Fullstack Engineer (Java & React)

🏢 Summary: Long-term B2B hybrid role focused on hands-on Java and React development within a microservices architecture, contributing directly to production code and system design. The position emphasizes high-frequency delivery, REST API development, and collaboration in a global engineering environment. It combines technical leadership with active development in financial-sector projects. 🗂️ Requirements: Strong experience with Java, Strong experience with ReactJS, Experience with microservices architecture, Experience delivering RESTful APIs, Experience with PostgreSQL, Recent experience with modern Java versions, Ability to deliver code changes frequently, Background in banking or financial sector 📃 Skills: Java, ReactJS, Microservices, REST, PostgreSQL, Docker, Kubernetes 🏢 Description: Working mode: Hybrid - 6 days per month at the Kraków office Contract type: B2B, long term cooperation Rate: 200 PLN/h Summary: This role focuses on hands-on development and system architecture, driving engineering culture, and enhancing business growth through technical expertise in a collaborative, global environment. Main Responsibilities: Deliver code to production and support system architecture aligned to microservices Understand business, engineering, and non-functional requirements Drive the desired engineering culture across teams Collaborate with a globally diverse team across regions Proactively remove impediments, assess risks, and communicate issues to program management Identify and eliminate process inefficiencies Key Requirements: Strong Java and React programming experience Experience in microservice architecture Background in the financial sector, particularly banking Proven capability of delivering code changes at high frequency Experience with RESTful API delivery Familiarity with PostgreSQL databases Recent Java experience, preferably with the latest versions Experience with ReactJS for UI application development Nice to Have: Knowledge of containers and orchestration technologies like Docker and Kubernetes. Other Details: This position offers the opportunity to work within a multi-regional team on innovative projects. Ideal for candidates seeking to leverage their development skills in a dynamic and evolving business context.

🏢 Summary: Long-term B2B opportunity for a senior engineer to deliver production-ready code and shape system architecture in a microservices environment. The role combines hands-on Java and React development with architectural responsibilities in a global, collaborative setup. It focuses on high-frequency delivery and technical excellence within the financial sector. 🗂️ Requirements: Strong Java experience (latest versions), Strong React experience, Experience with microservices architecture, Experience delivering RESTful APIs, Experience with PostgreSQL, Proven high-frequency code delivery, Experience in banking or financial sector 📃 Skills: Java, React, Microservices, REST, PostgreSQL, Banking, Docker, Kubernetes 🏢 Description: Working mode : Hybrid - 6 days per month at the Warsaw office Contract type : B2B, long term cooperation Rate : 200 PLN/h Summary: This role focuses on hands-on development and system architecture, driving engineering culture, and enhancing business growth through technical expertise in a collaborative, global environment. Main Responsibilities: Deliver code to production and support system architecture aligned to microservices Understand business, engineering, and non-functional requirements Drive the desired engineering culture across teams Collaborate with a globally diverse team across regions Proactively remove impediments, assess risks, and communicate issues to program management Identify and eliminate process inefficiencies Key Requirements: Strong Java and React programming experience Experience in microservice architecture Background in the financial sector, particularly banking Proven capability of delivering code changes at high frequency Experience with RESTful API delivery Familiarity with PostgreSQL databases Recent Java experience, preferably with the latest versions Experience with ReactJS for UI application development Nice to Have: Knowledge of containers and orchestration technologies like Docker and Kubernetes. Other Details: This position offers the opportunity to work within a multi-regional team on innovative projects. Ideal for candidates seeking to leverage their development skills in a dynamic and evolving business context.

