Fullstack Engineer at Aisle

Why Aisle?

AISLE is building the AI that finds, fixes, and verifies software vulnerabilities autonomously - an end-to-end system that closes the gap between when a vulnerability appears and when it's safely patched. Vulnerabilities are the #1 root cause of cyber incidents, yet most organizations take weeks or months to remediate what attackers now exploit in days. We're ending that backlog.

Our systems already find and fix vulnerabilities in the world's most heavily audited codebases - 375+ independently validated CVEs across projects like OpenSSL, curl, Linux, and Chromium - at machine speed and superhuman scale. AISLE runs entirely inside our customers' perimeter (cloud, on-prem, or fully air-gapped) and can run on our optimized models or theirs, so even the most sensitive organizations, including those operating critical infrastructure, stay in full control of their code and their models.

Backed by world-class founders, advisors, and angel investors, we're defining a new category: sovereign, AI-native security. Our goal isn't to improve vulnerability management - it's to end the backlog and move toward a future where software defends itself.

We’re a small, talent-dense team spread across Europe, the US and Canada. We value high ownership, high velocity, and low-ego collaboration. If you want to work with world-class minds in AI and security, thrive in fast-moving environments, and care about solving one of the toughest challenges in tech, Aisle is the place for you.

What we're looking for

• 3+ years of professional software engineering experience spanning both frontend and backend development.

• Strong backend foundation: Experience with Python (or similar high-level languages) building scalable services or APIs.

• Modern frontend expertise: Deep familiarity with TypeScript and hands-on experience with modern component frameworks—Svelte, React, or Vue. We primarily use SvelteKit to build highly responsive, intuitive user interfaces.

• Automated Testing Rigor: Strong experience writing and maintaining automated test suites across the entire stack. This includes backend unit/integration testing (e.g., pytest) and frontend testing (e.g., Vitest, Testing Library, Playwright, or Cypress).

• System & Cloud architecture: Experience with cloud platforms (AWS preferred), containerized environments (Docker), and basic microservices architectures.

• Data & Messaging: Familiarity with databases (SQL/NoSQL) and modern API design (REST, GraphQL, or gRPC).

• DevOps & Quality: Experience with CI/CD pipelines, automated testing (both backend unit tests and frontend integration/E2E testing), and version control.

• Security Mindset: A solid understanding of secure coding practices (OWASP top 10) and a genuine interest in cybersecurity.

• Bonus: Experience with data visualization libraries (like D3.js), AI/ML API integration, or building enterprise SaaS products.

What you’ll do

• Own features end-to-end: Design, implement, test, and deploy features across the entire stack—from database schemas and Python microservices to polished Svelte frontend components.

• Build AI-driven interfaces: Design and optimize APIs and interactive frontend experiences that make complex, AI-driven vulnerability detection and remediation intuitive for users.

• Collaborate on architecture: Contribute to technical design decisions for both scalable backend distributed systems and modular, performant frontend state management.

• Bridge the gap: Work closely with AI research and DevOps teams to seamlessly integrate complex data models and pipelines into the user-facing application.

• Maintain high standards: Participate in comprehensive code reviews, write clean and testable code across the stack, and share frontend/backend best practices with the team.