Full-Stack Java Developer (Spring Boot + React)

Náplň práce, právomoci a zodpovednosti:

At Citadelo, we’re dedicated to safeguarding the digital world through cutting-edge cybersecurity solutions. As we expand our team, we're seeking a skilled Full Stack Developer who is passionate about security and building resilient, scalable systems. Our offices are in Prague and Bratislava. 

About the Project

Modern SaaS platform built for penetration testing management and security reporting. It combines scalable backend architecture with a clean, modular React frontend. You’ll join a small, high-performing engineering team focused on quality, automation, and developer experience.

• Design and develop full-stack features (React + Spring Boot)

• Implement REST APIs, data models, and business logic

• Integrate frontend components with backend endpoints

• Write clean, maintainable, and well-tested code (JUnit 5)

• Participate in code reviews, architecture discussions, and CI/CD improvements

• Collaborate closely with product designers and security experts

Tech Stack

• Backend: Java (latest LTS or higher), Spring Boot / Spring Framework, Hibernate, Flyway, MapStruct

• Database: PostgreSQL, Redis (caching and session management)

• Frontend: TypeScript, React (latest), PrimeReact, TailwindCSS / PrimeFlex

• Testing: JUnit 5, Testcontainers, WireMock

• DevOps & Tooling: Gradle, Docker, Kubernetes (K8s), GitLab CI/CD

• Integrations: Google OAuth2 / Cloud Identity, Kong Gateway, Prometheus

• Reporting: Jasper Reports

Zamestnanecké výhody, benefity:

Sharing everything we know
Training and certifications
Flexible working hours
Wellbeing contribution
Teambuilding events
Hacker conferences
Flat hierarchy
Transparent communication
A modern & pet-friendly office in the center of Bratislava

Požiadavky na zamestnanca:

• Strong experience with Java and Spring Boot

• Hands-on experience with React and modern JavaScript/TypeScript

• Solid understanding of SQL and ORM frameworks (Hibernate/JPA)

• Familiarity with RESTful APIs and frontend–backend integration

• Experience writing unit/integration tests (JUnit 5)

• Basic understanding of containerization (Docker); Kubernetes is a plus

• Strong sense of code quality, clean architecture, and Git workflows

• Good communication skills and ability to work in an agile team

Nice to Have

• Experience with Redis, Flyway, or MapStruct

• Familiarity with Google Cloud Platform

• Understanding of security, authentication, or SSO

• Prior experience with SaaS or enterprise systems

Why Join?

• Work on a greenfield security product with a modern tech stack

• Small, skilled team — your ideas matter

• Emphasis on code quality, automation, and developer happiness

• Flexible work setup and opportunity to shape technical direction