Fullstack developer (Kotlin+React)

🏢 Summary: Fullstack Developer (Kotlin + React) role focused on building and integrating internal tools that streamline technology teams’ operations within a large organization. The position involves backend and frontend development, API-based system integrations, and contributing to architecture and technical standards. The project aims to improve efficiency through self-service components and modern technology stack. 🗂️ Requirements: Minimum 3 years of experience with Kotlin, Strong knowledge of Spring Boot, Strong knowledge of React, Proficiency in JavaScript or TypeScript, Experience with Git version control, Knowledge of relational databases, Practical experience with PostgreSQL, Experience designing and integrating REST APIs, Availability for hybrid work in Warsaw (once a week in office) 📃 Skills: Kotlin, Spring, SpringBoot, React, JavaScript, TypeScript, Git, PostgreSQL, SQL, REST, API, npm 🏢 Description: Wspólnie z Partnerem z sektora ubezpieczeniowego poszukujemy osoby na stanowisko Fullstack Developer (Kotlin+React) do projektu, którego celem jest realne usprawnienie funkcjonowania dużej organizacji. Inicjatywa koncentruje się na rozwoju narzędzi wspierających pracę zespołów technologicznych oraz integracji systemów wykorzystywanych w zarządzaniu infrastrukturą, dzięki czemu zespoły technologiczne mogą działać szybciej i efektywniej. 💡 TWOJA ROLA Rozwój backendu oraz frontendowych komponentów z wykorzystaniem Kotlin , Spring Boot , React oraz JavaScript/TypeScript. Projektowanie i implementacja integracji między systemami i usługami w środowisku opartym o API. Współtworzenie architektury rozwiązań, standardów technologicznych oraz dobrych praktyk w zespole. Tworzenie i rozwój narzędzi oraz komponentów Self-Service wspierających zespoły technologiczne. 🔍 CZEGO OCZEKUJEMY OD CIEBIE Minimum 3 lata doświadczenia w programowaniu z wykorzystaniem Kotlin . Doświadczenie w pracy z systemem kontroli wersji Git oraz stosowanie dobrych praktyk programistycznych. Bardzo dobra znajomość Spring Boot , React , JavaScript lub TypeScript oraz praca z npm . Znajomość relacyjnych baz danych oraz praktyczne doświadczenie w pracy z PostgreSQL . Doświadczenie w projektowaniu i integracji systemów z wykorzystaniem REST API . Gotowość do pracy w trybie hybrydowym w Warszawie - raz w tygodniu biuro . ✨ OFERUJEMY Uczestnictwo w spotkaniach integracyjnych oraz meetupach technologicznych, umożliwiających dzielenie się wiedzą i doświadczeniem. Wsparcie dedykowanego opiekuna Connectis, który zawsze jest dostępny, by pomóc w sprawach związanych z projektem. Rozwój kariery i długofalową współpracę w firmie o ugruntowanej pozycji na rynku. 5000 PLN za polecenie znajomego do projektów. Dostęp do najnowszych technologii i narzędzi pracy. Szybki i zdalny proces. Dziękujemy za wszystkie zgłoszenia. Informujemy, że skontaktujemy się wyłącznie z wybranymi osobami.

