Senior Node Developer

🏢 Summary: B2B contract role for a Mid/Senior Node.js Developer focused on building and maintaining backend systems such as SaaS platforms, cloud-native applications, microservices, and event-driven architectures. The position involves architectural decision-making, backend development, and close collaboration with QA and DevOps in international projects. Candidates will work with modern cloud environments and have real impact on system design and product development. 🗂️ Requirements: 4+ years of backend development experience, Strong knowledge of Node.js, Experience with TypeScript or JavaScript, Experience with SQL databases, Experience with NoSQL databases, Understanding of microservices architecture, Understanding of serverless architecture, Understanding of event-driven systems, Hands-on experience with GCP, AWS, or Azure, Ability to write clean and maintainable code, Experience with unit and integration testing, English level minimum B2 📃 Skills: Node.js, TypeScript, JavaScript, SQL, NoSQL, GCP, AWS, Azure, REST, Docker, Microservices, Serverless, Testing 🏢 Description: We are a software house delivering long-term projects for international clients , and we are looking for Mid / Senior Node.js Developers to join our team on a B2B contract . You will work on various backend-focused projects , such as SaaS platforms, cloud-native systems, microservices, and event-driven architectures. We match projects to your experience and technical preferences, and you will have a real impact on architecture and product development. Responsibilities design, develop, and maintain backend services using Node.js (TypeScript / JavaScript) implement new features and improve existing functionalities participate in technical and architectural decision-making refactor and optimize key components of the system ensure code quality through clean code practices and testing collaborate closely with developers, QA, and DevOps engineers Requirements 4+ years of experience in backend development strong knowledge of Node.js (TypeScript / JavaScript) experience with SQL and NoSQL databases good understanding of cloud-based architectures (microservices, serverless, event-driven systems) hands-on experience with at least one cloud provider ( GCP, AWS, or Azure ) ability to write clean, well-structured, and maintainable code proactive mindset and willingness to grow technically good communication skills and English level min. B2B Example Tech Stack (depends on the project) Node.js / TypeScript Cloud platforms: GCP, Azure or AWS REST APIs & asynchronous communication SQL & NoSQL databases Docker Unit and integration testing

🏢 Summary: Backend Developer role focused on modernizing and transforming legacy sales systems using Node.js and .NET technologies. The position involves building and maintaining APIs, developing databases, and contributing to an event-driven architecture in an AWS-based environment. The role combines hands-on backend development with active participation in deployment processes and system evolution. 🗂️ Requirements: 5-6 years of recent Node.js development experience, 2-3 years of recent .NET development experience, Experience building and maintaining APIs, Experience with PostgreSQL and DynamoDB databases, Experience working with event-driven architecture, Experience with AWS services, Ability to write modern, testable, high-quality code, Experience with deployment automation and CI/CD pipelines 📃 Skills: Node.js, TypeScript, JavaScript, .NET, AWS, Lambda, DynamoDB, RDS, ECS, CDK, PostgreSQL, Kafka, EventBridge, GitLab, CI, Docker, Localstack 🏢 Description: We're seeking an experienced & energetic Backend Developer specializing in TypeScript/JavaScript/.NET to enhance the global Sales ecosystem. This role focuses on transforming backend systems, emphasizing proactive development and team empowerment. Candidates should bring a blend of Node.js and .NET expertise to the table, along with a collaborative spirit and a commitment to writing modern, testable code. Our Client’s team, comprising about 25 individuals, is modernizing legacy systems to fulfill local market needs while improving our processes continually. If you're motivated by challenges and have a passion for creating high-value solutions, we want to hear from you! What we offer: Rate: 40-45 euro/h +VAT Remote role B2B Contract Main Responsibilities: Drive initiatives and collaborate with team members on larger projects. Fix bugs and implement smaller enhancements across the application. Participate in creating and maintaining APIs using AWS services. Develop and improve databases with a focus on PostgreSQL and DynamoDB. Contribute to an event-driven architecture utilizing Kafka and AWS EventBridge. Manage deployment processes using AWS CDK and GitLab CI. Support legacy system maintenance and modernization. Key Requirements: At least 5-6 years of recent experience as a Node.js Developer. 2-3 years of recent experience with .NET. Energetic and inspiring personality who thrives on challenges. Hands-on work ethic in collaboration with team members. Proficiency in writing modern, testable, and high-quality code. Natural inclination towards evolutive maintenance. Nice to Have: AWS experience (Serverless Lambda, DynamoDB, RDS, ECS, AWS CDK). Knowledge of Localstack. Experience with Docker. Other Details: This position allows for team activities at least twice per year in Sweden, with a focus on modernizing our legacy systems into proactive, quality-focused solutions. Join a team of about 25 members dedicated to driving transformative change in our sales ecosystem.

