Senior Java Backend Developer – Financial Technology

🏢 Summary: Senior Java Developer role focused on building and maintaining high‑transaction financial systems using modern Java and SpringBoot technologies. The position involves designing scalable backend solutions, integrating messaging and monitoring tools, and contributing to CI/CD pipelines in an agile environment. Remote work model with a Warsaw-based team. 🗂️ Requirements: 7+ years of Java software development experience, Strong expertise in Java 21+, Experience with SpringBoot 3, Experience with PostgreSQL and Hibernate, Knowledge of DDD principles, Experience with ELK, Dynatrace, Redis, Experience with RabbitMQ and Kafka, Experience with Gitlab, Jenkins, OpenShift, Experience with Junit 5, Mockito, RestAssured, Experience with CI/CD pipelines, Experience with high-transaction online systems, Good command of Polish, Communicative English, Legal right to work in the EU 📃 Skills: Java, SpringBoot, PostgreSQL, Hibernate, DDD, ELK, Dynatrace, Redis, RabbitMQ, Kafka, Gitlab, Jenkins, OpenShift, Junit5, Mockito, RestAssured, CICD, Scrum, Kanban 🏢 Description: Unleash innovation — build transformative Java solutions for the finance sector! Warszawa-based opportunity with remote work model. As a Senior Java Developer , you will be working for our client, a leader in the financial industry, dedicated to developing and supporting high-transactional internet systems. Join a passionate team to create impactful, scalable solutions that shape the future of finance technology and foster career growth. Your main responsibilities: Develop and maintain robust applications using Java 21+ and SpringBoot 3, ensuring high performance and scalability. Design and implement database solutions with PostgreSQL, applying best practices in DDD. Collaborate in agile teams, utilizing methodologies such as Scrum or Kanban, to deliver innovative features. Integrate and optimize system components with tools like ELK, Redis, Dynatrace, and messaging systems like RabbitMQ and Kafka. Write comprehensive unit and integration tests using Junit 5, Mockito, and RestAssured. Participate in CI/CD pipelines with Gitlab, Jenkins, and OpenShift to streamline deployment workflows. Analyze system performance and troubleshoot issues to maintain optimal operation. You're ideal for this role if you have: At least 7 years of experience in software development, primarily with Java-based solutions. Strong expertise with Java 21+ and SpringBoot 3. Experience working with PostgreSQL, Hibernate, and DDD principles. Familiarity with ELK, Dynatrace, Redis, RabbitMQ, Kafka. Proficiency in CI/CD tools like Gitlab, Jenkins, and OpenShift. High analytical skills and experience supporting transactional online systems, preferably in finance. It is a strong plus if you have: Knowledge of agile methodologies such as Scrum or Kanban. Certifications or additional expertise in financial systems or back-end architecture. Language Required for the role: Polish: good command required English: communicative proficiency 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. Internal number #8853

🏢 Summary: Senior Java Developer role focused on building and integrating enterprise financial applications within a high-impact reporting platform, working in a hybrid model in Warsaw. The position involves developing scalable Java-based services, optimizing system performance, and contributing to digital transformation initiatives in an Agile environment. 🗂️ Requirements: Minimum 5 years of professional experience in Java development for enterprise applications, Advanced knowledge of Java, Spring, Spring Boot, Hibernate, JPA, REST APIs, Experience with Oracle databases and SQL, Experience with DevOps practices, Familiarity with SOAP services, Experience working in Agile methodologies, Knowledge of Maven and RabbitMQ, Communicative level of Polish, Good command of English (B2 level), Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, REST, SOAP, Oracle, SQL, Maven, RabbitMQ, Agile, DevOps 🏢 Description: Empower scalable financial solutions — drive innovation in enterprise applications! Warszawa-based opportunity with 100% remote work model. As a Senior Java Developer , you will be working for our client, a leading provider of financial reporting and corporate application services. You’ll contribute to the development and integration of innovative services within a high-impact platform used for financial statements and operational metrics, supporting complex decision-making processes. This role offers a unique chance to work at the forefront of digital transformation and deepen your technical expertise in a vibrant, evolving environment. Your main responsibilities: Develop, maintain, and optimize enterprise-level Java applications with advanced knowledge of Spring, Hibernate, JPA, and RESTful APIs. Integrate services with the Bali group application, ensuring seamless data flow and system reliability. Collaborate in an Agile environment, contributing to system analysis, testing, and continuous improvement initiatives. Implement DevOps practices and utilize Oracle databases to enhance system performance and scalability. Support the development of new features and functions aligned with client requirements and industry standards. Write comprehensive unit tests to ensure code quality and maintainability. Engage in system analysis and troubleshooting, delivering timely resolutions. Work closely with cross-functional teams, including product owners and QA, to ensure successful project delivery. You're ideal for this role if you have: At least 5 years of professional experience in Java development, focused on enterprise applications. Advanced