Software Development Engineer III - Python, FastAPI

Role Description

We are building a next-gen AI-powered CAD software platform that combines scalable cloud- native services with advanced 3D modeling workflows. As a Senior Backend Engineer, you will design, develop, and optimize backend systems that power multi-user collaboration, secure data handling, and seamless integration with CAD Core and AI services. This role focuses on Python, FastAPI, cloud-native architecture, and scalable backend design.

Responsibilities

• Architect and build scalable backend services in Python (FastAPI), ensuring performance with large datasets and multi-user workloads.
• Implement multi-tenant access control (RBAC / ABAC) to secure projects and enforce fine-grained permissions.
• Design service-to-service communication between backend services, CAD Core APIs, AI Engine, and Kafka.
• Manage file storage and processing pipelines for CAD / 3D files (DWG, IFC, BREP), including large binary data handling.
• Build real-time collaboration features (concurrency handling, versioning, conflict resolution).
• Ensure system reliability and security, including encryption, secure APIs, and compliance with best practices.
• Develop and maintain cloud-native deployments on AWS (ECS, S3, RDS, Kafka), with an eye for cloud-agnostic design.
• Create CI / CD pipelines for backend microservices using Git, Docker, and Bitbucket Pipelines.
• Proactively identify scalability bottlenecks and optimize database queries, file processing, and distributed systems.
• Collaborate with frontend teams (PyQt desktop, Unreal Engine visualization, React web) to deliver seamless CAD workflows.

Qualifications