Senior Node.js Developer

🏢 Summary: Backend-focused role involving development of scalable web applications using Java and React/Next.js. The position includes building and optimizing server-side components, APIs, and databases while ensuring performance and security. Close collaboration with cross-functional teams and end-to-end responsibility for backend quality and scalability are expected. 🗂️ Requirements: Minimum 4 years experience in similar role, Proficiency in Java server-side programming, Strong knowledge of React and Next.js, Experience with React Router and Redux, Experience with MySQL, PostgreSQL or MongoDB, Experience building scalable web applications, Knowledge of web performance and security principles, Experience with Git version control, Ability to conduct testing and debugging, English level B2 or higher 📃 Skills: Java, React, Next.js, Redux, ReactRouter, MySQL, PostgreSQL, MongoDB, SQL, NoSQL, API, REST, Git, AWS, Azure, GCP, Docker, NodeJS, Security, Testing 🏢 Description: Responsibilities: Designing, developing, and maintaining the server-side logic of web applications Implementing scalable and efficient server-side components and APIs Build React/Next.js based applications Working with relational and/or NoSQL databases to store and retrieve data efficiently Designing and optimizing database schemas for performance and scalability Integrating third-party APIs and web services to enhance application functionality Developing custom APIs to facilitate communication between front-end and back-end systems Implementing security best practices to protect against common web application vulnerabilities Conducting regular security audits and implement necessary measures Optimization: optimizing server-side code for maximum speed and scalability Monitoring and troubleshooting performance issues Collaborating with front-end developers, UI/UX designers, and other team members to ensure seamless integration of components Using version control systems (e.g., Git) to manage and track changes to the codebase Conducting thorough testing of server-side components to identify and fix bugs Collaborating with QA engineers for comprehensive testing Clear and comprehensive documentation for back-end systems and APIs Requirements: At least 4 years of experience in a similar position Proficiency in Java server-side programming Thorough understanding of React/Next.js core principles along with React router, hooks, Redux (or the like) workflows, Web performance and security Experience with database systems (e.g., MySQL, PostgreSQL, MongoDB) Proven experience in back-end development and building scalable web applications Strong analytical and problem-solving skills with attention to detail Effective communication skills to collaborate with cross-functional teams Ability to adapt to changing project requirements and technologies English at least B2 Nice to have: Familiarity with cloud platforms (e.g., AWS, Azure, GCP) Previous experience in Front-end development with Docker Experience with NodeJS Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Frontend Developer role focused on building and maintaining modern web applications using React.js. The position involves creating responsive, user-centered interfaces, integrating RESTful APIs, and delivering scalable, maintainable frontend solutions. Emphasis is placed on performance, accessibility, and clean code standards. 🗂️ Requirements: 3–4+ years commercial frontend development experience, Strong hands-on experience with React.js, Proficiency in modern JavaScript (ES6+), Solid knowledge of HTML5 and CSS3, Experience with responsive design principles, Experience integrating RESTful APIs, Understanding of UI/UX best practices, Familiarity with state management, Experience with component-based architecture, Experience with Git and collaborative workflows, Ability to write scalable and maintainable code, Strong debugging and problem-solving skills 📃 Skills: React, JavaScript, ES6, HTML5, CSS3, REST, API, Git, UI, UX 🏢 Description: Responsibilities Develop and maintain modern web applications using React.js . Create responsive and intuitive user interfaces with a strong focus on usability and user experience. Connect frontend applications with RESTful APIs and backend systems. Translate business and design requirements into scalable frontend solutions. Write clean, reusable, and maintainable code following frontend development standards. Collaborate closely with designers, product owners, and backend engineers. Optimize application performance, accessibility, and cross-browser compatibility. Requirements 3–4+ years of commercial experience in frontend development. Strong hands-on experience with React.js and modern JavaScript (ES6+). Solid knowledge of HTML5, CSS3, and responsive design principles. Experience integrating APIs and working with backend services. Understanding of UI/UX best practices and user-centered design. Familiarity with state management and component-based architecture. Experience with Git and collaborative development workflows. Ability to write efficient, scalable, and well-structured frontend code. Strong problem-solving and debugging skills.

