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Added 7 mins ago
MG
System Application Specialist - Clinical Informatics
Michael Garron Hospital
Toronto, ON
- Full-time
…This includesmanagement of interface between Cerner and other systems, analysis of the structure and processing of health information for decision making, and subsequent system build to…
Added 7 mins ago
CC
PRODUCTION & PROJECT ENGINEER- TECHNISEAL, Candiac QC
CRH Canada
Candiac, QC
- Full-time
Strong knowledge of industrial equipment and automation systems.
Added 24 mins ago
TS
AVP, AI & Innovation
TD Securities
Toronto, ON
- Full-time
…job-related knowledge, geographic location, and other specific business and organizational…
Added 25 mins ago
M
Senior Java Full Stack Developer
Miratech
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 25 mins ago
GD
Senior System Engineering Analyst, Engineering (HQ SE)
General Dynamics Missions System International
Ottawa, ON
- $90,000 to $120,000 CAD / year
- Full-time
At General Dynamics Mission Systems–Canada, we’re not just engineering technology - we’re shaping the future of defence and security. Our teams design and deliver advanced, mission-critical…
Added 25 mins ago
RB
Lead Agentic AI Engineer
Royal Bank of Canada
Toronto, ON
- Full-time
…Advisor productivity through agentic AI workflows - bridging business problems with intelligent automation. This is a high-ambiguity, rapid experimentation role where you'll define how…
Added 39 mins ago
MT
Manager, Finance Transformation
Midland Transport
Moncton, NB
- Full-time
Bachelor’s degree in Accounting, Finance, Business Administration, Data Analytics, Information Systems, or a related discipline.
Added 1 hour ago
M
Senior Java Full Stack Developer
Miratech
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 1 hour ago
R
Marketing Operations Manager
Relay
Remote, Canada
- Full-time
- Remote
Build and run the systems and automation behind the funnel.
Added 2 hours ago
ET
Director, Cybersecurity, Digital Transformation, Applications, Data and Artificial Intelligence
E2IP TECHNOLOGIES
Montreal, QC
- Full-time
Identify opportunities to optimize business and operational processes through automation, systems integration and continuous improvement.
Added 2 hours ago
FR
Live - Out Building Superintendent
FirstService Residential Canada
Burlington, ON
- Full-time
FirstService Residential is owned by FirstService Corporation, a proudly Canadian company and one of Canada’s great business success stories.
Added 2 hours ago
MT
Financial Systems Specialist
Midland Transport
Dieppe, NB
- Full-time
…Specialist to support the continued evolution of our Finance systems, processes, and reporting capabilities. Based at our Head Office in Dieppe, NB, this role will work across Finance, IT,…
Added 2 hours ago
O
Consultant(e) en implantation principal // Senior implementation consultant
Onomatic
Montreal, QC
- Full-time
Onomatic is an automation orchestration platform company transforming how warehouses, distribution centers, and manufacturing operations run. We provide a unified execution layer that…
Added 2 hours ago
IW
Senior Administrative Assistant - Kingston, ON
IG Wealth Management
ON · Ontario, Canada
- Full-time
Founded in 1926, IG Wealth Management is a key part of IGM's business model, providing comprehensive wealth management services to Canadian financial advisors and their clients.
Added 2 hours ago
B
Professional Senior, Engineering - Avionics Systems
Bombardier
Montreal, QC
- Full-time
In your role as an Avionics Systems / Engineering Professional, you will be responsible for performing various tasks related to the development, testing, certification, production, and…
Added 2 hours ago
LT
Project Manager I
LMI Technologies
Burnaby, BC
- Full-time
…flows as required by LMI’s quality and environmental management systems and other reporting…
Added 2 hours ago
Q
Senior Product Manager, AI Operations
Quandri
Vancouver, BC
- Full-time
…time. We pair a deep understanding of insurance processes, systems, and data with serious technical capability and proprietary models, so the transformation is tangible and operational…
Added 2 hours ago
KS
Controller
Keynote Search
Ottawa, ON
- $110,000 to $140,000 CAD / year
- Full-time
…the organization is focused on strengthening the financial systems and processes that support its growth. They are looking for a Controller who can bring both technical expertise and a…
Added 2 hours ago
D
Business Technical Analyst
Deloitte
Toronto, ON
- Full-time
…people can find meaning and opportunity. It builds consumer and business confidence, empowers organizations to find imaginative ways of deploying capital, enables fair, trusted, and…
Added 2 hours ago
IW
Senior Analyst Finance
IG Wealth Management
ON · Ontario, Canada
- Full-time
Involvement in finance systems and process automation initiatives, including AI assisted process enhancements.
Added 2 hours ago
TS
Analyst – Front Office Application Engineer
TD Securities
Toronto, ON
- Full-time
…within TD Securities that supports the Global Equity Derivatives business. The team develops and enhances pricing models, risk analytics, trading tools, and automation solutions that enable…
Added 2 hours ago
GD
Manager, Infrastructure and Cloud Services
General Dynamics Missions System International
Ottawa, ON
- $120,000 to $160,000 CAD / year
- Full-time
At General Dynamics Mission Systems–Canada, we’re not just engineering technology - we’re shaping the future of defence and security. Our teams design and deliver advanced, mission-critical…
Added 2 hours ago
N
Corporate Accountant
Nelson
Toronto, ON
- Full-time
…improvement, and works closely with colleagues across Finance and the business to ensure accounting information is complete and…
Added 2 hours ago
TU
Content and Communications Specialist
The University of British Columbia
Vancouver, BC
- $7,158.42 to $10,292.25 CAD / month
- Full-time
Marketing Automation and Email Campaign Planning, Coordination, and Implementation
Added 2 hours ago
L
Security Engineer, Vulnerability Management & Security Operations
LiveKit
Canada
- Full-time
…so a security failure on our side puts their data and their business at risk. We are hiring a Security Engineer to build and run our vulnerability management and security operations…

Opendoor

Application Security Engineer

Toronto, ON, Canada

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Job details

Posting language: English
Posted: Jun 17, 2026

Original job description

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.

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

We're looking for team members who are enthusiastic about an in-office culture - people who want to build alongside others and not from a distance. This role is based in one of our talent hubs where we welcome everyone 5 days a week with the requirement of Mo, Tu, Th, Fri.

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More about this job

Responsibilities

The Application Security Engineer will define and operate vulnerability identification capabilities while building AI-driven workflows to automate security triage and remediation. They will also lead threat modeling, security design reviews, and partner with engineering teams to harden production services and infrastructure.

Requirements

Candidates must have strong software engineering experience with a security focus and proficiency in Python, Go, TypeScript, or Ruby. The role requires hands-on expertise in application security tooling, cloud/container security, and a proven track record of using automation to solve security challenges.

Skills

Application Security
Software Engineering
Python
Go
TypeScript
Ruby
GraphQL
Kubernetes
AWS
GCP
Threat Modeling
Vulnerability Management
CI/CD
Offensive Security
AI Automation
Cloud Security

Visa sponsorship

Not detected in the job text

Keywords

Application Security
Security Engineering
Go
Python
TypeScript
Ruby
Terraform
AWS
GCP
Kubernetes
Apollo GraphQL
GitHub Advanced Security
CodeQL
Dependabot
Semgrep
HackerOne
Burp Suite
Cloudflare WAF
AI Agents
Threat Modeling
Red Teaming
Offensive Security
API Security
Shift-left
Vulnerability Triage
Identity and Access Management
CI/CD Pipeline Security
OSCP
OSWE
Mobile Security

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