Senior Fullstack Developer

🏢 Summary: Fullstack Developer role focused on building and maintaining production-grade backend services in Node.js (NestJS/Express) and frontend applications in React/Next.js with TypeScript. The position involves working with databases and APIs to deliver long-term fintech, e-commerce, and enterprise systems. Onsite work in Warsaw with a strong emphasis on backend expertise and production experience. 🗂️ Requirements: Strong backend skills in Node.js and NestJS, Minimum 5 years of experience in backend development, Minimum 2 years of experience maintaining production applications, Solid frontend skills in React and TypeScript, Experience with database integration, Experience with API integration, Experience mentoring mid or junior developers, Ability to work 100% onsite in Warsaw 📃 Skills: Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MongoDB, APIs, Microservices, Cloud 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House We build modern, scalable applications with fintech-grade reliability and strong backend architecture. Our projects focus on high-performance web platforms and integrations using Java Spring and Node.js ecosystems. Your Role As a Fullstack Developer, you’ll primarily work with Node.js on the backend, React on the frontend, sometimes also with Next.js Responsibilities Develop backend services with Node.js (NestJS/Express) * Build frontend apps with React/Next.js + TypeScript * Work with databases (PostgreSQL, MongoDB) and APIs Collaborate with design and backend teams Requirements Strong backend skills in Node.js/NestJS At least 5 years of experience in backend applications At least 2 years of experience in maintaining production applications Solid frontend skills in React + TypeScript Database and API integration knowledge Experience mentoring mid/junior developers Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Nice-to-have Microservices and cloud deployment experience Rates (B2B/Freelance) Senior: 120 - 180 PLN/h Recruitment Process 1. Intro Call (30 min) – Quick chat about your experience, expectations, and our projects. 2. Technical Interview / Task – Backend (Node.js) and frontend (React) focus. 3. Final Meeting – Culture/fit + project discussion. 4. Offer – Fast decision if it’s a match. 5. Process usually takes 2–3 weeks . 6. Feedback after each stage within a few days

🏢 Summary: Short-term B2B contract for a Fullstack Developer (Node.js + TypeScript) to build and maintain backend services for a regulated digital capital market platform in the fintech domain. The role focuses on developing scalable APIs, integrating KYC/AML providers, and implementing authentication, authorization, and investor management features. The project emphasizes code quality, security, and collaboration with cross-functional teams. 🗂️ Requirements: 3+ years commercial experience with Node.js, Strong knowledge of TypeScript, Experience building REST APIs, Experience with NestJS or similar framework, Experience with Prisma ORM or similar ORM, Understanding of authentication and authorization, Experience with relational databases, Experience writing automated tests, Knowledge of clean code principles, English for daily communication 📃 Skills: Node.js, TypeScript, NestJS, Prisma, REST, SQL, Jest, Supertest, Authentication, Authorization 🏢 Description: Description We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting-edge solutions and services that keep them at the forefront of innovation. FULLSTACK DEVELOPER B2B: 80-100 PLN / hour START - 1 JULY TERM - 6 WEEKS LOCATION: POLAND (REMOTE) *We offer a hybrid work model, allowing you to balance office presence with remote work. However, it's important to note that the role emphasizes a stronger presence in the office to foster teamwork and effective communication. Requirements Key Duties and Services: A Roadmap to Your Professional Success Your Mission : We are looking for a Fullstack Developer (Node. js + TypeScript) to join a fintech project focused on building a regulated digital capital market platform. The system supports investor onboarding, KYC/AML verification, investor classification, access control, audit logging, and digital wallet infrastructure. You will work closely with senior engineers and architects to build scalable backend services and integrations with fintech and blockchain-related providers. Scope of services: Developing and maintaining backend services using Node. js + TypeScript Building and extending REST APIs for onboarding, authentication, and user management Integrating external KYC/AML and identity verification providers Implementing business logic for investor classification and access control Creating and maintaining database models using Prisma ORM Writing unit and integration tests (Jest, Supertest) Participating in code reviews and technical discussions Collaborating with frontend, mobile, QA, and product teams Supporting code quality, security, and system reliability Here’s the set we are required: 3+ years of commercial experience with Node. js backend development Strong knowledge of TypeScript