🏢 Summary: Senior Full-Stack Engineer role focused on building and maintaining internal applications that connect in-house experts with millions of clients on a large-scale consumer platform. The position involves leading complex projects, shaping features from concept to deployment, and driving technical decisions using modern practices like TDD and continuous delivery. The role combines hands-on development with technical leadership and cross-functional collaboration. 🗂️ Requirements: 5+ years of professional software development experience, Experience as Technical Lead, Extensive hands-on experience with Ruby on Rails, Extensive hands-on experience with TypeScript, Experience with Next.js, Experience with React, Experience with CSS/Sass, Experience with GraphQL, Experience with Apollo, Experience designing and consuming APIs, Ability to lead complex technical projects, Experience with TDD, Experience with continuous delivery, Experience with service-oriented architecture 📃 Skills: Ruby, Rails, TypeScript, Next.js, React, CSS, Sass, GraphQL, Apollo, TDD, CI/CD, SOA, API 🏢 Description: We are looking for a Senior Full-Stack Engineer to join project for a leading US-based tech-driven consumer platform. In this role, you will build and maintain the internal applications that empower thousands of in-house experts to connect with millions of clients. By combining human expertise with best-in-class AI and recommendation algorithms, your work will have a direct, high-visibility impact on client retention and operational efficiency. You will be joining a collaborative, agile-inspired team of bright and kind engineers who value integrity, innovation, and trust, while utilizing modern practices like TDD, continuous delivery, and service-oriented architecture. Responsibilities: Lead the execution of complex projects within your team and across multiple engineering units. Act as an engaged, hands-on team member - lead meetings, create technical design documents, and pair program with other engineers. Collaborate closely with product, design, UX, data science, and mobile partners to shape features from concept to deployment. Provide technical leadership through mentorship, timely feedback, and code reviews, actively investing in the career growth of your teammates (team size: 1 Lead + 3 Senior FTEs). Break down large projects into actionable milestones and deliver sustainable results against measurable goals. Use data to frame business problems and drive technical decisions, guiding other engineers toward solutions that balance quality with pragmatism. Proactively communicate status updates, scope changes, and timeline shifts to teammates, stakeholders, and leadership. Participate in on-call rotations and help improve the on-call experience for others. Min requirements: 5+ years of professional software development experience. Have an experience as a technical lead Extensive, hands-on experience with Ruby on Rails, TypeScript, Next.js, React, and CSS/Sass . Proven experience with GraphQL and Apollo , including both consuming APIs and designing schemas. Exceptional communication skills with a track record of setting clear priorities and sharing them openly. A collaborative mindset - you enjoy mentoring other engineers, creating space for them to grow, and believe strong teams are built on trust and honesty. Would be a plus: Previous experience working in client-side / customer-facing teams. We offer: Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Flexible schedule Benefits package - medical insurance, sports Corporate social events Professional development opportunities Well-equipped office About us: Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI , supported by profound expertise and ongoing investment in data , analytics , cloud & DevOps , application modernization and customer experience . Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.

🏢 Summary: Senior Full Stack Engineer role focused on building enterprise-grade Java applications with end-to-end ownership across backend, frontend, security, and CI/CD. The position requires daily commercial use of Agentic AI tools to accelerate development, testing, and code quality. You will design secure, scalable systems using modern Java frameworks and DevOps practices. 🗂️ Requirements: 5+ years commercial experience with Java, Proven commercial experience using AI-powered development tools, Strong proficiency in Spring Boot, Strong proficiency in Spring Security, Strong proficiency in Hibernate or JPA, Experience with HTML5, CSS3, and JavaScript frameworks, Hands-on experience with React, Angular, or Vue, Strong experience designing and maintaining Jenkins CI/CD pipelines, Experience with Docker and Kubernetes, Experience designing RESTful APIs, Solid understanding of cryptography and secure key management, Experience with JUnit and Mockito for automated testing 📃 Skills: Java, SpringBoot, SpringSecurity, Hibernate, JPA, SQL, MySQL, PostgreSQL, Oracle, JavaScript, HTML5, CSS3, React, Angular, Vue, Jenkins, Docker, Kubernetes, REST, GitHubCopilot, ChatGPT, Claude, Cline, JUnit, Mockito, Cucumber, Cryptography, CI/CD, Agile, Scrum 🏢 Description: We are seeking a Senior Full Stack Engineer to join our development team, focusing on building robust Java-based enterprise applications while heavily leveraging Agentic AI tools to drive efficiency and innovation. In this role, you will be responsible for the end-to-end software development lifecycle, from backend services and database optimization to user-friendly frontend interfaces and secure CI/CD pipelines. A crucial aspect of this position is the daily, hands-on integration of AI-powered development tools to accelerate coding, code review, and problem-solving. Tech Stack: Java, Spring Boot, Spring Security, Hibernate ORM, SQL (MySQL/PostgreSQL/Oracle), JavaScript (React/Angular/Vue.js), Jenkins, Docker, Kubernetes, RESTful APIs, Agentic AI (GitHub Copilot, ChatGPT, Claude, Cline) Responsibilities: Design, develop, and maintain full-stack applications using Java and modern web technologies. Integrate Agentic AI tools (like GitHub Copilot, ChatGPT, Claude, and Cline) into daily development workflows to accelerate coding, code reviews, testing, and documentation. Design, build, and maintain Jenkins CI/CD pipelines to optimize automated builds, tests, and deployments. Implement robust cryptographic solutions and security protocols to protect sensitive data. Write comprehensive unit and integration tests using JUnit, Mockito, and Cucumber to ensure high reliability. Share best practices for AI tool usage across the team and continuously evaluate emerging Agentic AI technologies. Debug complex technical issues, participate in code reviews, and collaborate closely with product, design, and QA partners within an Agile/Scrum framework. Min requirements: COMMERCIAL EXPERIENCE WITH AI TOOLS IS OBLIGATORY: You must have proven, commercial experience using AI-powered development tools (e.g., GitHub Copilot, ChatGPT, Claude, Cline) to accelerate software delivery. 