Java Developer

🏢 Summary: Mid-level Java Backend Developer role focused on building and contributing to a microservices-based architecture within a fintech center of excellence. The position involves developing and maintaining backend services using Java and Spring technologies in a hybrid work model. 🗂️ Requirements: Higher education degree, 3+ years of Java backend development experience (Java 8 or higher), Experience with Spring and Spring Boot, Experience with RDBMS (Oracle, PostgreSQL, SQL), Experience with JPA and Hibernate, Knowledge of microservices-based and hexagonal architecture, Experience with CI/CD pipelines, English proficiency B2+ or higher 📃 Skills: Java, Spring, SpringBoot, Oracle, PostgreSQL, SQL, JPA, Hibernate, Microservices, Hexagonal, CICD, Angular, AWS, Scrum 🏢 Description: We are looking for a Java Developer Mid for an opportunity to join and be part of the creation of a center of excellence for a leading multinational fintech company . The project’s work model has been updated to 2 days per week in the office in Lisbon and 3 days working from home . Required qualifications: The candidate must have at least one higher education degree. Experience with Java Backend development with strong theoretical knowledge ( Java >= 8 ) ( 3+ years for Mid profiles ). Experience with Spring/Spring Boot. Experience in RDBMS (Oracle, PostgreSQL, SQL). Experience in JPA and Hibernate. Knowledge in Application architecture (MicroServices based architecture, hexagonal…). Experience with CI/CD. English proficiency should be at least B2+ level. Ideally, the candidate should also have: Experience with Java Frontend (Angular or any other UI framework). Experience with AWS or other cloud platform. Problem-solving skills and logical reasoning. Passion for learning and growing as a developer. Experience working in an Agile environment and Scrum methodologies. Other details: The position is hybrid, requiring 2 days per week in the office in Lisbon and 3 days working from home , facilitating a balanced workflow.

🏢 Summary: Hybrid Mid-Level Java Fullstack Developer role focused on building and enhancing a modern Settlement Instructions management application within the financial sector. The position involves developing scalable backend services and dynamic frontend components while supporting DevOps and cloud-based deployments. You will contribute to streamlining global payment processes through robust, compliant, and high-quality software solutions. 🗂️ Requirements: 3+ years of professional experience in fullstack development, Strong proficiency in Java 8/17, Strong proficiency in Spring Boot, Strong proficiency in Angular 15, Experience with micro-frontend architecture, Experience with Nx workspace, Knowledge of CI/CD pipelines, Experience with Kubernetes, Familiarity with ELK stack, Fluency in Polish and English, Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Angular, Nx, Microfrontend, CI/CD, Bitbucket, Jenkins, SonarQube, Kubernetes, ELK, Liquibase, Hibernate, IBMMQ, vavr, Oracle, PLSQL 🏢 Description: Unleash the power of innovative software development — shape the future with bold, scalable solutions! Warszawa-based opportunity with hybrid work model. As a Mid-Level Java Fullstack Developer , you will be working for our client, a leader in financial technology, focused on building and deploying a cutting-edge application for managing Settlement Instructions. You will contribute to a pivotal project that streamlines back-office payment processes, enabling seamless and compliant financial operations across the globe. Join us in driving digital transformation and shaping smarter, more efficient financial systems! Your main responsibilities: Develop and enhance robust backend solutions using Java 8/17, Spring Boot, and related frameworks. Build dynamic and responsive front-end components with Angular 15, Nx workspace, and micro-frontend architecture. Collaborate across teams to integrate backend services with intuitive UI features, ensuring an optimal user experience. Implement and manage DevOps practices, including CI/CD pipelines with Bitbucket, Jenkins, and SonarQube. Leverage container orchestration and monitoring tools like Kubernetes and ELK stack for scalable and reliable deployment. Maintain high code quality through comprehensive testing, code reviews, and adherence to best practices. Engage in continuous learning and contribute to team knowledge sharing with a collaborative, proactive attitude. You're ideal for this role if you have: 3+ years of professional experience in fullstack development, with a solid understanding of both backend and frontend technologies. Strong proficiency in Java (8/17), Spring Boot, and Angular 15. Experience with micro-frontend architectures, Nx workspace, and related tools. Knowledge of DevOps principles, CI/CD pipelines, and container orchestration (Kubernetes). Familiarity with monitoring tools such as ELK stack. A team-oriented mindset with excellent problem-solving skills and adaptability. Fluency in Polish and English (written and spoken). It is a strong plus if you have: Certifications in Java, Angular, or DevOps tools. Experience with Liquibase, Hibernate, IBM MQ, or vavr. Knowledge of Oracle PL/SQL. Language Required for the role: Fluent in Polish and English (written and spoken). Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Mid-Level Java Fullstack Developer role focused on building and enhancing a cutting-edge Settlement Instructions management application in the financial sector. The position combines backend and frontend development with DevOps practices to deliver scalable, compliant, and high-quality solutions. Work in a hybrid model contributing to digital transformation of global payment processes. 🗂️ Requirements: 3+ years of fullstack development experience, Proficiency in Java 8/17, Strong knowledge of Spring Boot, Experience with Angular 15, Experience with micro-frontend architecture, Experience with Nx workspace, Knowledge of CI/CD pipelines, Experience with Kubernetes, Familiarity with ELK stack, Understanding of DevOps principles, Fluency in Polish and English, Legal right to work in the European Union 📃 Skills: Java, SpringBoot, Angular15, Nx, Microfrontends, DevOps, CICD, Bitbucket, Jenkins, SonarQube, Kubernetes, ELK, Liquibase, Hibernate, IBMMQ, Vavr, Oracle, PLSQL 🏢 Description: Unleash the power of innovative software development — shape the future with bold, scalable solutions! Warszawa-based opportunity with hybrid work model. As a Mid-Level Java Fullstack Developer , you will be working for our client, a leader in financial technology, focused on building and deploying a cutting-edge application for managing Settlement Instructions. You will contribute to a pivotal project that streamlines back-office payment processes, enabling seamless and compliant financial operations across the globe. Join us in driving digital transformation and shaping smarter, more efficient financial systems! Your main responsibilities: Develop and enhance robust backend solutions using Java 8/17, Spring Boot, and related frameworks. Build dynamic and responsive front-end components with Angular 15, Nx workspace, and micro-frontend architecture. Collaborate across teams to integrate backend services with intuitive UI features, ensuring an optimal user experience. Implement and manage DevOps practices, including CI/CD pipelines with Bitbucket, Jenkins, and SonarQube. Leverage container orchestration and monitoring tools like Kubernetes and ELK stack for scalable and reliable deployment. Maintain high code quality through comprehensive testing, code reviews, and adherence to best practices. Engage in continuous learning and contribute to team knowledge sharing with a collaborative, proactive attitude. You're ideal for this role if you have: 3+ years of professional experience in fullstack development, with a solid understanding of both backend and frontend technologies. Strong proficiency in Java (8/17), Spring Boot, and Angular 15. Experience with micro-frontend architectures, Nx workspace, and related tools. Knowledge of DevOps principles, CI/CD pipelines, and container orchestration (Kubernetes). Familiarity with monitoring tools such as ELK stack. A team-oriented mindset with excellent problem-solving skills and adaptability. Fluency in Polish and English (written and spoken). It is a strong plus if you have: Certifications in Java, Angular, or DevOps tools. Experience with Liquibase, Hibernate, IBM MQ, or vavr. Knowledge of Oracle PL/SQL. Language Required for the role: Fluent in Polish and English (written and spoken). Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Mid-Level Java Fullstack Developer role focused on building and enhancing a cutting-edge Settlement Instructions management application in the fintech domain. The position involves developing scalable backend services and dynamic frontend components while supporting DevOps and cloud-native deployment practices. The role contributes to streamlining global back-office payment processes through robust, compliant digital solutions. 