial and operational in nature) accurately and quickly
Added 1 day ago
KP
Front-End Development for Interactive Applications (FDIT) Instructor - Competition ID: 4877
Kwantlen Polytechnic University
Richmond, BC
- Part-time
…The curriculum in this Diploma program introduces students to mobile and software contexts while focusing on responsive web design and frameworks, and web development best practices and…

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