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Added 4 months ago
Senior Backend Engineer
Partyhat
Remote, Canada
Full-time · Remote
…developer who just writes basic CRUD APIs. We need an elite Backend Systems Architect who can build world-class, hyper-scalable, and fault-tolerant infrastructure with surgical precision.…
Added 14 days ago
Senior Software Engineer, AI Authentication (Auth0)
Okta
Toronto, ON
Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work…
Added 4 months ago
AI Engineer - Remote
Huzzle
Remote, Canada
Full-time · Remote
We are looking for a skilled AI Engineer with at least 2 years of hands-on experience in developing, deploying, and optimizing AI and machine learning solutions. You will work closely with…
Added 4 months ago
Software Engineer, Infrastructure (TOR)
Doppel
Toronto, ON
Full-time
We’re looking for an experienced backend engineer to build out the infrastructure required to rapidly scale up our engineering organization. A few examples of the work we’ve done recently:
Added 4 months ago
Software Engineer, Detection (TOR)
Doppel
Toronto, ON
$157,000 to $367,000 CAD / year
Full-time
We’re looking for passionate engineers who love building and operating backend systems at scale - someone who can take ambiguous detection/product problems and deliver reliable production…
Added 27 days ago
Sr. Staff Physical Design Timing Engineer (STA)
Lightmatter
Toronto, ON
We are hiring a Physical Design Timing Engineer to help drive backend digital execution for some of the leading photonics based interconnect solutions. You will work alongside a team of…
Added 4 months ago
Senior Supply Chain Security Engineer (East Coast Preferred)
Docker
Remote, Canada
Full-time · Remote
…providing the sandboxed environments, verified images, and secure infrastructure that make autonomous workflows trustworthy by…
Added 17 days ago
Senior Software Engineer, R&D Business Systems
Fivetran
Toronto, ON
We’re looking for a Senior Software Engineer within our Engineering Strategy and Operations group. Our Research and Development (R&D) department is dedicated to accelerating innovation.…
Added 4 months ago
AI Engineer - Remote
Huzzle
Remote, Canada
Full-time · Remote
We are looking for a highly skilled AI Engineer to design, build, and deploy AI-driven applications and machine learning solutions. You’ll work closely with product, engineering, and data…
Added 21 days ago
IT Industrial CrossFunction - Full Stack & AI Integration
Amrize
Mississauga, ON · Laval, QC
The Industrial IT Full Stack / Back End & AI Integration Snr. Engineer role is to contribute her/his skills to the development of company Industrial Solutions including AI-powered features…
Added 4 months ago
Staff Product Engineer - Canada
Ashby
Remote, Canada
$256,000 to $380,000 CAD / year
Full-time · Remote
Hi 👋🏾 I’m Abhik, Ashby's Co-Founder and VP of Engineering. We’re looking for a versatile, persistent product engineer who’s not afraid to set up reusable building blocks across the stack…
Added 4 months ago
Senior Software Engineer
Jobber
Remote, Canada
Full-time · Remote
Comms Systems: The Communication Systems team powers the messaging infrastructure within Jobber, enabling customers to send merely 20M texts and emails per month. Communication is central…
Added 4 months ago
Senior Full Stack Software Engineer
Super.com
Remote, Canada
Full-time · Remote