🗂️ Requirements: 3+ years fullstack development experience, Proficiency in Java 8/17, Experience with Spring Boot, Proficiency in Angular 15, Experience with micro-frontend architecture, Experience with Nx workspace, Knowledge of CI/CD pipelines, Experience with Kubernetes, Familiarity with ELK stack, Fluent Polish and English, Legal right to work in the EU 📃 Skills: Java, Spring, SpringBoot, Angular, Nx, Microfrontend, CI/CD, Bitbucket, Jenkins, SonarQube, Kubernetes, ELK, Liquibase, Hibernate, IBMMQ, vavr, Oracle, PLSQL 🏢 Description: Unleash the power of innovative software development — shape the future with bold, scalable solutions! Warszawa-based opportunity with hybrid work model. As a Mid-Level Java Fullstack Developer , you will be working for our client, a leader in financial technology, focused on building and deploying a cutting-edge application for managing Settlement Instructions. You will contribute to a pivotal project that streamlines back-office payment processes, enabling seamless and compliant financial operations across the globe. Join us in driving digital transformation and shaping smarter, more efficient financial systems! Your main responsibilities: Develop and enhance robust backend solutions using Java 8/17, Spring Boot, and related frameworks. Build dynamic and responsive front-end components with Angular 15, Nx workspace, and micro-frontend architecture. Collaborate across teams to integrate backend services with intuitive UI features, ensuring an optimal user experience. Implement and manage DevOps practices, including CI/CD pipelines with Bitbucket, Jenkins, and SonarQube. Leverage container orchestration and monitoring tools like Kubernetes and ELK stack for scalable and reliable deployment. Maintain high code quality through comprehensive testing, code reviews, and adherence to best practices. Engage in continuous learning and contribute to team knowledge sharing with a collaborative, proactive attitude. You're ideal for this role if you have: 3+ years of professional experience in fullstack development, with a solid understanding of both backend and frontend technologies. Strong proficiency in Java (8/17), Spring Boot, and Angular 15. Experience with micro-frontend architectures, Nx workspace, and related tools. Knowledge of DevOps principles, CI/CD pipelines, and container orchestration (Kubernetes). Familiarity with monitoring tools such as ELK stack. A team-oriented mindset with excellent problem-solving skills and adaptability. Fluency in Polish and English (written and spoken). It is a strong plus if you have: Certifications in Java, Angular, or DevOps tools. Experience with Liquibase, Hibernate, IBM MQ, or vavr. Knowledge of Oracle PL/SQL. Language Required for the role: Fluent in Polish and English (written and spoken). Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Mid-Level Java Developer role focused on building and maintaining scalable financial software solutions in a digital banking environment. The position involves developing, testing, and optimizing applications using modern Java and related technologies within an Agile team. The role offers a flexible remote work model while contributing to high-impact financial systems. 🗂️ Requirements: Minimum 4 years of professional experience in software development, Strong knowledge of Java 8 or higher, Strong knowledge of Spring Boot, English language proficiency at minimum B1 level, Fluent communication in Polish, Legal right to work in the European Union 📃 Skills: Java, SpringBoot, Angular, MSSQL, PostgreSQL, Kubernetes, GitLabCI, Jenkins, JIRA 🏢 Description: Unleash innovative financial software — shape the future of digital banking! Wroclaw-based opportunity with a flexible remote work model (up to 5 days per week). As a Mid-Level Java Developer , you will be working for our client, a leader in the national financial market. You will contribute to developing robust and scalable software solutions that drive the future of financial services. Join us in building impactful technology that empowers millions of users and accelerates the digital transformation of finance. Your main responsibilities: Develop, test, and deploy financial software applications following industry best practices. Collaborate with business teams to design innovative, efficient solutions. Maintain and review high-quality code to ensure top standards. Participate actively in Agile team activities, including code reviews and sprint planning. Contribute to system optimization and troubleshoot issues promptly. Work with modern technologies such as Angular, Java 8+, Spring Boot, MS SQL, and PostgreSQL. Support continuous integration and deployment processes, possibly using Kubernetes, GitLab CI, Jenkins, and JIRA. You're ideal for this role if you have: Minimum 4 years of professional experience as a software developer. Strong knowledge of Java 8+ and Spring Boot. Experience with Angular or similar modern frameworks - nice to have Good communication skills in English (minimum B1 level). Openness to collaborate with business teams, testers, and analysts. Desire to influence technology choices and project methodologies. It is a strong plus if you have: (optional) Experience with Kubernetes, GitLab CI, Jenkins, or JIRA. Language Required for the role: Fluent communication in Polish. