Staff Full Stack Engineer

Doist; New York (NY); Hybrid; USD 200,000 - 250,000; Full time

Job summary

Doist in New York, NY, is seeking an experienced Full-Stack Engineer to deliver end-to-end features in a fast-moving Web3 fintech platform. You will own architecture across frontend, backend, and workflows, and collaborate with teams to ship reliable, scalable systems for real-world assets and onchain investments.

The role emphasizes TypeScript, React, cloud-native serverless patterns, and AI-assisted tooling while upholding security and code quality across the stack.

Qualifications

• Experience delivering end-to-end features for modern web apps.
• Strong knowledge of TypeScript, React and frontend/backend integration.
• Experience with serverless and edge infrastructures.

Responsibilities

• Full Stack Feature Development across a TypeScript monorepo.
• Build and manage edge infrastructure using Cloudflare platform.
• Implement Web3 workflows and onchain integration.
• Design idempotent, replay-safe orchestration across services.
• Develop responsive, accessible UI with React and Tailwind.
• Integrate AI workflows and evaluation-driven pipelines.

Skills

Full Stack Development

TypeScript

React

Cloudflare

AI Workflows

Tools

Bun

Turborepo

Vite

Viem/Wagmi

Wrangler

D1/R2/KV

Zod/tRPC

Vitest/Playwright

Sentry

Job description

Location: New York, United States (Hybrid)

Hybrid | Full-time

Compensation: $200K - $250K

Our client is a well-funded Web3 financial technology company building next-generation onchain investment infrastructure. Backed by premier venture capital firms and leading digital asset institutions, the organization focuses on long-term portfolio management, automated rebalancing, and intuitive user experiences that bring the safeguards and discipline of traditional finance to decentralized technology. The platform abstracts away the underlying friction of DeFi to make real-world assets (RWAs), onchain stocks, and fixed-income products seamless and accessible to a global audience.

Key Responsibilities

• Full Stack Feature Development: Architect and deliver end-to-end features across a modern TypeScript monorepo (Bun, Turborepo) with an emphasis on type-safe boundaries, domain-driven design, and system correctness for financial workloads.
• Edge Infrastructure & Serverless Services: Build and manage stateful, event-driven systems utilizing the Cloudflare platform (Workers, Workflows, Durable Objects, Queues, R2, D1, KV, Pipelines, and scheduled triggers) using Wrangler and Alchemy.Web3 Integration & Execution: Implement Web3 workflows using Viem/Wagmi, ZeroDev Kernel smart accounts, session-key permissions, SIWE/Privy authentication, and bundler/paymaster infrastructure across EVM environments.
• Backend & Workflow Orchestration: Design idempotent, replay-safe execution paths across distributed services using Hono, tRPC, Zod, and real-time event systems.
• Frontend Engineering: Develop responsive, accessible, and high-performance interfaces using React, Vite, TanStack Router/Query/DB, and Tailwind CSS with polished motion and real-time state updates.
• AI & Agent Infrastructure: Integrate practical AI workflows utilizing the Cloudflare Agents SDK, Workers AI, AI Gateway, Vectorize, structured outputs, tool calling, and evaluation-driven pipelines.
• Modern Engineering Workflows: Leverage AI-assisted coding tools (e.g., Codex, Claude Code) for rapid research, testing, and implementation while maintaining strict ownership of architecture, security, and code quality.
• Quality Assurance & Observability: Maintain high test coverage using Vitest, Playwright, and workerd-based integration tests while monitoring system health via structured logs, correlation IDs, Sentry, and Cloudflare observability.