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Added 1 month ago
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Ingénieur éLectrique
Actalent
Montreal, QC
- Contract
…programmation (GRAFCET, Ladder, Texte structuré) et d’équipements de test électrique et mécanique. L’environnement favorise la collaboration, les séances de remue-méninges en R&D et le…
Added 1 month ago
A
Test/Lab Engineer
Actalent
Oakville, ON
- Contract
Our client in the automotive industry, is looking to hire a Test/Lab Engineer.
Added 4 months ago
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Senior Software Engineer, EMR Platform
Experity
Chiasson Office, NB
- Full-time
Instrument services for observability using structured logging and APM tooling. Mentor Software Engineer I and II team members through code review and pairing
Added 4 months ago
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Software Engineer II, EMR Platform
Experity
Chiasson Office, NB
- Full-time
Apply the appropriate standards, processes, procedures, and tools throughout the software development life cycle.
Added 4 months ago
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Senior Automation Engineer
Tubi
Toronto, Ontario
- Full-time
We are looking for a talented Automation Engineer to join our Automation Engineering team in Toronto. In this role, you will be responsible for designing and implementing automated tests…
Added 4 months ago
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Senior QA Automation Engineer
Tubi
Toronto, Ontario
- Full-time
Help drive a shift-left testing approach by engaging early in the software development lifecycle, partnering with product managers, engineers, and data scientists to identify quality risks,…
Added 5 months ago
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CAE Engineer, Optimus
Tesla
Langley, British Columbia
- Full-time
…are boring, repetitive, and dangerous for humans. As a CAE Engineer, you will guide the design of sensors and structural components using high-fidelity FE models grounded in sound…
Added 5 months ago
J
Applied AI Engineer
Jetson
Kitchener, Ontario
- Full-time
An AI-native software engineer. You've integrated AI deeply into how you build software - not as a novelty, but as a core part of your workflow. You ship faster because of it, with higher…
Added 4 months ago
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Application Security Engineer
Opendoor
Toronto, Ontario
- Full-time
…while enabling unprecedented engineering velocity. We apply software engineering and AI to solve security problems across product, infrastructure, and operations by building guardrails…
Added 4 months ago
M
Software Engineer
Magical
Toronto, Ontario
- Full-time
As a Software Engineer, you’ll build the systems powering Magical’s AI agents. This is a wide-funnel role, open to a range of experience levels and backgrounds. We’ll calibrate scope…
Added 4 months ago
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QA Automation Engineer
Tubi
Toronto, Ontario
- Full-time
Tubi is seeking a highly skilled and experienced QA Automation Engineer to lead quality assurance initiatives for our cutting-edge streaming and AI-driven product features. This pivotal…
Added 3 months ago
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Senior Mechanical Engineer (TPSS)
Sotera Health
Ottawa, ON
- Full-time
The Mechanical Engineer will be responsible for the design, testing and on-going technical and manufacturing support of sealed sources and transport packages used for the shipment of…
Added 2 months ago
Staff Software Engineer
Dialpad
Vancouver, BC
As a Staff Software Engineer, you’ll own the platformization roadmap for shared services, architecting a plan to decouple existing functionality into highly reusable services. Your…
Added 3 months ago
CC
Senior Product Engineer - Onsite Position
Curtiss-Wright Corporation
Ottawa, ON · Canada-Ottawa
- Full-time
We’re seeking a passionate, Product Engineer who thrives on solving complex system-level challenges and is driven to push the boundaries of mission-critical embedded technology at our world…
Added 3 months ago
BS
Tech Lead - ToolHound
Beacon Software
Remote, Canada
- Full-time
- Remote
Tech Lead - ToolHound (Embedded, Beacon Software)
Added 3 months ago
A
Senior Optics Engineer
Adtran
Ottawa, ON
- Full-time
The Senior Optical Engineer will be responsible for the design, verification, and manufacturing support of pluggable optical transceiver modules used in datacenter, metro, and core network…
Added 1 month ago
A
Design Quality Engineer
Actalent
Montreal, QC
- Contract
Expérience en développement ou validation de logiciels et de matériels (software/hardware).
Added 1 month ago
A
RF System Verification Engineer
Actalent
Sainte-Anne-de-Bellevue, QC
- Contract
…validation des charges utiles, l'assemblage, l'intégration et le test (AIT), le support RF et les activités de vérification des plateformes/satellites. La priorité immédiate est d'ajouter…
Added 1 month ago
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Software Test Engineer
Actalent
Brossard, QC
- Contract
As a Software Test Engineer, you will help develop a new generation of advanced programmable unit controllers for refineries and oil rigs. You will design, execu
Added 4 months ago
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Senior Software Engineer (Back-end Focus)
LodgeLink
Calgary, Alberta
- Full-time
As a Senior Software Engineer, you should be comfortable around back-end coding languages, AI powered development frameworks, third-party libraries, and modern system design patterns such…
Added 4 months ago
TW
Project Infrastructure & MBSE Engineer - NETE
The Weir Group PLC
Dartmouth, Nova Scotia
- Full-time
Purpose of Role: Weir Marine Engineering is currently looking for a Project Infrastructure Engineer with Software Engineering experience to join our Combat and Control Systems (CCS) Model…
Added 4 months ago
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Senior Engineer QA
ecobee
Toronto, Ontario
- Full-time
Strong software development and design skills to build test automation infrastructure
Added 4 months ago
TS
Automated Software Test Engineer
T-Rex Solutions
Remote, Canada
- $95,000 to $145,000 USD / year
- Full-time
- Remote
T-Rex Solutions is seeking an Automated Software Test Engineer to support the development of products using cutting edge technologies as part of a large modernization effort supporting the…
Added 4 months ago
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Senior Mobile Engineer I (Hybrid)
Homebase
Toronto, Ontario
- $130,000 to $160,000 CAD / year
- Full-time
As a Senior Mobile Engineer I, you’ll build high-quality, high-performance experiences on our tablet apps (Android and iPad) that help small business owners reclaim time, reduce chaos, and…
Added 4 months ago
E
Thanks for visiting our Job Board. Please review our open positions and apply to the positions that match your qualifications.
Evertz
Burlington, Ontario
- Full-time
The FPGA Design Engineer at Evertz contributes to the development of advanced broadcast equipment used in real-time video and audio production, processing, and transport for Live sports…

