Full-Stack Engineer - Python (SDE-I)

About Role As an SDE-I (Python Full-Stack) at Fulfil, you?ll design and build the next-generation systems that power millions of customer orders and financial transactions for some of the world?s fastest-growing merchants. Our Python-based platform handles massive scale, think millions of transactions per hour, and your work will ensure it?s robust, scalable, and maintainable. You?ll collaborate with a global team across the USA, Canada, and Bangalore, tackling sophisticated challenges in an environment that values clean code, innovative design, and collective problem-solving. What You?ll Do Own the Full Stack: Take charge of our entire platform?from front-end to back-end systems maintaining and scaling a codebase . 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 APIs (600+ endpoints), microservices, and Kubernetes/Docker deployments to handle millions of transactions with zero downtime. Build for Maintainability: Write clean, testable code and evolve our systems to stay easy to extend, letting us move fast while keeping quality high. Bridge Ecosystems : Make e-commerce platforms(Shopify, Amazon), logistics providers (FedEx, DHL), and payment systems, best friends ? our merchants deserve a world where every platform plays nicely. Solve at Scale: Tackle the real-world challenges of a B2B SaaS leader?think complex business logic, reusable components, and global infrastructure management. What You Bring Experience building and shipping applications with Python?whether through startup work, freelancing, internships, or personal projects. Familiarity with ORMs (e.g., SQLAlchemy, Django) and SQL databases (Postgres preferred). Understanding of our stack: Python, Celery, Postgres, Redis, RabbitMQ. Experience writing and maintaining tests (pytest) and using Git for version control. Focus on writing clean, reliable, and maintainable code, with an eagerness to learn from peers and contribute to projects from design through deployment. Experience Levels You have 1?3 years of experience building applications with Python and SQL/RDBMS?through work at a startup, freelancing, internships, or personal projects. You?ve built and shipped something end-to-end, enjoy working in fast-paced environments, and are eager to grow your skills while contributing to real-world systems. Ideal Candidate would be someone who Has at least 1 year of experience in a similar role, preferably at a startup, where they?ve built and shipped applications in Python. Is a recent college graduate who has built and shipped real projects?whether through freelancing, internships, or personal work?showcasing strong Python skills and technical initiative. Nice to Have ? Exposure to scaling systems in a fast-growing or high-traffic environment. ? Familiarity with cloud platforms (Google Cloud, Heroku, etc.). ? Interest in optimizing distributed systems or e-commerce workflows. Our Approach to AI What We Do Leverage LLMs (OpenAI, Claude, Gemini API) to embed AI-driven capabilities into Fulfil?s ERP, powering natural language interfaces, intelligent automation, and merchant-facing insights (e.g., Fulfil x MCP integrations with Claude). Focus on applied AI for commerce operations ? integrating models to solve real problems like order management, financial analysis, customer insights, and logistics optimization. What We Don?t We are not a core ML/AI research company ? we don?t train or fine-tune foundation models. We focus on integration and productization of AI, not building new ML frameworks or developing custom model architectures