We are looking for a Senior Backend Engineer to build backend services and logistics integrations for our platforms, including an e-commerce platform for our cold crypto wallets.Responsibilities Tech Stack: Node.js, TypeScript, NestJS, TypeORM, PostgreSQL, AWS SNS/SQSResponsibilities • Design and build backend services and APIs with Node.js, TypeScript, and NestJS. • Build integrations with logistics providers, including shipping, tracking, fulfillment, and webhooks. • Use AI-assisted development as part of the engineering workflow, with strong validation through code review and automated tests. • Design reliable asynchronous workflows with AWS SNS/SQS, including retries, DLQs, and idempotent processing. • Design and optimize PostgreSQL queries, transactions, and data models. • Own features end-to-end: from specification and API contracts to implementation, testing, and production. Requirements • Strong production experience with Node.js and TypeScript. • Strong NestJS experience. • Experience building and maintaining third-party API integrations and webhooks. • Solid understanding of AWS SNS/SQS and asynchronous systems. • Strong PostgreSQL and SQL skills. • Experience with spec-driven, AI-assisted development. • Strong engineering judgment and ownership. Nice to have • Logistics or e-commerce experience. • Observability experience. • Familiarity with DDD or hexagonal architecture. Originally posted on Himalayas