Experience building REST APIs and backend systems Experience with NestJS or similar frameworks Experience with Prisma ORM or similar Understanding of authentication & authorization concepts Familiarity with relational databases Experience writing automated tests (Jest, Supertest or similar) Strong understanding of clean code principles and best practices Good communication skills and English for daily cooperation Nice to have: Experience with class-validator / DTO-based validation Familiarity with GraphQL (Apollo) Experience in fintech / banking / regulated environments Knowledge of KYC/AML processes Exposure to blockchain, wallets, or digital assets Career Advancement at Your Fingertips: Explore Opportunities with Us By joining us you will get: Work on a modern fintech platform with real regulatory requirements Collaboration with experienced senior engineers and architects Opportunity to work with KYC/AML, identity systems, and fintech integrations Influence on system design and backend architecture decision A strong engineering culture focused on quality, security, and scalability Navigating the Hiring Process: What does the recruitment process for that position look like? HR Screening with Talent Acquisition Specialist (30 min) Technical Interview (60 min) Interview with Delivery Manager (30 min) Job Offer

🏢 Summary: Hybrid Fullstack Developer role focused on building and maintaining scalable web applications using Java and React.js. The position involves designing backend services and RESTful APIs, developing modern frontend interfaces, and contributing to CI/CD and DevOps practices. Work includes testing, performance optimization, and collaboration on architecture and microservices. 🗂️ Requirements: Strong experience with Java and Spring Boot, Solid experience with React.js and state management, Experience designing and consuming RESTful APIs, Experience with microservices architecture, Proficiency in JavaScript, HTML5, CSS3, Experience with relational or NoSQL databases, Knowledge of unit and integration testing practices, Experience with CI/CD pipelines, Familiarity with Git and version control workflows, Ability to work with Agile/Scrum methodologies 📃 Skills: Java, Spring, SpringBoot, React, Redux, JavaScript, HTML5, CSS3, Webpack, Babel, ESLint, JUnit, Mockito, Jest, MySQL, PostgreSQL, NoSQL, Git, CI/CD, Docker, Kubernetes, AWS, Azure, GCP, Kafka, GraphQL, WebSocket 🏢 Description: We are looking for a highly skilled Fullstack Developer with expertise in Java and React.js to join our Kraków-based development team. You will design, develop, and maintain scalable, high-performance web applications, contributing to both backend services and rich frontend interfaces. This role follows a hybrid working model , with 2–3 days per week onsite in Kraków. Key Responsibilities Backend Development: Architect, implement, and maintain backend services using Java , Spring Boot , and related frameworks Frontend Development: Build responsive, modular, and maintainable React.js applications with a focus on component-driven design Design and implement RESTful APIs and microservices , ensuring high performance, security, and scalability Collaborate with cross-functional teams to define technical requirements , system architecture, and feature implementation Apply unit testing, integration testing, and end-to-end testing best practices (JUnit, Mockito, Jest, React Testing Library) Participate in code reviews , enforce coding standards, and promote best practices in clean code, SOLID principles, and design patterns Troubleshoot and optimize application performance and resolve production issues Manage CI/CD pipelines , automate deployments, and support DevOps practices Stay up-to-date with emerging technologies and frameworks to continuously improve application architecture Required Skills and Experience Strong experience with Java , Spring Boot , and related backend frameworks Solid experience with React.js , Redux , or state management libraries Proven experience in designing and consuming RESTful APIs and microservices architecture Proficient in JavaScript, HTML5, CSS3, and modern frontend tooling (Webpack, Babel, ESLint) Experience with relational databases (MySQL, PostgreSQL) and/or NoSQL databases Familiarity with Git , version control workflows, and Agile/Scrum methodologies Understanding of unit testing, integration testing, and test-driven development (TDD) Good problem-solving and communication skills in English Nice to Have Experience with TypeScript and advanced React patterns (Hooks, Context API, Suspense) Knowledge of Docker , Kubernetes , or cloud platforms (AWS, Azure, GCP) Experience with event-driven architectures , message queues , or Kafka Familiarity with GraphQL or WebSocket-based real-time applications