5+ years of hands-on software development experience with Java . Strong proficiency in Spring Boot , Spring Security , and Hibernate/JPA . Solid experience with frontend technologies (HTML5, CSS3, JavaScript, and frameworks like React, Angular, or Vue.js). Strong, hands-on experience designing and maintaining Jenkins CI/CD pipelines . Solid understanding of cryptography (encryption/decryption, digital signatures, and secure key management). Experience with containerization (Docker, Kubernetes) and designing RESTful web services. Strong background in automated testing (JUnit, Mockito). Would be a plus: 2+ years of experience in payment processing, fintech, or financial services. Knowledge of payment protocols (ISO 8583, EMV), PCI DSS compliance, and financial regulations. Experience with HSMs (Hardware Security Modules) and payment-industry cryptographic standards. Experience with microservices, distributed systems, and cloud platforms (AWS, Azure, or GCP). Knowledge of Android or iOS app development. Contributions to open-source projects or active technical blogging. We offer: Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Flexible schedule Benefits package - medical insurance, sports Corporate social events Professional development opportunities Well-equipped office About us: Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI , supported by profound expertise and ongoing investment in data , analytics , cloud & DevOps , application modernization and customer experience . Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.

🏢 Summary: Senior Full Stack Engineer (Python) role focused on building and modernizing a complex B2B SaaS platform for enterprise clients. The position involves end-to-end development, modernization of a Python/Flask codebase, AI-generated code review, backend architecture improvements, and collaboration across AI and frontend engineering teams. The offer includes flexible scheduling, benefits, professional development, and work on advanced enterprise-grade projects. 🗂️ Requirements: Commercial experience as Senior Backend or Full Stack Engineer, Hands-on coding experience, Strong Python proficiency, Experience with Flask, FastAPI, or Django, Knowledge of web application architecture, Experience with PostgreSQL, Strong SQL skills, Database schema design experience, Web security and vulnerability mitigation knowledge, Experience with AI coding tools, Docker experience, Kubernetes experience, Experience with Redis or Celery, Independent problem-solving skills, Ability to work with complex codebases 📃 Skills: Python, Flask, FastAPI, Django, PostgreSQL, SQL, Docker, Kubernetes, Redis, Celery, Copilot, Cursor, Claude, SQLAlchemy, SQLObject, Angular 🏢 Description: We are looking for a highly experienced, strictly hands-on Senior Full Stack Engineer (Python) to join a senior engineering team. You will drive the delivery and modernization of a complex B2B SaaS platform used by global enterprise clients. In this role, you will build new product modules end-to-end, from technical specification through to production deployment, while modernizing a mature codebase. Responsibilities: Build new platform modules end-to-end: translate business requirements into technical specs (use cases, data models, API designs) through to production deployment Execute modernization of the Python/Flask codebase - clean layered architecture, reduced technical debt, improved testability Act as quality gate for all AI-generated code - catching logic errors, security issues, and architectural violations Partner with the Intelligence Systems Engineer on features touching the AI/agent layer Collaborate with the Angular Architect on API contracts and frontend integration Write operational documentation: changelogs for QA, operations guides for DevOps, architecture docs for developers Proactively identify and address security concerns during development Min requirements: Proven commercial experience as a Senior Backend or Full Stack Engineer, actively engaged in hands-on coding (no pure advisory roles). Strong proficiency in modern Python, with a focus on writing clean, type-safe, and well-documented code. Solid experience with Python web frameworks (e.g., Flask, FastAPI, Django) and a good understanding of web application architecture. Expertise in relational databases (preferably PostgreSQL), SQL, and schema design. Strong security mindset with a proven ability to identify, understand, and mitigate real-world web vulnerabilities. Hands-on experience using AI coding tools (Copilot, Cursor, Claude) as part of your daily workflow, paired with a critical eye for reviewing AI-generated code. Experience working with containerization (Docker, Kubernetes) and background processing systems (e.g., Redis, Celery). Excellent independent problem-solving skills and the ability to navigate complex codebases. Would be a plus: Proven experience decomposing monolithic/legacy codebases into a clean, layered architecture. Hands-on modernization experience within mature, production-grade SaaS products. Familiarity with Python ORMs (e.g., SQLObject, SQLAlchemy). We offer: Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Flexible schedule Benefits package - medical insurance, sports Corporate social events Professional development opportunities Well-equipped office About us: Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI , supported by profound expertise and ongoing investment in data , analytics , cloud & DevOps , application modernization and customer experience . Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.

