Backend Software Engineer

Costmine; Spokane (WA); Remote; USD 80,000 - 120,000; Full time

Job summary

An innovative software-first company is seeking a skilled Backend Software Developer to join their fully remote team. In this role, you will build scalable APIs and maintain backend services for a mining analytics platform, working closely with a talented team of developers and domain experts. Your expertise in .NET, SQL Server, and CI/CD practices will be crucial in delivering high-performance solutions that empower the mining industry. This is an exciting opportunity to contribute to a forward-thinking organization dedicated to transparency and collaboration, shaping the future of mining economics through data-driven insights.

Qualifications

• 5+ years of backend development experience, primarily with .NET.
• Strong skills in SQL Server, including complex queries and performance tuning.

Responsibilities

• Build and maintain scalable backend services using .NET 8 and Entity Framework Core.
• Design, optimize, and troubleshoot SQL Server queries and database structures.

Skills

.NET Development

SQL Server

API Development

CI/CD

Performance Tuning

React Collaboration

OpenTelemetry

Tools

Entity Framework Core

Azure DevOps

Git

Job description

Costmine Intelligence is a software-first company providing analytical tools and data-driven insights for the mining industry. As the global demand for critical minerals grows, we empower companies to assess and value mining opportunities that support the transition to net-zero. We’re a small but growing team of developers, analysts, and subject matter experts committed to transparency, innovation, and collaboration.

What You’ll Do

We’re looking for an experienced Backend Software Developer to join our fully remote team. You’ll work on the systems that power our mining analytics platform—building scalable APIs, managing databases, and evolving our backend services. You’ll collaborate closely with other developers and domain experts to deliver high-performance software solutions used by professionals across the mining sector.

Your Responsibilities

1. Build and maintain scalable backend services using .NET 8 and Entity Framework Core
2. Design, optimize, and troubleshoot SQL Server queries, stored procedures, and database structures
3. Develop and maintain minimal APIs that integrate with our frontend and third-party systems
4. Refactor and modernize legacy systems developed with .NET Framework
5. Participate in code reviews and architecture discussions to ensure code quality and long-term maintainability
6. Collaborate in a CI/CD environment using Git and Azure DevOps
7. Contribute to API security and backend performance improvements
8. Work closely with frontend developers (React) and data teams in a fully distributed environment

About You

1. 5+ years of backend development experience, primarily with .NET (preferably .NET 8)
2. Strong skills in SQL Server (2019 or later), including complex queries, performance tuning, and stored procedure development
3. Experience designing and building RESTful APIs
4. Familiarity with CI/CD pipelines, preferably using Azure DevOps
5. A solid understanding of software development best practices and design principles
6. Experience collaborating with React frontend developers
7. Experience with OpenTelemetry and observability tools
8. Self-motivated and comfortable working independently in a remote environment
9. Enthusiastic about building clean, maintainable, and well-tested code

Bonus Points For

1. Exposure to cloud infrastructure (e.g., AWS, Azure), especially with backend services like Lambda, S3, or RDS
2. Experience working in a data-intensive or analytics-focused environment

How to Apply

If you want to help us reshape one of the world’s most fundamental industries, we want to hear from you. Please submit your résumé, and a brief summary of your most challenging React or AWS project to [e-mail].

Join Costmine Intelligence and help define the future of mining economics—one real-time insight at a time.