Backend Developer (Java)

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive frontend architecture, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, modern tooling, and influence over architectural decisions. 🗂️ Requirements: 4–5 years of professional software development experience, Commercial Java experience, Commercial Spring Framework experience, Commercial Spring Boot experience, Commercial React.js experience, Commercial TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity, Agile environment experience 📃 Skills: Java, Spring, SpringBoot, React, TypeScript, JavaScript, AWS, SQL, HTML5, CSS3, SCSS, Jest, Kafka, Hadoop, Spark, Next.js, Redux, Zustand 🏢 Description: ✅ Your responsibilities: Design, develop, and maintain scalable full stack applications using Java and React. Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. Design and implement scalable frontend architecture and reusable UI components. Collaborate closely with Product Owners, QA Engineers, and other development teams. Integrate frontend applications with REST APIs and backend microservices. Contribute to architectural decisions and technical discussions. Ensure application performance, scalability, security, and maintainability. Participate in code reviews, sprint planning, and Agile ceremonies. Support deployment automation, production operations, and troubleshooting. Mentor less experienced developers and promote engineering best practices. 🧠 Our requirements: Minimum 4–5 years of professional software development experience. Commercial experience with Java, Spring Framework, and Spring Boot. Commercial experience with React.js and TypeScript. Solid understanding of JavaScript (ES6+). Experience working with AWS in production environments. Understanding of microservices architecture. Hands-on experience with SQL and relational databases. Experience integrating and consuming REST APIs. Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. Experience with frontend testing using Jest and React Testing Library. Familiarity with modern frontend tooling and build processes. Ability to work independently, take ownership of delivered solutions, and contribute to system design. Excellent communication skills and experience working in Agile environments ⭐ Nice to have: Experience with Kafka or other event-driven architectures. Knowledge of Hadoop or Apache Spark. Experience with Next.js. Experience with Redux, Zustand, or similar state management solutions. Previous experience in Healthcare or Life Sciences projects. 🌟 What we offer: Long-term cooperation on an international project. Flexible working hours. Opportunity to influence architecture and technical decisions. Modern technology stack. Supportive, collaborative engineering culture. Learning and development opportunities. Modern equipment and comfortable working environment.

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive interfaces, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, influence on architecture, and development opportunities. 🗂️ Requirements: 4–5+ years of professional software development experience, Commercial Java experience, Spring Framework and Spring Boot experience, React.js and TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity 📃 Skills: Java, React, Spring, SpringBoot, SQL, AWS, TypeScript, JavaScript, HTML5, CSS3, SCSS, Jest, Microservices, REST, ReactTestingLibrary 🏢 Description: ✅ Your responsibilities: Design, develop, and maintain scalable full stack applications using Java and React. Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. Design and implement scalable frontend architecture and reusable UI components. Collaborate closely with Product Owners, QA Engineers, and other development teams. Integrate frontend applications with REST APIs and backend microservices. Contribute to architectural decisions and technical discussions. Ensure application performance, scalability, security, and maintainability. Participate in code reviews, sprint planning, and Agile ceremonies. Support deployment automation, production operations, and troubleshooting. Mentor less experienced developers and promote engineering best practices. 🧠 Our requirements: Minimum 4–5 years of professional software development experience. Commercial experience with Java, Spring Framework, and Spring Boot. Commercial experience with React.js and TypeScript. Solid understanding of JavaScript (ES6+). Experience working with AWS in production environments. Understanding of microservices architecture. Hands-on experience with SQL and relational databases. Experience integrating and consuming REST APIs. Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. Experience with frontend testing using Jest and React Testing Library. Familiarity with modern frontend tooling and build processes. Ability to work independently, take ownership of delivered solutions, and contribute to system design. Excellent communication skills and experience working in Agile environments ⭐ Nice to have: Experience with Kafka or other event-driven architectures. Knowledge of Hadoop or Apache Spark. Experience with Next.js. Experience with Redux, Zustand, or similar state management solutions. Previous experience in Healthcare or Life Sciences projects. 🌟 What we offer: Long-term cooperation on an international project. Flexible working hours. Opportunity to influence architecture and technical decisions. Modern technology stack. Supportive, collaborative engineering culture. Learning and development opportunities. Modern equipment and comfortable working environment.

