Jobs in Canada

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Added 19 hours ago
SM
RQ11874 – Specialized IT Consultant – Senior
S M Software Solutions Inc
Toronto, ON
- Full-time
Work Arrangement: Onsite – 5 Days per Week
Added 22 hours ago
A
Senior Software Developer
Autodesk
Toronto, ON
- Full-time
Mentoring and leading junior members to contribute on project goals.
Added 1 day ago
SL
Senior Data Engineer
Sun Life
Toronto, ON · Waterloo, ON · Sun Life Toronto One York
- Full-time
Candidates must have relevant experience in the following areas:
Added 1 day ago
A
Senior Software Developer
Autodesk
Toronto, ON
- Full-time
Mentoring and leading junior members to contribute on project goals.
Added 1 day ago
SM
RQ11874 – Specialized IT Consultant – Senior
S M Software Solutions Inc
Toronto, ON
- Full-time
Work Arrangement: Onsite – 5 Days per Week
Added 1 day ago
T
Sr. Backend Engineer - Node.JS
Telna
ON · Ontario, Canada
- Full-time
Lead code reviews, write technical design documents, and mentor junior and mid-level engineers.
Added 1 day ago
I
Systems Analyst - Intermediate
isgSearch
Toronto, ON · Greater Toronto Area, Canada
- Contract
Provide technical leadership and guidance to development teams and junior analysts.
Added 1 day ago
K
FULLSTACK ENGINEER
Kablamo
Toronto, ON
- Full-time
Guide and assist junior engineers during onboarding and daily development activities.
Added 1 day ago
AI
Pega Technical Lead
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Mississauga, ON
- Full-time
Design, develop, test, and maintain enterprise-grade Java applications.
Added 1 day ago
M
RQ11882 - Systems Analyst - Intermediate
Maarut
Toronto, ON
- Contract
Provides coaching and direction to junior analysts
Added 1 day ago
M
RQ11874 - Specialized IT Consultant - Senior
Maarut
Toronto, ON
- Contract
scalable, and secure REST APIs built using Java and Spring Boot, adhering
Added 1 day ago
M
RQ11883 - Systems Analyst - Intermediate
Maarut
Toronto, ON
- Contract
Provides coaching and direction to junior analysts
Added 1 day ago
GM
Senior Java Microservices Engineer
Galactic Minds INC
Vancouver, BC
- Full-time
Provide technical mentorship and guidance to junior developers, promoting best practices in Java, microservices architecture, and software engineering.
Added 1 day ago
ST
Junior Software Engineer – Full-Stack Development & AI Integration
SynMatrix Technologies Inc.
Richmond Hill, ON
- Full-time
Must have graduated or be scheduled to graduate in 2026
Added 1 day ago
V
Senior Software Engineer
Veem
Ottawa, ON
- Full-time
Hands-on experience as a back-end Java developer, specializing in building highly available scalable systems
Added 1 day ago
C
Senior Java Developer - Assistant Vice President
Citi
Mississauga, ON
- Full-time
We are seeking an experienced and motivated Senior Java Developer to spearhead the development of robust, scalable, and innovative enterprise applications. The ideal candidate will possess…
Added 1 day ago
V
Senior Software Engineer
Veem
Ottawa, ON
- Full-time
Hands-on experience as a back-end Java developer, specializing in building highly available scalable systems
Added 1 day ago
VL
Lead QA Engineer
VStream Labs Inc.
Toronto, ON
- Contract
Proficiency in Java, Python, JavaScript, or TypeScript.
Added 1 day ago
SD
Systems Analyst
Symbiotic Digital
ON · Downtown Toronto (Central Bay Street), Ontario
- Contract
and provide guidance to junior team members throughout project delivery.
Added 1 day ago
O
Staff Product Security Engineer, Reviews
Okta
Toronto, ON
- $141,000 to $193,000 CAD / year
- Full-time
Mentor junior engineers and provide guidance to non-security staff on secure development practices.
Added 1 day ago
B
Bilingual Senior Specialized IT Consultant – Java / Spring Boot / Angular
Bevertec
Toronto, ON · Greater Toronto Area, Canada
- Contract
We are seeking a Senior Java Full Stack Developer to support the development of a secure, bilingual notification platform for Justice Technology Services. The MAG Notify App will provide…
Added 1 day ago
AR
Senior Machine Learning Engineer
Apple Retail Shop
Cambridge, ON
- Full-time
Mentor junior MLEs on the team to ensure best practices are followed.
Added 2 days ago
C
Senior Java Full Stack Developer (Angular)
CGI
Canada
- Full-time
…growing team. In this role, you will leverage your expertise in Java, Spring Boot, Microservices, Angular, AWS, and cloud-native technologies to design, develop, and deliver scalable…
Added 2 days ago
MU
Java Engineer – Azure
Matrix USA
Toronto, ON
- Full-time
We are seeking a talented and motivated Java Engineer with strong experience in the Microsoft Azure ecosystem to join our growing engineering team. In this role, you will be responsible for…
Added 2 days ago
MC
Senior QA Engineer III – Automation | Banking | API | Kafka | ETL (35729)
Myticas Consulting
Ottawa, ON
- Full-time
Automate API workflows, backend validations, and data-processing scenarios using Java or Python.

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.

Apply on LinkedIn About employer

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