Lead Full Stack Engineer

StackBlitz is a company focused on revolutionizing software development through innovative technologies like WebContainers. The Lead Full Stack Engineer will be a hands-on technical leader responsible for core platform architecture, code quality, and team growth, while also engaging in coding and cross-team coordination.

Responsibilities:

• Own core platform architecture: WebContainers integration, browser runtime systems, performance optimization, and backend infrastructure
• Write code regularly on complex features, migrations, and architectural improvements
• Review core platform PRs and maintain quality standards across the domain
• Drive technical initiatives and manage technical debt strategically
• Coordinate with other Team Leads on cross-domain architectural decisions
• Conduct performance reviews and own career development for core team members
• Hold regular 1:1s to support growth, remove blockers, and provide feedback
• Make hiring decisions and address performance issues proactively
• Build a high-performing, autonomous team culture
• Assign team members across features based on skills, capacity, and priorities
• Participate in coordination meetings with other Team Leads
• Regular 1:1s with Head of Engineering to align on priorities and resources
• Run weekly core team meetings for knowledge sharing
• Champion AI coding tools and model effective usage
• Build AI-powered core platform features and intelligent runtime capabilities
• Dogfood Bolt.new daily and drive product improvements

Requirements:

• 10+ years full-stack/systems development, 3+ years leadership
• Strong Node.js, TypeScript, and modern JavaScript ecosystem knowledge
• Expertise in browser APIs, WebAssembly, Web Workers, and browser-based runtime environments
• Experience designing and scaling REST/GraphQL APIs serving millions of requests
• Understanding of distributed systems and cloud infrastructure (AWS, GCP, Cloudflare or Azure)
• Proven ability to optimize backend performance, caching strategies, and database design
• Experience with containerization, virtualization, and sandboxing concepts
• Knowledge of load balancing, rate limiting, and designing for high availability
• Experience with developer tooling, build systems, and runtime optimization
• Track record of architectural decisions balancing speed and maintainability
• Daily user of AI coding assistants (Cursor, Copilot, Claude)
• Experience building AI-integrated applications and platform features
• Performance reviews, career development, and difficult conversations
• Growing engineers to senior/staff+ levels
• Hiring backend/platform engineers
• Building remote team culture
• Coaching mindset with balance of individual and business needs
• Deep understanding of browser internals and web platform capabilities
• Experience designing scalable, performant runtime systems
• Strong architectural thinking for systems handling scale and growth
• Excellent communication with technical and non-technical stakeholders
• Pragmatic mindset: ship MVPs, bias toward action, match quality to business need
• Business thinking: tie technical work to clear outcomes
• Collaborative: knowledge sharing and unblocking others is core work
• Experience building developer tools, IDEs, or online code editors
• Open-source contributions to runtime or tooling projects
• Background in distributed systems or cloud infrastructure at scale
• Experience with service workers, IndexedDB, and offline-first architectures
• Experience with Kubernetes, Docker, or other container orchestration platforms
• Knowledge of CDN optimization, edge computing, and global infrastructure