Senior Full Stack Developer (Java & React; 100% remote)

🏢 Summary: Senior Java Full Stack Engineer role focused on end-to-end development of innovative applications within a global shipping services domain. The position covers full ownership of the development lifecycle, including architecture, DevOps, and XP-based remote pairing. It requires strong expertise in Java, Spring, React, microservices, and cloud-native technologies. 🗂️ Requirements: BS degree in Computer Science or equivalent experience, 5-6+ years of full-stack development experience, 5-6+ years of experience with Java and Spring, Experience with Functional Programming and Java Streams, 2+ years of front-end development with React, Experience with Reactive UI (Reactive JS), 2+ years of TDD/BDD using Junit, Jasmin, Mockito, Protractor or Selenium, 2+ years of experience with microservices architecture (Spring Boot/Cloud), Experience with DevOps practices and Jenkins, Experience designing and deploying cloud or hybrid solutions, Experience with container-based environments (Kubernetes, Cloud Foundry), Familiarity with microservices design concepts (service discovery, circuit breaker), Good English communication skills 📃 Skills: Java, Spring, React, JavaScript, Junit, Jasmin, Mockito, Protractor, Selenium, SpringBoot, SpringCloud, Kotlin, Jenkins, Kubernetes, CloudFoundry, Microservices, TDD, BDD 🏢 Description: We are looking for an experienced Senior Java Full Stack Engineer to join our development team. Responsibilities: - Hands-on full-stack development of innovative applications - Own the entire development cycle, including design, architecture, development, and DevOps - Work in XP with remote pairing Requirements: - BS degree in Computer Science or equivalent combination of education and experience - 5-6+ years of full-stack development experience - 5-6+ years of experience with Java and Spring - Experience with Functional Programming and Java Streams - 2+ years of front-end development with React - Experience developing reactive UI (Reactive JS) - 2+ years of TDD/BDD development with Junit, Jasmin, Mockito, Protractor or Selenium - 2+ years of experience in microservices-based architecture (Spring Boot/Cloud) - Experience in DevOps development and Jenkins - Experience in Kotlin (advantage) - Experience designing, developing, and deploying cloud or hybrid solutions - Experience developing and deploying in container-based environments (Kubernetes, Cloud Foundry) - Familiarity with microservices design concepts: service discovery, circuit breaker - Self-starter with ability to prioritize and plan complex work - Strong critical thinking and problem-solving skills - Good English - verbal and written We offer*: - Flexible working format - remote, office-based or flexible - Competitive salary and compensation package - Personalized career growth - Professional development tools (mentorship program, tech talks, trainings, centers of excellence) - Active tech communities with knowledge sharing - Education reimbursement - Anniversary presents - Corporate events and team buildings - Other location-specific benefits *not applicable for freelancers

🏢 Summary: Senior Full-Stack Developer role focused on developing and enhancing a modern web application in a full-stack environment. The position involves implementing functional requirements, contributing to software architecture, and ensuring high code quality within an agile team. Remote B2B contract on an international project. 🗂️ Requirements: Several years of experience in Java development, Experience with SpringBoot or JakartaEE or MicroProfile, Experience with modern frontend frameworks, Strong knowledge of frontend and backend web development, Understanding of software architecture principles, Knowledge of clean code principles, Experience working in Scrum or Kanban environments 📃 Skills: Java, SpringBoot, JakartaEE, MicroProfile, Vue, React, Angular, Web, Frontend, Backend, Architecture, CleanCode, Scrum, Kanban 🏢 Description: Summary The role of a Senior Full-Stack Developer is essential for enhancing the functionality of a modern web application, contributing to both frontend and backend development to meet user requirements effectively. What we offer: Remote Role B2B Contract Big International project Rate: 42-45 euro/hour +VAT Main Responsibilities: Development and further enhancement of a modern web application in a full-stack environment. Implementation of functional requirements (user stories) within an agile team. Contribution to the design and further development of the software architecture. Ensuring code quality and maintainability. Close collaboration with other developers and business stakeholders. Key Requirements: Several years of professional experience in software development with Java (e.g. Spring Boot or Jakarta EE / MicroProfile). Experience with modern frontend frameworks (e.g. Vue.js, React, or Angular). Solid knowledge of web application development (frontend & backend). Understanding of software architecture and clean code principles. Experience working in agile teams (e.g. Scrum or Kanban). Self-driven and structured working style, as well as strong teamwork skills.

