Senior Security Engineer; Remote

Position: Senior Security Engineer (Remote )
About Float  Float is on a mission to simplify finance for Canadian businesses, empowering them to eliminate complexity and unlock new opportunities. Through our innovative platform, Float enables businesses to streamline financial operations and optimize cash flow, so they can focus on what matters most: growth.
As one of Canada’s fastest growing companies and top‑rated startups in 2024 and 2023, Float is customer‑obsessed, passionate and entrepreneurial, with a team that includes leaders from Uber, Shopify, Top Hat, Touch Bistro, Bill, Stripe, and Ada.
At Float, everyone is an owner, bringing their unique perspective to our team and product. Your voice is important, and we take having a culture based on feedback seriously. We openly share our thoughts and differing opinions so we can continue to improve. We do our best to keep our decision‑making decentralized so that all team members feel ownership in our success.
Our Product  Float is Canada’s complete business finance platform, combining modern financial services and software to help businesses spend, save, and grow. Trusted by 5000+ Canadian companies, Float provides high‑limit corporate cards, automated expense management, next‑day bill payments, high‑yield accounts and fast, friendly support—all built in Canada, for Canada. Float is backed by world‑class venture and fintech investors, including Growth Equity at Goldman Sachs Alternatives and OMERS Ventures, partners behind our $70 million Series B raise.
Our team is a collection of ambitious, collaborative and mission‑driven people from all walks of life but with one goal: helping Canadian companies not just survive but thrive. And we’re looking for bold innovators to help shape the future of business finance in Canada.
AI Use in Our Hiring Process  We use technology, including artificial intelligence (AI), to support parts of our hiring process. This may include AI‑assisted scheduling and candidate communications, and AI‑generated interview notes, guides or summaries to help our team focus on the conversation. All hiring decisions are made by our hiring team.
About the Role  Float is building modern financial tools for businesses, and security is at the heart of earning customer trust. As a Senior Security Engineer, you’ll help us build and enforce the guardrails that let Float ship fintech features faster and with confidence. You’ll lead initiatives that turn “tooling installed” into controls enforced and measured, working hands‑on across Float’s infrastructure tool stack.
This role combines technical depth with a builder’s mindset. You’ll design secure patterns for infrastructure and application teams, automate evidence for PCI DSS 4.0 and SOC 2, and reduce risk through practical, measurable controls. You’ll partner closely with Platform, Engineering, IT, and Risk & Compliance to make security part of how Float operates every day.
What You’ll Be Responsible For   Owning and improving AWS and Git Hub security guardrails, including IAM, OIDC, network segmentation, and CI/CD hardening.
Leading automation for vulnerability management and cloud posture using our security tools and infrastructure‑as‑code.
Partnering with developers to embed secure SDLC practices, including dependency scanning, secret management, and threat modeling for high‑risk features.
Helping mature endpoint and identity security while ensuring full coverage and strong baselines.
Tuning and expanding detection and response capabilities, developing playbooks, alert pipelines, and response automation.
Contributing to evidence automation for PCI DSS 4.0 and SOC 2, ensuring “compliance by default.”
Championing security metrics that matter: coverage, time‑to‑remediate, and control effectiveness.
About You  Here’s what sets you up for success at Float:
You Put Customers First, Always.  You care deeply about delivering meaningful value. Whether you're building internal systems or customer‑facing features, you’re always thinking about how to make life better for our users.
You Act Like an Owner.  You take responsibility for outcomes, step up to challenges, and seek solutions proactively—doing what’s best for the business, not just your…