Senior Java Developer at Endava | Warsaw

Join Netguru, a pioneering force in digital commerce, as we assist renowned brands in modernizing their B2B solutions, marketplaces, and retail ecosystems. Since our inception in 2008, we have empowered businesses through innovative technology, AI-driven personalization, and exceptional engineering and design teams. As a certified B Corporation®, we proudly serve major brands such as IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.We are currently seeking a Senior Backend Engineer with robust architectural expertise to engage in a long-term project for a European client in the laboratory and biotech sector. This position is a single-developer project, requiring close collaboration with the client’s internal teams and laboratory stakeholders to clarify requirements, outline the project scope, and enhance existing backend processes. Strong communication skills are vital, as you will frequently participate in technical discussions with LIMS and laboratory teams. Your role will encompass hands-on development, legacy code refactoring, and contributing to a scalable, well-structured backend architecture. Please note that candidates must be based in the EU due to client stipulations.Position: Senior Backend Engineer (Java / Architecture)Contract: Freelance / B2B – Remote (EU Only)Rate: 36–50 EUR/hourLanguage: English C1Key ResponsibilitiesOperate independently as the sole backend engineer on the project.Refactor and modernize legacy backend systems.Enhance and expand existing microservices and backend integrations.Maintain and develop REST and SOAP interfaces.Engage with laboratory teams and LIMS stakeholders to define requirements.Guarantee stable operation of backend services in an on-premise Kubernetes environment.Work collaboratively with internal client teams to ensure architectural consistency.QualificationsTechnical Skills & ExperienceExtensive experience with Java (Spring / Spring Boot).Strong architectural and problem-solving abilities.Proficient in designing and maintaining REST APIs.Familiarity with SOAP services.Experience in microservices environments.Hands-on experience with Kubernetes (preferably on-premise setups).Background in working with or integrating LIMS systems.Solid understanding of refactoring and modernizing legacy code.Excellent communication skills for direct collaboration with laboratory stakeholders.Proficiency in English at C1 level.Must be based in the European Union.BenefitsIn return, we offer:100% remote, flexible work environment;Access to cutting-edge technology and tools;Opportunities for professional development.

Endava seeks a Senior Java Developer based in Krakow to join teams working on client software projects. This position centers on hands-on Java development and close cooperation with colleagues from various backgrounds. Role overview The Senior Java Developer will build and maintain reliable Java applications. The work involves designing solutions, writing code, and ensuring software meets client needs. Collaboration with cross-functional teams is a core part of the job. What you will do Design, develop, and maintain Java applications Work with teams across disciplines to deliver software that matches client requirements Share technical expertise to help improve project outcomes and efficiency Requirements Solid experience working with Java Ability to collaborate effectively in a team Dedication to delivering high-quality software

Role Overview Endava is looking for a Senior Java Developer in Gdansk. This role focuses on building and refining software solutions for clients. The position involves designing, implementing, and improving complex Java applications. What You Will Do Design and develop Java-based applications Optimize existing systems for better performance and reliability Work closely with colleagues from different disciplines to integrate solutions

Join Netguru, a leader in the digital commerce landscape, as we partner with renowned brands to elevate their B2B solutions, marketplaces, and retail ecosystems. Since our inception in 2008, we have empowered businesses with state-of-the-art technology, AI-driven personalization, and top-notch engineering and design teams. As a certified B Corporation®, we take pride in our collaborations with major brands such as IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.How does freelancing work at Netguru?As a freelancer at Netguru, you have the flexibility to choose your working hours, location, and project tasks. We align your skills with suitable projects, providing you access to diverse opportunities across various industries. This not only enhances your experience but also allows you to broaden your skill set.Moreover, Netguru freelancers can engage in full-time collaborations, truly becoming integral members of our team. Are you ready to make a significant impact? Join us, and let’s create stunning software together.Currently, we are seeking a Senior Frontend Developer to join our team.

Join our dynamic team at Collabera as a Senior Java Developer! We are looking for an innovative and highly skilled individual to contribute to our cutting-edge projects. In this role, you will be responsible for designing, developing, and maintaining high-quality Java applications. You will collaborate closely with cross-functional teams to implement scalable solutions that meet our clients' needs.