🏢 Summary: Long-term B2B role focused on hands-on Java and React development within a microservices architecture, contributing directly to production code and system design. The position combines backend and frontend engineering with architectural responsibilities in a global, collaborative environment. The role supports high-frequency delivery in a financial services context. 🗂️ Requirements: Strong experience with Java, Strong experience with ReactJS, Experience with microservices architecture, Experience delivering RESTful APIs, Experience with PostgreSQL, Recent experience with modern Java versions, Experience delivering code changes at high frequency, Background in financial sector, preferably banking 📃 Skills: Java, ReactJS, Microservices, REST, PostgreSQL 🏢 Description: Working mode : Hybrid - 6 days per month at the Kraków office Contract type : B2B, long term cooperation Summary: This role focuses on hands-on development and system architecture, driving engineering culture, and enhancing business growth through technical expertise in a collaborative, global environment. Main Responsibilities: Deliver code to production and support system architecture aligned to microservices Understand business, engineering, and non-functional requirements Drive the desired engineering culture across teams Collaborate with a globally diverse team across regions Proactively remove impediments, assess risks, and communicate issues to program management Identify and eliminate process inefficiencies Key Requirements: Strong Java and React programming experience Experience in microservice architecture Background in the financial sector, particularly banking Proven capability of delivering code changes at high frequency Experience with RESTful API delivery Familiarity with PostgreSQL databases Recent Java experience, preferably with the latest versions Experience with ReactJS for UI application development Nice to Have: Knowledge of containers and orchestration technologies like Docker and Kubernetes.

🏢 Summary: Backend/API engineering role focused on building and maintaining Java-based microservices and RESTful APIs for large-scale digital banking and trading platforms within an Agile/DevOps environment. The position covers full SDLC involvement, including design, development, testing and production support of distributed financial systems. Emphasis is placed on scalability, security and reliability in global teams. 🗂️ Requirements: Experience in Java backend development, Ability to design and develop RESTful APIs, Experience with microservices architecture, Experience with distributed systems, Ability to translate business requirements into technical designs, Experience across full SDLC, Understanding of scalability, security and reliability principles 📃 Skills: Java, REST, Microservices, APIs, SDLC, DevOps, Agile 🏢 Description: Overview Location: Kraków (2 days a week in office) Domain: Digital banking, payments, APIs, trading platforms Environment: Agile + DevOps, global teams Focus: Backend / API development for large-scale financial systems Core Responsibilities Engineering & Delivery Design, develop and maintain Java-based backend services Build and evolve RESTful APIs and microservices for digital banking platforms Translate business requirements into technical designs and implementations Contribute across the full SDLC: Requirements analysis Design Coding Testing Production support Architecture & Systems Work on distributed systems / microservices architecture Design for: Scalability Security Reliability

🏢 Summary: Contract role in banking focused on modernizing a legacy corporate banking system into a new digital platform. The position involves developing new features, building and maintaining APIs, and working within a SAFe Agile team to improve customer experience and operational efficiency. Hybrid work model with competitive B2B rate. 🗂️ Requirements: Minimum 6 years of hands-on Java development experience, Experience in building API solutions, Experience with reactive programming, Working knowledge of Spring framework, Working knowledge of Hibernate, Working knowledge of Cucumber, Proficiency in SQL, Experience with REST services, Experience with Microservices architecture, Proficiency with Git, Understanding of SOLID principles, Knowledge of design patterns, Experience working in SAFe Agile environment 📃 Skills: Java, Spring, Hibernate, Cucumber, SQL, REST, Microservices, Git, SOLID, DesignPatterns, SAFe, Reactive 🏢 Description: Industry: Banking Rate: up to 160 pln/h on b2b Location: Hybrid form Warsaw, Gdańsk or Gdynia (3 days per week from office) Summary: The main purpose of this role is to be part of a team responsible for the modernization of banking software, specifically transitioning from a legacy system to a new digital platform for corporate clients. This initiative aims to enhance customer service and improve operational efficiency. Responsibilities: Develop new features and improvements for the corporate banking platform. Collaborate with developers, product owners, architects, analysts, and QA teams. Build and maintain APIs for enhanced customer experience. Ensure compliance with banking services and maintenance requirements. Participate in agile ceremonies and follow SAFE Agile principles. Key Requirements: Minimum 6 years of hands-on experience in Java development. Experience in building API solutions. Familiarity with reactive programming methodologies. Working knowledge of Spring, Hibernate, and Cucumber framework. Proficiency with SQL, REST, Microservices, and GIT. Understanding of SOLID principles and design patterns. Fluency in English. Nice to Have: 2 years experience with Angular. Ability to conduct unit tests using Jasmine.

