Senior Full Stack or Backend Developer (.NET & React)

Luxoft; Polska; On-site; PLN 180,000 - 320,000; Full time

Job summary

Luxoft Poland is seeking a Senior Full Stack Developer to build and evolve a large scale platform used in open pit mining operations. You will work on a distributed system deployed to live mine sites.

You will design backend services with C#/.NET in microservices, build React frontends, own features end-to-end, and collaborate with domain experts to translate complex operations into reliable software. Experience with SQL Server and ORMs is required.

Qualifications

• Strong backend experience with C#/.NET and microservices
• Experience with SQL Server and ORM frameworks
• Proven ability to own features end-to-end from design to production

Responsibilities

• Design and build backend services in C#/.NET within microservices and event-driven architecture
• Develop React frontend focused on clarity and performance
• Own features end-to-end from design to production deployment
• Collaborate with domain experts to translate complex problems into software
• Contribute to architecture, standards, and engineering best practices
• Improve reliability, observability, and performance of a mission-critical system

Skills

C# and .NET

Microservices

SQL Server

Entity Framework

API design

React

MUI

Mantine

Redux

UI/UX focus

Docker

Kubernetes

C++ integration

Mining software

Open pit mining

Tools

MUI

Mantine

Redux

Job description

Private Medical & Dental care & Life Insurance

Internal Mobility program - possibility of rotation between projects, locations, accounts

Project Description

Build software that runs real mining operations. See your work live on an open pit mine site.

We are looking for a Senior Full Stack Developer or strong Backend Developer to help build and evolve a large scale software platform used in open pit mining operations.

This is not internal tooling or maintenance work. You will be building new features in a modern, distributed system where the changes you make are deployed into live mine sites and used every day by operational teams.

If you care about ownership, clean architecture, and seeing your work have real world impact, this role is worth a look.

Responsibilities

You will join a cross functional product squad responsible for delivering new capabilities across a complex operational platform that supports fleet and equipment workflows in open pit mining.

Your work will include:

• Designing and building backend services using C# and .NET in a microservices and event driven architecture
• Building modern React applications focused on clarity, performance, and usability
• Owning features end to end from design through to production deployment
• Working closely with domain experts to turn complex operational problems into reliable software
• Contributing to architectural decisions, technical standards, and engineering best practice
• Improving reliability, observability, and performance in a mission critical system

Skills required

• Strong experience with C# and .NET
• Experience designing and building microservices and event driven systems
• Solid SQL skills and experience with SQL Server
• Experience with Entity Framework or similar ORMs
• Comfortable owning APIs, service design, and data models

Frontend

• Strong experience with React
• Experience using modern component libraries such as MUI, Mantine, or shadcn
• Experience with state management libraries such as Redux, Zustand, or MobX
• A focus on building maintainable and user friendly interfaces

What is nice to have

• Docker and Kubernetes exposure
• Experience integrating with native or performance critical systems such as C++
• Previous experience in mining or industrial software
• Experience working with open pit mining systems