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java backend applications within a newly established center of excellence in a multinational environment. The position combines hands-on backend development with mentoring responsibilities, active participation in architecture discussions, and CI/CD practices. It offers a collaborative, non-hierarchical setup with a hybrid work model. 🗂️ Requirements: Higher education degree, 5+ years of experience in Java Backend development, Strong proficiency in Spring and Spring Boot, Experience with relational databases (Oracle, PostgreSQL, SQL), Experience with JPA and Hibernate, Knowledge of microservices-based and hexagonal architecture, Experience with CI/CD tools and practices, English proficiency at B2 level 📃 Skills: Java, Spring, SpringBoot, Oracle, PostgreSQL, SQL, JPA, Hibernate, Microservices, HexagonalArchitecture, CICD, Angular, AWS, Scrum, Agile 🏢 Description: Summary: The role of a Senior Java Developer involves contributing to the establishment of a center of excellence within a leading multinational company. The primary goal is to leverage strong Java development skills in a collaborative, innovative environment while mentoring junior developers. Responsibilities: * Join the establishment of a center of excellence. * Develop and maintain Java backend applications. * Mentor and coach junior team members (Senior role). * Facilitate onboarding and serve as a role model (Lead role). * Collaborate in a horizontal organization with no management hierarchy. * Engage in CI/CD practices and application architecture discussions. Must Haves: * Higher education degree. * Strong experience with Java Backend development (5+ years). * Proficiency in Spring/Spring Boot framework. * Experience with Relational Database Management Systems (Oracle, PostgreSQL, SQL). * Familiarity with JPA and Hibernate. * Knowledge of Application architecture (Microservices based, hexagonal…). * Proficiency in CI/CD tools. * English proficiency at B2 level. Nice to Haves: * Experience with Java Frontend frameworks (Angular or similar). * Familiarity with AWS or other cloud platforms. * Problem-solving skills and logical reasoning. * Passion for continuous learning and growth. * Experience in Agile environments and Scrum methodologies. Other Details: * Work Model: 4 days in-office initially, transitioning to 3 days in-office and 2 days remote. * Work Schedule: 43 hours/week in winter and 39 hours/week in summer with additional compensation days.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java backend applications within a center of excellence, contributing to architecture decisions and CI/CD processes. The position involves working in a collaborative, non-hierarchical environment and mentoring junior developers. It requires strong backend expertise and active participation in modern microservices-based architectures. 🗂️ Requirements: Higher education degree, 5+ years of Java backend development experience, Strong knowledge of Spring and Spring Boot, Experience with relational databases (Oracle, PostgreSQL), Proficiency in SQL, Experience with JPA and Hibernate, Knowledge of microservices-based architecture, Experience with CI/CD tools and processes, English proficiency at B2 level 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, PostgreSQL, JPA, Hibernate, Microservices, CI/CD, Angular, AWS 🏢 Description: Summary: The role of a Senior Java Developer involves contributing to the establishment of a center of excellence within a leading multinational company. The primary goal is to leverage strong Java development skills in a collaborative, innovative environment while mentoring junior developers. Responsibilities: * Join the establishment of a center of excellence. * Develop and maintain Java backend applications. * Mentor and coach junior team members (Senior role). * Facilitate onboarding and serve as a role model (Lead role). * Collaborate in a horizontal organization with no management hierarchy. * Engage in CI/CD practices and application architecture discussions. Must Haves: * Higher education degree. * Strong experience with Java Backend development (5+ years). * Proficiency in Spring/Spring Boot framework. * Experience with Relational Database Management Systems (Oracle, PostgreSQL, SQL). * Familiarity with JPA and Hibernate. * Knowledge of Application architecture (Microservices based, hexagonal…). * Proficiency in CI/CD tools. * English proficiency at B2 level. Nice to Haves: * Experience with Java Frontend frameworks (Angular or similar). * Familiarity with AWS or other cloud platforms. * Problem-solving skills and logical reasoning. * Passion for continuous learning and growth. * Experience in Agile environments and Scrum methodologies. Other Details: * Work Model: 4 days in-office initially, transitioning to 3 days in-office and 2 days remote. * Work Schedule: 43 hours/week in winter and 39 hours/week in summer with additional compensation days.