🏢 Summary: The role involves modernizing corporate banking software by migrating from a legacy system to a new digital platform. The position focuses on developing new features, building and maintaining APIs, and ensuring compliance within a banking environment. The work is delivered in a hybrid model within an agile team following SAFe principles. 🗂️ Requirements: Minimum 6 years of commercial experience in Java development, Experience in building and maintaining APIs, Experience with reactive programming, Working knowledge of Spring, Working knowledge of Hibernate, Working knowledge of Cucumber, Proficiency in SQL, Proficiency in REST, Experience with Microservices architecture, Proficiency in GIT, Understanding of SOLID principles, Knowledge of design patterns, Fluency in English 📃 Skills: Java, Spring, Hibernate, Cucumber, SQL, REST, Microservices, GIT, Reactive, SOLID, Angular, Jasmine 🏢 Description: Industry: Banking Rate: up to 160 pln/h on b2b Location: Hybrid form Warsaw, Gdańsk or Gdynia (3 days per week from office) Summary: The main purpose of this role is to be part of a team responsible for the modernization of banking software, specifically transitioning from a legacy system to a new digital platform for corporate clients. This initiative aims to enhance customer service and improve operational efficiency. Responsibilities: Develop new features and improvements for the corporate banking platform. Collaborate with developers, product owners, architects, analysts, and QA teams. Build and maintain APIs for enhanced customer experience. Ensure compliance with banking services and maintenance requirements. Participate in agile ceremonies and follow SAFE Agile principles. Key Requirements: Minimum 6 years of hands-on experience in Java development. Experience in building API solutions. Familiarity with reactive programming methodologies. Working knowledge of Spring, Hibernate, and Cucumber framework. Proficiency with SQL, REST, Microservices, and GIT. Understanding of SOLID principles and design patterns. Fluency in English. Nice to Have: 2 years experience with Angular. Ability to conduct unit tests using Jasmine.

🏢 Summary: Full-time B2B role supporting a Global Disbursements platform in the banking sector, focused on enabling efficient fund transfers through high-quality analysis and DevOps-aligned project coordination. The position involves resolving development blockers, supporting releases, and ensuring quality gates within a distributed, containerized environment. Hybrid work model with long-term contract and English-speaking project environment. 🗂️ Requirements: Experience with Kubernetes, Docker, Kafka, Istio, Experience with Bash/Shell scripting, Proficiency in Java, Strong knowledge of Unix/Linux systems, Experience with Jenkins and GitHub, Experience designing and maintaining distributed containerized platforms, Experience building and maintaining CI/CD pipelines, Ability to create technical and release documentation, Professional proficiency in English 📃 Skills: Kubernetes, Docker, Kafka, Istio, Bash, Java, Unix, Linux, Jenkins, GitHub, CICD, DevOps, Containers 🏢 Description: 🌍 Work mode : ·       hybrid model people form Cracow or Warsaw - 8x per month · outside of Cracow - 6 x per month ⏰ Start : ASAP/30 days weeks. 📑 Contract : B2B ⏳ Duration : >12 months contracts + extensions 📕 Project language : English. ⚙️ Industry : Banking. 💻 Workload : Full time Summary: This role focuses on supporting the Global Disbursements platform, enabling efficient fund transfers by delivering high-quality analysis and facilitating effective project management in alignment with DevOps practices. Main Responsibilities: Resolve blockers for the developers. Maintain communication channels with technical architects and the management team to provide updates on progress and blockers. Collaborate with Test QAs to ensure all quality gates are met for deliverables. Create and maintain production support walkthrough documentation. Develop release checklist documentation. Key Requirements: Cloud Native Technologies: Kubernetes, Docker, Kafka, Istio Service Mesh. Traditional Technologies: Bash/Shell, Java , Unix/Linux, Jenkins, GitHub. Experience in designing, building, and maintaining distributed containerized platforms. Expertise in delivering CI/CD pipelines for automated deployments. Strong analytical and communication skills. Good proficiency in English, including writing, reading, and speaking. Nice to Have: Experience with Agile methodologies. Familiarity with project management tools.

