Senior Backend Engineer (Logistics)

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/SQS

• 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.

• 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.

• Logistics or e-commerce experience.
• Observability experience.
• Familiarity with DDD or hexagonal architecture.