🏢 Summary: Senior Full-Stack Developer role focused on enhancing and developing a modern web application across frontend and backend. The position involves implementing user stories, contributing to software architecture, and ensuring high code quality within an agile team. Remote B2B contract on an international project. 🗂️ Requirements: Several years of experience in Java development, Experience with Spring Boot or Jakarta EE or MicroProfile, Experience with modern frontend frameworks (Vue.js or React or Angular), Strong knowledge of frontend and backend web application development, Understanding of software architecture principles, Knowledge of clean code practices, Experience working in Scrum or Kanban environments 📃 Skills: Java, Spring, SpringBoot, JakartaEE, MicroProfile, Vue, React, Angular, HTML, CSS, JavaScript, Scrum, Kanban 🏢 Description: Summary: The role of a Senior Full-Stack Developer is essential for enhancing the functionality of a modern web application, contributing to both frontend and backend development to meet user requirements effectively. What we offer: Remote Role B2B Contract Big International project Rate: 42-45 euro/hour +VAT Main Responsibilities: Development and further enhancement of a modern web application in a full-stack environment. Implementation of functional requirements (user stories) within an agile team. Contribution to the design and further development of the software architecture. Ensuring code quality and maintainability. Close collaboration with other developers and business stakeholders. Key Requirements: Several years of professional experience in software development with Java (e.g. Spring Boot or Jakarta EE / MicroProfile). Experience with modern frontend frameworks (e.g. Vue.js, React, or Angular). Solid knowledge of web application development (frontend & backend). Understanding of software architecture and clean code principles. Experience working in agile teams (e.g. Scrum or Kanban). Self-driven and structured working style, as well as strong teamwork skills.

🏢 Summary: Senior Java Full Stack Engineer role focused on end-to-end development of innovative applications in an XP environment. The position covers design, architecture, development, and DevOps with strong emphasis on microservices and cloud-based deployments. Work involves building reactive UIs and scalable backend services using modern Java and front-end technologies. 🗂️ Requirements: BS degree in Computer Science or equivalent experience, 5+ years full stack development experience, 5+ years Java and Spring development experience, 2+ years React or modern JavaScript framework experience, Experience with functional programming and Java Streams, 2+ years TDD/BDD experience with JUnit, Jasmine, Mockito, Protractor or Selenium, 2+ years experience with microservices architecture and Spring Boot or Spring Cloud, Experience with Jenkins and DevOps practices, Experience designing and deploying cloud or hybrid solutions, Experience with container platforms such as Kubernetes or Cloud Foundry, Knowledge of microservices design patterns including service discovery and circuit breaker 📃 Skills: Java, Spring, SpringBoot, SpringCloud, React, Kotlin, JUnit, Jasmine, Mockito, Protractor, Selenium, Kubernetes, CloudFoundry, Jenkins, Microservices, DevOps, TDD, BDD, JavaStreams, FunctionalProgramming, Cloud, XP 🏢 Description: #4992 Our client is a global integrated Shipping Services company, recognized for its independent and innovative approach. As a niche carrier, they operate select trades where they provide superior service, ensuring stability, reliability, and flexibility for their customers worldwide. By maintaining strategic partnerships with major carriers and offering alternative line structures, they stand out in a market dominated by alliances. We are seeking a Senior Java Full Stack Engineer to join our dynamic development team. This is a hands-on role involving the full development cycle- from design and architecture to development and deployment- with a focus on innovative applications. You will work in an XP environment, collaborating remotely with pairing practices to deliver high-quality solutions. Responsibilities : Full stack development of innovative applications using Java, Spring, and React. Own the entire development lifecycle, including design, architecture, development, and DevOps. Work in an XP environment with remote pairing. Develop reactive UIs and modern front-end experiences. Implement and maintain microservices-based architectures. Contribute to TDD/BDD development using frameworks such as JUnit, Jasmine, Mockito, Protractor/Selenium. Deploy and manage cloud/hybrid solutions and containerized applications (Kubernetes, Cloud Foundry). Apply design principles like service discovery, circuit breakers, and scalable microservices. Switch effectively between different technologies and tasks in a fast-paced environment. Requirements : BS degree in Computer Science or equivalent experience. 5–6+ years of full stack development experience. 5–6+ years of Java and Spring development; experience with Kotlin is an advantage. 2+ years of front-end development with React (or other modern JS frameworks). Experience with functional programming and Java Streams. 2+ years of experience in TDD/BDD using JUnit, Jasmine, Mockito, Protractor/Selenium. 2+ years of experience with microservices, Spring Boot/Cloud, and DevOps practices including Jenkins. Experience designing, developing, and deploying cloud/hybrid-based solutions. Experience with container-based environments (Kubernetes, Cloud Foundry). Familiarity with modern design patterns and architecture principles: microservices, service discovery, circuit breaker. Strong problem-solving skills, critical thinking, and ability to assess a broad range of information solutions. Excellent English communication skills (verbal and written). Nice-to-Have: Experience in Kotlin development. Experience in developing reactive UIs (Reactive JS).