🏢 Summary: Fullstack Developer (Kotlin + React) role in an e-commerce project focused on building intelligent tools for advertisers, including recommendation systems and campaign automation features. The position involves backend development with ML integration, big data processing in cloud environments, and scalable microfrontend development. Remote work with occasional on-site meetings, 12-month engagement starting ASAP. 🗂️ Requirements: Very good knowledge of Kotlin, Experience with Spring Boot, Experience with microservices architecture, Practical experience with cloud ecosystem (preferred GCP), Knowledge of relational and non-relational databases, Commercial experience with TypeScript, Commercial experience with React, Proficiency in CSS, Proficiency in HTML, Knowledge of testing frameworks (Jest or Vitest or Playwright), English proficiency at minimum B2 level 📃 Skills: Kotlin, Spring, SpringBoot, Microservices, GCP, SQL, MongoDB, TypeScript, React, CSS, HTML, Jest, Vitest, Playwright, Agile, Scrum, BigData, API, Microfrontends, SSR, Accessibility, Scala 🏢 Description: Dla naszego klienta z branży e-commerce poszukujemy doświadczonego Fullstack Developera ze znajomością Kotlina i Reacta . Projekt polega na stworzeniu inteligentnych narzędzi wspomagających reklamodawców. Obejmuje rozwój systemów rekomendacji oraz integrację funkcji automatyzujących obsługę kampanii reklamowych, dzięki czemu sprzedawcy mogą łatwiej rozwijać swoją działalność. Model pracy: zdalnie (spotkania w Krakowie lub Warszawie 1-2 razy/kwartał) Start: ASAP Czas trwania: 12 mscy Zakres obowiązków Rozwój backendu i integracja ML: Projektowanie i wdrażanie wydajnych usług backendowych, które serwują spersonalizowane rekomendacje (bliska współpraca z zespołem Data Science) Przetwarzanie danych (Big Data): Rozbudowa rozproszonej architektury sterowanej zdarzeniami (event-driven), odpowiedzialnej za procesowanie dużych wolumenów danych w chmurze obliczeniowej przy użyciu systemów kolejkowych Integracja API: Tworzenie i optymalizacja wysokowydajnych interfejsów API na potrzeby dashboardów analitycznych oraz benchmarków rynkowych Tworzenie rozwiązań frontendowych: Rozwój skalowalnych mikrofrontendów w oparciu o bibliotekę React, z silnym naciskiem na wydajność oraz standardy dostępności Praca w metodyce Agile: Aktywny udział w ceremoniach Scrum, dbanie o jakość kodu (code review) oraz współdzielenie wiedzy wewnątrz zespołu Oczekiwania Bardzo dobra znajomość języka Kotlin oraz frameworka Spring Boot Doświadczenie w pracy z architekturą mikroserwisów Praktyczna znajomość ekosystemu chmurowego (preferowane GCP) Znajomość relacyjnych i nierealacyjnych baz danych (SQL, MongoDB) Otwartość na nowoczesne narzędzia AI wspierające programowanie (np. Copilot, OpenCode) Komercyjne doświadczenie w pracy z TypeScript oraz React Biegłość w CSS i HTML Znajomość frameworków testowych (np. Jest, Vitest, Playwright) Znajomość języka angielskiego na poziomie min. B2 Mile widziane: doświadczenie z architekturą Microfrontends; znajomość zagadnień związanych z Server-Side Rendering (SSR) oraz Accessibility; podstawowa znajomość lub komercyjne doświadczenie w Scala Oferujemy Stałe wsparcie osobistego agenta , dbającego o Twoją ciągłość projektową, kontakt z klientem, niezbędne formalności, komfort pracy oraz rozwój, Consultant Development Program – doradztwo w planowaniu kariery w oparciu o najnowsze trendy i potrzeby rynku IT, obejmujące m.in . konsultacje z agentami i mentorami kariery , Dostęp do 7N Learning & Development – platformy rozwojowo-edukacyjnej z webinarami, biblioteką artykułów i raportów branżowych oraz regularnymi zaproszeniami na jednorazowe i cykliczne wydarzenia rozwojowe – techniczne, biznesowe oraz life-stylowe, Spektakularne eventy integracyjne , zarówno dla Ciebie (np. coroczny wyjazd Kick-Off , imprezy świąteczne czy sportowe Letnie Igrzyska), jak i dla Twoich bliskich (np. pikniki rodzinne, premiery filmowe), Rozwój zawodowy nie tylko podczas projektu – możesz zaangażować się w przekazywanie wiedzy innym w ramach oferty 7N Services kierowanej do klientów 7N, Relacje i dostęp do wiedzy najbardziej doświadczonych ekspertów IT na rynku – średni staż zawodowy naszego Konsultanta w Polsce to ponad 10 lat. Pakiet benefitów zaplanowany od A do Z , czyli dofinansowanie do opieki medycznej, ubezpieczenia na życie, karty sportowej dla Ciebie i Twoich bliskich, a także zniżki do sklepów w Polsce i za granicą