🏢 Summary: Full Stack Developer role focused on building and evolving a Developer Experience Portal based on Backstage.io using Node.js and React. The position involves developing platform features, self-service automation workflows, reusable templates, and internal APIs while contributing to UX/UI design and engineering standards. The role combines backend, frontend, and platform engineering responsibilities. 🗂️ Requirements: Minimum 5 years of professional experience in full stack development, Strong hands-on experience with Node.js and modern backend development, Advanced knowledge of React and frontend architecture, Practical experience with Backstage.io including plugin development, Experience in UX/UI design with strong usability principles, Familiarity with YAML-based configuration, Understanding of Infrastructure as Code concepts 📃 Skills: Node.js, React, Backstage, YAML, IaC, APIs, UX, UI 🏢 Description: Responsibilities: Develop and enhance the Developer Experience Portal based on Backstage.io using Node.js and React Design and implement intuitive UX/UI solutions for both your own features and broader platform initiatives Build and maintain self-service automation workflows and reusable templates Develop and integrate platform APIs supporting internal engineering processes Contribute to the evolution of the platform tech stack and engineering standards Requirements: Minimum 5 years of professional experience in full stack development Strong hands-on experience with Node.js and modern backend development Advanced knowledge of React and frontend architecture Practical experience with Backstage.io , including plugin development Experience in UX/UI design with a good sense of usability and aesthetics Familiarity with YAML-based configuration and Infrastructure as Code concepts Fluency in English (both written and spoken) Nice to have: Experience with CI/CD pipelines and automation processes Knowledge of Docker and Kubernetes Experience with network segmentation and firewall automation, including Check Point with Ansible, NSX DFW with Terraform, and Google Cloud firewalling Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Senior Backend Developer role focused on designing and developing scalable backend applications using Node.js, NestJS, and TypeScript, with responsibility across the full software development lifecycle. The position involves database design and optimization, CI/CD automation, and ensuring high performance and code quality in collaboration with cross-functional teams. 🗂️ Requirements: 5+ years of commercial experience in backend development, 5+ years of experience with Node.js, 5+ years of experience with NestJS, 5+ years of experience with TypeScript, Strong experience with PostgreSQL or other relational databases, Experience with CI/CD pipelines, Experience with deployment automation tools, Hands-on experience across full software development lifecycle 📃 Skills: Node.js, NestJS, TypeScript, PostgreSQL, SQL, CI/CD, Ansible, Git 🏢 Description: Responsibilities: Design and develop backend applications using Node.js, NestJS, and TypeScript Participate in the full software development lifecycle (requirements analysis, development, code review, deployment, stabilization) Ensure performance, scalability, and code quality Automate deployment processes (CI/CD pipelines, Ansible) Work with PostgreSQL databases (data modeling, query optimization) Collaborate with frontend developers, DevOps, and business stakeholders Requirements: Commercial experience in backend application development Senior level: 5+ years of experience with Node.js, NestJS, and TypeScript Strong experience with PostgreSQL or other relational databases Experience with CI/CD pipelines and deployment automation tools (e.g., Ansible) Hands-on experience across the full software development lifecycle Strong ownership, problem-solving skills, and ability to work in a team environment

🏢 Summary: Backend-focused Node.js Developer role for building scalable IoT management systems, e-commerce platforms, and AI-based modules. The position involves full software development lifecycle participation with strong emphasis on AWS-based cloud architecture and API development. Opportunity to optionally expand into React/Next.js within an Agile international team. 