Full Stack Software Engineer

Focal Systems is the industry leader in retail AI solutions, headquartered in San Francisco, California. They are seeking a Full Stack Software Engineer with a strong backend foundation in Python and experience in React to build scalable backend services and enhance user experience across their applications.

Responsibilities:

• Build and maintain scalable backend services using Python (Flask/FastAPI) that process data from 300,000+ IoT devices
• Design and develop REST APIs consumed by internal tools and customer-facing applications
• Build and improve React/TypeScript frontend features — from translating designs into code to refining existing UI components
• Write database queries to analyze how features are actually being used and to debug production issues
• Build deployment monitoring and diagnostic tools that give visibility into system health across geographies
• Create tools that provide transparency and ease of access into the company's rich datasets stored across varying geographic locations and data formats
• Collaborate with engineering teams to ensure data persists in usable formats for frontend, middleware, diagnostics, and Deep Learning pipelines
• Remotely debug customer issues across the full stack and find smart solutions that actually work
• Partner with the product team to shape user experience — you'll bridge the gap between backend capabilities and what users actually see
• Support our customer success team by helping solve client problems
• Evaluate incoming requests — assess the effort required vs. potential value delivered
• Expand test coverage for critical backend services and frontend user flows
• Refactor existing code to reduce complexity and keep things maintainable
• Be part of the team that ships weekly releases to customers
• Present your work to the company and share what you've shipped

Requirements:

• 6+ years of professional software development experience
• 3+ years of hands-on experience with Python (FastAPI, Flask or similar) or other Backend Language
• 3+ years of experience with React and TypeScript
• Solid experience with REST API design and development
• Experience working with data-intensive applications and/or microservices architecture
• Experience with relational databases (MySQL or similar)
• Experience with CI/CD pipelines
• Applied experience with unit and integration testing
• Ability to work independently and take ownership of features end-to-end
• Fluent in Polish with advanced English skills (written & spoken)
• Flexibility in adjusting working hours to meet the needs of the global and time zone-diverse team (urgent tasks or meetings may occur outside of regular CEST working hours)
• Strong work ethic and commitment to completing assigned tasks and projects within established deadlines
• Experience with GCP (Google Cloud Platform)
• Experience with Grafana and dashboard creation
• Experience with Kafka or other message brokers
• Experience with Docker, Kubernetes, and Helm charts
• Experience implementing observability solutions (Prometheus, or similar)
• Experience with MUI (Material UI) or Tailwind
• Experience writing Node.js and Bash scripts
• Familiarity with computer vision or IoT data pipelines