Find work in Canada.

326,484 jobs across our Canadian network. How we count

Jobs in Canada

25+ jobs

Email me new jobs Save this search

Added 1 hour ago
Linux Security Engineer
Zodiac Solutions, Inc
Toronto, ON
Full-time
· Familiarity with DevOps and CI/CD practices, including tools such as GitHub, Harness, and Tekton for source
Added 1 hour ago
Senior Infrastructure Engineer
Upstart
Canada
The Data Platform Engineering team (Part of Upstart's Decisioning & Data) provides developer tools, frameworks, and scalable data infrastructure as shared services across Upstart. The…
Added 1 hour ago
Senior DevOps Engineer - Digital Platforms
Four Seasons Hotels and Resorts
Toronto, ON · Four Seasons Corporate Headquarters Toronto
Full-time
The Senior DevOps Engineer - Digital Platforms is a senior, hands-on technical role accountable for advancing the reliability, scalability, security, performance, and operational maturity…
Added 2 hours ago
Senior Quality Engineer
IT Connex
Toronto, ON
Contract
Develop automation using Selenium, Postman, UFT, TestComplete, or similar tools.
Added 2 hours ago
Senior Data Engineer
Royal Bank of Canada
Vancouver, BC
Full-time
…part of our digital transformation strategy. We're seeking a Senior Data Engineer to architect and build scalable, cloud-native ETL/ELT pipelines that power our enterprise data ecosystem.…
Added 3 hours ago
Senior Data Engineer
RBC
Vancouver, BC
Full-time
…part of our digital transformation strategy. We're seeking a Senior Data Engineer to architect and build scalable, cloud-native ETL/ELT pipelines that power our enterprise data ecosystem.…
Added 4 hours ago
Senior Developer Engineer/Leader
Xcelerated Consulting Group, LLC.
Montreal, QC
Contract
DevOps & Build Automation: Drive efficient delivery pipelines by leveraging DevOps methodologies and tools - Jenkins for CI, Maven for build management, Artifactory for artifact management,…
Added 9 hours ago
Lead Data Engineer
National Bank of Canada
Montreal, QC
Full-time
Knowledge of Amazon Web Services, Snowflake, Terraform and collaborative development tools, as well as DevOps practises, automation, automated testing and continuous integration and…
Added 18 hours ago
Senior DevOp Engineer
MarkiTech.AI
Toronto, ON
$70 to $85 CAD / hour
Contract
We are hiring a senior DevOps engineer to own and evolve our cloud platform on AWS, grounded in infrastructure as code, secure multi-account patterns, and reliable delivery. You will shape…
Added 21 hours ago
Senior Quality Assurance Automation Engineer
Tekgence Inc
Montreal, QC
Contract
Contribute to DevOps automation and improvements.
Added 22 hours ago
Data Pipeline QA
Insight Global
Toronto, ON
$50 to $65 CAD / hour
Contract
Insight Global is looking for a Senior QA Automation Engineer to join a high-performing team focused on data pipeline validation and reporting quality. This individual will be responsible…
Added 23 hours ago
Lead AI engineer
Hays
Halifax, NS
$150,000 to $175,000 CAD / year
Full-time
…learning, generative AI, document intelligence, and intelligent automation solutions. This role combines people leadership, technical strategy, hands-on engineering oversight, and…
Added 23 hours ago
Senior Cryptographic Protocol Engineer
SuperQubit Inc.
Markham, ON
Full-time
Job Title: Senior Cryptographic Protocol Engineer
Added 23 hours ago
Digital Technical Delivery Lead
Raise
Calgary, AB
Contract
The Senior Digital Technical Delivery Lead will report into an enterprise Digital Program and focuses on leading delivery teams in the planning, design, development in support of the…
Added 1 day ago
Manager - Release, Configuration & Environment Management
Hays
Toronto, ON
Contract
…significant technology transformation, focused on modernizing software delivery, strengthening governance, and improving operational resilience. As part of a growing Technology…
Added 3 days ago
Power Platform & Copilot Studio Architect
Softchoice
Calgary, AB · AB · NS · Oakville, ON · Ottawa, ON · Toronto, ON · Nova Scotia, Nova
…outcomes. We do this through the delivery of secure cloud, AI, software and digital workplace solutions that enable agility, innovation and…
Added 3 days ago
Senior AI Full‑Stack Engineer
Manulife
Waterloo, ON
Full-time
We are seeking a Senior Full‑Stack AI Engineer to help shape how modern AI‑driven software is built, deployed, and scaled. In this role, you will work at the intersection of cloud…
Added 3 days ago
Team Lead, AI Engineering
The Citco Group Limited
Halifax, NS
Full-time
…financial services industry. Our AI Engineering teams use modern software engineering practices, AI-assisted development, and cross-functional collaboration to deliver reliable solutions…
Added 3 days ago
IT Senior Analyst, Power BI Development – Enterprise Analytics
Saputo Inc.
Mississauga, ON
Full-time
Engineer high‑quality semantic models (datasets) optimized for performance, reusability, and enterprise reporting
Added 3 days ago
IT Senior Analyst, Power BI Development – Enterprise Analytics
Saputo Inc.
Montreal, QC
Full-time
Engineer high‑quality semantic models (datasets) optimized for performance, reusability, and enterprise reporting
Added 3 days ago
Senior Forward Deployment Engineer
Luxoft
Mississauga, ON
Full-time
The role combines senior software engineering, DevOps, SRE, test automation, application security, and legacy modernization. Approximately 70% of the work involves hands-on coding and…
Added 3 days ago
Cloud Data Platform Engineer
Canadian Tire Corporation
Toronto, ON
Full-time
The successful candidate will bring advanced hands-on expertise in Terraform, PowerShell, ADO (Azure DevOps), CI/CD, branching strategies, infrastructure-as-code, cloud automation, and…
Added 3 days ago
Technical Consultant III (35732)
Myticas Consulting
Toronto, ON
Full-time
Technical Consultant III (Software Engineer, Senior/Lead)
Added 3 days ago
Senior QA Engineer III – Automation | Banking | API | Kafka | ETL (35729)
Myticas Consulting
Ottawa, ON
Full-time
You are a hands-on senior QA automation engineer who can go beyond executing existing test scripts. You can design frameworks, understand complex backend integrations, trace data across…
Added 4 days ago
Director, Data Engineering, International Banking, Toronto, Mexico, Colombia, Peru
Scotiabank
Toronto, ON
The Director, DataOps is a senior technology leadership role accountable for the operational excellence, reliability, security, scalability, and cost efficiency of the Azure Databricks…