Join our dynamic team at Talan as a Senior Java Developer specializing in e-Trading solutions. We are seeking innovative and experienced developers who are passionate about building high-performance trading platforms. You will work closely with cross-functional teams to design, develop, and optimize our trading applications.As a Senior Java Developer, you will leverage your expertise in Java technologies, agile methodologies, and your understanding of financial markets to deliver robust and scalable solutions.

We are seeking a highly skilled Senior Java Developer to join our talented team at altersolutions. In this role, you will be instrumental in designing, developing, and deploying robust Java applications that meet our clients' needs. Your expertise will help drive innovation and efficiency within our projects.The ideal candidate will possess a deep understanding of Java technologies, frameworks, and best practices. You will collaborate with cross-functional teams to deliver high-quality software solutions on time and within budget.

Role overview Endava is looking for a Senior Java Developer based in Krakow. The role centers on designing and building software solutions that support business goals and enhance user experience. Hands-on Java development is a core part of this position, with a focus on creating reliable and maintainable applications. What you will do Take part in the entire software development lifecycle, including requirements gathering, design, coding, deployment, and maintenance Develop and implement applications using Java Work closely with team members to deliver solutions that meet business needs Maintain a strong focus on code quality and application performance throughout each stage of development Growth and team This role provides opportunities to work on complex projects in a collaborative environment, supporting ongoing skill development and teamwork.

Join altersolutions as a Mid/Senior Java Developer and take part in exciting projects that shape the future of technology. In this role, you will leverage your expertise in Java development to create innovative solutions and enhance existing systems. You will collaborate with cross-functional teams to deliver high-quality software in a dynamic, fast-paced environment.

About UsXebia is a leading global technology firm that embarked on its journey in Central and Eastern Europe with two renowned Polish companies: PGS Software, celebrated for its premier cloud and software solutions, and GetInData, a trailblazer in Big Data analytics. Today, we are a formidable team of over 1,000 experts committed to delivering exceptional cloud, data, and software solutions, and we are just beginning our exciting journey.Our MissionWe engage in transformative projects that truly matter. From fintech and e-commerce to aviation, logistics, media, and fashion, we empower our clients to create scalable platforms, data-driven insights, and innovative applications that shape the future of technology. Our esteemed clients include industry leaders such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, and InPost, among others.We prioritize intelligent technology, genuine ownership, and continuous personal and professional growth. Our work with modern, open-source stacks, combined with partnerships with Databricks, dbt, Snowflake, Azure, GCP, and AWS, underscores our commitment to excellence. Fun fact: we were the first AWS Premier Partner in Poland!Community and CultureAt Xebia, our community is what makes us unique. We actively support tech communities, host meetups (including Software Talks and Data Tech Talks), and foster a culture that emphasizes individual growth through Guilds, Labs, and dedicated personal development budgets, covering both technical and soft skills. This is more than just a job; it's a space for growth.Why Choose Us?What sets us apart is our mindset, our vibrant culture, and our exceptional people. While it's challenging to fully capture in words, we invite you to visit us and experience it for yourself.Your Role:Lead the design and delivery of intricate backend features and services, from concept to deployment and ongoing maintenance.Develop high-quality, production-ready software using Java and Spring Boot, adhering to architectural standards.Promote technical excellence by implementing best practices, clean architecture principles, and robust testing strategies.Mentor junior developers and contribute to their growth and skill enhancement.

About the Role Miratech is looking for a Senior Full Stack Developer with strong experience in Java and Angular. This position is based in Bydgoszcz. The team focuses on building scalable applications and delivering software that supports business goals. What You Will Do Write clean, maintainable code for both backend and frontend systems Work closely with cross-functional teams to deliver software solutions Take part in code reviews to ensure quality and consistency Mentor junior developers and support their growth Who We’re Looking For Strong background in Java and Angular Enjoys collaborating with others to solve problems Keeps up with new technology trends Values clean code and software quality

Join our dynamic team as a Java Developer! We are seeking talented individuals with a passion for technology and innovative problem-solving. In this role, you will work on cutting-edge projects, collaborating with a team of skilled professionals to create high-quality software solutions. If you are eager to learn and grow in a fast-paced environment, we want to hear from you!