🏢 Summary: Senior Java Full-Stack Developer role for international projects, focused on end-to-end development of web applications in a cloud-based environment. The position involves backend and frontend development, design and testing activities, and collaboration within agile teams. It is a fully remote B2B contract with long-term cooperation. 🗂️ Requirements: Bachelor’s degree in Engineering, IT, Science, or related technical field, Minimum 5 years of commercial experience in corporate IT, Strong experience with Java and Java frameworks, Commercial experience with frontend technologies, Solid knowledge of JavaScript, HTML5, CSS3, Experience with Angular, Knowledge of databases and SQL, Experience with REST and SOAP web services, Experience with AWS or Azure, Knowledge of Clean Code principles, Experience with unit testing, Experience with source code management, Experience with CI/CD and automated deployments, Very good English (spoken and written), Experience in agile (Scrum) environments 📃 Skills: Java, Spring, JavaScript, HTML5, CSS3, Angular, SQL, REST, SOAP, AWS, Azure, CI/CD, Git, Scrum 🏢 Description: Senior Java Full-Stack Developer – Remote Contract type: B2B Hourly rate: 160–170 PLN/h Location: Remote We are looking for an experienced Senior Java Full-Stack Developer to join international implementation projects. The role involves end-to-end development of web applications, close collaboration with agile teams, and active participation in design and testing activities. The position is well suited for a developer who values clean code, quality, and teamwork in a cloud-based environment. Responsibilities Work as a Senior Java Full-Stack Developer across multiple implementation streams Develop and maintain web-based applications using Java and modern frontend technologies Write and maintain unit tests to ensure software quality Collaborate with agile team members to achieve project and client goals Participate in design reviews, testing activities, and technical discussions Requirements Bachelor’s degree in Engineering, IT, Science, or another technical field Minimum 5 years of commercial experience in a corporate IT environment Strong experience with Java and commonly used Java frameworks Commercial experience with frontend technologies and web-based applications Solid knowledge of JavaScript, HTML5, CSS3, and responsive single-page application design Experience with Angular Knowledge of databases and SQL Experience with web services and APIs (REST, SOAP) Experience deploying applications on cloud platforms such as AWS or Azure Knowledge of Clean Code principles and unit testing Experience with source code management, CI/CD, and automated deployments Very good English, both spoken and written Experience working in international and agile (Scrum) environments Strong communication and collaboration skills Nice to have Experience with Kafka or RabbitMQ Hands-on experience with microservices architecture Knowledge of Docker and Kubernetes Relevant certifications (Java, Spring, SQL, AWS, Azure) Knowledge of German or another European language Benefits Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance We offer Fully remote cooperation Competitive hourly rate: 160–170 PLN/h (B2B) Long-term cooperation in international projects Modern technology stack and agile working environment

🏢 Summary: Fullstack Developer role in a long-term, fully remote project focused on building and maintaining a global digital product supporting retail and service operations. The position covers end-to-end product ownership, including development of micro frontends and microservices, cloud deployment, and production support. It offers hands-on work in a modern, scalable, event-driven architecture. 🗂️ Requirements: Strong backend development experience with Java or Kotlin, Solid frontend development experience with React or similar framework, Experience working in AWS cloud environments, Practical experience with microservices architecture, Experience with CI/CD pipelines, Ability to work in trunk-based development setup, Experience with event-driven systems such as Kafka, Familiarity with AI-assisted and agentic development workflows 📃 Skills: Java, Kotlin, React, AWS, Kubernetes, Kafka, GitLab, CI/CD, Microservices 🏢 Description: PROJECT DETAILS: Workload: Full-time Contract: B2B Start : ASAP Model: 100% remote Business Travels: Occasionally BYOD - bring your own device Security check is required as part of the process Initial 6-month contract , with a project planned for at least 3 years Join our project and help build a global digital product used by retailers and service advisors around the world. We are looking for an experienced Fullstack Developer to join the team with a product that supports resale operations and service processes by delivering accurate, optimised information to employees across the dealer network. This is a great opportunity for someone who enjoys