Opendoor

Application Security Engineer

Toronto, ON, Canada

Full-time

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Job details

Job type: Full-time
Posting language: English
Posted: Jun 18, 2026

Original job description

About Opendoor

At Opendoor our mission is to tilt the world in favor of homeowners and those who aim to become one. Homeownership matters. It's how people build wealth, stability, and community. It's how families put down roots, how neighborhoods strengthen, how the future gets built. We're building the modern system of homeownership giving people the freedom to buy and sell on their own terms. We’ve built an end-to-end online experience that has already helped thousands of people and we’re just getting started.

About The Role

Our Security Engineering team builds intelligent systems that protect Opendoor and our customers while enabling unprecedented engineering velocity. We apply software engineering and AI to solve security problems across product, infrastructure, and operations by building guardrails where they matter, not gates where they don't.

As our Application Security Engineer, you'll own how we find, prioritize, and drive down application-layer risk across the consumer flows that put cash offers in homeowners’ hands, the GraphQL APIs that power our products, and the AI agents and vibe-coded tools our engineers ship every week. The job is to make it safe to build fast, not to slow things down.

What You'll Do

Define, build and operate Opendoor’s application vulnerability identification capability - the tooling, triage workflow and remediation techniques across our consumer products, internal admin tools and GraphQL API powering home acquisition, resale, mortgage, title and escrow.
Assess, rationalize and own our AppSec tooling stack - static and dynamic security testing, software supply chain risk detection and secrets scanning and integrate findings into developer workflows where engineers already live (GitHub, Linear, Slack).
Own and mature our HackerOne program: tightening the triage workflow, improving signal to noise on incoming reports, strengthening researcher relationships and closing the loop with engineering teams so root causes get addressed quickly.
Lead threat modeling and security design reviews for new services, APIs, and mobile features. Turn the patterns you see into rules, lint checks, and CI guardrails so the next team doesn't make the same mistake.
Build AI agents and automated workflows that triage vulnerability reports, validate exploit reproductions, and draft remediation pull requests, replacing manual security review with high-signal automation.
Partner with engineering teams to harden authentication, authorization, and input validation across our codebase and production services, including the GraphQL gateway (Apollo) and our Kubernetes workloads - while driving a shift-left strategy that catches vulnerabilities before they ship.
Build Opendoor’s offensive security capability. Scope and run internal security testing, red team exercises and adversarial analysis of our highest-risk flows ensuring findings directly harden detection and response.
Set the bar for what "secure by default" looks like for AI-maximalist engineering, including vibe-coded apps, MCP servers, and agent-driven workflows that touch production data.
Build Opendoor’s security culture by establishing secure design standards, embedding into engineering team rituals and developing a strong security mindset - creating a foundation for engineers to think like attackers without slowing down.