🏢 Summary: Fullstack Developer role focused on building and maintaining a global digital product supporting resale and service operations. The position covers end-to-end ownership of micro frontends and microservices, from development to production deployment. The role emphasizes scalability, performance, cloud infrastructure, and modern development practices. 🗂️ Requirements: Strong backend experience with Java or Kotlin, Solid frontend development experience with React or similar framework, Experience working in AWS cloud environment, Practical knowledge of microservices architecture, Experience with CI/CD pipelines, Ability to work in trunk-based development model, Experience with event-driven systems such as Kafka, Experience with Kubernetes-based deployments 📃 Skills: Java, Kotlin, React, AWS, Kubernetes, Kafka, GitLab, Microservices, Microfrontends, CICD, Trunkbased, Eventdriven 🏢 Description: 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. 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. 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: Full Stack Developer role with a primary focus on backend development in Java, responsible for building and maintaining scalable, secure microservices and REST APIs within an Agile environment. The position involves database design, cloud integration, and CI/CD pipeline participation, with additional work on modern React-based frontend components. The role emphasizes high code quality, performance optimization, and secure application architecture. 🗂️ Requirements: 5+ years experience in Full Stack or Backend development, Strong proficiency in Java, Experience with Spring Boot, Hibernate, JPA, Experience building REST APIs and microservices, Knowledge of OAuth2 and JWT authentication, Experience with SQL and NoSQL databases, Experience with CI/CD pipelines, Experience with Docker and Kubernetes, Cloud platform experience (AWS, Azure, or GCP), Experience working in Agile teams, Bachelor’s or Master’s degree in Computer Science or related field 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, REST, Microservices, OAuth2, JWT, PostgreSQL, MySQL, MongoDB, Redis, React, Redux, TypeScript, JavaScript, HTML5, CSS3, MaterialUI, Bootstrap, Tailwind, Jenkins, GitHubActions, GitLab, Docker, Kubernetes, AWS, Azure, GCP 🏢 Description: Overview We are a company leveraging AI to optimize business operations. Our mission is to provide digital solutions and consulting services that help companies grow and create value. By using modern technology, we simplify processes, increase efficiency, and discover new revenue opportunities—especially in private capital markets. Our ecosystem includes: PaaS (Platform as a Service): A core platform that enhances workflows, provides actionable insights, and supports value creation. SaaS (Software as a Service): A cloud platform offering robust performance and intelligent tools at scale. S&C (Solutions & Consulting): Flexible tools and methodologies to manage, grow, and improve company performance. With over 10 years of experience working with fast-growing companies and private equity businesses, we know how to harness technology to deliver tangible business advantages. Job Description We are looking for Full Stack Developer with strong Java expertise. While your main focus will be backend systems, experience with modern frontend technologies (React.js, TypeScript) is also required. You will join an Agile team to design, build, and maintain scalable, secure, and high-performing applications. Key Responsibilities Backend Development (Primary Focus) Develop and maintain REST APIs and microservices using Java (Spring Boot, Hibernate, JPA). Implement secure authentication, authorization, and data handling mechanisms. Design and optimize databases (PostgreSQL, MySQL, MongoDB) for performance and reliability. Integrate with third-party APIs, cloud services, and internal systems. Participate in deployment pipelines using CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD) and containerization (Docker, Kubernetes). Frontend Development (Nice-to-Have) Build responsive UI components using React.js, Redux, and modern JavaScript/TypeScript. Apply best practices in UI/UX design, performance optimization, and cross-browser compatibility. Work with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS. Code Quality & Testing Write