🗂️ Requirements: 3-5 years commercial backend development experience, Strong proficiency in Node.js, Strong proficiency in TypeScript, Experience with Express, Practical experience with AWS services (EC2, Lambda, S3, SQS, SNS), Experience designing and developing APIs, Experience with MongoDB, Proficiency with Git, Knowledge of DevOps practices, Experience with CI/CD pipelines, English proficiency for daily communication 📃 Skills: Node.js, TypeScript, Express, AWS, S3, Lambda, EC2, SNS, SQS, MongoDB, Git, CICD, React, Next.js, Agile, Scrum 🏢 Description: Dla naszego klienta poszukujemy kandydatów na stanowisko: Node.js Developer with AWS Projekt: 🚀 Rozwój innowacyjnych systemów z obszaru IoT do zarządzania urządzeniami elektronicznymi w przestrzeniach komercyjnych, a także tworzenie platform e-commerce i zaawansowanych modułów bazujących na sztucznej inteligencji ( m.in . rozpoznawanie obrazu) oraz narzędzi automatyzujących procesy QA. Stack technologiczny: 💻 Backend (Główny focus): Node.js, TypeScript, Express, ekosystem AWS (S3, Lambda, EC2, SNS, SQS), MongoDB Frontend (Mile widziane / Do nauki): React.js, Next.js Narzędzia: Git, CI/CD Zespół: 👥 Międzynarodowe grono specjalistów (ok. 8-9 osób), budowane dla stabilnej firmy technologicznej z korzeniami w Niemczech. Współpraca opiera się na płaskiej strukturze i dużej otwartości, a w codziennej pracy wspierać Cię będą doświadczeni liderzy techniczni oraz eksperci front-end (od których będziesz mógł/mogła się uczyć, jeśli zechcesz rozwijać się w tym kierunku!). Metodyka pracy: 🔄 Agile / SCRUM Model współpracy: 🏢 Praca hybrydowa z biura w Warszawie (2 dni z biura, 3 dni pracy zdalnej) Stawka: 💰 do 15000 zł brutto miesięcznie (UoP) Zakres obowiązków: 🛠️ Aktywne uczestnictwo w pełnym cyklu powstawania oprogramowania, ze szczególnym uwzględnieniem warstwy backendowej – od fazy koncepcyjnej, przez architekturę, aż po wdrożenie i testowanie. Tworzenie, rozwój i utrzymanie skalowalnych rozwiązań serwerowych oraz API przy ścisłej współpracy z resztą międzynarodowego zespołu. Dla chętnych: Możliwość zaangażowania się w zadania frontendowe i płynna nauka technologii takich jak React czy Next.js w praktyce. Analiza wymagań, estymacja zadań oraz proponowanie nowych narzędzi lub bibliotek. Dbanie o najwyższą wydajność, niezawodność i jakość tworzonego kodu. Rozwiązywanie złożonych problemów inżynieryjnych. Przekładanie technicznych zawiłości na język zrozumiały dla nietechnicznych współpracowników. Oczekujemy: 🎯 Około 3-5 lat komercyjnego doświadczenia w tworzeniu oprogramowania ze szczególnym naciskiem na środowisko backendowe . Biegłości w pracy z technologiami: Node.js, TypeScript oraz Express . Praktycznego doświadczenia w korzystaniu z usług chmurowych AWS (w tym m.in . EC2, Lambda, SQS, S3). Umiejętności projektowania API oraz dobrej znajomości baz danych ( MongoDB ). Biegłości w korzystaniu z systemów kontroli wersji (Git) oraz znajomości praktyk DevOps i procesów CI/CD. Dobrej znajomości języka angielskiego (niezbędna do codziennej komunikacji w zespole). Samodzielności, umiejętności świetnej pracy zespołowej i dbałości o detale. 🌟 Mile widziane: Podstawowa znajomość technologii frontendowych (React.js, Next.js) LUB otwartość i chęć ich nauki w trakcie trwania projektu. Oferujemy: ✨ Przestrzeń do nauki Frontendu: Jeśli chcesz poszerzyć swoje kompetencje o React.js / Next.js, nasi eksperci z przyjemnością wdrożą Cię w te technologie. Zatrudnienie w oparciu o Umowę o Pracę. Prywatną opiekę medyczną (z opcją rozszerzenia pakietu dla bliskich). Dofinansowanie do zajęć sportowych oraz możliwość skorzystania z ubezpieczenia na życie. Kartę lunchową (zasilaną co miesiąc) po zakończeniu okresu próbnego. Elastyczne godziny rozpoczynania pracy (pomiędzy 8:00 a 10:00) i duże zrozumienie dla prywatnych spraw w ciągu dnia. Środowisko stawiające na "learning by doing" z szerokim dostępem do materiałów edukacyjnych i platform szkoleniowych (np. Udemy). Proces rekrutacyjny: 🤝 Rozmowa wprowadzająca: weryfikacja dopasowania do projektu oraz swobody komunikacji w języku angielskim. Wyzwanie techniczne (take-home assignment): praktyczne zadanie programistyczne (skupione głównie na Twoich umiejętnościach backendowych) do wykonania w dogodnym czasie (masz na to 7 dni). O nas Next Technology Professionals to wyspecjalizowana agencja rekrutacyjna i firma outsourcingowa o silnym profilu technologicznym. Od ponad 10 lat wspieramy firmy w budowie zespołów IT, AI, Cybersecurity, SAP oraz w rekrutacjach dla finansów, inżynierii i marketingu. Zrealizowaliśmy ponad 1000 skutecznych procesów rekrutacyjnych dla korporacji, scale-upów i dynamicznie rosnących startupów. Przesyłając swoje CV do Next Technology Professionals, trafiasz do starannie wyselekcjonowanej bazy kandydatów realizujących projekty dla wiodących globalnych organizacji. Pracujemy wyłącznie w oparciu o aktualne, konkretne potrzeby klientów. Jeśli Twój profil będzie odpowiadał jednemu z prowadzonych procesów, skontaktujemy się niezwłocznie.

