Senior Full-Stack Engineer (Backend/Data Focus)

Square One Resources is seeking a Senior Full-Stack Engineer with a strong backend and data architecture focus to take end-to-end ownership of system design and technical direction for a modern platform.

• 5+ years of experience in software engineering (Senior level)
• Strong expertise in Python
• Advanced knowledge of PostgreSQL (schema design, performance tuning)
• Experience designing scalable system architectures and service-based solutions
• Practical experience with FastAPI and SQLAlchemy
• Solid understanding of React and/or Next.js
• Experience with Docker, Kubernetes, and CI/CD pipelines
• Ability to work independently with minimal supervision
• Experience working in evolving environments and shaping technical direction
• Strong problem-solving skills and proactive risk management

Nice to have:

• Experience with graph-based or adaptive data models
• Familiarity with LLM APIs and GenAI-driven systems
• Experience using AI-assisted coding tools (e.g., Cursor, Copilot)
• Exposure to modern data-driven or AI-powered platform architectures

• Own system architecture and backend design decisions
• Design, implement, and maintain data models using PostgreSQL
• Define and implement API layer using FastAPI
• Ensure scalability, performance, and maintainability of services
• Provide technical leadership and structure for the engineering team
• Design service architecture and data flows
• Contribute to frontend development using React / Next.js when required
• Support CI/CD processes and containerized deployments (Docker, Kubernetes)
• Identify technical risks and proactively address them
• Operate with end-to-end ownership across backend and data layers