As a Senior Full-Stack Engineer, you will be a senior technical contributor on one of our teams, working across both frontend and backend web development. You will help solve complex…
Added 4 months ago
Senior Platform Systems Engineer
Bettermode
Toronto, Ontario
Full-time
…runtime architecture, Terraform-governed AWS and Cloudflare infrastructure, service-to-service networking, data-plane efficiency, OLAP analytics systems, databases such as Aurora PostgreSQL…
Added 4 months ago
Senior Full Stack Engineer - eCommerce Platform
Hasbro
Montreal, Quebec
As a Senior Software Development Engineer (SDE II) on the Hasbro Pulse team, you will architect, scale, and refine complex systems that bring Hasbro’s iconic brands to life online. You’ll…
Added 4 months ago
Senior Software Engineer, Platform Engineering
PointClickCare
Mississauga, Ontario
Full-time
…and patients. We may not own every part of the stack, but we engineer the APIs, abstractions, and interfaces that piece it together meaningfully - and we own the design, implementation,…
Added 14 days ago
Staff Software Engineer, Delegated Administration (Auth0)
Okta
Toronto, ON
Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work…
Added 4 months ago
Senior Product Engineer - Canada
Ashby
Remote, Canada
$195,000 to $248,000 CAD / year
Full-time · Remote
Hi 👋🏾 I’m Abhik, Ashby's Co-Founder and VP of Engineering. We’re looking for a versatile, persistent product engineer who’s not afraid to set up reusable building blocks across the stack…
Added 1 month ago
Python AI Engineer (Hands-On)
Citi
Mississauga, ON
Full-time
Citi's global AI platforms team is seeking a versatile Python AI Engineer to spearhead the design and development of cutting-edge Generative AI platforms. This role is a key driver in…
Added 4 months ago
Software Engineer Intern (Winter 2027)
Cohere
Remote, Canada
Internship · Remote
We're currently hiring for multiple teams and roles, including Frontend, Backend, Full-stack, and Infrastructure roles. We'll take your interests & experience into account throughout the…
Added 1 month ago
Python AI Engineer (Hands-On)
Citi
Remote, Canada
Full-time · Remote
Citi's global AI platforms team is seeking a versatile Python AI Engineer to spearhead the design and development of cutting-edge Generative AI platforms. This role is a key driver in…
Added 4 months ago
Senior Machine Learning Engineer
Index Exchange
Toronto, Ontario
Full-time
…servers to networks and runs primarily on our own metal and cloud infrastructure. This end-to-end infrastructure is designed to provide both stability and agility, enabling us to adapt…
Added 20 days ago
Forward Deployed Engineer, Infrastructure Specialist (Public Sector)
Cohere
Remote, Canada
$215,000 to $385,000 CAD / year
Full-time · Remote
We are seeking engineers with diverse skill sets, including backend, infrastructure, agent development, and deployments, who deeply care about customers and want to work at the cutting edge…
Added 5 months ago
Full Stack Engineer, Early Career
Feathery
Remote, Canada
Full-time · Remote
We’re hiring a Full Stack Engineer to help build and scale core product capabilities end-to-end. This role is ideal for someone early in their career who enjoys owning features across the…
Added 5 months ago
Full Stack Engineer
Feathery
Remote, Canada
$100,000 to $140,000 CAD / year
Full-time · Remote
We’re hiring a Full Stack Engineer to help build and scale core product capabilities end-to-end. This role is ideal for someone who enjoys owning features across the stack - from designing…

