Senior Backend Engineer: Distributed Systems & Payments

Supero; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

Supero.dev seeks experienced backend engineers to own the transactional services and data paths across orders, payments, and inventory. You will enforce idempotency and correctness, build robust API contracts, and enable multi-tenant data architectures with secure MCP surfaces.

You will work across FastAPI and legacy Bottle services, shaping the boundary between modern async and traditional synchronous code.

Qualifications

• 5+ years of production backend engineering in distributed systems.
• Deep Python across two eras of it (FastAPI, Pydantic, asyncio; Bottle on gunicorn with synchronous tooling).
• Databases beyond ORM; understanding indexing, isolation, and queries in MongoDB and PostgreSQL/JSONB.

Responsibilities

• Own transactional backend services (cart, orders, payments, inventory, etc.).
• Ensure idempotency, correctness, and error handling (e.g., 409 conflicts).
• Design and enforce API contracts with robust error responses.
• Support multi-tenant data paths and MCP surface for external agents.

Skills

Production backend

Distributed systems

Python

API design

Databases

Concurrency

Security

Tools

MongoDB Atlas

PostgreSQL

FastAPI

Pydantic

Bottle

Gunicorn

Job description

Supero.dev seeks experienced backend engineers to own the transactional services and data paths across orders, payments, and inventory. You will enforce idempotency and correctness, build robust API contracts, and enable multi-tenant data architectures with secure MCP surfaces.

You will work across FastAPI and legacy Bottle services, shaping the boundary between modern async and traditional synchronous code.