SuperQubit Inc.

Senior Cryptographic Protocol Engineer

Markham, ON, Canada

Job type: Full-time
Apply by: Oct 23, 2026
Experience: 5+ years of professional software engineering experience, with significant work in systems, networking, cybersecurity, or cryptographic software
Posting language: English
Posted: Aug 27, 2026

Apply About employer

Applications open in a new tab.

Original job description

Job Title: Senior Cryptographic Protocol Engineer

Office Location: 7303 Warden Ave. Markham, ON

Employment Type: Full‑time

Application Email: careers@superqubit.ai

We are building a novel secure data-encryption protocol around key material generated by our Quantum Key Distribution infrastructure - not another AES wrapper, but a new cryptographic construction designed specifically around what QKD-derived keys make possible. We need someone who can take that specification from idea to a production-grade, battle-tested Rust implementation running between geographically distributed nodes.

About The Role

The successful candidate will work closely with our technical team to translate a defined cryptographic protocol into a robust, secure, and production-quality implementation.

Rust will be the primary implementation language, but this is a systems and network-security role rather than a conventional application-development position. The ideal candidate has strong experience across cryptography, secure networking, systems programming, distributed systems, and security-sensitive software development.

You do not need to be a QKD expert. Our team will provide the necessary background on QKD, the existing infrastructure, and how shared key material is made available between nodes. Your job is to understand the protocol specification, design its software architecture, implement it securely, and integrate it with the surrounding communications infrastructure.