🏢 Summary: Onsite Fullstack Developer role focused on building scalable, production-ready web applications using Java Spring and Node.js on the backend and React on the frontend. The position involves developing REST APIs, integrations, and high-performance systems with relational databases, contributing to architecture and technical decisions. Work is 100% onsite in Warsaw under a B2B contract. 🗂️ Requirements: Ability to work 100% onsite in Warsaw, Commercial experience with Java, Commercial experience with Spring Boot, Commercial experience with Node.js, Experience with React, Experience with TypeScript, Knowledge of PostgreSQL, Knowledge of MySQL, Knowledge of MariaDB, Experience building production applications, Understanding of REST APIs, Understanding of backend architecture, English B2 level or higher 📃 Skills: Java, Spring, SpringBoot, Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MySQL, MariaDB, REST, Git, Docker, CI/CD 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House We build modern, scalable applications with fintech-grade reliability and strong backend architecture. Our projects focus on high-performance web platforms and integrations using Java Spring and Node.js ecosystems. Your Role As a Fullstack Developer, you’ll primarily work with Java Spring and Node.js on the backend, and React on the frontend. You’ll collaborate closely with backend and frontend engineers to deliver scalable production-ready applications. Responsibilities Develop backend services using Java / Spring Boot and Node.js (NestJS / Express) Build frontend applications with React / Next.js + TypeScript Design and maintain REST APIs and integrations Work with relational databases including PostgreSQL, MySQL, and MariaDB Collaborate with designers, backend developers, and product teams Participate in architecture and technical decision-making Maintain and improve production applications Requirements Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Commercial experience with Java / Spring Boot, Node.js backend development Experience with React + TypeScript Good knowledge of relational databases (PostgreSQL, MySQL, MariaDB) Experience building and maintaining production applications Understanding of API integrations and backend architecture English at least B2 level Nice to have Experience with microservices architecture Cloud deployment experience CI/CD knowledge Docker and containerization experience Experience with scalable backend systems Tech Stack Area: Technologies Backend: Java Spring Boot, Node.js, NestJS, Express Frontend: React, Next.js, TypeScript Databases: PostgreSQL, MySQL, MariaDB DevOps: Docker, CI/CD Tools: Git, REST APIs Recruitment Process 1. Intro Call – Quick chat about your experience, expectations, and our projects 2. Technical Interview / Task – Backend and frontend discussion focused on Java Spring, Node.js, and React 3. Final Meeting – team fit and project discussion 4. Fast feedback after each stage within a few days. 5. Process usually takes 2–3 weeks .

🏢 Summary: Full-stack Developer role focused on building and maintaining modern web applications using the JavaScript/TypeScript ecosystem with React 17+ and NestJS. The position involves developing scalable UI, designing REST APIs, working with SQL and NoSQL databases, and contributing to microservices-based architecture. Responsibilities include feature development, system integrations, testing, and maintaining high code quality standards. 🗂️ Requirements: Commercial experience with React 17+, Strong knowledge of TypeScript, Practical experience with Redux Toolkit and Zustand, Experience with NestJS and REST API development, Knowledge of SQL databases (MySQL or MariaDB), Basic knowledge of MongoDB, Experience with Docker, Ability to write unit and integration tests using Jest, Understanding of microservices architecture, Knowledge of SOLID, KISS, DRY and Clean Code principles, Experience with Linux CLI, Basic knowledge of CI/CD with GitHub Actions 📃 Skills: JavaScript, TypeScript, React, ReduxToolkit, Zustand, TailwindCSS, MaterialUI, NestJS, NodeJS, REST, SQL, MySQL, MariaDB, MongoDB, Jest, Docker, Linux, CICD, GitHubActions, Microservices 🏢 Description: Poszukujemy doświadczonego Full-stack Developera specjalizującego się w budowie nowoczesnych aplikacji webowych w oparciu o ekosystem JavaScript/TypeScript. Od wersji 17 aktywnie pracującego z Reactem, tworzącegi skalowalne i wydajne interfejsy użytkownika z naciskiem na czytelność kodu oraz wysoką jakość UX. Zależy nam na praktycznym doświadczeniu w zarządzaniu stanem aplikacji z wykorzystaniem Redux Toolkit oraz Zustand - dobierając narzędzia adekwatnie do złożoności projektu. W codziennej pracy powinien korzystać również z bibliotek komponentów, takich jak MUI (Material UI), przyspieszając development i dbając o spójność wizualną aplikacji. Oczekujemy, aby na warstwie backendowej pracował z NestJS, projektując i rozwijając REST API zgodnie z dobrymi praktykami architektonicznymi oraz zasadami czystego kodu. Kandydat powinien rozumieć koncepcje architektury mikroserwisowej i potrafić odnaleźć się w systemach rozproszonych. Zakres obowiązków: utrzymanie kodu istniejących aplikacji oparte o stack (docker, nodejs - nest, react, mysql, mongodb) wdrażanie nowych funkcjonalności w istniejącej aplikacji tworzenie rozwiązań ułatwiających korzystanie z platformy - raporty, analityka integracje nowych i istniejących systemów z