proficiency in Java, Spring, Boot, Hibernate, JPA, and REST APIs. Experience working with Oracle databases, both SQL and data management tools. Familiarity with DevOps practices and SOAP services. Strong understanding of Agile methodologies and experience with tools like Maven and RabbitMQ. Good command of English (B2 level). It is a strong plus if you have: (optional) Knowledge of PostgreSQL and additional experience with system analysis techniques. Certification in Scrum or related Agile frameworks. Language Required for the role: Polish (Communicative level). Eligibility to work on this 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: Senior Java Developer role focused on building and optimizing scalable backend systems for real-time data processing in a fully remote environment. The position involves developing Java 17+ and Spring Boot applications, managing Kafka streams, implementing CI/CD pipelines, and maintaining high-quality testing and database solutions. 🗂️ Requirements: 5+ years of Java development experience, Java 17+ proficiency, Spring Boot expertise, REST API design experience, Apache Kafka experience, JUnit knowledge, Mockito knowledge, CI/CD experience, Jenkins familiarity or GitLab CI familiarity, Good Polish language skills, Communicative English level, Legal right to work in the European Union 📃 Skills: Java, Spring, Kafka, JUnit, Mockito, REST, Jenkins, GitLab, PostgreSQL, RabbitMQ, OpenShift, Prometheus, Grafana, JMeter 🏢 Description: Unleash innovative backend solutions — shape the future of real-time data processing! 100% remote work. As a Senior Java Developer, you will be working for a client focused on building robust, scalable software solutions. You will contribute to advancing data-driven platforms, delivering impactful backend components that support critical business operations and digital transformation. Your main responsibilities: - Develop and optimize Java 17+ applications with Spring Boot, focusing on REST API creation and integration. - Design and write automated tests, including unit, integration, contract, and API testing using JUnit, Mockito, and REST Assured. - Manage Apache Kafka streams, ensuring seamless real-time data processing and system reliability. - Implement CI/CD pipelines with Jenkins or GitLab CI to improve development workflows. - Maintain and enhance PostgreSQL database solutions, ensuring data integrity and performance. - Collaborate across teams to troubleshoot and resolve complex technical issues. - Document technical specifications and participate in code reviews. You’re ideal for this role if you have: - At least 5 years of professional experience in Java development. - Advanced knowledge of Java 17+, Spring Boot, and REST API design. - Proven expertise with Apache Kafka. - Experience with testing frameworks such as JUnit and Mockito. - Familiarity with CI/CD tools like Jenkins or GitLab CI. Nice to have: - Working knowledge of PostgreSQL and RabbitMQ. - Experience with OpenShift, Prometheus, Grafana, or JMeter. Language requirements: - Polish: Good command. - English: Communicative level. Eligibility: - Only candidates with an existing legal right to work in the European Union will be considered. Interested candidates should apply with a CV, preferably in English, including consent to the processing and storage of personal data.

🏢 Summary: Senior Java Developer role focused on building scalable REST API services for omnichannel banking platforms in a fully remote environment. The position involves backend development, system integration with MongoDB and Kafka, performance optimization, and collaboration on long-term banking technology initiatives. 🗂️ Requirements: 5+ years of Java development experience, Banking or financial services industry experience, Advanced Java knowledge, Experience with MongoDB, Experience with Kafka or similar messaging systems, Polish language proficiency, English communication skills, Legal right to work in the European Union 📃 Skills: Java, REST, MongoDB, Kafka, API 🏢 Description: Ignite innovation — shape the future of banking technology! 100% remote. As a Senior Java Developer , you will be working for our client, a leading provider of banking systems specializing in omnichannel solutions for internet, mobile, and branch backoffice systems. You will help build robust, scalable REST API services that drive seamless banking experiences, fostering innovation in financial technology and enhancing customer engagement. Your main responsibilities: Design and develop high-performance REST API services tailored for banking omnichannel platforms. Collaborate with cross-functional teams to implement scalable backend solutions using Java. Ensure the integration of backend systems with databases like MongoDB and message brokers such as Kafka. Maintain high code quality through rigorous testing and code reviews. Optimize system performance and troubleshoot issues efficiently. Stay updated with the latest technologies and best practices in Java development and banking solutions. Participate in long-term technical planning and continuous improvement initiatives. You're ideal for this role if you have: At least 5 years of experience in Java development within the banking or financial services industry. Advanced knowledge of Java technologies and frameworks. Proven experience working with MongoDB databases. Hands-on experience with Kafka or similar messaging systems. Good command of Polish. Communicative proficiency in English. It is a strong plus if you have : Certifications in Java or related technologies. Experience with REST API security standards and best practices. Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role.