🏢 Summary: Opportunity to design and build secure application services and APIs, lead technical design, and resolve complex production issues. The role emphasizes reliability engineering, independent ownership, and cross-team collaboration using Python, web frameworks, cloud infrastructure, and DevOps tooling. 🗂️ Requirements: Strong Python and object-oriented programming skills, Hands-on Django or FastAPI experience, Hands-on TypeScript framework experience, RESTful API design expertise, CI/CD and DevOps tooling experience, GCP, Kubernetes, Terraform, and Helm experience, Relational database experience, Spoken English proficiency 📃 Skills: Python, Django, FastAPI, TypeScript, Angular, NestJS, REST, Jenkins, GitHub, GitLab, GCP, Kubernetes, Terraform, Helm, PostgreSQL 🏢 Description: 10+ Years of Experience is required Roles and RESPONSIBILITIES Design and build secure application services and APIs. Drive technical design discussions and translate requirements into robust solutions. Troubleshoot complex production issues and lead root-cause analysis. Improve service reliability and resilience through proactive engineering practices. Work independently with strong ownership while collaborating across teams. SKILLS & EXPERIENCE REQUIRED Strong Python skills (Python 3.11+ preferred) and solid object-oriented programming fundamentals. Hands-on experience with Django/FastAPI and TypeScript frameworks (Angular/NestJS). Excellent spoken English communication skills for day-to-day collaboration with teammates. Strong understanding of RESTful API design best practices. Familiarity with CI/CD and DevOps tooling (Jenkins, GitHub Actions, GitLab CI). Experience with GCP, Kubernetes, Terraform, and Helm. Experience with relational databases, preferably PostgreSQL. PUBLIC Strong analytical mindset, learning agility, and a problem-solving approach. Nice to have: Basic understanding of open-source software licenses (e.g., Apache-2.0, MIT, GPL) and their practical implications in software delivery. Familiarity with modern Python tooling (uv, Ruff, Rye) and Git workflows. Familiarity with Go and Java. Familiarity with identity protocols and standards: SAML, OAuth2, OpenID Connect. Proficiency with AI-assisted engineering tools such as Claude Code and Codex. Familiarity with OpenTelemetry and OpenAPI. Visible technical engagement (blogging, GitHub portfolio, open-source contributions).

🏢 Summary: Experienced Java Developer role focused on building, testing, deploying, and maintaining scalable enterprise backend applications. The position involves developing Java/Spring Boot microservices and REST APIs, working with databases, CI/CD practices, performance optimization, and secure, reliable delivery. 🗂️ Requirements: 7+ years of Java application development experience, Core Java expertise (Java 8, 11, or 17), Spring Boot and Spring MVC expertise, Microservices architecture experience, RESTful web services experience, Hibernate/JPA experience, Relational database experience, Git version control proficiency, Maven or Gradle experience, JUnit and Mockito unit-testing experience, Understanding of design patterns and object-oriented programming principles 📃 Skills: Java, Spring, SpringBoot, SpringMVC, Microservices, REST, Hibernate, JPA, SQLServer, Oracle, MySQL, PostgreSQL, Git, Maven, Gradle, JUnit, Mockito, CI/CD, DevOps 🏢 Description: We are seeking an experienced Java Developer with strong expertise in designing, developing, and maintaining enterprise-grade applications. The ideal candidate should have hands-on experience in Core Java, Spring Boot, Microservices, REST APIs, and database technologies , along with a solid understanding of software development best practices. Key Responsibilities Design, develop, test, and deploy scalable Java-based applications. Build and maintain RESTful APIs and Microservices. Develop backend services using Java, Spring Boot, and related frameworks. Collaborate with business analysts, architects, and development teams to understand requirements. Write clean, maintainable, and efficient code following coding standards. Troubleshoot, debug, and optimize application performance. Participate in code reviews and ensure high-quality deliverables. Work with CI/CD pipelines and DevOps practices for application deployment. Ensure application security, reliability, and scalability. Required Skills 7+ years of experience in Java application development. Strong expertise in: Core Java (Java 8/11/17) Spring Boot Spring MVC Microservices Architecture RESTful Web Services Hibernate/JPA Experience with relational databases such as SQL-Server, Oracle, MySQL, or PostgreSQL. Proficiency in Git and version control systems. Knowledge of Maven/Gradle build tools. Experience with unit testing frameworks like JUnit and Mockito. Understanding of Design patterns and object-oriented programming principles.