🏢 Summary: The offer is for an experienced Node.js Engineer to design, build, and scale backend services for a modern data-driven platform. The role involves developing REST/GraphQL APIs, contributing to system architecture, and owning the full development lifecycle in an Agile environment. The position requires close collaboration with cross-functional teams and active participation in technical decision-making. 🗂️ Requirements: 5+ years of experience with JavaScript and Node.js, Strong proficiency in TypeScript, Experience designing and building REST or GraphQL APIs, Knowledge of relational and NoSQL databases, Experience with AWS services, Understanding of software architecture and scalable systems, Experience with Express or Next.js frameworks, Knowledge of web fundamentals and security best practices, Fluent English (B2+), Availability overlapping with US Eastern Time core hours 📃 Skills: JavaScript, Node.js, TypeScript, REST, GraphQL, MySQL, MongoDB, Redis, AWS, EC2, Lambda, SQS, Express, Next.js, CORS, OWASP, Scrum 🏢 Description: We are looking for an experienced Node.js Engineer to join a team building and scaling a modern data-driven platform. ✅ Your responsibilities: Design, build, and maintain backend services using Node.js Develop scalable APIs (REST / GraphQL) Contribute to system architecture, performance, and scalability improvements Own the full development lifecycle: implementation, testing, deployment, and maintenance Collaborate closely with product, frontend, and DevOps teams in an Agile (Scrum) environment Participate in technical decision-making and drive best practices 🧠 Our requirements: 5+ years of experience with JavaScript / Node.js Strong proficiency in TypeScript Hands-on experience designing and building RESTful and/or GraphQL APIs Solid understanding of databases (relational and NoSQL, e.g., MySQL, MongoDB, Redis) Experience with AWS (e.g., EC2, Lambda, SQS) Good understanding of software architecture and scalable systems Experience with frameworks such as Express or Next.js Knowledge of web fundamentals (e.g., CORS) and security best practices (OWASP) Ability to work independently and support team-level technical decisions Fluent English (B2+) Availability overlapping with US Eastern Time core hours 🌟 What we offer: Remote work Flexible cooperation model (B2B / employment contract) Opportunity to work on a scalable, data-focused platform Collaboration with a highly skilled engineering team Real impact on technical decisions and system architecture

🏢 Summary: Senior Backend Node.js Developer role focused on building and scaling an event-driven microservices trading platform. The position involves end-to-end development within a distributed architecture, ensuring high performance, scalability, and code quality. Fully remote B2B contract with overlap with NYC hours. 🗂️ Requirements: 4+ years web application development experience, Expert knowledge of Node.js, Expert knowledge of TypeScript, Experience with distributed systems architecture, Experience with Apache Kafka, Experience with Redis, Experience with Kubernetes, Experience with MongoDB, Experience with automated unit testing and TDD, Strong understanding of performance optimization and computational complexity, Knowledge of algorithms and design patterns, Broad knowledge of web technologies 📃 Skills: Node.js, TypeScript, Kafka, Redis, Kubernetes, MongoDB, Microservices, TDD, Algorithms, DesignPatterns, Web 🏢 Description: We are looking for a performance-driven backend Senior Node.js Developer who can help us bring our client's trading solutions to the next level of functionality, scalability, and user experience. They are actively developing a new event-driven microservices architecture to form a foundational platform for delivering new trading applications. You will be responsible for delivering software end-to-end , from liaising with product managers and designers, to coordinating across international development teams on engineering and architecture to working with QA and DevOps teams - all ultimately to deliver a quality, innovative product to the traders and investors who depend on the platform every day. Requirements: Fluent English language [both written and spoken] Education: at least Bachelor's Degree, preferably in Computer Science 4+ years' professional web application development experience Expert-level Node.js and TypeScript knowledge, and curiosity to learn more Broad knowledge of web platform and technologies Superior analytical and problem-solving ability Effective communication skills to work with different teams across an international company Experience with modern distributed systems and infrastructure technologies, including Apache Kafka, Redis, Kubernetes, and MongoDB Automated unit testing and test-driven development Robust understanding of performance issues, computational complexity, and code optimization. Familiarity and implementation of industry-standard algorithms and design patterns Proactive and team player who can deliver in a high-pressure demanding environment Nest.js – nice to have Offer details: 100% remote job preferrably at least 4-5 hours overlap with NYC working hours B2B contract rate up to 55 USD/h net