🏢 Summary: Frontend-focused role developing and maintaining scalable React applications with TypeScript, integrated with Node.js backend services and data pipelines. The position involves building production-grade, data-driven solutions, contributing to architecture decisions, and optimizing complex UI workflows. It offers work on a high-impact product within a modern TypeScript and React ecosystem. 🗂️ Requirements: Strong proficiency in React, Strong proficiency in TypeScript, Experience building large-scale production applications, Experience with Node.js and API integrations, Experience with data-driven applications, Understanding of modern frontend architecture, Knowledge of testing practices, Ability to work in cross-functional teams 📃 Skills: React, TypeScript, Node.js, APIs, Microservices, Snowflake, Testing, Architecture, Data, Pipelines 🏢 Description: ✅ Your responsibilities: Develop and maintain scalable React applications with TypeScript across the full frontend stack Collaborate closely with backend engineers, data teams, and product managers to deliver high-quality solutions Ensure type safety, code quality, and maintainability throughout the application Participate in design and architecture discussions, proposing improvements to frontend patterns and integrations Troubleshoot and optimize complex UI and data-intensive workflows Support knowledge sharing and mentor junior developers when needed 🧠 Our requirements: Strong proficiency in React and TypeScript , with experience building large-scale, production-grade applications Familiarity with Node.js backend development and integration with APIs or microservices Experience working with data-driven applications , ideally with Snowflake, data lakes, or pipelines Solid understanding of modern frontend architecture, testing, and best practices Ability to communicate effectively in a cross-functional, high-stakes environment Proactive, self-motivated, and capable of delivering high-quality solutions under tight timelines 🌟 What we offer: Opportunity to work on a premium, high-profile product with global business impact Exposure to a modern TypeScript/React ecosystem, integrated with backend Node.js services and advanced data pipelines Collaborative environment with experienced engineers and product leaders Career growth and technical mentorship in a cross-functional team Competitive employment package and benefits.

🏢 Summary: The offer is for a Senior Frontend Developer responsible for building responsive user interfaces with React.js and rapidly prototyping new features with a strong focus on UX. The role involves close collaboration with product and design teams, integrating APIs and backend services, and applying modern CSS and JavaScript best practices. It emphasizes high-quality frontend development and effective use of design tools for wireframes and mockups. 🗂️ Requirements: 5+ years frontend development experience, Experience with React.js for responsive UI development, Ability to prototype features with UX focus, Experience integrating APIs and backend services, Strong knowledge of modern CSS, Strong knowledge of modern JavaScript, Experience collaborating with product and design teams, Experience using design tools for wireframes and mockups 📃 Skills: React, JavaScript, CSS, HTML, APIs, UX, Wireframing, Prototyping 🏢 Description: Tasks Build responsive user interfaces with React.js Rapidly prototype new features with a focus on UX design Collaborate with product and design teams to refine user experience Integrate APIs and backend services Apply modern CSS and JavaScript best practices Utilize design tools for wireframes and mockups Requirements At least 5 years of professional experience in frontend development Experience in building responsive user interfaces using React.js Ability to rapidly prototype new features with strong focus on UX design Experience in collaboration with product and design teams Knowledge of API and backend service integration Good understanding of modern CSS and JavaScript best practices Experience with design tools for creating wireframes and mockups Offer Multisport card Private healthcare Access to an e‑learning platform Group life insurance