zewnętrznymi REST API oparte o stack (docker, nodejs - nest, react, mysql, mongodb) wsparcie architekta systemów w projektowaniu nowych rozwiązań Oczekujemy: Kluczowe kompetencje techniczne: Frontend: • React 17+ • TypeScript • Redux Toolkit, Zustand • Tailwind CSS • MUI (Material UI) • Budowa responsywnych i skalowalnych UI • Integracja z REST API Backend: • NestJS • Tworzenie i rozwój REST API • Walidacja, autoryzacja, middleware • Projektowanie struktury aplikacji Bazy danych: • SQL • MySQL • MariaDB • MongoDB (podstawy) Testowanie: Jest - testy jednostkowe i integracyjne DevOps / Środowisko: • Docker - konteneryzacja aplikacji • Podstawy Linux (CLI, zarządzanie środowiskiem) - Podstawy CI CD w oparciu o GitHub Actions Architektura i dobre praktyki: • Znajomość architektury mikroserwisowej • Stosowanie zasad: • SOLID • KISS • DRY • Clean Code • Dbałość o modularność i skalowalność rozwiązań • Code review, standaryzacja struktury projektów Oferujemy: Współpracę B2B z wynagrodzeniem 13000- 16000 netto+VAT za 150h miesięcznie. Dużą samodzielność i realny wpływ na kształtowanie kierunku rozwoju produktu i procesów Możliwość pracy hybrydowej (biuro na Mokotowie) Swobodną i przyjazną atmosferę w zespole Pakiet benefitów - dofinansowanie do prywatnej opieki medycznej, karty Multisport, lekcji języka angielskiego oraz kafeteria MyBenefit

🏢 Summary: Senior Full Stack Developer role focused on building high-performance, data-driven web applications with a strong emphasis on React and complex graph visualizations. The position involves developing scalable Node.js APIs and transforming large-scale graph data into interactive UI components. Fully remote B2B contract within a Poland-based team working standard business hours. 🗂️ Requirements: 7+ years of software development experience, Expert knowledge of React and TypeScript, Strong experience with Node.js and TypeScript for server-side development, Experience building REST and GraphQL APIs, Extensive experience with Redux state management, Proficiency with Storybook for component-driven development, Ability to optimize frontend performance for large-scale datasets, High proficiency in English (B2/C1) 📃 Skills: React, TypeScript, Node.js, Redux, GraphQL, REST, D3.js, GoJS, Cytoscape, Neo4j, Cypher, AGGrid, Storybook, Microservices 🏢 Description: Senior Full Stack Developer (React / Node.js ) The Role As a Full Stack Developer with a strong emphasis on React , you will be responsible for crafting the visual and interactive elements of applications that visualize complex financial and ownership networks. While the backend is built on Node.js , your primary challenge will be turning intricate graph data into seamless, high-performance UI components. Key Responsibilities React Excellence: Lead the development of complex, data-driven web applications using React and TypeScript . Graph Visualization: Transform raw graph data into interactive, responsive UIs using D3.js, GoJS , or similar libraries. Backend Services: Develop and maintain scalable APIs and microservices using Node.js and TypeScript . Data Integration: Work closely with graph engineers to integrate real-time GraphQL data and high-end AG Grid reports. Performance: Optimize the frontend to handle and render large-scale, nested datasets without lag. Architecture: Maintain reusable components in Storybook and ensure a consistent, scalable codebase. Technical Requirements (Must Have) 7+ years of experience in software development. Expert React & TypeScript: Deep knowledge of modern React patterns and performance tuning. Node.js & TypeScript: Solid experience in building server-side applications and REST/GraphQL APIs. State Management: Extensive experience with Redux . Modern Tooling: Proficiency with Storybook for component-driven development. English: High proficiency ( B2/C1 ) for daily collaboration with US and Netherlands-based stakeholders. Nice to Have Data Viz: Experience with D3.js, GoJS , or Cytoscape . Graph Databases: Familiarity with Neo4j, or Cypher Reporting: Advanced knowledge of AG Grid . Assignment Details Contract Type: B2B Work Model: 100% Remote / Work from Home Business Hours: 9:00 – 17:00 (Warsaw Time) Location: Poland-based delivery team

🏢 Summary: Full Stack Developer role focused on building scalable, cloud-native applications using React and C# .NET Core in a capital markets environment. The position involves developing microservices, REST APIs, data pipelines, and analytical solutions supporting credit and market risk domains. 100% remote B2B contract with flexible start date. 