Java Backend Developer

🏢 Summary: Backend Developer role focused on designing and building scalable, cloud-based applications using Java and Spring Boot in a microservices architecture. The position involves developing and deploying distributed, event-driven services on Azure using modern containerization and API technologies. The offer emphasizes building reliable, high-quality backend systems with up-to-date cloud-native practices. 🗂️ Requirements: Strong Java development experience, Experience with Spring Boot, Experience with microservices architecture, Experience with cloud-native applications, Familiarity with Azure, Knowledge of Kafka or similar messaging systems, Understanding of GraphQL or REST APIs, Experience with Docker, Experience with Kubernetes 📃 Skills: Java, Spring, SpringBoot, Microservices, Azure, Kafka, GraphQL, REST, Docker, Kubernetes 🏢 Description: We are seeking a talented Backend Developer to join our team, contributing to the design and development of modern, cloud-based applications. The role focuses on building scalable and maintainable services using up-to-date technologies and best practices. Key Responsibilities: Develop and maintain backend services using Java and Spring Boot . Build and support microservices solutions for distributed systems. Work with cloud platforms such as Azure , including event-driven architectures. Implement and consume APIs using GraphQL or REST. Package and deploy applications using Docker and Kubernetes . Collaborate with team members to deliver reliable, high-quality software. Required Skills & Experience: Strong background in Java development with Spring Boot . Experience with microservices and cloud-native applications. Familiarity with Azure , Kafka , or similar messaging/event systems. Understanding of API design ( GraphQL /REST). Practical experience with containerization ( Docker , Kubernetes ). Nice to Have: Knowledge of CI/CD practices and automated deployments. Experience with monitoring, logging, or observability in distributed systems.

🏢 Summary: Senior Java Developer role focused on building and optimizing high-throughput, event-driven backend microservices in a distributed architecture based on Kafka. The position involves designing scalable and reliable systems using modern Java and Spring Boot within an agile, international environment. Work includes performance optimization, asynchronous communication, and implementation of DDD and Event Sourcing patterns. 🗂️ Requirements: 5+ years of Java backend development experience, Strong hands-on experience with Kafka producer/consumer design and optimization, Experience with SQL and relational databases (Oracle, DB2, MSSQL or similar), Experience building distributed, high-availability, high-performance systems, Practical knowledge of Domain-Driven Design (DDD) and Event Sourcing, Experience with microservices architecture, Fluent English 📃 Skills: Java, Spring, Kafka, SQL, Oracle, DB2, MSSQL, Docker, Git, Maven, Microservices, CI/CD, DDD, EventSourcing, Splunk, Grafana 🏢 Description: We’re looking for a Senior Java Developer to support the development of business-critical backend services in a distributed, high-throughput architecture. The system is built on Kafka-based asynchronous communication and designed with a strong focus on performance, scalability, and reliability. You will be involved in designing and developing clean, event-driven microservices, working closely with experienced engineers in an international, agile setup. Tech stack Java 11+, Spring Boot Apache Kafka – producer/consumer optimization, retries, partitioning SQL: Oracle / DB2 / MSSQL Docker, Git, Maven Microservices architecture CI/CD pipelines Domain-Driven Design (DDD), Event Sourcing Monitoring: Splunk / Grafana (nice to have) What we expect 5+ years of experience in Java backend development Strong hands-on skills in Kafka producer/consumer design and optimization Solid experience in SQL and relational databases (Oracle, DB2, MSSQL or similar) Proven background in building distributed, high-availability, high-performance systems Practical understanding of DDD, Event Sourcing, microservices, and clean architecture Fluent English for daily collaboration