🏢 Summary: Hybrid Backend/Frontend Developer role in a global payment platform focused mainly on backend development (80%) with microservices architecture. The position involves building and maintaining RESTful services, migrating systems to microservices, and enhancing test automation in a DevOps environment. You will work with modern technologies to develop and optimize payment processing solutions. 🗂️ Requirements: Minimum 4 years of backend development experience, Very good knowledge of Java 11+, Experience with Kubernetes, Experience with Git, Very good knowledge of SQL, Experience with Oracle databases, Experience with RESTful microservices/APIs, Knowledge of Unix/Linux and CLI 📃 Skills: Java, Kubernetes, Git, SQL, Oracle, REST, Microservices, Unix, Linux, CLI 🏢 Description: O projekcie Dołączysz do zespołu rozwijającego globalną platformę płatniczą, obsługującą transfery środków, płatności dla dostawców, wynagrodzenia i podatki. System działa w produkcji od kilku lat i rozwijany jest długofalowo – większość czasu poświęcamy na rozwój nowych funkcjonalności, część na utrzymanie i optymalizację istniejących procesów. Pracujemy w duchu Agile i DevOps , w zespole rozproszonym regionalnie, w którym panuje bardzo dobra atmosfera współpracy. Projekt bazuje na nowoczesnym stacku technologicznym: Java 17/21, Spring Boot, REST APIs, SQL/Oracle, Kubernetes, JavaScript, React 18+ . W tej roli będziesz łączyć backend (80%) i frontend (20%) , dzięki czemu masz wpływ na całość działania systemu. Lokalizacja: praca hybrydowa – min. 2 razy w tygodniu z biura w Krakowie Twoje zadania Rozwój i wsparcie usług backendowych i frontendowych Budowa mikrousług i integracji API Migracja systemów do architektury microservices Zwiększanie automatyzacji testów i optymalizacja STP Utrzymanie standardów technologicznych i wsparcie rozwoju produktów Wymagania Min. 4 lata doświadczenia w programowaniu backend Bardzo dobra znajomość Java 11+ Kubernetes i Git Bardzo dobra znajomość SQL i technologii bazodanowych (Oracle preferowane) Doświadczenie w pracy z RESTful microservices / APIs Znajomość Unix/Linux i pracy w CLI Znajomość języka angielskiego na poziomie minimum B2 Komunikatywność i podejście problem solving Mile widziane Java 17+ JavaScript / React Doświadczenie w pracy w DevOps delivery team Znajomość Spring / Spring Boot Umiejętność pracy z monitoringiem aplikacji Doświadczenie w migracjach z mainframe / WebSphere Dlaczego warto Praca nad globalnymi usługami płatniczymi Realny wpływ na modernizację architektury i migrację systemów Łączenie backendu i frontendu w jednej roli Nowoczesne środowisko DevOps Udział w automatyzacji testów i zwiększaniu efektywności STP Hybrydowy tryb pracy (częściowo w biurze, częściowo zdalnie)