Responsibilities

Implement a novel cryptographic protocol based on a defined protocol specification.
Design and develop the core implementation primarily in Rust.
Design secure interfaces between the cryptographic protocol and the underlying QKD key-management infrastructure.
Develop mechanisms for securely consuming, managing, rotating, and tracking shared key material between communicating nodes.
Design and implement protocol state machines, session management, key lifecycle management, and error handling.
Integrate the protocol with existing networking and application infrastructure.
Implement protections against protocol-level attacks - replay, message manipulation, key reuse, state confusion, and related threats.
Develop comprehensive unit, integration, interoperability, performance, and security tests.
Analyze protocol behavior under failure conditions: lost messages, node restarts, key exhaustion, synchronization problems, network interruptions.
Document protocol implementation, interfaces, assumptions, security-sensitive design decisions, and operational procedures.
Participate in security reviews alongside cryptography and QKD specialists.
Profile and optimize for performance, latency, memory usage, concurrency, and efficient key consumption.
Troubleshoot systems and networking issues across geographically distributed nodes.
Travel between project sites and QKD/network infrastructure located in different cities as required.

Programming Languages

Required

Rust - systems, networking, or security-sensitive software
C/C++ - systems programming, integration with existing libraries
Python - automation, testing, tooling, crypto prototyping
Bash / Linux shell scripting

Preferred

Go
Java or C# - for integration with existing infrastructure
Rust FFI and integration between Rust and C/C++ libraries

Cryptography & Security

Required

Strong understanding of applied cryptography and cryptographic protocols, and experience implementing security-sensitive software, with a solid grasp of:

Symmetric cryptography
Key management and key lifecycle
Key derivation and key separation
Authentication and integrity
Randomness and entropy
Nonces, initialization vectors, and counters
Replay protection
Secure session establishment
Protocol state machines

Plus a working understanding of threat modeling, secure software design, and the ability to identify security risks in protocol implementations.

Preferred

Experience with cryptographic protocol design or implementation
Experience reviewing cryptographic implementations
Experience with cryptographic libraries and APIs
Experience with HSMs, secure enclaves, or other key-protection technologies
Familiarity with formal methods, protocol verification, or cryptographic security analysis
Familiarity with post-quantum cryptography
Experience with QKD or quantum communications

Systems & Computer Engineering

Strong understanding of Linux operating systems
Experience with processes, threads, concurrency, synchronization, and memory management
Experience developing multithreaded and asynchronous software
Strong understanding of computer networking and networking stacks
Experience with performance profiling, debugging, and optimization
Understanding of hardware/software interfaces
Experience troubleshooting systems at both software and OS levels

Networking & Distributed Systems

Strong understanding of TCP/IP and UDP networking
Experience with IPv4/IPv6, Ethernet, sockets, routing, and network troubleshooting
Experience designing or implementing network protocols
Experience with distributed systems and inter-node communication
Understanding of network latency, reliability, synchronization, and failure recovery
Experience with secure network communications
Familiarity with TLS, QUIC, IPsec, WireGuard, or the Noise Protocol Framework is an asset
Experience using Wireshark, tcpdump, and standard Linux networking tools

Software Engineering & DevOps

Strong experience with Git and modern software development workflows
Experience with automated unit, integration, and system testing
Experience with CI/CD
Experience with Docker and containerized environments
Familiarity with static analysis, dependency management, and vulnerability scanning
Experience with debugging and profiling tools
Familiarity with observability, logging, monitoring, and system diagnostics
Experience working in Linux-based development and production environments
Strong understanding of software architecture and maintainable code design

Protocol Documentation

Experience documenting protocol specifications, message formats, state machines, key-management procedures, error conditions, and security assumptions.

You should be comfortable converting complex technical and cryptographic concepts into clear engineering documentation that can be implemented, tested, reviewed, and independently understood by other engineers.

QKD Experience

QKD expertise is not a requirement

The QKD infrastructure and its key-management mechanisms are already available. The selected engineer will work with our team to understand how shared key material is generated and made available between nodes, how keys are identified and retrieved, key availability and consumption constraints, key lifecycle and rotation requirements, the interfaces/APIs exposed by the QKD infrastructure, and its operational constraints.

Your responsibility is to build the cryptographic protocol on top of this key-management capability - not to develop the QKD system itself.

