Full Stack Developer .NET+ React

KCS iT; Porto; Hybrid; EUR 55,000 - 75,000; Full time

Job summary

KCS IT, based in Portugal, is looking for an Amazing Senior Full Stack Developer .NET+ React to join our hybrid Porto team. The role requires 5+ years of experience and strong backend (C#) and frontend (React) skills, with a focus on delivering robust REST APIs and scalable microservices.

The position is hybrid in Oporto, with candidates already living in Portugal. You will collaborate across cross-functional teams, work with modern tools (CI/CD, Docker, Kubernetes) and ensure code quality

Qualifications

• 4+ years as a Developer with at least 2 years in a Full Stack role.
• Strong experience with .NET / .NET Core / ASP.NET Core and C# for backend.
• Practical React.js experience with hooks, components, state management, routing.
• Solid knowledge of JavaScript/TypeScript, HTML and CSS.
• Experience with SQL Server or PostgreSQL and MongoDB/Redis.
• Built or consumed REST APIs and used Git for version control.
• Experience with CI/CD tools like Azure DevOps or GitHub Actions.
• Familiarity with Docker and Kubernetes and web security best practices.
• Experience with automated testing tools: Jest, React Testing Library, xUnit/NUnit.
• Experience with microservices architecture and distributed systems.
• Fluent English for technical communication.

Skills

Full Stack Development

.NET/.NET Core/C#

React.js

JavaScript/TypeScript

HTML/CSS

REST APIs

Git version control

CI/CD tools

Azure DevOps

GitHub Actions

Docker

Kubernetes

Security best practices

Microservices

English communication

Tools

Git

Azure DevOps

GitHub Actions

Docker

Kubernetes

SQL Server

PostgreSQL

MongoDB

Redis

xUnit/NUnit

Jest

React Testing Library

Job description

We’re looking for the special, unique and amazing YOU!

@ KCS IT, we look for the ones that stands out, for those that always wants to be better and fight for it, and for those who has the same values that we do: dedication, energy, integrity, transparency, flexibility, trust, honesty, hard work, proactivity, team work.

At KCS we stand for equality and value diversity. We create a safe, diverse environment where opportunities are equal for everyone! We do not discriminate based on age, ethnicity, sexual orientation, gender, disability or any factor other than merit. All applications with skills for the position are welcome!

We are looking for an Amazing: Full Stack Developer .NET+ React

Seniority: Senior (5+ years)

Type of position: Hybrid model in Oporto. Candidates need to be already living in Portugal!

The amazing you, will have:

• Minimum of 4 years of experience as a Developer, with at least 2 years in a Full Stack role.
• Solid hands-on experience with .NET / .NET Core / ASP.NET Core and C# for backend development.
• Practical experience with React.js, including hooks, components, state management, and routing.
• Good knowledge of JavaScript / TypeScript, HTML, and CSS.
• Experience with both relational (e.g., SQL Server, PostgreSQL) and non-relational (e.g., MongoDB, Redis) databases.
• Strong background in building and consuming REST APIs.
• Proficiency with Git version control.
• Experience performing manual testing and understanding of automated testing approaches.
• Fluent English (spoken and written) – essential for technical communication.
• Experience with CI/CD tools (e.g., Azure DevOps, GitHub Actions).
• Familiarity with Docker and/or Kubernetes.
• Awareness of web application security best practices.
• Experience with automated testing tools: Jest, React Testing Library (frontend), xUnit/NUnit (backend).
• Experience working with microservices architecture.

Why should you become part of our family?

• You can develop a career that fits you: your career development is personalized, taking in consideration your needs and goals from a short to long term
• Interesting Challenges Ahead: you can work for several clients from different sectors of activity
• Free training programs: Our training and certification programs in languages, tech, behavior and business will help you to reach your full potential faster
• International projects in Benelux: you can gain international experience in Benelux and balance a new way of living with work
• Type of projects (depending on the project you might find one of this types of projects):
• In hybrid Systems: Is important to balance work with socialization, that´s why a hybrid system works for us and for you
• Full Remote projects: If you want to work while you enjoy the comfort of your home
• Full Onsite projects: if you prefere the company of your colleagues!
• Take care of your well-being: Enjoy our free nutrition, psicologist, general medicine appointments and our yoga and personal training days… all remote

Who are we?

Founded in 2008 and based in Lisbon, KCS IT is a consulting company in the field of Information Technology and Services, focused on creating value for our clients through three main areas: Consulting, Outsourcing, Inovation and Training. Our commitment to talent development is unmistakable in the recent opening of the Porto, Leiria and Azores hubs, which aims to develop technology for the national and international market. Since 2018 we have been elected one of the 10 major companies in the “Index of Excellence”, an initiative that aims to reward organizations that invest most in the development and satisfaction of their employees.

At KCS IT we defend equality and value diversity. We create a safe, diverse environment where opportunities are equal for all employees!

We do not discriminate based on age, ethnicity, sexual orientation, gender, disability or any factor other than merit.

All applications with skills for the role are welcome!