Doppel

Software Engineer, Detection (TOR)

Toronto, ON, Canada

Pay: $157,000 to $367,000 CAD / year
Job type: Full-time
Posting language: English
Posted: May 12, 2026

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Original job description

Why Join Doppel

Doppel is building the future of social engineering defense. Our AI-native platform uses agentic AI to protect executives, employees, customers, and brands from phishing, impersonation, fraud, and other AI-powered threats across digital channels. We help some of the world’s most recognized brands detect and dismantle attacker infrastructure while strengthening employee resilience through threat-informed training and simulation. By unifying Digital Risk Protection, Human Risk Management and Email Security, Doppel connects threats into a real-time intelligence graph to power faster disruption, smarter defense, and modern security awareness at scale.

Backed by leading investors including Andreessen Horowitz and Bessemer Venture Partners, and trusted by leading enterprises, Doppel is a rapidly growing Series C startup building the future of social engineering defense. Our team combines deep cybersecurity expertise, operational rigor, and startup velocity to solve some of the internet’s most urgent trust and safety challenges.

What We're Building

We're building the AI-native social engineering defense platform.

This means we're designing scalable systems that monitor billions of domains, social media accounts, apps, dark web forums, etc., and leverage AI agents to identify and neutralize digital threats.

What We're Looking For

We’re looking for passionate engineers who love building and operating backend systems at scale - someone who can take ambiguous detection/product problems and deliver reliable production services and UIs that help our ops and customers find and remediate threats. You’ll focus on high-throughput ingestion, enrichment, scoring and alerting pipelines, APIs and dashboards, threat-linking infrastructure, and reliable automation that the stakeholder teams use every day.

Hands-on experience building production backend services or full-stack features (or equivalent). Proven record of shipping end-to-end: design → implementation → testing → monitoring → oncall.
Strong mastery of at least one backend language (Python, Go, Java, or Node) and comfort with web APIs, async processing, and service frameworks.
Solid system design skills: experience architecting scalable, fault-tolerant systems (sharding, caching, queueing, idempotency, backpressure).
Experience building and operating large data pipelines (batch or streaming), working with warehouses or OLAP systems for analytics, and designing efficient schemas for scale.
Deep practical experience with backend concerns: databases (SQL + NoSQL), caching, message queues, rate limiting, retries, and cost/latency tradeoffs.
Strong observability, debugging and incident response skills: structured logging, tracing, dashboards, SLOs/alerts, and the ability to triage and fix production issues.
Product ownership and excellent cross-functional communication - you’ll collaborate with Operations, Customer Success, Sales, to deliver measurable outcomes.

As part of our Toronto team, you’ll:

Work on a wide range of asks that protect billions of people from digital impersonation
Have complete end to end ownership - from directly collecting customer requirements to continuously iterating on shipped releases.
Mentor junior engineers, make key product decisions, and foster a high-performing team culture

What We Offer

🚀 A mission-driven culture with low ego, high ownership, deep customer obsession, and exceptional talent density

🍽️ Free lunch and dinner in the office

🌴 Flexible PTO

✈️ Quarterly team offsites

Join Doppel

Doppel is the first platform built to dismantle digital deception at scale. We scan over 150 billion entities daily and deploy continuously adaptive AI SOC agents, paired with expert human analysts, to uncover and disrupt the infrastructure behind phishing, impersonation, and online fraud before attacks can spread. Our Threat Grid turns every customer signal into shared intelligence, making each disruption smarter, faster, and more effective.

We’re not just another cybersecurity company. We’re defining the future of social engineering defense, where trust is protected, and deception becomes unprofitable. Backed by top-tier investors and trusted by some of the world’s most recognized brands, Doppel is growing fast. If you’re driven to solve real-world problems with bold technology, we’d love to meet you.

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More about this job

Responsibilities

Design and operate scalable backend systems and high-throughput data pipelines to identify and neutralize digital threats. You will take end-to-end ownership of features from requirement gathering to production monitoring and mentor junior engineers.

Requirements

Requires strong mastery of a backend language (Python, Go, Java, or Node) and deep experience with scalable system architecture and data pipelines. Candidates must have a proven track record of shipping production services and managing the full software development lifecycle.

Skills

Backend Development
System Design
Data Pipelines
Python
Go
Java
Node
SQL
NoSQL
API Design
Async Processing
Observability
Incident Response
Full-stack Development
Scalable Systems
Mentoring

Benefits

Free lunch and dinner in the office
Flexible PTO
Quarterly team offsites
Equity

Visa sponsorship

Not detected in the job text

Keywords

Software Engineering
Detection
AI
Social Engineering Defense
Backend Services
High-throughput Ingestion
Enrichment Pipelines
Threat-linking Infrastructure
Sharding
Caching
Queueing
Idempotency
Backpressure
OLAP
Message Queues
Rate Limiting
Structured Logging
Tracing
SLOs
Cybersecurity
Phishing
Impersonation
Online Fraud
SOC Agents
Threat Grid
Distributed Systems
Full-stack
API
Data Warehousing

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