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Added 4 months ago
T
Senior QA Automation Engineer
Tubi
Toronto, Ontario
- Full-time
Tubi is seeking a highly skilled and experienced Senior QA Automation Engineer to lead quality assurance initiatives for our cutting-edge streaming and AI-driven product features. This…
Added 4 months ago
KC
Manager, Financial Crimes- Data Analytics
KPMG Canada
Ottawa, Ontario
- Full-time
…COE offers a dynamic platform to innovate, collaborate, and lead. Join us in shaping the future of financial crime prevention, where your impact will be felt across industries, borders, and…
Added 4 months ago
KC
Manager, Financial Crimes- Data Analytics
KPMG Canada
Toronto, Ontario
- Full-time
…COE offers a dynamic platform to innovate, collaborate, and lead. Join us in shaping the future of financial crime prevention, where your impact will be felt across industries, borders, and…
Added 4 months ago
O
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
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Senior Consultant, Migration Engineer
BDO
Toronto, ON
- Full-time
Lead and support application, infrastructure, database, and data migration initiatives for enterprise clients.
Added 1 month ago
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Architect - FinOps
Zynga
Toronto, ON
- $156,140 to $206,140 CAD / year
Come join our team at Zynga making an impact across all of the company’s games - Mobile Game Tech (MGT). Lead the FinOps team by setting technical direction, crafting and implementing…
Added 3 months ago
W
Principal Software Development Engineer - Applied AI
Wagepoint
Remote, Canada
- $200,000 to $220,000 CAD / year
- Full-time
- Remote
Full-stack breadth, spanning modern front-end frameworks and a Python back-end, sufficient to lead architecture across the entire product stack, not just AI services. .NET/C# experience is…
Added 2 months ago
AW
Senior Software Developer - Real-Time Processing Platform
Arctic Wolf
Waterloo, ON
- $75,000 to $246,000 CAD / year
- Full-time
At Arctic Wolf, you won’t just watch the cybersecurity industry evolve – you'll help lead the change. Our global Pack is made up of people who thrive on solving hard problems, moving fast,…
Added 3 months ago
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Senior Director, Pricing
Financeit
Remote, Canada
- Full-time
- Remote
Collaborate closely with cross-functional partners (Finance, Risk, Product) to lead the charge in dynamically aligning pricing strategies with evolving capital costs, merchant behavior, and…
Added 3 months ago
Senior Technology Manager, Data Delivery
Equitable
Waterloo, ON
Lead solution Development or Service practices and processes by enabling the team to deliver high quality solutions in a sustainable and optimized manner.
Added 3 months ago
M
Senior Software Developer, API Platform
Miovision
Remote, Canada
- $150,000 to $170,000 CAD / year
- Full-time
- Remote
…entire product ecosystem. We are looking for a Senior Software Developer to lead the technical execution of our unified API gateway; the high-speed express lane that powers everything from…
Added 3 months ago
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Financial Instruments Valuation and Market Risk Manager
PwC
Toronto, ON
- Full-time
Lead projects in valuation of Financial instruments, such as debt instruments with embedded derivatives, structured products, derivatives, and commodity contracts
Added 2 months ago
PS
Manager, Software Engineering
PDF Solutions
Vancouver, BC
- Full-time
Lead a software development team with focus on microservice development in .NET/Python
Added 1 month ago
PC
Sr. Data Engineer - Toronto, ON (Hybrid)
Pozent Corporation
Toronto, ON
- Contract
…ecosystem that empowers you to learn, explore, create, grow and…
Added 1 month ago
PC
Senior AI Engineer - Toronto, ON
Pozent Corporation
Toronto, ON
- Contract
Lead and contribute to the development of AI products, pilots, and solutions, emphasizing clean, maintainable code in Python, React, and AWS.
Added 5 months ago
L
Software Engineer, Pricing
Lyft
Toronto, Ontario
- Full-time
Independently lead features from idea to positive execution and launch
Added 4 months ago
E
Senior Software Engineer
Epoch
Canada
- Full-time
Lead end-to-end development of complex product features from ideation to production
Added 4 months ago
E
Senior Manager, Data Engineering
ecobee
Toronto, Ontario
- Full-time
As a Senior Engineering Manager in Data Engineering, you will lead a team of data engineers to build out our next generation Data Platform. With their support, you'll be responsible for…
Added 4 months ago
O
Solution Consultant - NAM
Omilia
Canada
- Full-time
Lead structured technical discovery engagements with certain deals within the assigned segment or region - mapping current-state technical architecture, identifying automation gaps,…
Added 3 months ago
BA
Director, Internal Audit Analytics & Artificial Intelligence
Brookfield Asset Management
Toronto, ON · Brookfield Place
- Full-time
Lead the continued development and execution of the Internal Audit Analytics & AI strategy and roadmap.
Added 2 months ago
I
Software Engineer II - Toronto
INSTALILY.AI
Toronto, ON
- $90,000 to $110,000 CAD / year
Lead technical discovery with enterprise customers and partner with the Growth team; translate complex real-world workflows into a shipped product
Added 3 months ago
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[Fastwater Staffing] Payload System V&V Engineer | Montreal, Canada (Full Relocation Package)
HIKINEX
Canada
- Full-time
Lead or support system-level payload test campaigns, both at equipment and spacecraft level.
Added 3 months ago
S
Applied AI Lead - Calgary
Sia
Calgary, AB
- Full-time
…subject matter experts help our clients to adapt, innovate, and lead in an evolving…
Added 3 months ago
S
Applied AI Lead - Edmonton
Sia
Edmonton, AB
- Full-time
…subject matter experts help our clients to adapt, innovate, and lead in an evolving…
Added 3 months ago
S
Senior Backend & Infrastructure Engineer
Scispot
Canada
- Full-time
Build and evolve backend services in Python and FastAPI, Java and Spring Boot, or closely related frameworks.

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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