Senior Backend Engineer

About Firmus

Firmus is the leading AI platform for preconstruction design review and risk analysis, helping construction teams identify design-related issues and mitigate financial risk. Recently acquired by The Nemetschek Group through its subsidiary Bluebeam, Firmus is uniquely positioned at the intersection of startup agility and enterprise scale. We now have access to massive resources, an established customer base, and deep industry expertise, while maintaining our fast-moving, innovative startup culture.

The Team

You’ll join a lean, high-impact engineering team building a scalable AI engine that processes millions of construction plans to construct a comprehensive construction knowledge graph. We’re on a mission to build an intelligent agentic system that understands construction at massive scale. This is a unique opportunity to work with the speed and creativity of a startup while leveraging the resources, customer access, and market reach of a multi-billion-dollar global enterprise.

Key Responsibilities

• Design and implement scalable backend services for processing construction drawings and technical documents
• Make design decisions on the basis of performance, scalability, and future expansion.
• Build robust APIs for model inference, document ingestion, and results delivery
• Develop efficient data pipelines for preprocessing drawings, extracting features, and managing model inputs/outputs
• Implement model serving infrastructure supporting OCR engines, computer vision models, and generative AI systems
• Code review, mentoring junior engineers, and providing technical guidance to the team

Required Qualifications

• 7+ years of backend development experience with Python, Go, or Java
• Strong experience with cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes)
• Proficiency with databases (PostgreSQL, MongoDB) and message queues (Redis, RabbitMQ, Kafka)
• Experience with API design, microservices architecture, and event-driven systems
• Proficiency or strong interest in using AI-enabled developer tools to enhance architecture and engineering workflows.
• Degree or equivalent relevant experience required

Preferred Qualifications

• Experience building and improving agents and or LLM products in production
• Experience with Temporal or other durable execution orchestration tools.

To apply for this position, please submit your resume and cover letter to jobs@firmus.ai