🏢 Summary: Senior Java Developer role focused on building secure, scalable enterprise banking applications using modern Java and Spring technologies in a hybrid work model. The position involves developing high-performance REST APIs, managing databases, and supporting CI/CD pipelines within a complex enterprise environment. You will collaborate with cross-functional teams to deliver robust financial solutions. 🗂️ Requirements: 5+ years of Java development experience in enterprise environments, Strong expertise in Java and Spring Boot, Experience with JPA and REST API development, Proficiency with PostgreSQL and Oracle databases, Knowledge of security patterns and testing frameworks, Experience with CI/CD and containerization tools, Communicative proficiency in Polish, Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, JPA, REST, PostgreSQL, Oracle, JUnit, Mockito, OpenShift, Jenkins, GitLab, Maven, Liquibase, Postman, RabbitMQ, Kafka, MongoDB, Camunda, CICD 🏢 Description: Unleash innovation — drive the future of enterprise software development! Wroclaw/Poznań-based opportunity with hybrid work model (up to 4 remote days per week). As a Senior Java Developer , you will be working for our client, a leader in the banking sector dedicated to delivering cutting-edge financial solutions. You will help build robust, secure, and scalable enterprise applications that empower banking institutions and SME clients across Europe. Join us in shaping the digital transformation of financial services and advancing your career in a dynamic, innovative environment. Your main responsibilities: Develop and maintain high-performance Java applications using Spring Boot (preferably 21/25 versions) and Spring frameworks. Design, implement, and optimize REST APIs with security best practices. Collaborate closely with testers, analysts, and Product Owners to deliver seamless solutions. Manage databases including PostgreSQL, Oracle, and utilize JPA for persistence layer development. Use architectural tools such as Postman, Liquibase, Jenkins, Gitlab, Maven, and OpenShift to ensure continuous integration and delivery. Contribute to system security design, integrating technologies like Mockito, JUnit, RabbitMQ, Kafka, and MongoDB. Participate in code reviews, architectural discussions, and testing for quality assurance. Support deployment pipelines and collaborate with cross-functional teams to deliver excellence. You're ideal for this role if you have: 5+ years of experience in Java development within enterprise environments. Strong expertise in Java, Spring (preferably 21/25), JPA, and REST API development. Proficiency in database management, including PostgreSQL and Oracle. Solid knowledge of security patterns and testing frameworks such as JUnit and Mockito. Experience working with containerization and CI/CD tools like OpenShift, Jenkins, and Gitlab. Comfortable working in a collaborative environment with testers, analysts, and Product Owners. It is a strong plus if you have: (optional) Experience with RabbitMQ, Kafka, or MongoDB. Familiarity with Camunda BPM and banking industry solutions. Certifications or knowledge related to these technologies. Language Required for the role: Communicative proficiency in Polish. 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. We offer you At ITDS , you will work on innovative and impactful technology projects for international companies across multiple industries in Europe and beyond. We create an environment for ambitious, driven professionals who want to grow, deliver value, and build their careers in modern IT and digital transformation. Our offer includes: Stable and long-term cooperation with attractive conditions Opportunities to develop your technical expertise across various industries and technologies The chance to work on high-impact, strategic IT and digital transformation projects A clear career path and the opportunity to grow quickly by contributing to diverse client initiatives over time International environment , knowledge sharing, social events, and training opportunities Access to an attractive medical package Access to the Multisport program Access to learning platforms such as Pluralsight Flexible working hours and remote work options Internal number #8702

🏢 Summary: Senior Java Developer role focused on building and integrating AI-powered financial solutions using Java, Spring Boot, and large language models in a fully remote environment. The position involves developing scalable AI systems, implementing agent-based architectures, and supporting AI-driven development workflows across cross-functional teams. 🗂️ Requirements: 5+ years of professional IT experience, Strong expertise in Java, Strong expertise in SpringBoot, 1+ year of hands-on experience deploying LLMs in production, Knowledge of agent-based architectures, Experience with SpringAI, Experience with LangChain4j, Experience with LLM API integrations, Experience with embeddings, Experience with vector databases, Familiarity with AI observability tools, Ability to lead technical workshops, STEM background, Good command of Polish, Communicative English, Legal right to work in the European Union 📃 Skills: Java, SpringBoot, SpringAI, LangChain4j, LLMs, ReAct, MCP, Copilot, Claude, APIs, Embeddings, VectorDB, Observability, Angular, Python, TypeScript 🏢 Description: Empower AI innovation—shape the future of intelligent finance solutions! 