Build and run real-time enforcement against abuse, keeping email safe for good senders.
Design detection pipelines and ML classifiers to automate anti-abuse decisions end-to-end.
Ensure every enforcement action is traceable through logs, metrics, and audit trails.
Resend is building a modern email sending platform for developers, with dependable infrastructure and thoughtful design. The fully remote team of 50 spans 15 countries, backed by a16z and Y Combinator, and values high quality and shared learning.
Design, build, and operate security engineering services in Go and Python on AWS and Kubernetes.
Own the event-driven NATS platform connecting security services, ensuring delivery guarantees and observability.
Build agentic security workflows and CI security gates (SAST, SCA, secret detection) that are trusted by default.
Sezzle is a fintech company that offers interest-free installment plans and aims to financially empower the next generation. It is building an innovative, dynamic team of engineers and data enthusiasts with a culture that values unique, purpose-driven individuals.
Design and build authentication flows, OAuth integrations, and authorization platforms across Motive's products.
Develop BYOK capabilities and security controls for customers with advanced data-protection requirements.
Drive security projects from technical design to implementation, including threat modeling, vulnerability remediation, and security automation.
Motive empowers the people who run physical operations with tools to make their work safer, more productive, and more profitable. The company serves nearly 100,000 customers, from Fortune 500 enterprises to small businesses, across a wide range of industries.
Monitor availability, latency, and error rates across APIs and lead incident response with blameless post-mortems.
Design automation to mitigate abusive traffic including scraping, bots, and API abuse using CDN and WAF controls.
Manage AWS infrastructure as code with security policy checks and integrate security tooling into CI/CD pipelines.
Enformion is a data intelligence and AI-powered identity verification company delivering fraud prevention, risk management, and onboarding solutions to digital marketplaces and merchants. The company is a fast-growing, security-focused organization with large data repositories and advanced behavioral analysis.
Design, build, and operate services powering the Exposure Management platform across the full production lifecycle.
Work with large volumes of security data to improve scanning, asset discovery, and vulnerability prioritization.
Collaborate with product, threat research, and client-facing teams to turn security requirements into production-ready features.
They build an external attack-surface and Exposure Management platform that helps organizations discover internet-facing assets and prioritize vulnerabilities. They foster a collaborative, curious engineering culture with an AI-first approach to security and scale.
Set technical direction across Coder’s agent harness, integrations, and workflows.
Design and build production systems in Go, with work across React and TypeScript where needed.
Lead complex projects from early ambiguity through production.
Coder is a leading platform for AI development infrastructure, enabling enterprises to run human and AI-driven workflows in secure, governed environments. The company provides self-hosted, agent-ready workspaces and fosters a collaborative, AI-forward culture.
Build and operate email transport infrastructure, including SMTP delivery and MTA systems.
Design systems for throttling, IP pools, warmup, and reputation-aware routing.
Partner with Trust & Safety to protect the sending network and participate in incident response.
Resend is building the most accessible email platform for developers, with over 4 million users. We're a fully remote team of 50 across 15 countries, backed by a16z and Y Combinator.
Build real-time risk controls and decisioning systems for money movement products.
Develop signals and models to detect scams and abuse across the platform.
Establish technical foundations for a new, high-impact Trust & Safety function.
Phantom is on a mission to connect the world to the freedom of open markets, offering access to global markets that never close. With around 180 people, fully remote, and backed by a $150M Series C from top investors, Phantom fosters a culture of ownership and high agency.
Partner with engineering to identify and mitigate security risks before launch, building secure frameworks and libraries that make control adoption easy.
Own identity and secrets management, including credential issuance, rotation, and workload authentication across cloud and Kubernetes environments.
Harden cloud security controls and build security models for AI agents with permission boundaries and tenant isolation.
Fieldguide builds software that automates assurance and audit work for cybersecurity, privacy, and financial audits, helping businesses enable trust. They are a remote-first company backed by top investors and trusted by over 50 of the top 100 accounting and consulting firms, with a values-driven culture.
Get hands-on with our Go codebase, AWS and Kubernetes environment, SIEM, and security services, contributing security feedback to design docs and shipping your first fix or detection.
Own a security domain end to end, such as cloud hardening or detection engineering, and ship reusable Go security middleware adopted by service teams.
Drive multi-quarter initiatives like default-deny networking, expand Kubernetes security, and automate compliance evidence for audits.
Bastion provides regulated infrastructure for businesses to hold, move, and issue stablecoins, combining custodial wallets, payment orchestration, and issuance. As a 40-person startup, we operate through our own regulated entities with built-in compliance and risk controls.