🏢 Summary: Long-term international project for a Senior Node.js Developer with React focused on building and developing scalable web applications using modern technologies. The role involves backend and frontend development within a dynamic team environment. The project leverages cloud infrastructure and CDN solutions. 🗂️ Requirements: Strong knowledge of Node.js, Commercial experience with React.js, Knowledge of Next.js, Experience with AWS, Knowledge of CDN solutions, Experience with Heroku, Ability to build and develop scalable web applications 📃 Skills: Node.js, React, Next.js, AWS, CDN, Heroku 🏢 Description: Poszukujemy doświadczonego Senior Node.js Developera z React , który dołączy do długoterminowego projektu realizowanego w międzynarodowym środowisku. Jeśli dobrze odnajdujesz się w nowoczesnych technologiach, lubisz budować skalowalne aplikacje i pracować w dynamicznym zespole — zapraszamy do kontaktu. Wymagania Bardzo dobra znajomość Node.js Doświadczenie komercyjne z React.js Znajomość Next.js Doświadczenie w pracy z Amazon Web Services (AWS) Znajomość rozwiązań typu CDN Doświadczenie z Heroku Umiejętność tworzenia i rozwijania skalowalnych aplikacji webowych Dobra komunikacja i samodzielność w działaniu Mile widziane Doświadczenie w optymalizacji wydajności aplikacji Znajomość procesów CI/CD Doświadczenie z architekturą mikroserwisową lub systemami rozproszonymi

🏢 Summary: Senior Backend Engineer role focused on designing, building, deploying, and maintaining scalable backend systems using TypeScript and Node.js in a cloud environment. The position involves developing microservices on AWS, shaping system architecture across platforms, and ensuring production reliability for international users. Strong emphasis on clean architecture, testing, and infrastructure as code. 🗂️ Requirements: 5+ years backend development experience in production environments, Expert hands-on experience with TypeScript and Node.js, Strong knowledge of software engineering principles, testing, data structures, and algorithms, Experience designing and developing REST APIs, Experience with event-driven architecture, Experience building and maintaining microservices, Hands-on experience with AWS cloud services, Experience with Infrastructure as Code using Terraform, Experience with CI/CD pipelines and related tools, Strong knowledge of PostgreSQL and DynamoDB, Proficiency in OO design patterns, SOLID principles, and Clean Code, Computer Science degree, Experience working with Agile methodologies such as SCRUM or Kanban 📃 Skills: TypeScript, JavaScript, Node.js, AWS, Terraform, CircleCI, Docker, Datadog, PostgreSQL, DynamoDB, REST, CICD, Microservices, OOP, SOLID, Algorithms, DataStructures, SCRUM, Kanban 🏢 Description: About the role You will need to be an expert in backend development with a thorough understanding of the technologies involved. Strong backend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: Typescript, JavaScript, Node.js, REST APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in TypeScript, Node.js Deploying and maintaining microservices in AWS using Terraform Design software architecture between backend, frontend and mobile apps Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Recruiting and mentoring team members Collaborating with other team members and teams that depend on the functionalities that you develop Required qualifications: 5+ years of production software development experience in backend Strong understanding of software engineering principles, testing, data structures and algorithms Expert hands-on experience in technologies such as Typescript / Node.js Experience in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Terraform, CircleCI, Docker, Datadog, etc. Strong knowledge of DBMS like PostgreSQL, DynamoDB Expertise in REST APIs, Experience in event driven architecture Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree Experience working with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to frontend development in React Working experience with one of the object-oriented and/or functional languages such as C#, Python Java, Golang, Kotlin

🏢 Summary: Senior Frontend Developer role focused on designing, building, testing, deploying, and maintaining a React and TypeScript-based frontend system integrated with backend services and mobile apps. The position involves frontend architecture design, production support, and working within Agile teams to deliver scalable solutions used across multiple countries. 🗂️ Requirements: 5+ years of production experience with React, Strong hands-on experience with TypeScript, Strong understanding of software engineering principles, Experience with testing and design systems, Knowledge of REST APIs, Familiarity with DBMS such as PostgreSQL or DynamoDB, Degree in Computer Science, Experience working with Agile methodologies (SCRUM or Kanban), Experience using AI tooling 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, REST, PostgreSQL, DynamoDB, Testing, DesignSystems, Agile, SCRUM, Kanban, AI 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in React & TypeScript Design frontend software architecture with connection to backend services and mobile apps Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in React Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST APIs Familiarity with DBMS like PostgreSQL, DynamoDB Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.