100% remote work. As a Senior Java Developer , you will be working for our client, a leader in the financial technology industry, focusing on integrating advanced AI tools into scalable systems. You will contribute to pioneering AI adoption using Java and Spring Boot within a collaborative, cross-team environment. Join us and help shape the future of intelligent finance solutions while accelerating your career growth. Your main responsibilities: Develop and optimize Java-based applications and AI-powered features employing Spring Boot, ensuring high performance and reliability. Lead the adoption and integration of AI-SDLC tools such as GitHub Copilot, Claude Code, and Copilot Extensions within development workflows. Design and implement agentic and multi-agent system architectures, including ReAct patterns, MCP, and orchestration frameworks. Collaborate on integrating LLMs via APIs, embeddings, vector databases, and ensuring observability and security in AI systems. Conduct workshops and knowledge-sharing sessions on AI workflows, agentic development, and security best practices. Contribute to specification-driven development processes, ensuring scalable and maintainable codebases. Support continuous delivery and deployment pipelines with a focus on AI system integration. Engage in cross-team collaboration to foster innovative AI-driven solutions in finance. You're ideal for this role if you have: 5+ years of professional experience in IT, with extensive Java and Spring Boot expertise. At least 1+ year of hands-on experience deploying Large Language Models (LLMs) in production environments. Deep knowledge of agent-based architectures such as ReAct, MCP, and orchestration frameworks. Experience with Spring AI, LangChain4j, LLM API integrations, embeddings, and vector databases. Familiarity with observability tools for AI systems and development of specification-driven solutions. Proven ability to lead workshops and facilitate technical discussions. A background in STEM disciplines. It is a strong plus if you have: (optional) Experience with Angular, Python, or TypeScript. Knowledge of enterprise LLM integrations and advanced AI security measures. Language required for the role: Polish: Good command English: Communicative level Eligibility to work in: 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: Senior Java Developer role focused on building and enhancing scalable digital banking solutions in a hybrid Krakow-based setup. The position involves developing microservices and REST APIs, supporting CI/CD pipelines, and ensuring high-quality, secure applications used by millions of customers worldwide. 🗂️ Requirements: 5+ years experience as Java Software Engineer, Strong knowledge of Java and Spring, Experience with REST APIs, Experience with microservices architecture, Experience with Docker, Experience with CI/CD in Jenkins, Experience with TDD, Understanding of data structures and algorithms, Knowledge of secure application design, Experience working in Agile teams, Fluent English, Legal right to work in the EU 📃 Skills: Java, Spring, REST, Microservices, Docker, Jenkins, CI/CD, TDD, Agile, Algorithms, Security, OOP, Concurrency 🏢 Description: Ignite innovation in digital banking — empower seamless financial experiences worldwide! Krakow-based opportunity with hybrid work model As a Senior Java Developer – Digital Banking Solutions , you will be working for our client, a leading global bank, driving forward their most exciting digital revolution. You’ll be contributing to impactful solutions that influence the banking behavior of over 37 million customers worldwide, shaping the future of digital finance through innovative technology. This is a unique career opportunity to collaborate with a dynamic team of experts from world-renowned technology companies and to be at the forefront of digital evolution in banking. Your main responsibilities: Design, develop, and test scalable microservices using Java within an agile environment. Implement robust REST APIs and integrate new features into existing digital solutions. Champion test-driven development (TDD) practices and ensure high-quality code through troubleshooting and debugging. Collaborate closely with cross-functional teams to deliver end-to-end digital banking products and services. Contribute to automation efforts and support the deployment pipeline with CI/CD pipelines in Jenkins and Docker. Assist in optimizing system performance and enhancing security measures. Participate in continuous improvement initiatives and adopt innovative technologies to improve processes. Provide production support and troubleshooting for live environments. You're