working across the full application lifecycle, from development to production , and wants to have a real impact on a modern, business-critical solution. About the role You will be part of a team that owns the product end-to-end — from building new functionality to deploying and maintaining it in production. This is a hands-on engineering role where you will work closely with other developers, contribute to a shared codebase, and help ensure the product remains stable, scalable, and high-quality. You will play an active role in shaping and improving the system. What you will work on Developing and maintaining micro frontends and microservices Improving system performance, stability, and scalability Integrating the platform with internal and external services Continuously improving code quality and development practices Contributing throughout the full lifecycle of the application, including production deployment What we are looking for Strong experience in backend development using Java/Kotlin Solid understanding of frontend development with React or a similar framework Experience working in cloud environments , preferably AWS Practical experience with microservices architecture Experience with CI/CD pipelines and modern software development practices Ability to work in a trunk-based development setup Experience working with event-driven systems , such as Kafka Strong familiarity with AI-assisted and agentic workflows as part of everyday software development Tech stack Frontend: React, micro frontends Backend: Kotlin & Java, microservices Infrastructure: AWS, Kubernetes CI/CD: GitLab Pipelines Messaging: Kafka

🏢 Summary: Senior Fullstack Developer (Java) role focused mainly on backend development for a logistics platform providing operational monitoring, schedule transparency, and analytical insights. The position involves designing, developing, and maintaining Java EE applications, including modernization and cloud migration initiatives. Work is primarily remote with occasional on-site visits. 🗂️ Requirements: Minimum 5 years of experience as Fullstack Developer, Strong proficiency in Java, Experience with JSF, JPA, EJB, CDI, JAXRS, Hands-on experience in JEE web application development, Basic knowledge of SQL, Basic knowledge of UNIX, Experience with Maven, Experience with Git, Ability to manage and maintain Payara Server, Experience with requirements analysis and UML modeling, Fluent English (written and spoken) 📃 Skills: Java, JEE, JSF, JPA, EJB, CDI, JAXRS, SQL, UNIX, Maven, Git, Payara, OpenAPI, DB2, Neptune, OpenSearch, PrimeFaces, GitLab, Jenkins, JFrog, AWS, UML 🏢 Description: About the Project For our Client - a global logistics company we are looking for a Senior Fullstack Developer (Java) who will be working with a platform that integrates several sources for giving transparent view for coastals schedule to internal operational stakeholders. Team also provides the tools for the operational monitoring, past performance analysis and recovery measures. Additional insights provided by the platform are based on statistical & analytical approaches (e.g. move prediction, avg. port time, etc.) The role is approx. 75% BE tasks and 25% FE tasks. Tech: Java EE, JDK 8, Payara Server 5, OpenAPI, IBM DB2, Neptune graph DB from AWS, OpenSearch, UI: JSF + Primefaces, GitLab, Jenkins, JFrog Work Mode: remote (with occasional trips to Gdańsk) Job Responsibilities Design and implement full-stack applications (front- and backend) using Java (JEE) Write, test, debug, and document code, solutions, and applications Collaborate with your team to handle the entire software development life cycle: from analysis and design to testing, deployment, maintenance, operations, and 3rd-level support Work closely with internal stakeholders and external partners to analyze existing applications, solutions, business processes, and requirements Modernize and expand current applications by migrating from on-premises infrastructure to a cutting-edge cloud platform Manage and maintain existing on-premises infrastructure, including Payara Application Servers and standalone Java applications Expectations Min. 5 years of experience as Fullstack Developer Strong proficiency in Java, with knowledge of JSF, JPA, EJB, CDI, and JAX-RS Hands-on experience in JEE full-stack web application development Basic knowledge of SQL, UNIX, Maven, and Git Familiarity with requirements gathering, documentation, and the use of software design/modeling tools (e.g., UML) Solid understanding of software development processes, with flexibility and strong customer orientation Excellent command of English , both written and spoken, combined with strong communication skills Nice to have: Experience with agile development methodologies (e.g., Scrum); Knowledge of AWS cloud services (OpenSearch, EC2, Neptune, ECS); Work experience or familiarity with the international logistics industry; DevOps experience We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres) Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Long-term B2B contract for a Senior Java Developer to design and implement complex Java-based solutions in large-scale enterprise or public sector projects. The role involves technical leadership, mentoring, and working in a fully remote model without business travel. The position requires strong backend expertise and experience with modern Java ecosystems and cloud-native tools. 