Java Full stack with React.js or Angular / Warsaw

Senior Software Engineer (Full-Stack, Agentic AI Focus)Warsaw, hybrid 1 day/weekB2B contractWe are looking for a talented Senior Software Engineer to join our dynamic development team. This role focuses on full-stack development, with a strong emphasis on leveraging Agentic AI tools and technologies to drive efficiency, innovation, and smarter development workflows.

The ideal candidate brings solid experience with Java-based enterprise applications, a strong engineering mindset, and a passion for using cutting-edge AI technologies to enhance productivity, code quality, and collaboration across the development lifecycle.

Key Responsibilities

1. Development & Engineering

• Design, develop, and maintain full-stack applications using Java and modern web technologies.

• Build robust backend services using the Spring Framework (Spring Boot, Spring Security).

• Develop and optimize database interactions using Hibernate ORM.

• Create responsive, intuitive, and user-friendly frontend interfaces.

• Integrate Agentic AI tools and technologies to improve development efficiency and code quality.

• Participate in the entire software development lifecycle, from requirements analysis to deployment.

• Implement cryptographic solutions and security protocols to ensure safe handling of sensitive data.

2. CI/CD & DevOps

• Design, build, and maintain Jenkins CI/CD pipelines for automated build, testing, and deployment.

• Configure and optimize continuous integration workflows to ensure high code quality and rapid delivery.

• Implement automated testing integration within CI/CD pipelines.

3. Agentic AI Tools & Technology Integration

• Leverage AI-powered development tools (GitHub Copilot, ChatGPT, Claude, Cline, etc.) to accelerate coding, troubleshooting, and problem-solving.

• Utilize AI tools for code review, automated testing, and documentation generation.

• Stay up to date with emerging Agentic AI technologies and assess their potential to enhance development workflows.

• Share knowledge and best practices for AI-assisted development across the team.

4. Testing & Quality Assurance

• Write comprehensive unit tests using JUnit, Mockito, and other testing frameworks.

• Develop and execute integration tests to ensure system reliability and stability.

• Implement automated testing strategies and maintain strong test coverage standards.

• Participate in code reviews and uphold high coding and quality standards.

• Debug and troubleshoot complex technical issues.

5. Collaboration & Process

• Work closely with cross-functional teams including product managers, designers, and QA engineers.

• Actively participate in Agile/Scrum development processes.

• Contribute to technical documentation and internal knowledge sharing.

• Continuously improve development processes, tools, and team efficiency.

Required Qualifications

Technical Skills

• Java Expertise: Minimum 5 years of hands-on experience in Java development.

• Spring Framework: Strong experience with Spring Boot and Spring Security.

• Hibernate / JPA: Solid knowledge of ORM concepts, entity mapping, and database optimization.

• Database Technologies: Experience with relational databases such as MySQL, PostgreSQL, or Oracle.

• Frontend Technologies: Proficiency in HTML5, CSS3, JavaScript, and modern frameworks (React, Angular, or Vue.js).

• Testing Frameworks: Hands-on experience with JUnit, Mockito, Cucumber, and integration testing tools.

• CI/CD Tools: Practical experience designing and maintaining Jenkins pipelines.

• Cryptography: Understanding of cryptographic principles including encryption/decryption, digital signatures, and secure key management.

• Containerization: Experience with Docker and Kubernetes.

• API Development: Experience designing and implementing RESTful APIs.

• Architecture Knowledge: Understanding of software architecture patterns and design principles.

• Agile Methodologies: Experience working within Agile/Scrum environments.

Preferred Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or a related field.

• Payment industry experience: 2+ years of experience working within payment systems or financial platforms.