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Fulfil.IO

Posted 27 Aug 2026

SDE - 3 (Backend)

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Employment
Full time
Team
Software Engineering
Posted
27 Aug 2026

About the role

Responsibilities:

  • Own the Full Stack: Take charge of our entire Python-based platform, from front-end integrations to back-end systems, maintaining and scaling a codebase of millions of lines that powers global commerce.
  • Ship Features Fast: Drive the rapid design, development, and deployment of new features, delivering value to high-growth merchants at breakneck speed.
  • Integrate AI: Build and embed AI-driven capabilities into our ERP, enhancing automation and intelligence for order management, financials, and beyond.
  • Master Scale and Stability: Optimize REST and GraphQL APIs (600+ endpoints), microservices, and Kubernetes/Docker deployments to handle millions of transactions with zero downtime.
  • Elevate Code Quality: Refactor legacy systems, write testable code with pytest, and collaborate on peer reviews to keep our stack robust and maintainable.
  • Bridge Ecosystems: Integrate seamlessly with e-commerce platforms (Shopify, Amazon) and logistics partners (FedEx, DHL), ensuring our merchants' operations hum.
  • Solve at Scale: Tackle the real-world challenges of a B2B SaaS leader, including complex business logic, reusable components, and global infrastructure management.


Requirements:

  • Experience building large-scale server-side applications and microservices with Python.
  • Expertise with ORMs (e. g., SQLAlchemy, Django) and SQL databases (Postgres preferred).
  • Proficiency in our stack: Python, Celery, Postgres, Redis, RabbitMQ.
  • Hands-on experience with testing (pytest) and Git for version control.
  • A track record of delivering scalable, maintainable code with a focus on ownership, leading projects from design to deployment.

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