🗂️ Requirements: Minimum 5 years of professional experience in Java, Strong knowledge of Spring Boot, Experience with RESTful APIs, Experience with JUnit and Mockito, Experience with OpenShift, Experience with Helm, Experience with Spring Data or JPA, Minimum 1 year experience with Oracle or PostgreSQL, Minimum 2 years experience with Gradle, Experience in large-scale enterprise or public sector projects, Degree in Computer Science or equivalent, German C1, English minimum B1 📃 Skills: Java, Spring, SpringBoot, REST, JUnit, Mockito, OpenShift, Helm, JPA, SpringData, Oracle, PostgreSQL, Gradle, SQL 🏢 Description: Summary: The Senior Java Developer plays a crucial role in designing and implementing complex Java-based solutions, mentoring other team members, and contributing to large-scale projects in either the enterprise or public sectors. Remote work model Contract type : B2B, long-term- 48 months Business travels : No Salary Grids: 160-180 zł/h Main Responsibilities: Design and implement complex Java-based solutions. Mentor junior developers and assist in team knowledge sharing. Manage and contribute to large-scale enterprise or public-sector projects. Key Requirements: Fluent in German (C1) and English (min. B1). Degree in Computer Science or equivalent. Minimum of 5 years of professional experience in Java Strong understanding of Spring Boot, RESTful APIs, testing frameworks (JUnit, Mockito) Experience in OpenShift and Helm charts and ORM frameworks like Spring Data or JPA Knowledge of Oracle or PostgreSQL (min. 1 year). Experience with Gradle for continuous integration (min. 2 years). Experience with large public sector projects or comparable private sector engagements. Nice to Have: Additional years of experience with core technologies beyond the stipulated minimum. Frontend experience with React and TypeScript, and understanding of Ajax (min. 1 year). Experience with complex enterprise application integration.

🏢 Summary: Remote Fullstack Java Developer role for a mission-critical trading platform, focused on building new features and enhancing existing distributed systems. The position involves full lifecycle development, performance optimization, and post-production support in collaboration with a US-based team. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science or related field, 5–10 years of experience as Fullstack Developer, Strong knowledge of Java programming, Strong knowledge of algorithms and data structures, Experience with concurrency and multithreading, Experience with distributed systems, Experience with SQL and relational databases, Experience with NoSQL databases, Experience with high-speed messaging systems, Experience with UNIX or Linux systems 📃 Skills: Java, Nodejs, Angular, SpringBoot, JavaScript, HTML, CSS, JSON, Kafka, Tibco, Tervela, Redis, Cassandra, Oracle, SQL, PLSQL, Tomcat, WebLogic, WebSphere, Unix, Linux, NoSQL, Concurrency, Multithreading, Algorithms, DataStructures 🏢 Description: We are looking for a Fullstack Java Developer to join remotely one of the project for our American client from trading sector. We offer: Salary range: 45-55 USD/h on B2B +VAT without paid vacations depending on the experience, and technical testing 100% Remote job Working hours: Starting from 12:00 or ideally from 2 PM CET to have the overlap with the US team in the Eastern Time zone (especially during the onboarding process) Description of the Position: Perform software development and programming to create new features and enhance functionality on a mission critical platform. Adapt and extend existing re-usable components and libraries. Develop high quality software while meeting deadlines. Assist with rollout and post production support. Present ideas for system improvements. Design or upgrade existing software to ensure product performance and quality expectations are met. Job Responsibilities: ·       Creating new features and enhancing functionality on a mission critical platform ·       Adapts and extend existing re-usable components and libraries. ·       Develops high quality software while meeting deadlines ·       Presents ideas for system improvements ·       Design or upgrade an existing software to ensure product performance and quality expectations are met · Assists with rollout and post production support Required Qualifications: ·       Master’s or Bachelor's degree in Computer Science or related discipline ·       5-10 years of working experience as a