Role Overview Miratech is looking for a Senior Full Stack Developer with strong Java and Angular experience to join the engineering team in Wrocław. This role focuses on designing and building applications that support digital platforms, working closely with colleagues from different disciplines. What You Will Do Design and develop applications using Java and Angular Collaborate with cross-functional teams to deliver features and improvements Contribute to technical decisions and help shape the direction of projects Work to improve user experiences across digital products Who We’re Looking For Experienced with both Java and Angular Comfortable working in a busy, collaborative setting Interested in modern technologies and development practices

Join our client, a leading international provider of communication and information systems for safety-critical control centers. They specialize in developing and distributing innovative 'Control Centre Solutions' tailored for the Air Traffic Management and Public Safety & Transport sectors.As a Senior Java Developer, you will join a passionate team dedicated to pioneering the next-generation platform designed for safety-critical domains. This advanced platform is engineered to meet the highest quality standards in air traffic management, focusing on reliability, real-time performance, and security as pivotal success factors. The digital platform promotes the seamless integration of voice and data applications, dismantles operational silos, and prioritizes cybersecurity throughout the solution lifecycle.By enhancing control center tasks and enabling integrated operations on a unified screen, our platform empowers organizations to elevate their service levels without the need for additional personnel.

Role overview Miratech is hiring a Senior Full Stack Developer with strong experience in Java and Angular. This role is based in Warsaw. The team builds and maintains web applications that support a range of technology projects. What you will do Design, develop, and maintain web applications using Java and Angular Focus on performance and user experience throughout the development process Work closely with cross-functional teams to deliver solutions that meet project goals Contribute technical expertise to the success of ongoing and new projects Who thrives here Developers who enjoy solving technical challenges and building reliable applications Team members who collaborate well across disciplines People who value a supportive and forward-thinking workplace

Join Netguru, a reputable leader in digital commerce, as we partner with prominent brands to revolutionize B2B solutions, marketplaces, and retail ecosystems. Since our inception in 2008, we have empowered businesses with innovative technology, AI-driven personalization, and exceptional engineering and design expertise. Proudly certified as a B Corporation®, we are trusted by industry giants including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.Freelancing at Netguru:As a Netguru freelancer, you have the unique opportunity to tailor your work environment. You will determine when, where, and how you engage with projects and tasks. Our team ensures that your assignments align with your skills and interests, providing you with diverse opportunities across various industries to enhance your experience and skill set.Moreover, as a Netguru freelancer, you are not just an outsider; you become an integral part of our team with the possibility of full-time collaboration.Are you ready to make a significant impact? Come aboard Netguru, and let’s create exceptional software together.We are currently looking for a skilled Senior Golang Developer.This role is a freelance position on a B2B contract, focusing on the development and scaling of distributed systems and services. The position is 100% remote and requires the selected candidate to be available to start as soon as possible.B2B Contract | Up to 39 EUR/h | Remote | Immediate Start

Join our dynamic team at Alter Solutions as a Senior Java Fullstack Developer, where you will leverage your expertise in Java and full-stack development to create innovative solutions. You will work collaboratively within a talented team, contributing to both frontend and backend development, and enhancing our software architecture.

Role Overview Miratech is looking for a Senior Full Stack Developer with strong experience in Java and Angular to join the team in Kraków. This role focuses on building and improving web applications for clients across various industries. What You Will Do Develop and enhance web applications using Java for the back end and Angular for the front end Work closely with cross-functional teams to deliver solutions that align with client requirements Architect scalable systems and ensure applications provide a smooth user experience What We Look For Advanced skills in both Java and Angular Experience designing and building scalable web applications Ability to collaborate with teams from different disciplines Location This position is based in Kraków.

Role overview Miratech is looking for a Senior Full Stack Developer with strong skills in Java and Angular to join the team in Lublin. This role focuses on designing, building, and maintaining web applications that meet high standards for performance and responsiveness. What you will do Develop and maintain web applications using Java and Angular Work closely with colleagues from different disciplines to define and deliver new features Identify bottlenecks and resolve bugs to improve system stability Help shape the user experience and contribute to system improvements