🏢 Summary: The offer is for a Java Backend Developer role focused on building and maintaining microservices-based systems using Java and Spring technologies. The position involves developing REST APIs, working with containerized applications, and contributing to Agile delivery processes. The role centers on backend engineering, technical design, and collaboration within cross-functional teams. 🗂️ Requirements: Minimum 3+ years professional experience in backend development, Proficiency in Java 8+, Strong experience with Spring Boot and Spring technologies, Experience building microservices, Experience working with REST APIs, Knowledge of HTTPS, SFTP, REST and SOAP protocols, Understanding of microservices architecture and containerization, Experience with Kafka, Experience with Git and GitHub, Experience with Maven and Jenkins, Experience with MySQL and SQL databases, Familiarity with Linux, Experience working in Agile/Scrum environments 📃 Skills: Java, Spring, SpringBoot, REST, Microservices, Kafka, HTTPS, SFTP, SOAP, Linux, Git, GitHub, Maven, Jenkins, Jira, MySQL, SQL, Containerization, Agile 🏢 Description: Job Description: We are looking for skilled Java Backend Developers with strong experience in Java, Spring technologies, and microservices architecture. The ideal candidate will have hands-on expertise in backend development, REST APIs, containerized applications, and Agile delivery environments. Qualifications: Minimum 3+ years of relevant professional experience Proficiency in Java 8+, REST APIs, Spring Boot, and Spring technologies Experience in building microservices and working with Kafka Solid understanding of HTTPS, SFTP, REST API, and SOAP protocols Familiarity with Linux operating systems Strong understanding of microservices architecture and containerization Knowledge of Agile frameworks and principles Experience with Git/GitHub, GitHub Actions, Maven, Jenkins, and Jira Competence with MySQL and SQL databases Strong analytical and problem-solving skills Excellent written and verbal communication skills Ability to collaborate effectively with Product, QA, DevOps, and Agile/Scrum teams Mandatory Skills: Java (Spring) REST APIs Spring Boot and Spring Technologies HTTPS, SFTP, REST API, and SOAP protocols Microservices architecture and containerization Git/GitHub, GitHub Actions, Maven, Jenkins, Jira MySQL and SQL databases Desired Skills: Strong analytical and troubleshooting abilities Excellent communication skills Team collaboration experience within Agile/Scrum environments Roles & Responsibilities: Contribute to technical design and engineering activities Develop strong domain expertise within the project Analyse functional and technical requirements Support architecture and design discussions Collaborate with Architecture and Business teams Participate in development, design, code reviews, and implementation Follow engineering best practices and support continuous improvement initiatives Out of Scope: Creating product requirements Acting as Scrum Master or Product Owner Project Details: Primary focus is on Java backend development.

🏢 Summary: The role involves developing and maintaining scalable backend services for business-critical applications using Java within an agile environment. The position focuses on building RESTful APIs, implementing persistence layers, and ensuring system quality and stability. The developer collaborates on code reviews, debugging, and continuous improvement of backend solutions. 🗂️ Requirements: Strong experience with Java 17+, Hands-on experience with Spring, Hands-on experience with Spring Boot, Knowledge of Hibernate and ORM concepts, Experience with PostgreSQL, Experience with Git version control platforms, Strong debugging skills, Experience in agile development environments 📃 Skills: Java, Spring, SpringBoot, Hibernate, PostgreSQL, REST, Git, ORM 🏢 Description: Backend Developer (Java) We are looking for a Backend Developer to join a development team responsible for building and maintaining backend services for business-critical applications. The role focuses on developing scalable, maintainable solutions and contributing to the overall quality and stability of the system within an agile setup. Responsibilities: Develop and maintain backend services using Java 17+ Design and implement RESTful APIs with Spring and Spring Boot Work with relational databases, including schema design and query optimization in PostgreSQL Implement persistence layers using Hibernate Debug, troubleshoot, and resolve backend issues Collaborate with the team using a GitHub-like platform, including code reviews and version control Participate in agile ceremonies and contribute to continuous improvement Requirements: Strong experience with Java 17+ Hands-on experience with Spring and Spring Boot Knowledge of Hibernate and ORM concepts Experience working with PostgreSQL Familiarity with GitHub-like platforms and team workflows Strong debugging and problem-solving skills Experience working in agile development environments

🏢 Summary: Senior Java Developer role focused on designing and implementing enterprise-grade backend solutions using modern architecture principles. The position emphasizes high code quality, performance, security, and collaboration within a distributed team. The role involves working with Java 17+, Spring ecosystem, databases, and event-driven systems. 🗂️ Requirements: Minimum 5 years of commercial software development experience, Very good knowledge of Java 17+, Strong understanding of object-oriented design patterns, Experience with Spring MVC and Spring Data, Experience with Apache Kafka, Ability to design relational and non-relational databases (MS SQL, Oracle, Elasticsearch, Redis), Knowledge of software engineering best practices, English proficiency for technical documentation, Ability to work effectively in a distributed team 📃 Skills: Java, Spring, SpringMVC, SpringData, Kafka, MSSQL, Oracle, Elasticsearch, Redis, OOP, UML, Docker, Kubernetes, Azure, JavaScript, React, Python 🏢 Description: We are looking for an experienced Senior Java Developer with at least 5 years of commercial experience to join a team working on enterprise-grade backend solutions. The role focuses on designing and implementing software in a modern architecture, with a strong emphasis on code quality, performance, security, and effective collaboration within a distributed team. Responsibilities Design and implement software using hexagonal architecture. Develop backend solutions using Java 17+ and the Spring ecosystem. Ensure high code quality and compliance with agreed development standards. Analyse system performance, security, and stability, and propose improvements. Design and optimise data structures for relational and non-relational databases. Collaborate with a distributed team, participate in technical analysis, code reviews, and solution design. Identify technical challenges and propose improvements to architecture and implementation. Requirements Minimum 5 years of commercial software development experience. Very good knowledge of Java 17+. Strong understanding of object-oriented design patterns and software engineering best practices. Experience with the Spring stack, especially Spring MVC and Spring Data. Knowledge of Apache Kafka. Ability to design databases: relational: MS SQL, Oracle, non-relational: Elasticsearch, Redis. English skills sufficient to work with technical documentation. Strong analytical and creative problem-solving skills. Excellent communication skills and ability to work effectively in a distributed team. Nice to have Knowledge of scripting/frontend technologies such as JavaScript, React, Python. Experience working in an Azure cloud environment. Familiarity with Kubernetes and Docker. Ability to design system architecture and prepare High-Level Design (HLD) documentation. Knowledge of UML and flow diagrams.

