Mid-Level Full-Stack Developer (.NET / React)

Salt Square is a growing outsourcing company providing high-quality software development services to clients across a wide range of industries. Our team is composed of skilled and dedicated professionals delivering innovative solutions that meet and exceed client expectations.

Our mission is to build reliable, scalable, and future-ready digital solutions tailored to each client’s unique business needs. We foster a team-first culture where collaboration, continuous learning, and technical excellence are core values. From supporting startups in launching their first products to helping global enterprises scale their operations, we strive to deliver outstanding value on every project.

We are looking for a strong Mid-Level .NET/React Developer to join our engineering team. The primary focus is backend development in .NET Core/C#, with regular frontend contributions in React/TypeScript. You will be expected to deliver features independently within established architecture and take real ownership of your work, with senior developers available for guidance on larger design decisions.

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  Build and maintain backend features in .NET Core and contribute to the React frontend as needed

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  Implement API endpoints and integrate with existing services

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  Write clean, testable code and participate actively in code reviews

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  Participate in Agile sprint ceremonies, deliver against sprint commitments, and communicate blockers

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  Use AI-augmented development practices as a standard part of daily work

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  Take increasing ownership over time, growing from feature delivery toward broader technical contribution

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  Solid proficiency in .NET Core, C#, and ASP.NET Core Web API, able to build features end-to-end and not just follow tickets

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  Working knowledge of React.js and TypeScript, able to build UI components, manage state, and connect them to backend APIs

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  Experience with SQL databases, comfortable writing performant queries, understanding indexing, and working with Entity Framework Core or equivalent ORM

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  Understanding of RESTful API design and consumption, able to implement endpoints and reason about API contracts

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  Familiarity with software design patterns and clean code principles

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  Comfortable with Git, pull requests, branching, and resolving merge conflicts

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  Agile/Scrum experience, can take on sprint tasks, communicate progress, and escalate when stuck

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  Active use of AI tools in their development workflow (Copilot, Claude, Cursor, or similar), we are looking for developers who treat AI as a core part of how they work, not an optional add-on

• Experience with EF Core migrations, relationships, and more complex query patterns beyond basic CRUD

• Basic understanding of Docker and how to run or debug services locally in containers

• Any hands-on exposure to Azure services or equivalent cloud platforms

• Experience with TailwindCSS, ShadCN, or utility-first CSS frameworks

• Experience with unit testing in .NET or React and familiarity with test-driven development