ideal for this role if you have: 5+ years of professional experience as a Java Software Engineer. Strong knowledge of Java, Spring, REST, Docker, CI/CD in Jenkins, and microservices architecture. Experience with test-driven development (TDD) and troubleshooting skills. Experience working in an agile, cross-functional team. Good understanding of data structures, algorithms, and secure application design. Proven ability to adapt and learn new technologies rapidly. It is a strong plus if you have: (optional) Knowledge of concurrency in Java, OOP principles, or clean code practices. Certifications in Java or related fields. Language Required for the role: Fluent English, with excellent communication skills. Eligibility to work on this 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: Senior Java Developer role focused on building and enhancing scalable digital banking solutions in a hybrid Krakow-based environment. The position involves designing microservices, implementing REST APIs, and supporting CI/CD pipelines to deliver secure, high-quality banking products for millions of users worldwide. 🗂️ Requirements: 5+ years of professional experience as Java Software Engineer, Strong knowledge of Java and Spring, Experience with REST APIs and microservices architecture, Experience with Docker and CI/CD in Jenkins, Experience with test-driven development (TDD), Strong troubleshooting and debugging skills, Understanding of data structures and algorithms, Knowledge of secure application design, Experience working in agile cross-functional teams, Fluent English, Legal right to work in the European Union 📃 Skills: Java, Spring, REST, Microservices, Docker, Jenkins, CI/CD, TDD, Algorithms, Security, Agile 🏢 Description: Ignite innovation in digital banking — empower seamless financial experiences worldwide! Krakow-based opportunity with hybrid work model As a Senior Java Developer – Digital Banking Solutions , you will be working for our client, a leading global bank, driving forward their most exciting digital revolution. You’ll be contributing to impactful solutions that influence the banking behavior of over 37 million customers worldwide, shaping the future of digital finance through innovative technology. This is a unique career opportunity to collaborate with a dynamic team of experts from world-renowned technology companies and to be at the forefront of digital evolution in banking. Your main responsibilities: Design, develop, and test scalable microservices using Java within an agile environment. Implement robust REST APIs and integrate new features into existing digital solutions. Champion test-driven development (TDD) practices and ensure high-quality code through troubleshooting and debugging. Collaborate closely with cross-functional teams to deliver end-to-end digital banking products and services. Contribute to automation efforts and support the deployment pipeline with CI/CD pipelines in Jenkins and Docker. Assist in optimizing system performance and enhancing security measures. Participate in continuous improvement initiatives and adopt innovative technologies to improve processes. Provide production support and troubleshooting for live environments. You're ideal for this role if you have: 5+ years of professional experience as a Java Software Engineer. Strong knowledge of Java, Spring, REST, Docker, CI/CD in Jenkins, and microservices architecture. Experience with test-driven development (TDD) and troubleshooting skills. Experience working in an agile, cross-functional team. Good understanding of data structures, algorithms, and secure application design. Proven ability to adapt and learn new technologies rapidly. It is a strong plus if you have: (optional) Knowledge of concurrency in Java, OOP principles, or clean code practices. Certifications in Java or related fields. Language Required for the role: Fluent English, with excellent communication skills. Eligibility to work on this 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: Senior Java Developer role focused on building and evolving a globally distributed trading platform for fixed income products. The position involves designing and implementing high-quality software components, supporting platform optimization and migration, and collaborating with international IT teams. It requires strong expertise in Core Java, Spring, and SQL within enterprise-level systems. 