Backend Developer

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) 2000-2500 euro