Staff Fullstack Engineer

Skills

About the Role

You will design, build, and scale full-stack systems that power web apps, APIs, and indexers. You will design and maintain APIs and SDKs with clear versioning and documentation. You will build high-performance data pipelines over on-chain events, implement caching and query optimization to keep UIs sub-second. You will lead design reviews, mentor engineers, improve testing and observability, profile and reduce latency, and own incident readiness with dashboards, alerts, and on-call practices.

Requirements

• 8–10+ years building and operating full-stack applications at scale
• Track record designing systems that handle millions of daily requests with high availability
• Experience leading cross-team technical initiatives without formal authority
• Deep expertise with modern TypeScript across client and server
• Experience with API design, SDKs, and versioning strategies
• Experience building high-performance data pipelines and on-chain event processing
• Familiarity with React, Next.js, GraphQL (Apollo Server), REST, WebSockets, Node.js (Hono/NestJS), PostgreSQL, Redis, event streaming, indexers (Ponder/Subsquid), viem, Jest, Cypress, OpenTelemetry, Grafana, Sentry, auth, rate limiting, and input validation

Responsibilities

• Architect and own end-to-end delivery across web apps, APIs, and indexers
• Design a scalable API and SDK strategy with versioning and documentation
• Build high-performance data pipelines over on-chain events using caching and query optimization
• Lead design reviews and mentor 5–10 engineers to raise engineering standards
• Profile systems and introduce architectural changes to reduce p95 latency
• Partner with product, protocol, and business leads to clarify scope, tradeoffs, and success metrics
• Own incident readiness with dashboards, alerts, and on-call practices

Benefits

• Flexible work arrangements
• Periodic time together in Paris
• Health coverage
• Support for learning and professional development