Senior ReactJS Engineer | Frontend Lead & DevOps Mentor

Us3 Consulting; Kraków; On-site; PLN 180,000 - 270,000; Full time

Job summary

Us3 Consulting urgently seeks an experienced Senior ReactJS Developer for a long-term contract in Warsaw, Poland. The role requires deep React expertise, including components, hooks, and state management with Redux Toolkit, plus hands-on experience with Vite and modern DevOps practices.

You will lead and mentor a development team, drive CI/CD pipelines, and ensure code quality with SonarQube checks while collaborating with non-technical stakeholders across the project lifecycle.

Qualifications

• Expertise in React.js fundamentals, including components, hooks, and lifecycle methods.
• Experience with state management libraries such as Redux Toolkit.
• Familiarity with front-end build tools and pipelines (Vite).
• Strong analytical and problem-solving skills.
• Leadership: proven experience leading and mentoring a development team.
• Experience with containerized apps using Docker, Kubernetes and OpenShift ECS.
• Strong relational database design and optimization skills.
• Proficient with Git, Bitbucket, GitHub.
• Experience with Agile/Scrum processes and sprint planning.
• Experience with CI/CD pipelines and DevOps tools.
• Code quality: code coverage, reviews, and SonarQube usage.
• Excellent communication with technical and non-technical stakeholders.

Responsibilities

• Lead and mentor a development team on React.js projects.
• Develop and maintain React components, hooks, and Redux-based state management.
• Collaborate on front-end architecture and CI/CD pipelines.
• Ensure code quality with reviews, tests, and SonarQube checks.
• Coordinate with DevOps to manage Docker/Kubernetes/OpenShift deployments.
• Engage with stakeholders to translate requirements into technical tasks.

Skills

React.js fundamentals

Hooks

Redux Toolkit

Front-end build tools

Vite

Analytical problem solving

Leadership

Docker

Kubernetes

OpenShift ECS

Relational databases

Git

Bitbucket/GitHub

Agile/Scrum

CI/CD

SonarQube

Code reviews

Stakeholder communication

Tools

Docker

Kubernetes

OpenShift ECS

Git

Bitbucket

GitHub

Jenkins

TeamCity

LightSpeed

Harness

Job description

Us3 Consulting urgently seeks an experienced Senior ReactJS Developer for a long-term contract in Warsaw, Poland. The role requires deep React expertise, including components, hooks, and state management with Redux Toolkit, plus hands-on experience with Vite and modern DevOps practices.

You will lead and mentor a development team, drive CI/CD pipelines, and ensure code quality with SonarQube checks while collaborating with non-technical stakeholders across the project lifecycle.