Senior Backend Engineer

Lasso is the AI Security Platform built for the agentic era. As organizations race to deploy AI agents and agentic applications, Lasso provides the only continuous security loop spanning discovery, AI security posture management, automated red teaming, and runtime protection. By connecting these capabilities in a single platform, Lasso gives security teams complete visibility over their AI environment, proactive risk management, next-generation adversarial testing, and real-time threat response ensuring every agent behaves within its intended scope at every stage of its lifecycle. As a Senior Backend Developer, you will play a crucial part in designing robust backend systems that power our state-of-the-art AI-driven security solutions. You’ll own the full development cycle, implement efficient APIs and microservices and ensure high-quality code through reviews and testing. Responsibilities: Implement efficient, reliable APIs and microservices with NodeJS/Typescript while ensuring best practices for a production environment running on AWS and Azure. Design, develop and deploy scalable backend solutions for our AI-driven security platform. Own the full development cycle, from initial concept and design through implementation, deployment, maintenance, and monitoring. Participate in code reviews and provide constructive feedback to maintain code quality and adherence to coding standards. Troubleshoot and debug complex backend issues, while employing rigorous testing methodologies to ensure system reliability. Document system designs and implementation details to facilitate knowledge sharing and onboarding of new team members. Collaborate with cross-functional teams - Product, QA and Data Science. Stay updated about emerging technologies and industry trends, leveraging them to drive continuous innovation and improvement within our products. Requirements: 5+ years of hands-on backend development experience, building scalable and resilient production systems. A builder mindset and a can-do attitude, with the ability to take ownership, solve problems independently, and turn ideas into working solutions. Demonstrated ability to build systems from the ground up, navigating uncertainty and defining the approach along the way. Strong teamwork and communication skills. Experience building large-scale backend systems with Node.js and TypeScript. Experience working with SQL databases, preferably PostgreSQL. Experience building microservices and deploying them on Kubernetes. Familiarity with CI/CD tools such as GitHub Actions. Advantages: Experience developing with NestJS. Hands-on production experience with AI agent systems. Experience with NATS.