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Added 4 months ago
T
Senior Software Engineer - Professional Services
Trackunit
London, Ontario
- Full-time
Backend: REST APIs, Java Spring Boot, Node.js, Kafka, Flink and modern cloud-based microservice and event-driven architectures
Added 4 months ago
PG
Lead Full Stack Developer
Publicis Groupe Holdings B.V
Toronto, Ontario
- Full-time
…picture of a multi-tier platform - React frontend, Spring Boot backend, FastAPI agentic services, agent SDKs on top of LLM providers. You are equally comfortable reviewing a database…
Added 1 month ago
Staff Software Engineer
Fivetran
Toronto, ON
Fivetran is looking for a Staff Software Engineer to join our Database Connector team. This team builds and operates the core replication technology that powers reliable, scalable data…
Added 2 months ago
CO
Staff Software Engineer - Capital One Travel Tech - Full-stack
Capital One
Toronto, Ontario
- Full-time
161 Bay Street (93021), Canada, Toronto,Toronto, Ontario,Staff Software Engineer - Capital One Travel Tech - Full-stack
Added 4 months ago
Senior Back End Engineer (Data Platform)
Forma.ai
Toronto, Ontario
As a Senior Engineer, Data Platform, you are expected to operate with strong ownership and sound technical judgment. This includes identifying risks in the work you own, surfacing edge…
Added 4 months ago
Senior Software Engineer (Applications)
Forma.ai
Toronto, Ontario
As a Senior Backend Engineer, you are expected to operate with strong ownership and sound technical judgment. This includes identifying risks in the work you own, surfacing edge cases,…
Added 1 month ago
CO
Staff Software Engineer - Capital One Travel Tech - Full-stack
Capital One
Toronto, ON
- Full-time
161 Bay Street (93021), Canada, Toronto,Toronto, Ontario,Staff Software Engineer - Capital One Travel Tech - Full-stack
Added 4 months ago
P
Game Mathematician
Partyhat
Remote, Canada
- Full-time
- Remote
…mathematical heart of our iGaming ecosystem. Your job is to engineer the exact numerical frameworks - the hitting frequencies, cascading bonus loops, and risk profiles - that generate…
Added 4 months ago
M
Principal Software Engineer - Distributed Systems
Microsoft
Vancouver, British Columbia
- Full-time
The Fabric Mirroring team is currently seeking a Senior Software Engineer to join their team. This team oversees designing, building, and operating a next generation service that transfers…
Added 4 months ago
S
Technical Support Engineer
Sentry
Remote, Canada
- $100,000 to $125,000 CAD / year
- Full-time
- Remote
We are architecting the Technical Support engine. We’re looking for a veteran engineer to help us redefine the standard of technical support by combining deep human expertise with…
Added 4 months ago
IL
Advanced Quality Engineer
Invesco Ltd.
Charlottetown, Prince Edward Island
- Full-time
Develop automated test scripts for UI, API, and backend services.
Added 4 months ago
Senior Software Engineer, Backend (Consumer - Risk)
Coinbase
Canada
Deep proficiency in backend languages (Go, Ruby, Python, or Java) with demonstrated experience designing distributed systems including microservices, event-driven architectures, and…
Added 5 months ago
TA
Senior Software Engineer
Treasure AI
Vancouver, BC
- $132,500 to $171,000 CAD / year
- Full-time
Strong backend proficiency (experience with Ruby, Go, Java, or Kotlin is preferred), including a solid understanding of database design and API scalability.
Added 1 month ago
EM
Senior Software Engineer - Backend
Evertz Microsystems Limited
Burlington, ON
- Full-time
We are seeking a highly motivated Senior Software Engineer to join our growing engineering team. This role offers an exciting opportunity to design and build scalable, production grade…
Added 1 month ago
R
Senior Software Development Engineer, Authentication
Remitly
Burnaby, BC
- Full-time
Design and build authentication services and flows end-to-end - backend services (Go, Java, TypeScript), identity platform configuration and custom actions, and native mobile and web login…
Added 4 months ago
C
Java Full-stack Developer
Capgemini
Mississauga, Ontario
- Full-time
The candidate must have Java backend development experience with Core Java Java EE Springboot Framework and Microservices experience
Added 4 months ago
C
React Full Stack Developer
Citi
Remote, Canada
- Full-time
- Remote
From a technical standpoint, the Software Engineer has full-stack coding and implementation responsibilities and adheres to best practice principles including modern cloud-based software…
Added 5 months ago
N
Senior Data Engineer
NimbleRx
Toronto, Ontario
- Full-time
Optimize backend query performance where the data layer meets product code - reader-replica routing, indexing, caching, and IO instrumentation in our Java/Spring services
Added 1 month ago
Staff Software Engineer - Growth Platform
Faire
Toronto, ON · Kitchener, ON
Backend development (e.g., Kotlin, Java, C#, APIs, databases, distributed systems), or
Added 5 months ago
P
Principal/Senior Software Engineer
PointClickCare
Mississauga, Ontario
- Full-time
Background with Spring Boot and Java ecosystem
Added 5 months ago
D
Software Engineer, Detection (TOR)
Doppel
Toronto, ON
- $157,000 to $367,000 CAD / year
- Full-time
Strong mastery of at least one backend language (Python, Go, Java, or Node) and comfort with web APIs, async processing, and service frameworks.
Added 5 months ago
C
Lead Java Developer
Citi
Remote, Canada
- Full-time
- Remote
We are looking for a Java Engineer to design, build, and support modern web APIs. This role focuses on back-end services (Java/Spring Boot), with API-first, microservices-based architecture…
Added 1 month 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 5 months ago
C
Lead Java Full Stack Developer
Citi
Mississauga, Ontario
- Full-time
Role Summary: We are looking for a Java Full-Stack Engineer to design, build, and support modern web applications. This role spans front-end development (Angular or React) and back-end…
Added 5 months ago
C
Lead Java Full Stack Developer
Citi
Remote, Canada
- Full-time
- Remote
Role Summary: We are looking for a Java Full-Stack Engineer to design, build, and support modern web applications. This role spans front-end development (Angular or React) and back-end…

Doppel

Software Engineer, Detection (TOR)

Toronto, ON, Canada

$157,000 to $367,000 CAD / year · Full-time

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Job details

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

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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