Backend Developer — 3D BIM + Q-Tables Integration
About the Role
We’re building a revolutionary Common Data Environment (CDE) that connects 3D BIM models with construction management data. You’ll be developing the API backbone that enables real-time synchronization between our ThatOpen-based 3D viewer and Q-Tables construction database, transforming how construction teams visualize and manage project data.
This is a greenfield project where you’ll architect the core integration layer for our BIM-to-database synchronization system.
Technical Context
Our system connects:
- 3D BIM Viewer (ThatOpen/Three.js web app) displaying IFC models
- Q-Tables Database (MongoDB) storing construction progress, issues, and metadata
- IFC GUID mapping system linking 3D elements to construction records
- Real-time sync capabilities for multi-user construction workflows

You’ll be building the API layer that makes this integration seamless and reliable.
Requirements
- 4+ years of software engineering experience with C#/.NET
- Solid knowledge of ASP.NET Core Web API and RESTful design
- Experience with Entity Framework Core or MongoDB
- Understanding of database transactions and concurrent operations
- Excellent English communication (written + spoken)
- Demonstrated ability to work remotely and independently

Will be a plus
- Experience with SignalR for real-time communications
- Experience with RabbitMQ or Azure Service Bus
- Knowledge of 3D/CAD data or spatial databases
- Experience with Docker, GitHub Actions, Azure, or Terraform
- Construction or BIM industry familiarity
- Product or startup experience with tight feedback loops

Responsibilities
- Develop backend features using C#/.NET and ASP.NET Core Web API
- Build APIs that sync 3D BIM models with construction databases
- Implement real-time data synchronization for multi-user scenarios
- Handle data mapping between IFC elements and construction records
- Debug across the stack, solve problems end-to-end, and own features from design to deployment
- Work closely with a small team of passionate engineers and founders

We Offer
- A dynamic and responsible job in a stable and growing company
- Competitive salary and comfortable working conditions
- Opportunity for remote work
- Official employment (ФОП 3)

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