Fullstack Developer (.NET + React)

SEARGIN IS HIRING!

As a dynamic multinational tech company operating in 50 countries, we drive innovation and create projects that shape the future and greatly enhance the quality of life. You will find our solutions in the space industry, supporting scientists in the development of cancer drugs, and implementing innovative technological solutions for industrial clients worldwide. These are just some of the areas in which we operate!

Currently, for the new Seargin project we are looking for Fullstack Developer (.NET + React).

Requirements (Must Have)

• Strong commercial experience as a Fullstack Developer
• Excellent knowledge of React (mandatory)
• Strong experience with .NET (ASP.NET Core, Web API)
• Hands-on experience with MS SQL Server
• Proven experience with Svelte or SvelteKit (production experience required)

Performance & Optimization

• Demonstrated experience in performance-critical projects
• Strong understanding of identifying and resolving database and application bottlenecks
• Ability to diagnose and improve systems with existing performance issues

AI & Development Approach

• Open and proactive approach to using AI in software development
• Applying AI for:
• code generation and refactoring
• debugging and problem analysis
• development automation and productivity improvements

Key Responsibilities

• Design, develop, and maintain fullstack applications using React on the frontend and .NET on the backend
• Build and maintain scalable REST APIs and backend services
• Work with MS SQL Server, including complex queries and data models
• Actively participate in performance troubleshooting and optimization of existing systems
• Analyze and resolve performance issues related to:
• slow SQL queries
• inefficient resource usage (CPU, memory, I/O)
• application and database bottlenecks
• Contribute to frontend applications built with Svelte / SvelteKit
• Collaborate with DevOps teams using Infrastructure as Code (IaC) practices
• Apply AI tools and LLMs to improve development efficiency, automation, and code quality

Project Details

We are looking for a self-reliant Senior .NET + React Developer to join our team working in an international, English-speaking environment. The role focuses primarily on backend development within the Azure and .NET ecosystem and React + Svelte on the frontend activities.

Your responsibilities will include both new feature development (around 40%) and ongoing maintenance (around 60%) of existing solutions.

You will work in a standard Agile setup with 2-week sprints and short daily stand-ups (15–20 minutes). The position is full-time, following typical business hours. Cooperation can start as early as May.

We will consider both a hybrid model for people based in the 3City area and fully remote developers.

Discover the Power of IT Excellence. Apply!

To learn more about Seargin, please visit our web page: www.seargin.com