🏢 Summary: Fullstack Developer role focused on building and evolving Java-based microservices and modern Angular Single Page Applications within an event-driven architecture. The position emphasizes backend development with Spring Boot, Kafka integration, and secure, scalable solutions, while contributing to CI/CD pipelines and frontend best practices. Work involves close collaboration on solution design, security implementation, and continuous improvement in an Agile environment. 🗂️ Requirements: Strong hands-on experience with Java 17–21, Strong experience with Spring Boot 3.x, Experience with microservices architecture, Experience with Kafka in event-driven or messaging systems, Strong practical experience with SQL and Oracle, Experience or strong understanding of Redis, Experience with Domain Driven Design, Experience with Node.js, Experience with TypeScript, Experience building Single Page Applications with Angular, Strong knowledge of Angular architecture and best practices, Strong understanding of web application security, Practical knowledge of OIDC and OAuth2, Experience with Git, Experience working in Agile methodologies 📃 Skills: Java, Spring, SpringBoot, Microservices, Kafka, SQL, Oracle, Redis, DDD, Node.js, TypeScript, Angular, SPA, Security, OIDC, OAuth2, Git, Agile 🏢 Description: Location: Hybrid work model – 2-3 days per week from the Warsaw office Salary: 160 – 170 PLN net/h (B2B via Experis) Tasks: •    Design, develop, and maintain fullstack applications with a strong emphasis on backend and modern frontend architectures •    Build high-quality, maintainable, secure, scalable, and testable software aligned with business requirements •    Develop and evolve Java-based microservices using Spring Boot •    Contribute to Single Page Applications development ensuring frontend best practices •    Collaborate with business and technical stakeholders to clarify and refine functional and non-functional requirements •    Participate in solution design pre-project studies and technical decision-making •    Integrate systems using event-driven architectures and streaming platforms •    Optimize and maintain existing codebases •    Implement execute and maintain automated tests and CI/CD pipelines •    Ensure application security including identity management and secure authentication flows •    Maintain and update technical documentation •    Participate in internal and external developer communities to share best practices •    Continuously improve skills in modern technologies and software engineering practices Requirements: Backend & Architecture •    Strong hands-on experience with Java 17–21 focusing on modern Java •    Strong experience with Spring Boot 3.x and microservices architectures •    Required experience with Kafka in event-driven or messaging-based systems •    Strong practical experience with SQL using Oracle •    Experience or strong understanding of Redis •    Experience with Domain Driven Design Frontend •    Required experience with Node.js •    Required experience with TypeScript •    Solid experience building Single Page Applications using Angular •    Strong knowledge of Angular best practices architecture and maintainability •    Experience with SPA development •    Webpack knowledge is a nice to have Security •    Strong understanding of web application security •    Practical knowledge of OIDC and OAuth2 protocols •    Experience with identity management platforms as a strong advantage •    Awareness of OWASP principles certifications are a plus DevOps & Tooling •    Required experience with Git •    Experience with CI/CD pipelines GitLab CI and Jenkins as a nice to have •    Maven knowledge as a nice to have •    Docker and Kubernetes knowledge as a nice to have •    Experience with IntelliJ and VS Code •    Knowledge of Jira and Confluence •    Python knowledge as a nice to have •    Practice with AI based code generation tools as a nice to have Methodologies & Ways of Working •    Experience working in Agile methodologies such as Scrum and Kanban •    DevOps mindset and practices •    Ability to collaborate in distributed international teams Offer: •    Multisport card •    Private healthcare •    Access to an e‑learning platform •    Group life insurance

🏢 Summary: Frontend role focused on building and enhancing secure API integrations with external brokers using React and TypeScript in a hybrid B2B model. The position involves developing reusable UI components, collaborating with backend teams on financial API integrations, and contributing to code quality in a Scrum environment. 🗂️ Requirements: Experience in frontend development, Proficiency in React, Proficiency in TypeScript, Knowledge of REST APIs, Knowledge of JSON, Ability to work in Scrum teams, Experience with performance standards, Experience with accessibility standards, Collaboration skills, Communication skills 📃 Skills: React, TypeScript, REST, JSON, Scrum, Node.js, CI/CD, Postman 🏢 Description: General info: - Model of work: hybrid, 1x per week work from office in Warsaw - Type of contract: B2B contract - Rate: 130 PLN net + VAT / hour Introduction & Summary: Role requires expertise in frontend development to create and enhance API integrations with external brokers. Ideal candidate should have a strong proficiency in React and TypeScript. You will contribute to building user-friendly and secure interfaces, ensuring smooth integration with partners while adhering to high-quality standards. Main Responsibilities: - Develop reusable, high-quality React + TypeScript components for plugins and internal tools - Work closely with backend engineers to integrate with payment and financial APIs - Ensure performance, accessibility, and responsiveness on partner websites - Contribute to code quality through testing and code reviews - Participate in two-week sprints using Scrum methodology - Collaborate with the Product Owner for requirement clarification - Engage in continuous learning and knowledge sharing within the team Key Requirements: - Proven experience in frontend development - Proficiency in React and TypeScript - Familiarity with REST APIs and JSON - Ability to work in Scrum teams - Experience with performance and accessibility standards - Good collaboration and communication skills Nice to Have: - Knowledge of Node.js - Experience with CI/CD pipelines - Familiarity with tools like Postman - Experience in building embeddable widgets/plugins - Understanding of security and compliance in financial products