Serve as deputy to the CISO, representing security to executives, customers, and regulators.
Lead and grow managers and senior engineers across Security Engineering and Security Operations.
Own the security roadmap, including cloud security, detection and response, identity, and platform security.
Abnormal Security uses behavioral AI to protect organizations from sophisticated email and collaboration attacks. Trusted by 5,000 enterprises, the company values security engineering, partnership, and a paved-path approach to reducing risk.
Design and implement backend services for licensing, entitlements, feature access, and usage limits across NodeZero's product and APIs.
Build and evolve provisioning, admin experience, MSP/MSSP capabilities, and audit logging for a multi-tenant SaaS platform.
Operate production services with monitoring, incident response, and a high bar for design quality and test coverage.
Horizon3 is a fast-growing, remote cybersecurity company that helps organizations proactively find, fix, and verify exploitable attack vectors through its NodeZero autonomous pentesting platform. The team is a fusion of former special operations cyber operators and startup engineers, fostering a culture of respect, collaboration, ownership, and results.
Build and operate backend infrastructure for high-volume email delivery.
Develop SMTP delivery, routing, retries, throttling, and controls.
Partner with Trust & Safety to protect the sending network.
Jobgether is an AI-powered recruitment platform that matches candidates to roles using objective core requirements analysis. It operates with a collaborative, low-ego culture and fully remote operations.
Own vulnerability management across code, dependencies, images, and cloud config, automating triage and remediation.
Build and expand security gates in CI/CD pipelines, define secure cloud baselines, and drive least privilege identity.
Partner with DevOps on paved roads for secure-by-default development and lead incident response.
Aegis AI is a startup founded by ex-Google engineers who built Safe Browsing and reCAPTCHA, focused on stopping adversarial AI attacks. The team is flat, flexible, and fast, with engineers owning decisions and clear KPIs.
Own device and session integrity, attestation, and authentication hardening across mobile clients and backends.
Design and run abuse and fraud detection systems against adversarial actors at scale.
Define the security roadmap and lead a team of engineers across mobile and backend.
Beast Industries is a media and entertainment company founded by MrBeast, operating across digital media, philanthropy, and consumer products. We are driven by innovation, creativity, and philanthropy to create social impact.
Conduct hands-on application security reviews threat modeling and code audits across the entire stack (backend frontend APIs infrastructure).
Build and improve security automation for vulnerability management including SAST DAST container scanning and secrets detection.
Drive remediation of findings from bug bounty scanners and audits partnering with engineering teams to prioritize and fix.
Close builds a communication-first AI-powered CRM that helps sales teams sell more and faster. With a 120-person 100% remote team they are bootstrapped profitable and focused on eliminating manual data entry for scaling businesses.
Take deep ownership of systems and product areas, becoming the go-to technical expert for what you own.
Architect, build, and maintain highly available, scalable REST APIs and backend services across distributed systems.
Build agentically with AI coding tools, staying at the forefront of emerging AI tooling and practices.
Postscript is an AI messaging platform for Shopify brands, helping e-commerce marketers drive revenue through SMS marketing and AI features. Backed by Greylock and Y Combinator, the company has been fully remote since 2018 and serves 20,000+ Shopify brands with a culture of ownership and AI-first development.
Build and operate reliable cloud services on AWS and Cloudflare, covering compute, storage, networking, and managed infrastructure.
Evolve the infrastructure that powers web applications and AI agents on Webflow Cloud, including CDN and edge computing.
Own features end-to-end, from customer problem through design, implementation, rollout, and ongoing improvement while using AI-assisted development practices.
Webflow is an agentic web marketing platform that helps modern marketing teams build, manage, and optimize high-performing web experiences. Webflow is a growing, privately held company that values grit, craft, quality, and equality, and offers a remote-first culture with comprehensive benefits.
Lead threat modeling and security reviews across Wiz's products and cloud infrastructure, identifying attack surfaces and developing scalable mitigation strategies.
Build automation, policy-as-code, and security tooling that enables development teams to 'shift left' and integrate end-to-end security into their workflows.
Drive vulnerability management and remediation efforts, prioritizing issues, implementing mitigations, and designing strategic preventative controls in software supply chains from development through production.
Wiz is redefining security for the AI era, enabling teams to secure cloud and AI applications by connecting code, cloud, and runtime into a single shared context. As one of the fastest-growing startups ever, we are trusted by over 65% of the Fortune 100 and scan over 230 billion files daily, with a culture that values world-class talent and is now powered by Google.