Senior Full-Stack Engineer: Java, React, Kafka | Remote

Atos; Warszawa; Remote; PLN 240,000 - 360,000; Full time

Benefits offered by this job

6‑month B2B contract

Fully remote from Poland

Equipment provided

Skills development opportunities

Job summary

Atos is seeking a Senior Software Engineer (Full Stack) to join an international team on the SIMPL Programme, building a secure, modular data space platform. The role covers frontend and backend, API integration and cloud-to-edge solutions, with collaboration across Architects, Product Owners and DevOps.

You will work on backend services with Java 21, Spring Boot and REST, and frontend apps with React/TypeScript, while ensuring code quality, security and scalable architecture in a fully remote

Qualifications

• 5+ years of professional software development experience, including hands-on full-stack development.
• Strong practical experience with Java, ideally Java 21, Spring Framework and Spring Boot.
• Strong hands-on experience with React and TypeScript.
• Solid experience in REST API design and integration.
• Practical experience with Apache Kafka and event-driven integrations.
• Good knowledge of relational databases and database interactions.
• Experience with automated testing, JUnit, Git and code-review practices.
• Experience working within Agile/Scrum delivery teams.
• Understanding of secure coding and software quality practices.
• Ability to work independently and collaborate effectively within an international, cross-functional team.
• Very good command of English.

Responsibilities

• Design, develop, test and maintain backend services using Java 21, Spring Framework and Spring Boot.
• Develop modern frontend applications using React, TypeScript and JavaScript.
• Design, develop and maintain REST APIs and platform integrations.
• Build and support event-driven integrations using Apache Kafka.
• Develop and optimize application interactions with relational databases.
• Ensure high code quality through automated testing, peer reviews, JUnit, SonarQube and secure coding practices.
• Identify and address security findings and vulnerabilities, including Fortify and other security scans.
• Build and package applications using Maven and support deployment and operational activities in Tomcat-based environments, Argo and Rancher.
• Investigate and troubleshoot technical issues using logs, monitoring tools and Elasticsearch.
• Maintain code, configuration and technical documentation using Git, Jira and Confluence.
• Contribute to engineering best practices and continuous improvement across the programme.

Skills

Java

Spring Boot

React

TypeScript

REST APIs

Kafka

Databases

Testing

Git

Agile/Scrum

Security

Tools

Maven

Tomcat

Argo

Rancher

Elasticsearch

Jira

Confluence

Job description

Atos is seeking a Senior Software Engineer (Full Stack) to join an international team on the SIMPL Programme, building a secure, modular data space platform. The role covers frontend and backend, API integration and cloud-to-edge solutions, with collaboration across Architects, Product Owners and DevOps.

You will work on backend services with Java 21, Spring Boot and REST, and frontend apps with React/TypeScript, while ensuring code quality, security and scalable architecture in a fully remote