Find work in Canada.

323,441 jobs across our Canadian network. How we count

Jobs in Canada

25+ jobs

Email me new jobs Save this search

Added 25 mins ago
Android Engineer
AgileGrid Solutions
Canada
Full-time
Own and lead the technical design, architecture, and development of cross-functional, multi-platform application systems to ensure optimal performance and scalability.
Added 25 mins ago
Data Platform Engineer
AgileGrid Solutions
Canada
Full-time
…and optimization of our enterprise data infrastructure. As a senior member of the data engineering team, you will be responsible for designing scalable data pipelines, developing ETL…
Added 1 hour ago
ISE Operations and Project Coordinator
GeoSpectrum Technologies, Inc
Port Coquitlam, BC
Full-time
Provide comprehensive administrative support to the senior leadership team, including scheduling, correspondence, report preparation, and special assignments upon requests.
Added 2 hours ago
Senior Security Detection Engineer (Global Security)
Royal Bank of Canada
Toronto, ON
Full-time
The role of the Senior Security Detection Engineer is to provide specialized subject matter expertise for the Detection Engineering & Automation (DEA) team, for RBC's Global Cyber Security.…
Added 7 hours ago
Team Lead, Darlington Engineering Services
Kinectrics
Pickering, ON
Full-time
Diversity: The company is dedicated to promoting diversity in its workforce, up to and including the senior management level. Our diversity committee ensures we stay up to date on leading…
Added 7 hours ago
Senior Engineer - ServiceNow Development
TJX Canada – Winners, Marshalls, HomeSense
Mississauga, ON
$87,780 to $122,892 CAD / year
Full-time
We’re looking for a Senior Engineer - ServiceNow Development to play a key role in designing and delivering innovative ServiceNow solutions that enhance service management processes and…
Added 7 hours ago
Senior Project Engineer - Systems Engineer
General Dynamics Missions System International
Ottawa, ON
$110,000 to $135,000 CAD / year
Full-time
Are you ready to steer a talented team of engineers toward success? We are currently looking for a Project Engineer with leadership skills to play a driving force behind cutting-edge…
Added 9 hours ago
Piping Engineer Level II
Worley
Markham, ON
Full-time
In this role, you will contribute to the design, analysis, modification, and delivery of pressure piping systems for complex nuclear projects. Working under the guidance of senior engineers…
Added 9 hours ago
BUSINESS MANAGEMENT ANALYST
City of Toronto
Toronto, ON
Reporting to the Advisor, Strategic Planning & Business Support, you will contribute to a diverse portfolio of work that includes business and technology planning, process improvement,…
Added 9 hours ago
Senior Software Engineer – Full Stack
Publicis Sapient
Toronto, ON
Full-time
As a Senior Full Stack Developer, you will design and build scalable, high-performing applications that support complex, business-critical and transactional platforms. You will work across…
Added 10 hours ago
Lead Full-Stack GenAI Developer (Contractor)
KData AI
Toronto, ON
Full-time
Seniority & Experience: Proven track record as a Senior or Lead Engineer personally contributing code to production-deployed GenAI systems.
Added 11 hours ago
AI Engineer Intern
Electronic Arts (EA)
Vancouver, BC
Temporary
…solutions alongside a shared AI infrastructure for company-wide application. Our team employs a state-of-the-art, cloud-based tech stack equipped with top-tier tools to support initiatives…
Added 11 hours ago
Director - Enterprise Data Warehouse and Data Platforms
CGI
Ottawa, ON
Full-time
We are seeking a Director, Consulting Expert (DCE) – Enterprise Data Warehouse & Data Platforms to provide senior technical, solutioning, and client facing leadership
Added 12 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 12 hours ago
Senior Tritium Engineer
Kinectrics
Toronto, ON
Full-time
Diversity: The company is dedicated to promoting diversity in its workforce, up to and including the senior management level. Our diversity committee ensures we stay up to date on leading…
Added 12 hours ago
Principal Sales Systems Engineer
Jobgether
Canada
Full-time
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Sales Systems Engineer based in Canada.
Added 13 hours ago
Senior Security Detection Engineer (Global Security)
RBC
Toronto, ON
Full-time
The role of the Senior Security Detection Engineer is to provide specialized subject matter expertise for the Detection Engineering & Automation (DEA) team, for RBC's Global Cyber Security.…
Added 13 hours ago
Senior Engineer, Power Transformer Services
Kinectrics
Toronto, ON
Contract
Kinectrics is seeking an experienced Senior Engineer to support and grow its power transformer services business across Canada. The successful candidate will provide technical leadership in…
Added 13 hours ago
Software Engineer
7shifts
Toronto, ON
Full-time
…squad - the team responsible for building the foundational systems that serve restaurant groups with real complexity: multiple locations, layered permissions, and the need for rollup…
Added 14 hours ago
Senior Java Modernization Engineer
K&K Global Talent Solutions INC.
ON · Ontario, Canada
Full-time
We are seeking a Senior Java professional to drive enterprise application modernization initiatives, transform legacy Java applications, and support cloud migration programs. The ideal…
Added 15 hours ago
DevOps Manager
Rightsline Inc
Toronto, ON
$85,000 to $95,000 CAD / year
…and Europe. You will manage and develop a team of five - a Senior DevOps Engineer, a DevOps Engineer, and two Senior Systems Engineers - and hold end-to-end accountability for the…
Added 15 hours ago
Engineer (Electrical Power) - High Current Lab
Kinectrics
Toronto, ON
Full-time
Support the maintenance and upgrades to the key test equipment. Introduce and implement innovations to the plant equipment and data acquisition and monitor computer systems.
Added 15 hours ago
Staff Systems Engineer – Synthetic Aperture Radar (SAR) Missions
HIKINEX
Richmond, BC
Full-time
We are seeking a Staff Systems Engineer – Synthetic Aperture Radar (SAR) Missions to provide end-to-end technical oversight of SAR-related engineering activities throughout the lifecycle of…
Added 15 hours ago
Sr. Full Stack Developer, TD Securities
TD
Toronto, ON
Full-time
We are looking for a Senior Engineer to join the Equity Derivatives Technology Team and embrace a broad range of tasks associated with developing application and systems solutions to…
Added 16 hours ago
Business Systems Engineer Intern, Finance Technology (Summer 2027)
Lyft
Toronto, ON
$40 to $43 CAD / hour
We are seeking a motivated, technical student to join our Corporate FinTech team as a Business Systems Engineer Intern. This internship offers hands-on experience supporting the full suite…

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