.NET FullStack Engineer

Itexus LLC; Poland; On-site; PLN 50,000 - 80,000; Full time

Job summary

Itexus LLC in Poland is hiring a .NET FullStack Engineer to develop modern full-stack applications with a focus on backend (C#, ASP.NET Core) and frontend (React/Angular). The role involves building RESTful APIs, collaborating with engineers, and contributing to high-quality solutions for international clients. Candidates should have over 3 years of experience in C# and ASP.NET Core, strong SQL skills, and familiarity with Agile methodologies. Additional skills in modern frontend frameworks like React or Angular are preferred.

Qualifications

• 3+ years of commercial experience with C# and ASP.NET Core.
• Experience designing and building RESTful APIs, microservices, and distributed systems.
• Upper-Intermediate English (B2+) or higher.

Responsibilities

• Develop and maintain full-stack features with a focus on high-quality production code.
• Design and implement backend services using C# and ASP.NET Core.
• Build and integrate RESTful APIs and frontend applications.

Skills

C#

ASP.NET Core

RESTful APIs

OOP

SQL

Entity Framework Core

CI/CD pipelines

Docker

Agile / Scrum

Git

React

Angular

Job description

We’re looking for a .NET FullStack Engineer to join our team.

In this role, you will work on building modern full-stack applications with a strong backend focus (C#, ASP.NET Core), while also contributing to frontend development using React or Angular. You will participate in launching new projects, support pre-sale activities, and take part in architecture discussions, client communication, and delivery of high-quality solutions for international projects.

You will collaborate with experienced engineers, influence technical decisions, and continuously improve your expertise while working on scalable and production-grade systems.

Location: Poland

About us

Itexus is a team of talented professionals in software development, testing, and product support. Since 2013, we’ve successfully delivered more than 300 projects for clients across the US, Western Europe, and the CIS. Our portfolio includes startups and large international companies in finance, insurance, healthcare, tourism, retail, and education.

Responsibilities:

• Develop and maintain full-stack features with a focus on high-quality production code;
• Design and implement backend services using C# and ASP.NET Core;
• Build and integrate RESTful APIs and frontend applications;
• Participate in architecture design and technical decision-making;
• Contribute to pre-sale activities and new project launches;
• Communicate with clients and participate in demos and discussions;
• Diagnose and resolve bugs and performance issues (backend and frontend);
• Participate in code reviews, mentoring, and knowledge sharing;
• Take part in technical interviews and internal/external tech events (meetups, dev2dev).

Requirements:

• 3+ years of commercial experience with C# and ASP.NET Core;
• Experience designing and building RESTful APIs, microservices, and distributed systems;
• Strong understanding of OOP, SOLID, design patterns, Clean Architecture, DDD, CQRS;
• Strong SQL skills (MS SQL Server and/or PostgreSQL), query optimization;
• Hands‑on experience with Entity Framework Core and/or Dapper;
• Experience with CI/CD pipelines (Azure DevOps, GitLab CI);
• Solid experience with Git;
• Experience deploying and managing applications in Azure (AKS, App Services, Functions, Storage) or AWS;
• Experience with Docker (build and orchestration);
• Experience writing unit and integration tests;
• Experience working with authentication/authorization (JWT, OAuth2, IdentityServer, Keycloak, Azure Entra ID);
• Experience as a Senior Developer or Tech Lead (mentoring, architecture decisions);
• Experience working in Agile / Scrum environments;
• Proactive mindset, problem‑solving attitude, and ownership;
• Upper-Intermediate English (B2+) or higher.

Frontend (React / Angular):

• 2+ years of commercial experience with React (preferred) or Angular;
• Experience with React / Next.js ecosystem;
• Experience with state management (Redux and/or MobX);
• Experience with UI libraries (Material UI, Ant Design, or similar);
• Understanding of modern frontend architecture (hooks, context, state management);
• Experience integrating REST APIs on the frontend;

For Angular:

• Experience with Angular 2+ (RxJS, NgRx);
• Experience with component libraries (Angular Material, PrimeNG).

Would be a plus:

• Experience with Event-Driven or Serverless architectures;
• Experience with message brokers (RabbitMQ, Kafka, Azure Service Bus), Redis;
• Experience with Kubernetes (k8s), Helm, Infrastructure as Code (Terraform);
• Cloud certifications (Azure, AWS);
• Experience with Next.js (SSR, SSG, API routes);
• Experience configuring build tools (Webpack, Vite).

We’ll be happy to tell you more about the company when you meet with us!