🏢 Summary: Senior Full Stack Developer role for an international product team focused on building scalable applications using TypeScript, React, Node.js, PostgreSQL, and Kafka. The contract is remote, B2B, initially for 6 months with possible extension, and includes collaboration in an agile international environment with AI-powered development tools. 🗂️ Requirements: 8+ years of commercial software development experience, Strong TypeScript experience, Experience with React, Experience with Node.js, Experience with NestJS, Knowledge of PostgreSQL, Knowledge of REST APIs, Knowledge of Kafka, Experience building scalable systems, Daily use of AI coding tools, English level B2+/C1 📃 Skills: TypeScript, React, Node.js, NestJS, PostgreSQL, REST, Kafka, Claude, Cursor, Codex, Copilot 🏢 Description: co.brick talents — powered by AI, powered by people. Senior Full Stack Developer (TypeScript / React / Node.js) Location: Remote Contract: B2B Rate: Up to 150–160 PLN/hour Duration: 6 months with a strong possibility of extension Start: ASAP About the project We are looking for an experienced Senior Full Stack Developer to join an international product development team. You will work on building and enhancing scalable software solutions in a modern technology stack, collaborating with experienced engineers in an agile environment. Your responsibilities Design, develop, and maintain scalable full stack applications. Build high-quality backend services and modern frontend solutions. Develop and integrate REST APIs. Work with PostgreSQL and Kafka-based architectures. Collaborate with cross-functional, international teams. Apply AI-powered coding tools to improve development efficiency and code quality. Requirements 8+ years of commercial software development experience. Strong experience with TypeScript on both the frontend and backend. Hands-on experience with React and Node.js/NestJS . Solid knowledge of PostgreSQL , REST APIs , and Kafka . Experience designing and building scalable systems or software products. Daily use of AI coding tools such as Claude Code, Cursor, Codex, GitHub Copilot , or similar ( must have ). Very good English communication skills ( B2+/C1 , must have ). Nice to have Experience building SaaS products. Experience developing on-premise software solutions. Recruitment process The recruitment process includes a technical assignment (approximately 5 hours) . During the task, you are welcome and encouraged to use AI coding tools , as we value modern software development practices.

🏢 Summary: Remote Senior Backend Node.js Developer role focused on building and scaling an event-driven microservices trading platform. The position involves end-to-end development, collaborating across product, QA, and DevOps to deliver high-performance, scalable trading solutions. B2B contract with overlap required with NYC working hours. 🗂️ Requirements: Bachelor’s Degree in Computer Science or related field, 3-5 years professional web application development experience, Expert-level Node.js knowledge, Expert-level TypeScript knowledge, Experience with distributed systems, Experience with Apache Kafka, Redis, Kubernetes, MongoDB, Experience with automated unit testing and TDD, Strong understanding of performance optimization and computational complexity, Knowledge of algorithms and design patterns, Fluent English (written and spoken) 📃 Skills: Node.js, TypeScript, Kafka, Redis, Kubernetes, MongoDB, Microservices, TDD, Algorithms, DesignPatterns, Web, DistributedSystems 🏢 Description: We are looking for a performance-driven backend Senior Node.js Developer who can help us bring our client's trading solutions to the next level of functionality, scalability, and user experience. They are actively developing a new event-driven microservices architecture to form a foundational platform for delivering new trading applications. You will be responsible for delivering software end-to-end , from liaising with product managers and designers, to coordinating across international development teams on engineering and architecture to working with QA and DevOps teams - all ultimately to deliver a quality, innovative product to the traders and investors who depend on the platform every day. Requirements: Fluent English language [both written and spoken] Education: at least Bachelor's Degree, preferably in Computer Science 3-5 years' professional web application development experience Expert-level Node.js and TypeScript knowledge, and curiosity to learn more Broad knowledge of web platform and technologies Superior analytical and problem-solving ability Effective communication skills to work with different teams across an international company Experience with modern distributed systems and infrastructure technologies, including Apache Kafka, Redis, Kubernetes, and MongoDB Automated unit testing and test-driven development Robust understanding of performance issues, computational complexity, and code optimization. Familiarity and implementation of industry-standard algorithms and design patterns Proactive and team player who can deliver in a high-pressure demanding environment Nest.js – nice to have Offer details: 100% remote job preferrably at least 4-5 hours overlap with NYC working hours B2B contract rate up to 50 USD/h net Don't hesitate and apply now!

