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Added 1 month ago
AI Engineer
First National Financial LP
Toronto, ON · East York, ON
Full-time
Develop production quality code using Python, SQL, FastAPI, Git based workflows, automated tests, CI/CD, and modern engineering practices, and integrate AI services with Merlin, core…
Added 8 days ago
Test/Lab Engineer
Actalent
Oakville, ON
Contract
Professional, co-op, or academic experience with Python development.
Added 3 months ago
Senior Fullstack Engineer (Node. js)
Experity
Chiasson Office, NB
Full-time
Additional language expertise: Python (Django, Flask), Ruby on Rails.
Added 3 months ago
AWIPS Application Developer
WSP in Canada
St. John's, Newfoundland and Labrador · Greater St. John's Metropolitan Area
Full-time
This is a deeply technical, hands‑on development role focused on Python and Java, production‑grade cloud environments, and complex data systems. You’ll also play a key role in reducing…
Added 3 months ago
Java Developer with QA
LTM
Ontario · Ontario, Canada
$85,000 to $120,000 USD / year
Full-time
Handson test automation development experience using various languages like Java Python and TypeScript
Added 3 months ago
AI Full Stack Engineer
Feathery
Toronto, Ontario
$90,000 to $140,000 CAD / year
Full-time
…everything together. This role touches TypeScript services, Python APIs, React interfaces, and cloud…
Added 3 months ago
Senior Software Developer (Askuity division)
The Home Depot Canada
Toronto, Ontario
Full-time
Askuity is seeking a highly motivated and technical versatile Senior Software Developer. As a member of the development team at Askuity, you will drive the technical direction of our…
Added 3 months ago
Senior Automation Engineer
Tubi
Toronto, Ontario
Full-time
Strong programming skills in JavaScript/TypeScript (preferred), or Python/Java.
Added 3 months ago
Senior QA Automation Engineer
Tubi
Toronto, Ontario
Full-time
Familiarity with Python, TypeScript, or JavaScript for scripting and test automation.
Added 3 months ago
Senior AI Software Engineer
iManage
Toronto, Ontario
Full-time
Deep proficiency in Python and modern AI frameworks, including PyTorch and Hugging Face
Added 3 months ago
Senior AI Productivity Analyst, Data Analytics
Techedin
Toronto, Ontario
$60 to $70 CAD / hour
Full-time
Proficiency in Python or R for data analysis, statistical modeling, and automation.
Added 3 months ago
CAE Engineer, Optimus
Tesla
Langley, British Columbia
Full-time
Strong programming and data analysis skills in MATLAB, Python, or equivalent
Added 3 months ago
Senior Technical Artist - EA SPORTS FC
EA SPORTS
Vancouver, British Columbia
Full-time
Proficient scripting/programming language such as Python or C#. (C++ is a bonus, but is not required).
Added 3 months ago
Internship, Actuator Geartrain Mechanical Engineer, Optimus (Fall 2026)
Tesla
Langley, British Columbia
Internship
Programming skills in Matlab/Simulink and/or Python are preferred
Added 3 months ago
Architecte d’entreprise
CGI
Montreal, Quebec
Full-time
Developer Experience: Familiarity with multiple enterprise language ecosystems, (Java, .net, node, python,…). Knowledge of OpenShift Developer Hub (Backstage) or modern developer self…
Added 3 months ago
Manager, Financial Crimes- Data Analytics
KPMG Canada
Ottawa, Ontario
Full-time
…and validate financial crime systems and models using SQL, Python, R, and other programming languages, performing statistical analyses on samples, interpreting results, and effectively…
Added 3 months ago
Manager, Financial Crimes- Data Analytics
KPMG Canada
Toronto, Ontario
Full-time
…and validate financial crime systems and models using SQL, Python, R, and other programming languages, performing statistical analyses on samples, interpreting results, and effectively…
Added 3 months ago
Application Security Engineer
Opendoor
Toronto, Ontario
Full-time
…detection and secrets scanning and integrate findings into developer workflows where engineers already live (GitHub, Linear,…
Added 3 months ago
Senior Machine Learning Engineer
Skip
Edmonton, Alberta
Full-time
Proficiency in Python and SQL; or any other programming languages is a strong plus.
Added 3 months ago
DevOps Specialist
SCIENTIFIC GAMES
Montreal, Quebec
Full-time
…avec Terraform et Ansible ; la maîtrise de CloudFormation, Python, Bash, PowerShell, GitOps ou d’outils similaires constitue un atout…
Added 5 months ago
Senior Software QA Engineer
Comm100
Vancouver, British Columbia
Full-time
Proficient in using Python for test script development; Python, automated testing, and agile project experience.
Added 3 months ago
Linux Administrator
T-Rex Solutions
Remote, Canada
$75,000 to $112,000 USD / year
Full-time · Remote
Develop and maintain automation scripts using Bash, Python, and other relevant scripting languages.
Added 3 months ago
Data Analyst Specialist.
Cogeco
Remote, Canada
$35,000 to $60,000 USD / year
Full-time · Remote
Experience with Python or R for data analysis
Added 20 days ago
Engineering Manager, Home & Explore
Remitly
Burnaby, BC
Full-time
Expertise in at least one general application-development language (Go, Java, JavaScript/TypeScript, Python, etc.), with a preference for React/React Native familiarity given Home's…
Added 1 month ago
Senior Consultant, Migration Engineer
BDO
Toronto, ON
Full-time
Knowledge of DevOps, CI/CD pipelines, Terraform, PowerShell, Python, or other automation technologies.

Opendoor

Application Security Engineer

Toronto, ON, Canada

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

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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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