clean, maintainable, and well-documented code. Create unit and integration tests for backend services, and frontend components if applicable. Collaboration & Agile Development Collaborate with designers, product managers, and DevOps engineers. Participate in Agile/Scrum ceremonies and contribute to process improvement initiatives. Required Skills & Experience Backend Strong proficiency in Java , Spring Boot, Hibernate, JPA, and REST API development. Experience with microservices architecture and API Gateway. Knowledge of authentication/authorization protocols: OAuth2, JWT, sessions. Frontend (Optional / Nice-to-Have) Experience with React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript. Understanding of state management and component-based design. Familiarity with UI libraries/frameworks: Material-UI, Bootstrap, or Tailwind CSS. Database & DevOps SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis). CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD). Cloud platform experience (AWS, Azure, GCP) and containerization (Docker/Kubernetes). Qualifications Bachelor’s or Master’s degree in Computer Science, Engineering, or related field. 5+ years of experience as a Full Stack or Backend Developer. Experience working in Agile teams. Strong problem-solving and analytical skills. Soft Skills Excellent communication and teamwork abilities. Ability to manage multiple tasks in a fast-paced environment. Eagerness to learn new technologies and improve processes.

🏢 Summary: Full Stack Developer role focused on building and evolving a modern web application platform with complex workflows and data-driven features. The position involves developing and maintaining both frontend and backend components, ensuring scalability, performance, and reliability. You will collaborate within a cross-functional team to deliver iterative improvements using modern development practices and AI-assisted tools. 🗂️ Requirements: Experience in full stack web application development, Hands-on experience with React, Experience with C# and .NET or comparable backend technologies, Practical experience with SQL-based databases and writing queries, Experience using AI-assisted development tools (e.g., Claude, Cursor), Solid understanding of Git and version control workflows, Ability to work with and extend existing codebases 📃 Skills: React, TypeScript, C#, .NET, SQL, Git, REST, Claude, Cursor 🏢 Description: Project overview The project is a web based application platform designed to support complex user workflows and data driven features. It focuses on performance, maintainability, and iterative delivery of new capabilities. Team You will be part of a cross functional development team consisting of full stack developers, frontend specialists, backend engineers, and QA engineers. The team works collaboratively, reviews code regularly, and follows shared development standards and branching practices. Position overview We are looking for a Full Stack Developer to contribute to the development and evolution of a modern web application platform. You will work on both frontend and backend components, focusing on building reliable, scalable features and improving existing functionality. The role combines hands on development with close collaboration across engineering and product roles. Technology stack React, TypeScript, C#, .NET, SQL based databases, Git, REST APIs, AI assisted development tools such as Claude and Cursor Responsibilities Develop and maintain frontend features using React and related technologies Build and support backend services using C# and .NET Collaborate with team members on feature design, implementation, and code reviews Work with SQL based databases to design, query, and optimize data storage Use AI assisted development tools to improve development efficiency and code quality Follow established Git workflows and branching strategies Participate in troubleshooting, debugging, and performance improvements Requirements Experience building web application platforms in a full stack role Hands on experience with React for frontend development Experience with C# and .NET or comparable backend technologies Understanding of SQL based databases and practical experience writing queries Experience using AI tools to support software development, including Claude or Cursor Solid understanding of Git, version control, and common branching flows Ability to