Senior Fullstack Developer (Node.js & React)

🏢 Summary: Remote Developer role focused on building and enhancing a Developer Experience Portal based on Backstage.io using NodeJS and React. The position involves developing platform APIs, self-service automation, and UX/UI solutions within a technology platform environment. 🗂️ Requirements: Proficiency in NodeJS programming, Advanced knowledge of React, Experience with Backstage.io and plugin development, Experience in UX/UI design, Knowledge of YAML-based configuration (IaC) 📃 Skills: NodeJS, React, Backstage, YAML, IaC, APIs, UX, UI 🏢 Description: Poszukujemy doświadczonego Developera do zespołu Developer Experience Portal, który będzie pracował z technologiami NodeJS i React w oparciu o backstage.io. Praca odbywa się w trybie zdalnym z okazjonalnymi wizytami w biurze w Warszawie. Obowiązki: Rozwój portalu Developer Experience opartego na backstage.io wykorzystującego NodeJS i React Tworzenie projektów UX/UI dla własnych zadań oraz wsparcie innych developerów Rozwój automatyzacji Self-Service i szablonów Tworzenie platformowych API Rozwój platformy technologicznej (Tech Stack Platform) Wymagania: Umiejętność programowania w NodeJS Zaawansowana znajomość Reacta Znajomość backstage.io wraz z tworzeniem pluginów Doświadczenie w projektowaniu UX/UI i dobre wyczucie estetyki Znajomość konfiguracji opartej na YAML (IaC) Mile widziane: Doświadczenie z pipeline’ami CI/CD oraz automatyzacją Znajomość Dockera i Kubernetesa Doświadczenie z automatyzacją segmentacji sieci (fizyczne firewalle - Check Point, Ansible; wirtualne firewalle - NSX DFW, Terraform; firewalle w Google Cloud) Oferujemy: Pracę zdalną z okazjonalnymi wizytami w biurze w centrum Warszawy Karta sportowa Prywatne ubezpieczenie zdrowotne Jeśli jesteś osobą, która szuka wyzwań w rozwijającym się zespole i ma doświadczenie w wymienionych technologiach, zachęcamy do aplikowania!

🏢 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: 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: 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: Full-stack development role focused on building and maintaining backend services in Node.js and frontend applications in React.js with Next.js. The position involves designing cloud-based solutions on AWS, integrating CDN services, and managing deployments on Heroku. 🗂️ Requirements: Strong hands-on experience with Node.js, Solid experience with React.js, Practical experience with Next.js, Experience with AWS, Experience with CDN solutions, Experience with Heroku, Very good English proficiency 📃 Skills: Node.js, React.js, Next.js, AWS, CDN, Heroku, JavaScript 🏢 Description: Responsibilities: Develop and maintain backend solutions using Node.js Build and develop frontend components using React.js Work with Next.js for server‑side rendering and frontend architecture Design and integrate solutions deployed on cloud platforms, primarily AWS Work with CDN solutions to support application delivery and performance Support application deployment and hosting on Heroku Collaborate within the development team to deliver end‑to‑end functionality Requirements: Strong hands‑on experience with Node.js Solid frontend development experience with React.js Practical experience with Next.js Experience working with Amazon Web Services (AWS) Experience using CDN solutions Experience with Heroku as an application hosting platform Very good command of English, both spoken and written Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 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: 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: Backend engineering role focused on building scalable backend services, APIs, and internal developer platforms in a fully remote environment. The position involves improving system architecture, optimizing distributed systems, and collaborating across the full software development lifecycle. The offer includes influence on technical decisions, modern technologies, and growth opportunities within an experienced engineering team. 🗂️ Requirements: 5+ years of backend software development experience, Proficiency in PHP or experience with Java, Python, Go, Knowledge of RESTful APIs and GraphQL, Experience building scalable distributed backend systems, Experience with SQL/MySQL and database optimization, Experience with automated testing and monitoring, Knowledge of debugging production systems, Familiarity with contract-driven development, English for daily technical communication 📃 Skills: PHP, Java, Python, Go, REST, GraphQL, SQL, MySQL, React, API 🏢 Description: ✅ Your responsibilities: ・Design, develop, and maintain scalable backend services and APIs for third-party integrations. Improve platform architecture, service communication, and internal developer tooling. Collaborate with Product Managers, Designers, and Engineers throughout the entire software development lifecycle. Optimize existing systems for performance, scalability, reliability, and maintainability. Drive engineering best practices, including code quality, testing, and documentation. Participate in architecture discussions and technical decision-making. Mentor engineers through code reviews, pair programming, and knowledge sharing. Continuously improve the developer experience by building reliable internal platforms and tools. 🧠 Our requirements: 5+ years of experience in backend software development. Strong proficiency in PHP (preferred) or solid experience with Java, Python, Go , or similar backend technologies. Strong understanding of RESTful APIs , GraphQL , and API design best practices. Experience designing and building scalable, distributed backend systems. Hands-on experience with SQL/MySQL databases and database optimization. Experience with automated testing, observability, monitoring, and debugging production systems. Familiarity with contract-driven development and modern software development practices. Basic knowledge of frontend technologies such as React is a plus. Strong communication skills and the ability to collaborate across cross-functional teams. Passion for writing clean, maintainable, and high-quality code or AI automation English at a level allowing daily technical communication 🌟 What we offer: 100% remote work. Private healthcare and Multisport. Life insurance. Real influence on technical decisions and system architecture. Opportunity to build scalable backend services and developer platforms. Work with modern technologies in a collaborative engineering environment. Knowledge sharing, mentorship, and professional growth opportunities. Friendly, supportive, and experienced engineering team.

🏢 Summary: Development of a new React-based microservice acting as a common UI layer for multiple applications, with responsibility for authentication, authorization, and configurable UI components. The role involves building reusable components, integrating APIs, and following best practices and documentation standards. 🗂️ Requirements: 5+ years of experience with React.js, Strong knowledge of modern JavaScript (ES6+), Proficiency with React Hooks, Experience with Redux or other state management libraries, Experience with Material-UI, Ant Design, or Tailwind CSS, Strong understanding of HTML5, Strong understanding of CSS3, Experience with responsive design, Familiarity with TypeScript, Experience with Webpack, Experience with Babel, Experience with RESTful APIs or GraphQL, Experience with Jest, Experience with React Testing Library 📃 Skills: React, JavaScript, ES6, Redux, Hooks, Material-UI, AntDesign, Tailwind, HTML5, CSS3, TypeScript, Webpack, Babel, REST, GraphQL, Jest, TestingLibrary 🏢 Description: Responsibilities: Design ground up new microservice based on React. This microservice acts as a common UI for various applications. Handle authentication , authorization with help of backend services. Also support design related tasks or work in collaboration with UI designer. Design reusable components and make UI configurable so certain screens are visible and not visible based on cofiguration. Implement clear documentation and employe industry standard best practices. Expectations: At least 5+ years of experience with React.js and having knowledge of modern JavaScript (ES6+) Proficiency in React Hooks, Redux or state management libraries Experience with UI frameworks like Material-UI, Ant Design, or Tailwind CSS Strong understanding of HTML5, CSS3, and responsive design Familiarity with TypeScript and modern development tools (Webpack, Babel) Experience with API integration (RESTful APIs or GraphQL) Knowledge of unit testing frameworks (Jest, React Testing Library)

🏢 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.