🏢 Summary: Senior Java Developer role focused on building scalable REST APIs and advanced backend systems using modern Java and Spring technologies. The position involves designing, developing, and testing secure enterprise solutions in a hybrid work model. It offers the opportunity to contribute to large-scale digital transformation initiatives. 🗂️ Requirements: 5+ years of professional experience in Java development, Strong expertise in Java 17+, Strong expertise in Spring Boot 3/4+, Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL, Experience in building and securing REST APIs, Ability to perform unit and integration testing, Ability to analyze requirements and translate them into technical solutions, Fluent English (written and spoken), Legal right to work in the European Union, Availability to work in a hybrid model (up to 2 remote days per week) 📃 Skills: Java, Spring, SpringBoot, Git, Kubernetes, Jenkins, Flyway, RabbitMQ, PostgreSQL, REST, UnitTesting, IntegrationTesting, Architecture, Security, English 🏢 Description: Unleash innovation with scalable enterprise solutions — shape the future of digital transformation! Warsaw-based opportunity with hybrid work model (up to 2 remote days per week). As a Senior Java Developer , you will be working for our client, a leading player in the technology industry committed to delivering cutting-edge software solutions. You will contribute to building robust, scalable REST APIs and advanced backend systems, empowering organizations to transform their digital landscapes and drive business success. This is your chance to grow your career at the forefront of technological innovation. Your main responsibilities: Analyze requirements and convert them into comprehensive technical tasks, supporting the development process. Propose and challenge technical solutions to ensure optimal implementation. Develop functionalities in Java 17+ using Spring Boot 3/4+ in line with architectural and security standards. Conduct thorough unit and integration testing to ensure code quality. Create and update technical and architectural documentation for ongoing project clarity. Share knowledge with team members to foster continuous learning and improvement. Stay updated on technological advancements and suggest innovative enhancements. You're ideal for this role if you have: 5+ years of professional experience in Java development or relevant fields. Strong expertise in Java 17+ and Spring Boot (version 3 or 4+). Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL. Proven ability to analyze complex requirements and translate them into technical solutions. Solid understanding of REST API development, architecture, security, and best practices. Excellent communication skills in fluent English. Ability to work in a hybrid model, with up to 2 remote days per week. It is a strong plus if you have: Knowledge of containerization and orchestration tools or certifications. Experience working within Agile teams or with CI/CD pipelines. Language Required for the role: Fluent English, written and spoken. Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: B2B contract opportunity for a Java Fullstack Developer with a strong backend focus (60–70%) to build and maintain applications within a Digital Platform using a modern tech stack. The role involves developing backend and frontend components, participating in code reviews and technical discussions, and contributing to architectural decisions in a distributed team environment. 🗂️ Requirements: Core Java 11, Advanced Java (JDBC, Collections, Serialization, Memory management), Spring framework, JPA (Hibernate), RDBMS knowledge, Strong SQL skills, RESTful web services, XML and JSON, OpenAPI (Swagger), JavaScript, Typescript, HTML, CSS, Angular 14+, RxJS, Git, Maven, npm, Frontend security (OWASP), Backend security knowledge 📃 Skills: Java, JDBC, Collections, Serialization, Spring, JPA, Hibernate, SQL, RDBMS, REST, XML, JSON, OpenAPI, Swagger, JavaScript, Typescript, HTML, CSS, Angular, RxJS, Git, Maven, npm, OWASP 🏢 Description: For one of our clients, we are looking for a Java Fullstack Developer (m/f/n). As part of the Digital Platform team, you will work on several applications utilizing a modern technology stack. You will get the opportunity to not only learn and grow but also to contribute