full-stack developer, distributed systems experience is a plus ·       Excellent written and verbal communication skills ·       Strong ability to interpret business requirements ·       Must be a creative problem solver ·       Must demonstrate strong knowledge of algorithms, data structures, concurrency, and java programming Additional Preferred Experience: ·       Java, Nodejs, Angular, Spring Boot, JavaScript, HTML, CSS, JSON ·       Multi-threaded programming ·       Experience with algorithms, data structures, and concurrency ·       Kafka, Tibco Rendezvous, Tervela, or similar high-speed messaging system ·       Experience with distributed database systems like Redis, Cassandra or any other NoSQL database ·       Oracle PL/SQL programming, Proficiency in SQL ·       Tomcat, WebLogic, or WebSphere ·  UNIX / Linux operating systems ·  Experience with financial transaction systems ·  Basic knowledge of the fixed income and financial markets is a plus. ·  Excellent written and verbal communication skills ·  Strong ability to interpret business requirements ·  Must be a creative problem solver and should have good analytical thinking. This role isn't for you, but you have a friend who would be a good fit? Refer them and earn up to 5,000 PLN. Referral Program: Talent from your network

🏢 Summary: Senior Full Stack Engineer role focused on application security within a large-scale enterprise platform. The position involves resolving security findings, performing Java and TypeScript dependency upgrades, and ensuring system stability in a regulated financial environment. Requires hands-on secure coding expertise and collaboration with distributed global teams. 🗂️ Requirements: 7+ years enterprise Java experience, Strong background in application security, Experience in vulnerability investigation and remediation, Experience with Java and TypeScript/JavaScript dependency upgrades, Proficiency in Java SE and JEE, Proficiency in Spring Framework, Experience with JMS, Experience with JPA and Hibernate, Proficiency in TypeScript, Experience with Angular v2+, Experience with Observables and Redux, Experience with OAuth, OIDC, SSO integration, Understanding of enterprise design and integration patterns, Experience in financial or regulated environments, Fluent English, Willingness to undergo background check 📃 Skills: Java, JEE, Spring, JMS, JPA, Hibernate, TypeScript, JavaScript, Angular, Redux, OAuth, OIDC, SSO, IAM, Kafka, Camel, Jenkins, Harness 🏢 Description: Start date: April 2026 Salary ranges: 115-125 PLN net/h Form of employment: B2B contract Location: Remote Language: English (fluent) About the Role: We are seeking an experienced Full Stack Engineer with a strong background in application security , enterprise Java development, and modern front‑end frameworks. In this role, you will focus on resolving security findings across a large-scale platform, performing dependency upgrades (Java + TypeScript), ensuring that remediation work does not impact existing functionality, and collaborating with global distributed teams. This is a senior-level position requiring hands-on expertise in secure coding, investigation of vulnerabilities, and implementation of remediation strategies. Key Responsibilities: Analyze and resolve security findings across the platform Perform dependency upgrades (Java, TypeScript/JavaScript) Ensure stability and functional integrity of systems after security fixes Work collaboratively with distributed global engineering teams Integrate with enterprise IAM systems (OAuth, OIDC, SSO) Contribute to best practices, architecture patterns, and secure development standards Must-Have Qualifications: 7+ years of enterprise Java experience Strong security background, including vulnerability investigation & remediation Experience with dependency upgrades (Java, TS/JS) Proficiency in: Java SE / JEE Spring Framework JMS JPA / Hibernate TypeScript Angular v2+, Observables, Redux Enterprise IAM integration: OAuth, OIDC, SSO Solid understanding of enterprise design & integration patterns Experience working in financial/regulated environments Excellent communication skills and fluent English Nice to Have: Apache Camel Jenkins, Harness.io Kafka We offer: Up to 125 PLN/hour net under a B2B contract, A flexible billing model, A short, 14‑day invoice payment term, A comprehensive private medical care package, Access to the MyBenefit cafeteria platform (including Multisport cards and prepaid cards for IKEA, Zalando, Notino, and many other partners). Additional Information: Background checks is mandatory for this role and will be conducted by a trusted third‑party vendor. This requirement is standard for the financial industry, ensuring compliance with regulatory obligations and maintaining the highest security standards. Once a candidate is shortlisted, the client will request the necessary documents and personal details required to complete the verification process.