On-Site & Travel Requirements

This is an on-site position based in Toronto, Ontario. The project includes geographically distributed QKD and network nodes located in different cities, so the successful candidate must be comfortable traveling between project sites to support development, testing, deployment, integration, and troubleshooting.

Based in Toronto, or willing to relocate
Willing to travel between project sites in Canada
Comfortable in data centers, network facilities, and labs
Able to troubleshoot on-site, across software and networking layers
Valid driver’s licence, if required for site travel
Able to satisfy applicable site-access and security requirements
Canadian citizen or permanent resident - required for project/security clearance

Personal Qualities

Exceptional attention to detail, particularly with security-sensitive code
Strong analytical and problem-solving abilities
Enjoys reasoning about complex protocols and distributed systems
Comfortable challenging assumptions and identifying potential security weaknesses
Works independently and takes ownership of technical problems
Communicates complex technical concepts clearly, in writing and in person
Collaborates well with cryptographers, QKD engineers, network engineers, and software developers
Comfortable working with novel technology where established patterns may not exist
Pragmatic - balances security, performance, reliability, and engineering complexity
Strong sense of responsibility when working with cryptographic keys and security-critical infrastructure

Education & Experience

Bachelor’s or Master’s degree in Computer Science, Computer Engineering, Electrical Engineering, Cybersecurity, Mathematics, or a related field
5+ years of professional software engineering experience, with significant work in systems, networking, cybersecurity, or cryptographic software
Demonstrated professional experience with Rust
Demonstrated experience implementing or working with secure protocols or security-sensitive systems
Equivalent combinations of education, professional experience, and demonstrated technical expertise may be considered

What Success Looks Like

In this role, you will take a novel cryptographic protocol from specification to a secure, tested, interoperable implementation. You’ll be expected to think beyond simply implementing cryptographic operations - the implementation must correctly handle the complete protocol lifecycle: key acquisition, key usage, session state, message processing, failures, concurrency, synchronization, and secure recovery.

The end result should be a robust, well-engineered implementation capable of reliably operating between geographically distributed nodes connected through the QKD infrastructure.

Important Security Expectation

Because this project involves a novel cryptographic protocol, we distinguish between implementing a protocol and establishing that the underlying cryptographic construction is secure. You will be expected to identify implementation- and protocol-level security risks and participate in security reviews. Independent cryptographic review of the underlying construction may also be performed by cryptography specialists.

How to Apply

Send your resume, GitHub or relevant open-source contributions, and a short note on a systems or cryptography project you’re proud of to careers@superqubit.ai.

SuperQubit is committed to building secure, innovative technologies for the quantum era. We welcome applicants who are passionate about shaping the future of cybersecurity.

Apply About employer

More about this job

Responsibilities

Implement and integrate a novel cryptographic protocol in Rust, including secure key lifecycle management, session state, networking, and protections against protocol-level attacks. Test, document, optimize, and troubleshoot the implementation across geographically distributed nodes, collaborating with cryptography, QKD, and network specialists.

Requirements

Requires a bachelor’s or master’s degree in a relevant field, at least five years of professional software engineering experience, demonstrated Rust experience, and experience with secure protocols or security-sensitive systems. Candidates should have strong applied cryptography, Linux, networking, systems programming, and distributed-systems knowledge, and must be willing to work on-site in Toronto and travel between project sites; Canadian citizenship or permanent residency is required.

Skills

Rust
Applied Cryptography
Cryptographic Protocols
Key Management
Secure Networking
Systems Programming
Distributed Systems
TCP/IP and UDP
Linux
Concurrency
C/C++
Python
Protocol State Machines
Security Testing
CI/CD
Protocol Documentation

Visa sponsorship

Not detected in the job text

Keywords

Rust
C/C++
Python
Bash
Applied Cryptography
Cryptographic Protocols
Quantum Key Distribution
Key Management
Key Lifecycle
Linux
TCP/IP
UDP
IPv4/IPv6
Distributed Systems
Protocol State Machines
Replay Protection
TLS
QUIC
IPsec
WireGuard
Noise Protocol Framework
Wireshark
tcpdump
Docker
CI/CD
Automated Testing
Security Reviews
Threat Modeling
Rust FFI
Performance Profiling

Report this job