and be involved in technical discussions and decision making. You will be working in a very nice, dynamic, multi-cultural and geographically distributed team and will receive a lot of support during your onboarding phase. The skill split is 60/40 or 70/30, with a stronger focus on backend. Responsibilities Development (Backend and Frontend) on several applications within the Digital Platform scope, both on new and existing applications Perform code reviews Participate in SCRUM events Participate in technical analysis and discussions Be proactive and take initiative Work closely with your colleagues and communicate Requirements Core Java V11, Advanced Java (JDBC, Collections, Serialization, Memory management) Web communication: XML, JSON, REST Spring framework JPA (Hibernate) Knowledge of RDBMS, specifically SQL skills Web communication: experience with OpenAPI specifications (Swagger) Proficiency in Web languages (JavaScript, Typescript, HTML, CSS) Proficiency in Angular 14+ framework (SPA) Knowledge of reactive programming (RxJS) Good understanding of GIT, Maven, and npm Understanding of Agile Workflow Understanding of Frontend Security topics (owasp) Understanding of Backend Security topics Fluency in English (B2 level) Nice to have: Experience with the Redux pattern (NgRX) & store management Experience with the Nx build system library Build and Deployment automation (Jenkins, Sonar) Microservice architecture and development (Spring Boot) Experience in leading a (geographically distributed) technical team Experience being involved in technical design Our offer: Rate: 130 - 140 PLN/h net + VAT B2B contract via SHIMI Hybrid – 2 days per week from the Warsaw or Kraków office Start: ASAP – notice period up to 2 weeks

🏢 Summary: Mid/Senior Java Developer role focused on building and maintaining scalable backend systems using Java 17/21 and Spring Boot 3. The position involves developing REST APIs, working with relational and NoSQL databases, and contributing to CI/CD pipelines and code quality improvements. The role also includes refactoring, code reviews, and collaboration on modern architecture patterns. 🗂️ Requirements: Minimum 5 years of commercial experience in Java, Very good knowledge of Spring, Spring Boot, Spring Data, Spring Security, Spring Cloud, Strong experience with Hibernate and JPA, Solid SQL knowledge and hands-on experience with PostgreSQL, Understanding of REST, HTTP, JWT, OAuth2, Practical experience with at least one NoSQL database, Basic knowledge of Git and CI/CD pipelines, Strong knowledge of OOP principles and clean code practices 📃 Skills: Java, Spring, SpringBoot, SpringData, SpringSecurity, SpringCloud, Hibernate, JPA, SQL, PostgreSQL, REST, HTTP, JWT, OAuth2, MongoDB, Redis, Cassandra, DynamoDB, Git, CI/CD, JUnit, Mockito, Testcontainers, Pact, Docker, Kubernetes, OpenShift, Kafka, RabbitMQ, Prometheus, Grafana, ELK 🏢 Description: We are a software house delivering projects for international clients, and we are looking for Mid / Senior Java Developers to join our team. Responsibilities: Designing and writing clean, scalable code (primarily Java 17/21 + Spring Boot 3) Creating and maintaining REST APIs (OpenAPI / Swagger) Working with relational databases (PostgreSQL + advanced SQL) Implementing solutions using NoSQL (MongoDB / Redis / DynamoDB – preferred) Working with CI/CD (GitHub Actions / GitLab CI / Jenkins) Refactoring and improving existing code Code reviews and knowledge sharing within the team Requirements: Must have: Minimum 5 years of commercial experience in Java Very good knowledge of Spring → Spring Boot → Spring Data / Security / Cloud Hibernate / JPA at the level "I can explain what @EntityGraph and dirty checking do" Solid SQL knowledge + experience with PostgreSQL Understanding of REST, HTTP, authentication (JWT / OAuth2) Practical knowledge of at least one NoSQL database (Mongo / Redis / Cassandra / Dynamo) Git + CI/CD basics Very good knowledge of OOP principles and clean code Preferred (will earn big + points): Java 21, virtual threads, records, sealed classes Testing (JUnit 5 + Mockito / Testcontainers / Pact) Docker + Kubernetes / OpenShift (at least the basics) Message brokers (Kafka / RabbitMQ) Monitoring (Prometheus / Grafana / ELK) Experience in domain-driven design / hexagonal / clean architecture