🏢 Summary: Opportunity for a Senior/Strong Mid Java Developer to design and build high-performance APIs and integrations connecting core systems with global brokers. The role focuses on developing scalable microservices architecture, managing high-traffic applications, and ensuring robust CI/CD practices. You will drive strategic system integrations and contribute to modernizing infrastructure for global scale. 🗂️ Requirements: 5+ years of Java experience, Strong knowledge of Spring and Hibernate, Experience designing REST APIs, Proficiency with SQL and relational databases, Experience with Maven in large-scale projects, Understanding of microservices architecture, Knowledge of design patterns, Experience with CI/CD tools, Ability to work with Java 8/17/21, English and Polish communication skills 📃 Skills: Java, Spring, Hibernate, SQL, REST, Maven, Git, TeamCity, Microservices, React, Kafka 🏢 Description: Take ownership of our platform's expansion by building high-performance bridges between our core systems and global external brokers. We are looking for a developer who combines deep Java expertise with an architectural mindset. Your Impact: Strategic Integrations: Design and build high-quality Java 8/17/21 APIs from scratch to enable seamless, scalable connectivity with international partners and brokers. Architecture Evolution: Contribute to modern, service-oriented designs using microservices to ensure our infrastructure is resilient and ready for global scaling. Data Mastery: Manage high-traffic applications using Spring, Hibernate, and SQL, ensuring peak performance and data consistency. Modern Engineering: Drive excellence via Git, Maven, and TeamCity, upholding high standards for CI/CD, clean code, and documentation. Full-Stack Awareness: Use your React knowledge to design user-centric APIs that are practical and easy for both internal and external teams to consume. Global Synergy: Collaborate across international borders, communicating effectively in both Polish and English to ensure smooth project delivery. What Supports Your Success: Experience: 5+ years of Java expertise (Senior or strong Mid+) with deep Spring & Hibernate knowledge. Technical Core: Mastery of REST API design, SQL, and large-scale Maven applications. Architectural Flair: Solid understanding of design patterns and microservices. Bonus Points: Experience with Apache Kafka, DDD/Hexagonal architecture, or migrating monoliths to microservices. Domain: Previous experience in Fintech is a significant plus.