🗂️ Requirements: 4-5+ years of full stack development experience, Strong expertise in React, Strong expertise in C#, Experience with .NET Core, Experience with microservices architecture, Experience with event-driven architecture, Experience with distributed systems, Experience building REST APIs, Hands-on experience with Python, Experience with PySpark, Experience with Power BI, Experience with data modeling, Experience in credit risk and market risk domains 📃 Skills: React, C#, .NETCore, Microservices, REST, TypeScript, Python, PySpark, PowerBI, DataModeling, DistributedSystems, EventDriven, Cloud 🏢 Description: Start Date: ASAP / Within 1 Month / Flexible Work Model: 100% remote Contract Type: B2B (140-160 PLN/h + VAT) We are looking for a highly skilled Full Stack Developer with deep expertise in React for frontend development and C# .NET Core for backend services. This role requires hands‑on experience building scalable, cloud‑native systems, along with strong exposure to capital markets, especially within credit risk and market risk domains. Expectations Minimum 4-5 years of professional software development experience across frontend and backend technologies. Strong expertise in React, C# .NET Core , microservices, event‑driven architecture, and distributed systems. Hands‑on experience with Python (pyspark), Power BI dashboards, data modeling, and analytical reporting. Responsibilities Develop and maintain full stack applications using React, C# .NET Core, and modern cloud‑native technologies. Build scalable backend services, REST APIs, and microservices with a focus on performance and resilience. Implement modular, accessible, and high‑quality frontend components using React and TypeScript. Collaborate with business and risk experts to deliver solutions in credit risk, market risk, and capital markets workflows. Work with Python (pyspark) to build data pipelines, transformations, and analytics processes. What We Offer Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing and building scalable backend and frontend applications, with strong emphasis on Java/Spring-based microservices and React frontend. The position involves API development, cloud-ready architecture, CI/CD practices, and ensuring non-functional requirements such as security and resilience. The developer will collaborate cross-functionally to deliver reliable, high-quality solutions in an Agile environment. 🗂️ Requirements: Experience developing APIs and Microservices using Java or Spring Boot, Experience with Java/J2EE and Spring Framework, Experience with Hibernate JPA, Experience building and consuming REST web services, Experience processing XML and JSON data, Experience with RDBMS databases (Oracle, PostgreSQL), Experience with MongoDB, Experience working in Agile/Scrum/Kanban methodologies, Experience with CI/CD pipelines, Experience with Jenkins, Experience with Docker, Experience with Git, Knowledge of Unix, Frontend experience with React.js, Experience with JavaScript and TypeScript, Understanding of code security principles 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, React, JavaScript, TypeScript, CI/CD 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing and maintaining scalable backend and frontend applications with strong emphasis on Java-based APIs, microservices, and cloud-ready architecture. The position involves building resilient solutions, ensuring non-functional requirements, and collaborating with cross-functional teams in an Agile environment. The role requires regular office presence in Cracow and offers a competitive hourly rate. 🗂️ Requirements: Hands-on experience with Java and Spring Boot for APIs and Microservices, Experience with Java/J2EE, Spring Framework, Hibernate JPA, Experience with REST web services and XML/JSON processing, Understanding of code security principles, Experience with RDBMS databases (Oracle, PostgreSQL) and MongoDB, Experience with CI/CD pipelines and Jenkins, Experience with Docker, GIT, shell scripting, Unix, Frontend experience with React.js, JavaScript, TypeScript, Experience working in Agile/Scrum/Kanban methodologies, Knowledge of data modelling and architecture design concepts 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, GIT, Unix, Shell, React, JavaScript, TypeScript, CI/CD, Microservices 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing, developing, and maintaining scalable backend and frontend applications with strong emphasis on API and microservices architecture. The position involves building resilient cloud-ready solutions, ensuring non-functional requirements, and collaborating with cross-functional teams in an Agile environment. The role requires strong Java/Spring expertise, frontend experience with React, and hands-on knowledge of CI/CD and modern DevOps practices. 🗂️ Requirements: Hands-on experience developing APIs and Microservices using Java or Spring Boot, Experience with Java/J2EE application development, Experience with Spring Framework and Hibernate JPA, Experience building REST web services and processing XML/JSON, Understanding of code security principles, Experience with RDBMS databases, Experience with Oracle, PostgreSQL, or MongoDB, Experience working in Agile/Scrum/Kanban environments, Experience with CI/CD pipelines, Experience with Jenkins and Docker, Experience with shell scripting and Git, Knowledge of Unix, Frontend experience with React.js, Proficiency in JavaScript and TypeScript 📃 Skills: Java, J2EE, Spring, SpringBoot, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, React, JavaScript, TypeScript, CI/CD 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.