🏢 Summary: Oferta dotyczy rozwoju backendowych aplikacji enterprise w Java 17+ i Spring Boot, obejmującego tworzenie funkcjonalności, integracji, REST API oraz warstwy dostępu do danych. Kontrakt czasowy z możliwością przedłużenia, z pracą zgodną z praktykami CI/CD i standardami jakości kodu. 🗂️ Requirements: Minimum 4 lata komercyjnego doświadczenia w Java, Bardzo dobra znajomość Java 17+, Bardzo dobra znajomość Spring Boot, Praktyczne doświadczenie z REST API, Praktyczne doświadczenie z SQL, Znajomość Git, Znajomość Maven lub Gradle, Praktyka z CI/CD 📃 Skills: Java, Spring, REST, SQL, Git, Maven, Gradle, CI/CD, Docker, Kafka, Oracle 🏢 Description: Opis projektu Rozwój aplikacji backendowych w Java 17+ / Spring Boot. Implementacja nowych funkcjonalności i integracji w architekturze usługowej. Budowa i rozwój REST API oraz warstwy dostępu do danych. Praca z SQL i systemami bazodanowymi w środowisku enterprise. Rozwój rozwiązania zgodnie z praktykami CI/CD i standardami jakości kodu. Obowiązki Implementacja i rozwój funkcjonalności w Java / Spring Boot. Projektowanie i rozwój integracji oraz REST API. Optymalizacja kodu i eliminowanie problemów wydajnościowych. Udział w code review i egzekwowanie standardów jakości. Wsparcie oraz analiza testów integracyjnych w procesie delivery. Wymagania Minimum 4 lata komercyjnego doświadczenia w Java. Bardzo dobra znajomość Java 17+ i Spring Boot. Praktyczne doświadczenie z REST API i SQL. Znajomość Git oraz Maven lub Gradle. Praktyka z CI/CD. Mile widziane Docker i doświadczenie z konteneryzacją aplikacji. Kafka i komunikacja event-driven. Oracle DB. Doświadczenie w optymalizacji wydajności aplikacji backendowych. Znajomość wzorców integracyjnych i architektury aplikacji rozproszonych. Współpraca na zasadzie kontraktu czasowego z możliwością przedłużenia. Szczególnie cenione będzie doświadczenie w projektach związanych z budową, planowaniem, utrzymaniem i transformacją sieci telekomunikacyjnych oraz systemów OSS/BSS.

🏢 Summary: Oferta dla Backend Developera Java obejmuje rozwój i utrzymanie aplikacji backendowych, tworzenie funkcjonalności w Spring oraz projektowanie usług REST API. Rola obejmuje integracje z systemami zewnętrznymi, pracę z relacyjnymi bazami danych, testy jednostkowe, optymalizację i usuwanie błędów. 🗂️ Requirements: Minimum 3 lata doświadczenia w tworzeniu aplikacji Java, Bardzo dobra znajomość Spring, Dobra znajomość Java, Doświadczenie w tworzeniu REST API, Znajomość Spring Boot, Znajomość Spring Data i JPA, Znajomość Hibernate, Znajomość SQL i relacyjnych baz danych, Znajomość Git, Doświadczenie w tworzeniu testów jednostkowych, Znajomość dobrych praktyk programistycznych i OOP 📃 Skills: Java, Spring, REST, JPA, Hibernate, SQL, Git, OOP 🏢 Description: Opis projektu Poszukujemy Specjalisty Backend Developer Java odpowiedzialnego za rozwój i utrzymanie aplikacji backendowych w technologii Java oraz Spring . Rola obejmuje implementację nowych funkcjonalności, rozwój usług backendowych oraz integrację z innymi systemami i usługami. Zakres współpracy rozwój i utrzymanie aplikacji backendowych w Java implementacja nowych funkcjonalności z wykorzystaniem Spring projektowanie i rozwój usług REST API integracja aplikacji z zewnętrznymi systemami i usługami praca z relacyjnymi bazami danych tworzenie oraz utrzymywanie testów jednostkowych diagnozowanie i usuwanie błędów optymalizacja istniejących rozwiązań dbanie o jakość, czytelność i utrzymywalność kodu współpraca z pozostałymi członkami zespołu projektowego Wymagania obligatoryjne minimum 3 lata doświadczenia w tworzeniu aplikacji w technologii Java bardzo dobra znajomość Spring dobra znajomość Java doświadczenie w tworzeniu REST API znajomość Spring Boot znajomość Spring Data / JPA znajomość Hibernate znajomość SQL i relacyjnych baz danych znajomość systemu kontroli wersji Git doświadczenie w tworzeniu testów jednostkowych znajomość dobrych praktyk programistycznych i programowania obiektowego ( OOP )