🗂️ Requirements: At least 5 years of experience in software development, Strong knowledge of Core Java, Proficiency in SQL, Proficiency in Spring framework, Strong written and verbal English, Ability to work collaboratively in a global team environment 📃 Skills: Java, SQL, Spring, JMS, ORM, REST, WebServices, TCP/IP, Bash, Perl, Python, C++, Redis, Multithreading, Networking, Scrum, Kanban 🏢 Description: We are seeking a Senior Java Developer to join a leader in the financial domain who has been successfully involved in trading financial (Fixed income) products for many years. As part of this, a globally distributed, component-based IT system has been built. It is written mainly in Java and incorporates many enterprise technologies/standards (e.g., JMS, ORM, Spring, WebServices, REST), but also integrates other technologies, like TCP/IP networking, bash scripting, Perl, Python or even C++. Responsibilities Design and implement software components according to requirements Take responsibility for ensuring the delivery and quality standards of software Spend time with the customer to determine and understand deliverables Support business in platform rationalization and optimization Continue removing technical debt and platform standardization Support business in migration to strategic platform Work with other IT teams across the globe Requirements At least 5 years of working experience in software development Strong knowledge of Core Java Proficiency in SQL and Spring framework Good communication and time management skills Team player mentality with a pragmatic approach to software development Strong written and verbal English Nice to have Skills in multithreading, networking and web services in Java Familiarity with JMS and Redis Capability to acquire and capture requirements with attention to software quality Understanding of investment banking domain Understanding of Agile principles (experience in Scrum or Kanban) We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview We will reach out to selected candidates exclusively

🏢 Summary: Senior Java Developer role focused on building and maintaining scalable microservices and cloud-based digital products in the OTT/ECommerce industry within an Agile environment. The position involves backend development, architectural contributions, CI/CD support, and collaboration with cross-functional teams using modern Java and cloud technologies. Hybrid or remote work model based in Warszawa. 🗂️ Requirements: 4+ years of Java development experience, Java 8-25, Multithreading, Immutability, Design patterns, Spring Boot, Spring MVC, WebFlux, MyBatis, TestContainers, SQL, NoSQL databases, Oracle, PostgreSQL, MongoDB, Redis, Kafka, Microservices architecture, RESTful APIs, Kubernetes, Docker, AWS, JUnit, Mockito, Spock, Jenkins, GitLab, Unix/Linux scripting, Polish language proficiency, Communicative English, Legal right to work in the EU 📃 Skills: Java, Spring, WebFlux, MyBatis, TestContainers, SQL, Oracle, PostgreSQL, MongoDB, Redis, Kafka, REST, Kubernetes, Docker, AWS, JUnit, Mockito, Spock, Jenkins, GitLab, Unix, Linux, SCRUM, Confluence, Git 🏢 Description: Empower digital transformation — craft scalable solutions with Java and cloud innovation! Warszawa-based opportunity with hybrid/ remote work model. As a Senior Java Developer , you will be working for our client, a leading player in the OTT/ECommerce industry, focused on delivering cutting-edge digital products within a dynamic and collaborative environment. Be part of a team that drives innovation, shapes future-ready architectures, and elevates user experiences through advanced microservices and cloud technologies. Your main responsibilities: Develop and maintain robust microservices using Java 8-25, ensuring high-quality code and optimal performance. Collaborate with cross-functional teams including Frontend Developers and Test Engineers within an Agile Nexus SCRUM framework. Conduct code reviews, contribute to architectural decisions, and mentor junior team members. Design, implement, and optimize RESTful architecture, utilizing tools like Kubernetes, Docker, and SOA principles. Support CI/CD pipelines and manage version control with Git, Jenkins, and related tools. Write comprehensive technical documentation in Confluence and contribute to knowledge sharing. Participate in technical consultations, problem-solving, and continuous improvement initiatives. Ensure application security following OWASP standards and best practices. You're ideal for this role if you have: At least 4 years of professional experience in Java development. Strong expertise in Java 8-25, multithreading, immutability, and design patterns. Experience with Spring Boot, Spring MVC, WebFlux, MyBatis, and TestContainers. Solid knowledge of SQL and NoSQL databases such as Oracle, PostgreSQL, MongoDB, Redis, and messaging systems like Kafka. Familiarity with microservices architecture, RESTful APIs, Kubernetes, Docker, and cloud services (AWS). Practical understanding of testing frameworks like JUnit, Mockito, and Spock. Experience with version control, CI/CD tools (Jenkins, GitLab), and scripting in Unix/Linux environments. Good command of the Polish language and communicative English skills. Ability to work independently with strong analytical and problem-solving skills. It is a strong plus if you have: Front-end skills (HTML, CSS, JavaScript, Angular/React/Vue.js). Certifications in AWS or other cloud platforms. Knowledge of DevOps practices and automation tools. Eligibility to work in the European Union: Only candidates with an existing legal right to work in the EU 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.