🏢 Summary: Senior Node.js Developer role focused on building and scaling the backend API layer of an IoT platform for monitoring and optimizing energy usage in buildings. The position involves developing distributed backend systems using TypeScript, Node.js, and Kubernetes, and integrating with IoT devices and analytics modules. The role requires delivering high‑performance, scalable solutions in a cloud-based environment. 🗂️ Requirements: Minimum 5 years of commercial backend development experience, Strong knowledge of Node.js, Strong knowledge of TypeScript, Understanding of distributed systems, Experience with scalable backend design, Experience with containerized or cloud environments, Experience with Kubernetes, Ability to work in Agile environment, Fluency in English, Residing in Poland 📃 Skills: Node.js, TypeScript, Kubernetes, IoT, APIs, Backend, Cloud, DistributedSystems, Agile 🏢 Description: We are looking for a Senior Node.js Developer to join a project for a leading global energy‑tech company. You will help build an intelligent platform used to monitor and optimize energy usage in buildings. The work combines backend development, IoT integration, and modern cloud technologies. Your tasks Develop backend applications that provide the API layer of the IoT platform using TypeScript and Node.js Build and maintain backend services supporting mobile and web solutions Use Node.js, TypeScript, and Kubernetes to deliver reliable and scalable systems Integrate backend features with IoT devices, analytics modules, and other platform components Ensure high performance, clean architecture, and smooth cooperation with other teams Requirements Minimum 5 years of commercial experience in backend development Strong knowledge of Node.js and TypeScript Understanding of distributed systems and scalable backend design Experience with containerized or cloud‑based environments (e.g., Kubernetes) Ability to work in an Agile environment and deliver high‑quality code Fluency in English Residing in Poland required

🏢 Summary: B2B Node.js Developer role (Mid/Senior) focused on building and maintaining web applications and digital tools for social and civic tech projects. The position involves developing APIs, integrating systems, managing databases, and automating reporting and operational processes. Hybrid work from Warsaw office with rate depending on experience level. 🗂️ Requirements: Commercial experience with Node.js, Strong knowledge of JavaScript or TypeScript, Experience with REST API and system integrations, Experience with SQL or NoSQL databases 📃 Skills: Node.js, JavaScript, TypeScript, REST, SQL, NoSQL, APIs 🏢 Description: Obecnie poszukujemy Node.js Developera do wsparcia projektów społecznych i civic tech poprzez rozwój nowoczesnych narzędzi cyfrowych wspierających działania mieszkańców oraz zespołów projektowych. Stawka MID: 110 - 130 zł netto + VAT za godzinę na B2B Stawka SENIOR: 130 - 160 zł netto + VAT za godzinę na B2B Praca hybrydowa z biura w Warszawie, ilość dni do doprecyzowania z managerem zespołu Zakres obowiązków tworzenie i rozwój aplikacji webowych w środowisku Node.js, projektowanie oraz integracja API, rozwój i utrzymanie baz danych, budowanie formularzy oraz narzędzi online, integracja systemów i narzędzi cyfrowych, automatyzacja procesów raportowych i operacyjnych, wsparcie techniczne zespołów projektowych, przygotowywanie dokumentacji technicznej, udział w konsultacjach technologicznych dla projektów społecznych, współpraca z zespołami projektowymi, analitycznymi i UX. Wymagania doświadczenie komercyjne w programowaniu z wykorzystaniem Node.js, dobra znajomość JavaScript/TypeScript, znajomość REST API oraz integracji systemowych, doświadczenie w pracy z bazami danych (SQL lub NoSQL), znajomość technologii webowych (mile widziany React), umiejętność samodzielnego rozwiązywania problemów, dobra organizacja pracy i komunikacja zespołowa. Mile widziane doświadczenie w projektach civic tech / gov tech, doświadczenie przy projektach społecznych lub publicznych, znajomość narzędzi no-code / low-code, znajomość standardów dostępności WCAG, doświadczenie z automatyzacją procesów, znajomość języka angielskiego.