Tech Stack

Languages: Go, Python, TypeScript, Ruby, Terraform
Cloud: AWS, GCP, Azure, Kubernetes, Apollo GraphQL
AppSec Tooling: GitHub Advanced Security (CodeQL, Dependabot, secret scanning),

Semgrep, HackerOne, Burp Suite, Cloudflare WAF

AI Tooling: Claude, OpenAI, various agent frameworks, MCP - used heavily for vulnerability triage, exploit verification, and remediation drafting

What You'll Need

Deep conviction that AI and automation should eliminate manual work and increase the team's impact, and a track record to prove it. You’ve built agentic systems that replaced reactive security work, not just configured off-the-shelf tools.
Comfort operating with high autonomy in ambiguous environments. You’ve defined what “good” looks like in a domain where no playbook existed, you’re energized by that, not unsettled by it.
Business enablement security mindset. You measure success by business impact and informed risk-taking, not by tickets opened or pen test reports filed.
5+ years of application security or software engineering experience with a security focus, with strong skills in at least one of Python, Go, TypeScript, or Ruby, and the ability to read and write code across the others.
Hands-on expertise across the security risk detection toolchain with real deployment experience using GitHub Advanced Security, Semgrep, or equivalent.
Strong grasp of common application and API vulnerability classes including GraphQL, REST, and gRPC security pitfalls - broken authorization, mass assignment, introspection exposure, insecure direct object references.
Practical threat modeling skills. You can take an architecture diagram and a 30-minute conversation and walk out with the three things that actually matter.
Experience with cloud and container security on AWS and Kubernetes, including identity and access management, secrets management, and continuous integration / continuous deployment pipeline security.
Humility and genuine curiosity. You're as excited to learn from product engineers and enable their work as you are to break things.

Bonus Points

Offensive security experience including pentesting, API security, or mobile security, and/or red team operations.
Experience running a bug bounty or coordinated disclosure program at scale.
Mobile application security review experience (iOS and Android).
Experience securing AI and machine learning pipelines, agent frameworks, or MCP-style integrations.
OSCP, OSWE, or similar offensive certifications.

Location

This role is based in our downtown Toronto office, in-person four days per week (Monday, Tuesday, Thursday, Friday). Candidates must be based within commuting distance of the office.

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More about this job

Responsibilities

As an Application Security Engineer, you will define and operate Opendoor’s application vulnerability identification capability and lead threat modeling and security design reviews. You will also build AI agents and automated workflows to enhance security processes and partner with engineering teams to improve security across the codebase.

Requirements

Candidates should have 5+ years of application security or software engineering experience with a focus on security, and strong skills in at least one programming language such as Python, Go, TypeScript, or Ruby. A deep understanding of application and API vulnerabilities, along with practical threat modeling skills, is essential.

Skills

Application Security
Software Engineering
Python
Go
TypeScript
Ruby
Threat Modeling
Cloud Security
Kubernetes
GitHub Advanced Security
Semgrep
Vulnerability Management
Automation
AI
Security Testing
Incident Response

Visa sponsorship

Not detected in the job text

Keywords

Application Security
Software Engineering
Python
Go
TypeScript
Ruby
Terraform
AWS
GCP
Azure
Kubernetes
Apollo GraphQL
GitHub Advanced Security
Semgrep
HackerOne
Burp Suite
Cloudflare WAF
AI
Automation
Vulnerability Management
Threat Modeling
Security Testing
Incident Response
Mobile Security
Pentesting
Red Team Operations
Bug Bounty
Continuous Integration
Continuous Deployment
Identity Management

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