Full Stack Engineer - C#.NET/REACT

Job Description

Location: Remote (Toronto preferred, Canada or UK-friendly time zones)

Type: Permanent Contract, full-time

Are you a seasoned Full Stack or Backend-leaning Developer who loves solving real, technical problems, not shipping "enterprise spaghetti code"? Want to help build next-gen cloud tools powered by AI, complex data modelling, and interactive 2D/3D visualisation?

An innovative technology company within the construction-tech and engineering-solutions space is growing its product team. They're building modern, cloud-based applications used globally, and you'll work closely with an exceptional Head of Product to shape two major new platforms currently in development.

About the company:

This is a small, senior, highly technical team that builds modern, cloud-native design and estimating software used in complex temporary works and engineering workflows. Their upcoming product suite includes:

• A new intelligent design engine with AI-assisted modelling and automated calculations
• A web-based estimating platform that uses 3D models to generate accurate metrics, plans, and costs

They value clean architecture, thoughtful engineering, and building things the right way, not rushing features at the cost of maintainability.

You'll take end-to-end ownership of features on two major new products, working across backend services, web clients, data modelling, and AI integrations. Expect a mix of architecture, hands-on building, problem-solving, and collaborating on product direction.

You will:

• Build and refine backend services using C# / ASP.NET Core
• Develop React + TypeScript front-end components for highly interactive UIs
• Work with PostgreSQL, including JSON-based modelling for complex nested structures
• Help shape clean, scalable APIs (REST + GraphQL)
• Integrate AI workflows (e.g., OpenAI/AWS) to transform natural-language instructions into design logic
• Contribute to lightweight 2D/3D viewer tools (Three.js, WebGL, GLB/gLTF handling) across both products
• Collaborate directly with the Head of Product on technical decision-making
• Deploy and support applications in AWS environments
• Participate in code reviews, architecture discussions, and roadmap planning

We are looking for:

Someone who is curious, hungry to learn, and excited by challenging technical problems, especially involving AI, 3D modelling, or data-heavy workflows.

Must-have skills:

• 5+ years in software engineering (Full Stack or Backend-majority)
• Strong backend capability with C#, ASP.NET Core (6+), ideally .NET 8
• Solid front-end experience with React + TypeScript
• Strong database background, ideally PostgreSQL with EF Core
• Experience building well-structured APIs (REST; GraphQL beneficial)
• Cloud deployment experience (AWS preferred)
• Strong problem-solving, communication, and ability to work in a remote, async-friendly team

Nice to have:

• Exposure to 3D/2D visualisation frameworks (Three.js, WebGL, canvas libraries)
• Experience working with GLB/gLTF models or CAD/BIM toolchains
• AI/ML integration experience (OpenAI, Bedrock, etc.)
• Background in engineering, construction tech, or modelling-heavy products
• Experience in early-stage product environments where requirements evolve quickly

Why join:

• Highly collaborative role working directly with senior product and engineering leaders
• Opportunity to solve genuinely complex, interesting technical challenges (3D graphics, AI design commands, intricate data modelling)
• High autonomy with a team that values craftsmanship and clean architecture
• Fully remote role with preference for EST-aligned hours

Apply now:

If you're excited by the idea of shaping AI-powered engineering tools, love backend C# development, and enjoy working across the stack on technically meaningful products, this is a role where you'll have real influence and long-term impact.

Apply directly with your resume or send me a DM if you would like more info.