work with existing codebases and contribute to ongoing development Nice to have Experience with cloud based environments Familiarity with CI CD pipelines Experience working on large scale or long term web platforms Exposure to performance optimization and application monitoring What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Full Stack Developer role focused on building and maintaining cloud-native, event-driven applications on Google Cloud Platform. The position involves developing scalable backend services with Python (FastAPI) and modern frontend applications with React and TypeScript. You will design high-performance APIs and integrate GCP services to deliver production-ready solutions. 🗂️ Requirements: Strong proficiency in Python and FastAPI, Experience with asynchronous programming, Hands-on experience with React and TypeScript, Experience with Google Cloud Platform services, Experience with event-driven architecture and Pub/Sub systems, Experience with Cloud Run, Cloud Functions, Cloud Storage, Experience with Docker and GCP-based CI/CD pipelines, Experience with relational and NoSQL databases, Knowledge of RPC-based integrations, Ability to design synchronous and asynchronous APIs, Polish language proficiency at B2 level 📃 Skills: Python, FastAPI, React, TypeScript, GCP, PubSub, CloudRun, CloudFunctions, CloudStorage, Docker, CICD, CloudSQL, Firestore, BigQuery, SQL, NoSQL, RPC, SDK 🏢 Description: We are looking for an experienced Full Stack Developer to join a team responsible for building and maintaining modern cloud-native applications based on event-driven architecture and Google Cloud Platform technologies. In this role, you will contribute to the design, development, and optimization of scalable backend services and user-facing applications. You will work closely with product, design, and platform engineering teams to deliver high-quality production-ready solutions. Key Responsibilities Design, develop, and maintain scalable web applications using Python (FastAPI) and React Build backend services leveraging Google Cloud Platform SDKs and RPC-based integrations Develop and maintain event-driven architectures using Google Cloud Pub/Sub and related messaging technologies Design and implement high-performance synchronous and asynchronous APIs Create intuitive and responsive user interfaces using React, TypeScript, and modern UI frameworks Collaborate with product, design, and platform teams to deliver new features and enhancements Participate in architecture discussions, code reviews, and technical design sessions Ensure high code quality through testing, automation, and CI/CD best practices Requirements Strong proficiency in Python, including FastAPI and asynchronous programming Experience working with Google Cloud SDKs and cloud-native development Hands-on experience with React, TypeScript, and component-based UI development Solid understanding of event-driven architectures and Pub/Sub messaging systems Experience with Google Cloud services such as Cloud Run, Pub/Sub, Cloud Functions, and Cloud Storage Familiarity with Docker and CI/CD pipelines within GCP environments Experience with relational and NoSQL databases such as Cloud SQL, Firestore, and BigQuery Strong troubleshooting, performance optimization, and observability skills Excellent communication and collaboration skills, with experience working in distributed teams Polish B2 +

🏢 Summary: Fullstack Software Engineer (Kotlin + React) role in a data-driven advertising project within e-commerce, focused on building scalable microservices and modern web tools for campaign management. The position involves developing backend systems, APIs, and React-based dashboards, working with large data volumes and ML-powered recommendation systems. Remote full-time engagement with impact on solutions used by thousands of users. 