🏢 Summary: Backend Software Engineer focused on digital transformation, responsible for modernizing legacy monolithic systems into cloud-native microservices architectures. The role involves building event-driven solutions, high-performance REST APIs, and managing containerized workloads on AWS/GCP with strong emphasis on code quality and end-to-end ownership. Predominantly remote position contributing to a large-scale digital agenda in a fast-paced environment. 🗂️ Requirements: 5+ years professional software development experience, Proven experience with distributed systems, Strong proficiency in Java, Strong proficiency in Spring Boot and Spring Data, Experience with Docker and Kubernetes, Experience with AWS or GCP, Experience implementing event-driven architectures with Apache Kafka, Experience designing and developing RESTful APIs using OpenAPI/Swagger, Fluent English, Fluent Spanish 📃 Skills: Java, Spring, SpringBoot, SpringData, Docker, Kubernetes, AWS, GCP, Kafka, REST, OpenAPI, Swagger, CI/CD, Microservices 🏢 Description: We are seeking a highly skilled Backend Software Engineer with a focus on Digital Transformation . The ideal candidate will have extensive experience in modernizing legacy systems and a strong background in developing microservices architectures. Proven expertise in API development, cloud platforms, and containerized environments is crucial for this role. The individual will play a key role in driving innovative solutions while upholding the highest standards of code quality and delivery. Key Responsibilities Modernization: Drive the transition from legacy monolithic architectures to modular, microservice-based systems. Event-Driven Architecture: Design and implement robust streaming pipelines and messaging solutions (Apache Kafka) to handle high-volume, real-time data. API-First Engineering: Develop and maintain high-performance RESTful APIs, adhering to OpenAPI/Swagger standards. Cloud-Native Delivery: Manage containerized workloads on cloud platforms (AWS/GCP) using Kubernetes, with a focus on CI/CD automation. Code Quality: Uphold engineering excellence through comprehensive unit/integration testing, pair programming, and rigorous architectural design reviews. Ownership: Take end-to-end responsibility for features from initial design to production deployment and observability. Key Requirements 5+ years in professional software development with a proven track record in distributed systems. Deep proficiency in Java and the Spring ecosystem (Spring Boot, Spring Data). Solid experience with containerization (Docker, Kubernetes) and cloud platforms (AWS, GCP). Proven ability to implement event-driven solutions using tools like Apache Kafka. Analytical problem-solver, comfortable navigating ambiguity, and passionate about continuous improvement/Clean Code. Fluent in English and Spanish, with the ability to bridge technical and business requirements. Nice to Have Experience with DevOps practices and CI/CD tools. Familiarity with Agile methodologies. Understanding of cloud security best practices. Other Details This position is focused on contributing to a transformative digital agenda, predominantly remote, with opportunities for collaboration across various teams. Ideal candidates will exhibit flexibility and readiness to adapt to new challenges in a fast-paced environment.

🏢 Summary: The offer is for a Java Developer to work on backend applications within a microservices architecture. The role involves developing and maintaining RESTful microservices, integrating systems using synchronous and asynchronous communication, and ensuring high code quality and performance. The position also includes participation in testing and deployment of new functionalities. 🗂️ Requirements: Minimum 3 years of experience in Java development, Strong knowledge of Java 21+, Practical experience with Spring Boot 3+, Experience in designing and developing microservices architecture, Knowledge of Kafka or MQ, Experience with PostgreSQL, Experience with MongoDB, Knowledge of REST API, Experience with Docker, Experience with Git, Experience with Maven, Experience with JUnit or Spock, Knowledge of design patterns 📃 Skills: Java, SpringBoot, Microservices, Kafka, PostgreSQL, MongoDB, REST, Docker, Git, Maven, JUnit, Spock 🏢 Description: Poszukujemy osoby na stanowisko Java Developera do projektu realizowanego w środowisku opartym o architekturę mikroserwisową. Osoba na tym stanowisku będzie odpowiedzialna za rozwój oraz utrzymanie aplikacji backendowych, integracje między systemami oraz współtworzenie rozwiązań wspierających kluczowe procesy biznesowe. Zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji backendowych w technologii Java. Tworzenie oraz rozwój mikroserwisów i interfejsów REST API. Realizacja integracji pomiędzy systemami z wykorzystaniem komunikacji synchronicznej i asynchronicznej. Współpraca przy analizie wymagań oraz projektowaniu rozwiązań technicznych. Dbanie o jakość kodu poprzez code review oraz stosowanie dobrych praktyk programistycznych. Optymalizacja wydajności aplikacji i rozwiązywanie problemów technicznych. Udział w procesie testowania i wdrażania nowych funkcjonalności. Wymagania Minimum 3 lata doświadczenia w programowaniu w języku Java. Bardzo dobra znajomość Java 21+. Praktyczne doświadczenie w pracy ze Spring Boot 3+. Doświadczenie w projektowaniu i rozwijaniu architektury mikroserwisowej. Znajomość Kafka lub MQ. Doświadczenie w pracy z PostgreSQL oraz MongoDB. Znajomość REST API. Umiejętność pracy z Docker, Git oraz Maven. Doświadczenie w testowaniu aplikacji z wykorzystaniem JUnit lub Spock. Znajomość wzorców projektowych. Umiejętność pracy zespołowej oraz samodzielnego rozwiązywania problemów. Mile widziane Jenkins lub GitLab. OpenShift lub Kubernetes. Camunda lub inne rozwiązania BPM/Workflow. Grafana, Kibana lub Dynatrace. Doświadczenie w pracy w metodykach Agile/Scrum.

