Senior Full-Stack Java Developer – Cards Domain

B2B Network; Warszawa; On-site; PLN 170,000 - 240,000; Full time

Job summary

B2B Network in Warsaw is seeking a seasoned Full Stack Java Developer to shape, maintain, and secure internet-facing Commercial Cards applications. You will design, implement, and improve features using Java, Spring Boot, Angular, Kafka, Docker, and Kubernetes, while ensuring high availability and robust security.

Collaborating with cross-functional teams, you will drive secure coding, optimize performance, and participate in Agile ceremonies to deliver value and quality in a fast-paced

Qualifications

• 5+ years of Full Stack Java development experience and ability to test the changes developed.
• Java, Spring Boot, Microservices, REST APIs
• Angular and Angular Material
• Kafka and SQL databases
• Docker and Kubernetes, Git, Bitbucket, Jenkins, CI/CD
• Agile/Scrum way of working
• Experience resolving SAST, container scan, and security vulnerabilities
• Knowledge of secure coding and OWASP principles
• Strong troubleshooting and problem-solving skills
• English (B1+/B2 or higher)
• Must have some basic knowledge on using AI tools or willing to explore

Responsibilities

• Design, develop, test, and maintain applications using Java, Spring Boot, Angular, Kafka, SQL, Docker, and Kubernetes.
• Develop and enhance microservices-based solutions following clean code principles and best practices.
• Build and maintain REST APIs and integrations with internal and external systems.
• Participate actively in Agile/Scrum ceremonies, including planning, refinement, reviews, and retrospectives.
• Collaborate closely with Product Owners, Analysts, Architects, Security Specialists, and Operations teams to deliver business value.
• Analyze, troubleshoot, and resolve application defects, incidents, and production issues.
• Identify and remediate security vulnerabilities detected through SAST, container scanning, dependency scanning, penetration testing, and other security assessments.
• Drive secure coding practices and contribute to improving security posture of internet-facing applications.
• Support CI/CD processes using Git, Bitbucket, and Jenkins to enable efficient and reliable software delivery.
• Optimize application performance, scalability, resilience, and maintainability.
• Create and maintain technical documentation, including solution designs, operational documentation, and implementation guidelines.
• Contribute to continuous improvement initiatives related to development practices, automation, quality assurance, and security.
• Leverage AI-powered tools such as GitHub Copilot and Microsoft 365 Copilot to improve development efficiency and code quality.

Skills

Java

Spring Boot

Microservices

REST APIs

Angular

Kafka

SQL

Docker

Kubernetes

Git

Bitbucket

Jenkins

CI/CD

Agile/Scrum

OWASP

SAST security

Troubleshooting

English (B1+/B2)

Tools

Git

Bitbucket

Jenkins

Docker

Kubernetes

SQL

Job description

B2B Network in Warsaw is seeking a seasoned Full Stack Java Developer to shape, maintain, and secure internet-facing Commercial Cards applications. You will design, implement, and improve features using Java, Spring Boot, Angular, Kafka, Docker, and Kubernetes, while ensuring high availability and robust security.

Collaborating with cross-functional teams, you will drive secure coding, optimize performance, and participate in Agile ceremonies to deliver value and quality in a fast-paced