🗂️ Requirements: Several years of experience as Fullstack Developer with strong backend focus, Strong knowledge of Kotlin, Strong knowledge of Spring Boot, Experience with microservices architecture, Experience with Google Cloud Platform, Experience with relational and non-relational databases, Strong knowledge of TypeScript, Strong knowledge of React, Experience with testing frameworks (Jest, Vitest or Playwright), Experience with large-scale data processing, Knowledge of Server-Side Rendering, Experience with AI-assisted development tools 📃 Skills: Kotlin, SpringBoot, Microservices, GCP, MongoDB, SQL, TypeScript, React, Jest, Vitest, Playwright, SSR, Scala, Copilot, AI, EventDriven, MachineLearning, REST, API 🏢 Description: Dla naszego klienta z branży e-commerce poszukujemy osoby na stanowisko Fullstack Software Engineer (Kotlin + React) do projektu z obszaru reklamy i danych. Dołączysz do zespołu rozwijającego nowoczesne narzędzia wspierające sprzedawców w zarządzaniu kampaniami reklamowymi i rozwijaniu ich biznesu. Projekt ma silny komponent data-driven i opiera się na przetwarzaniu dużych wolumenów danych oraz wykorzystaniu rozwiązań Machine Learning do budowy systemów rekomendacyjnych. To rola dla osoby, która dobrze odnajduje się w środowisku produktowym, lubi pracę przy skalowalnych systemach i chce mieć realny wpływ na rozwiązania wykorzystywane przez tysiące użytkowników. Lokalizacja: praca zdalna (1-2 razy na kwartał spotkanie w Warszawie lub Krakowie) Forma współpracy: full-time Start: 01.06.2026 Zaangażowanie: do końca 2026 (z możliwością przedłużenia) Zakres obowiązków Rozwój i utrzymanie systemów backendowych opartych o architekturę mikroserwisową Budowa i integracja rozwiązań wspierających systemy rekomendacyjne we współpracy z zespołami Data Science Projektowanie i rozwój wydajnych API zasilających narzędzia analityczne i dashboardy Praca z dużymi wolumenami danych w architekturze event-driven Rozwój warstwy frontendowej (React) - dashboardy i narzędzia dla użytkowników biznesowych Dbanie o jakość, wydajność i skalowalność tworzonych rozwiązań Oczekiwania Kilkuletnie doświadczenie w pracy na stanowisku Fullstack Developera , z wyraźnym naciskiem na rozwój backendu Bardzo dobra znajomość języka Kotlin oraz frameworka Spring Boot Doświadczenie w projektowaniu i rozwijaniu architektury mikroserwisowej Praktyczna znajomość środowisk chmurowych, w szczególności Google Cloud Platform (GCP) Doświadczenie w pracy z bazami danych - zarówno nierelacyjnymi (MongoDB), jak i relacyjnymi (SQL). Dobra znajomość TypeScript oraz biblioteki React w kontekście budowy nowoczesnych aplikacji webowych Znajomość narzędzi i frameworków testowych, takich jak Jest, Vitest lub Playwright Doświadczenie w pracy z narzędziami wspierającymi development, w tym rozwiązaniami typu Copilot lub innymi narzędziami opartymi o AI Znajomość języka angielskiego na poziomie minimum B2 , umożliwiająca swobodną pracę w środowisku technicznym. Znajomość podejścia Server-Side Rendering (SSR) Doświadczenie w projektach opartych o przetwarzanie dużych wolumenów danych Mile widziane: znajomość języka Scala Oferujemy Stałe wsparcie osobistego agenta , dbającego o Twoją ciągłość projektową, kontakt z klientem, niezbędne formalności, komfort pracy oraz rozwój, Consultant Development Program – doradztwo w planowaniu kariery w oparciu o najnowsze trendy i potrzeby rynku IT, obejmujące m.in . konsultacje z agentami i mentorami kariery , Dostęp do 7N Learning & Development – platformy rozwojowo-edukacyjnej z webinarami, biblioteką artykułów i raportów branżowych oraz regularnymi zaproszeniami na jednorazowe i cykliczne wydarzenia rozwojowe – techniczne, biznesowe oraz life-stylowe, Spektakularne eventy integracyjne , zarówno dla Ciebie (np. coroczny wyjazd Kick-Off , imprezy świąteczne czy sportowe Letnie Igrzyska), jak i dla Twoich bliskich (np. pikniki rodzinne, premiery filmowe), Rozwój zawodowy nie tylko podczas projektu – możesz zaangażować się w przekazywanie wiedzy innym w ramach oferty 7N Services kierowanej do klientów 7N, Relacje i dostęp do wiedzy najbardziej doświadczonych ekspertów IT na rynku – średni staż zawodowy naszego Konsultanta w Polsce to ponad 10 lat. Pakiet benefitów zaplanowany od A do Z , czyli dofinansowanie do opieki medycznej, ubezpieczenia na życie, karty sportowej dla Ciebie i Twoich bliskich, a także zniżki do sklepów w Polsce i za granicą O 7N Ciągłe poszukiwanie projektów, trudne negocjacje stawek, brak wsparcia w rozwoju – brzmi znajomo? W 7N zyskujesz nie tylko stabilność kontraktów, ale też zaangażowanie osobistego opiekuna dbającego o Twój komfort zawodowy i stały dostęp do inicjatyw rozwojowych. Naszym celem jest zapewnienie Ci stabilnej i komfortowej współpracy, która przyczyni się do sukcesu Twojego jako eksperta IT oraz naszych klientów. Budujemy trwałe relacje, bazując na skandynawskich wartościach i 30-letnim doświadczeniu w tworzeniu rozwiązań IT dla ponad 200 organizacji.