🏢 Summary: Senior Java Backend Developer role focused on designing, developing and maintaining reliable, high-performance and scalable backend services in a microservices environment. The position involves continuous improvement, production monitoring, and close collaboration with cross-functional teams to ensure service quality and stability. Strong emphasis on CI/CD practices and cloud-based environments. 🗂️ Requirements: 6–9 years of Java development experience, Proven experience with Spring Boot, Experience building and maintaining microservices, Experience in high-volume production environments, Strong knowledge of CI/CD concepts, Hands-on experience with GitLab pipelines, Knowledge of Azure or ability to work in Azure environments, Ability to collaborate with cross-functional technical teams 📃 Skills: Java, Spring, SpringBoot, Microservices, CI/CD, GitLab, Azure, Docker, Kafka, DB2 🏢 Description: Résumé Le développeur back-end Java senior a pour mission de concevoir, développer et maintenir des services backend fiables, performants et évolutifs, tout en garantissant une expérience utilisateur de qualité. Responsabilités : Concevoir, développer et maintenir des services backend. Contribuer à la qualité du produit en ajoutant de la valeur pour l'utilisateur. Analyser le comportement du service en production et anticiper les dégradations. Participer à l'amélioration continue des services (refactorings, performance, sécurité). Assurer la responsabilité du service post-mise en production. Collaborer avec les équipes Produit, QA, DevOps, Cloud et Architecture. S'inscrire dans une logique orientée résultat. Compétences Requises : 6 à 9 ans d'expérience en développement Java. Expérience confirmée sur Spring Boot et microservices. Travail sur des environnements à forte volumétrie. Maîtrise des concepts CI/CD et pipelines GitLab. Connaissance ou capacité à monter en compétence sur Azure. Aisance en collaboration avec des équipes pluridisciplinaires. Atouts : Expérience avec Docker. Connaissances en Kafka ou systèmes de messaging. Maîtrise d'autres bases de données relationnelles (DB2).

🏢 Summary: Senior Java Spring Boot Backend Developer role focused on building and modernizing a cloud-native Messaging Delivery Platform in the financial sector. The position involves developing scalable microservices, APIs, and containerized applications deployed on AWS using Kubernetes. It combines hands-on backend engineering with DevOps practices in an Agile environment. 🗂️ Requirements: Minimum 6 years of Java development experience, Strong hands-on experience with Spring Boot, Experience with microservices architecture, Practical experience with Kubernetes, Experience with AWS cloud environment, Experience with CI/CD tools (Jenkins, GitHub, Maven, Groovy), Strong knowledge of API design (REST, Swagger, OpenAPI, JSON), Experience with OAuth2 and API Gateway solutions, Experience working in Agile (Scrum, TDD), Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Microservices, Kubernetes, AWS, Jenkins, GitHub, Maven, Groovy, REST, Swagger, OpenAPI, JSON, OAuth2, Kong, CI/CD, TDD, Scrum 🏢 Description: Unleash innovation at scale — drive the future of cloud-native, microservices architectures! Krakow-based opportunity with hybrid work model (3 remote days per week). As a Senior Java Spring Boot Backend Developer , you will be working for our client in the financial industry, focusing on the Messaging Delivery Platform—centralizing and modernizing message delivery to bank customers across multiple channels. Join a cutting-edge project that shapes the future of client communication through advanced distributed systems and cloud technology. Your main responsibilities: Develop high-quality, scalable backend applications using Java and Spring Boot, ensuring adherence to technical requirements and standards. Collaborate within a multidisciplinary Agile team to design, build, and enhance distributed microservices architectures. Implement and monitor API solutions using Swagger, OpenAPI, REST, and JSON standards, ensuring best practices. Deploy and manage containerized applications on Kubernetes, leveraging AWS cloud infrastructure. Integrate authentication and authorization mechanisms such as OAuth 2 and API Gateway solutions. Write and execute unit tests, contribute to automation testing efforts, and uphold quality benchmarks. Participate in code reviews, challenge implementations to maintain highest quality standards, and promote innovation. Keep abreast of current technologies, tools, and industry best practices, continuously enhancing your expertise. Support and mentor team members to foster a culture of technical excellence and knowledge sharing. You're ideal for this role if you have: Minimum 6 years of experience in Java development within a senior or expert capacity. Strong hands-on expertise with Spring Boot framework and microservices architecture. Practical experience with Kubernetes and Cloud environments, particularly AWS. Proficiency with CI/CD tools such as Jenkins, GitHub, Maven, and Groovy scripting. Deep understanding of API design principles, including Swagger, OpenAPI 3.0, REST, and JSON. Familiarity with authentication protocols like OAuth 2 and API Gateway solutions such as Kong. Robust knowledge of Agile practices, especially TDD and Scrum methodologies. Ability to work fluently in English, with excellent communication skills. It is a strong plus if you have: Certifications or additional experience with AWS services. Knowledge of automation testing frameworks. Experience with messaging systems or middleware. 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.