🏢 Summary: Remote B2B opportunity for a Senior Fullstack Developer focused on building scalable web applications using React, TypeScript, Node.js, and AWS services. The role includes frontend and backend development, microservices architecture, cloud integrations, and technical decision-making in an international environment. 🗂️ Requirements: Minimum 5 years of experience in web application development, Strong knowledge of Node.js, Strong knowledge of React, Strong knowledge of TypeScript, Practical experience with AWS services, Knowledge of PostgreSQL, Experience with microservices architecture or cloud-based solutions, Knowledge of Clean Code principles and design patterns, Experience with Git, Very good English skills 📃 Skills: Node.js, React, TypeScript, AWS, ECS, Lambda, S3, DynamoDB, SQS, SES, PostgreSQL, Git 🏢 Description: Informacje o projekcie: Branża: IT Stawka: do 175 zł/h netto + VAT, B2B Lokalizacja: zdalnie Język projektu: angielski, polski Zakres obowiązków: Projektowanie i rozwój skalowalnych rozwiązań webowych. Tworzenie oraz rozwijanie aplikacji frontendowych w oparciu o React i TypeScript . Implementacja i rozwój usług backendowych z wykorzystaniem Node.js oraz TypeScript . Integracja aplikacji z usługami AWS, w szczególności: ECS, Lambda, S3, DynamoDB, SQS, SES. Projektowanie i optymalizacja architektury systemów. Współpraca przy podejmowaniu decyzji technicznych oraz wyborze najlepszych rozwiązań technologicznych. Optymalizacja wydajności, bezpieczeństwa oraz jakości tworzonych rozwiązań. Udział w code review oraz wsparcie zespołu w utrzymaniu wysokich standardów programistycznych. Współpraca z zespołami produktowymi i biznesowymi przy realizacji nowych funkcjonalności. Wymagania: Minimum 5 lat doświadczenia w rozwoju aplikacji webowych. Bardzo dobra znajomość: Node.js, React, TypeScript Praktyczne doświadczenie w pracy z usługami AWS . Dobra znajomość baz danych PostgreSQL . Doświadczenie w projektowaniu i rozwijaniu architektury mikroserwisowej lub rozwiązań opartych o usługi chmurowe. Znajomość dobrych praktyk programistycznych, wzorców projektowych oraz zasad Clean Code. Doświadczenie w pracy z systemami kontroli wersji (Git). Umiejętność analitycznego myślenia oraz samodzielnego rozwiązywania problemów. Bardzo dobra znajomość języka angielskiego umożliwiająca pracę w międzynarodowym środowisku.

🏢 Summary: Remote B2B opportunity for an experienced Fullstack Developer focused on building scalable web applications using React, TypeScript, Node.js, and AWS services. The role includes frontend and backend development, cloud integrations, system architecture optimization, and collaboration on technical decisions in an international environment. 🗂️ Requirements: Minimum 5 years of experience in web application development, Strong knowledge of Node.js, Strong knowledge of React, Strong knowledge of TypeScript, Practical experience with AWS services, Knowledge of PostgreSQL, Experience with microservices or cloud-based architectures, Knowledge of Clean Code and design patterns, Experience with Git, Very good English communication skills 📃 Skills: Node.js, React, TypeScript, AWS, ECS, Lambda, S3, DynamoDB, SQS, SES, PostgreSQL, Git 🏢 Description: Informacje o projekcie: Branża: IT Stawka: do 175 zł/h netto + VAT, B2B Lokalizacja: zdalnie Język projektu: angielski, polski Zakres obowiązków: Projektowanie i rozwój skalowalnych rozwiązań webowych. Tworzenie oraz rozwijanie aplikacji frontendowych w oparciu o React i TypeScript . Implementacja i rozwój usług backendowych z wykorzystaniem Node.js oraz TypeScript . Integracja aplikacji z usługami AWS, w szczególności: ECS, Lambda, S3, DynamoDB, SQS, SES. Projektowanie i optymalizacja architektury systemów. Współpraca przy podejmowaniu decyzji technicznych oraz wyborze najlepszych rozwiązań technologicznych. Optymalizacja wydajności, bezpieczeństwa oraz jakości tworzonych rozwiązań. Udział w code review oraz wsparcie zespołu w utrzymaniu wysokich standardów programistycznych. Współpraca z zespołami produktowymi i biznesowymi przy realizacji nowych funkcjonalności. Wymagania: Minimum 5 lat doświadczenia w rozwoju aplikacji webowych. Bardzo dobra znajomość: Node.js, React, TypeScript Praktyczne doświadczenie w pracy z usługami AWS . Dobra znajomość baz danych PostgreSQL . Doświadczenie w projektowaniu i rozwijaniu architektury mikroserwisowej lub rozwiązań opartych o usługi chmurowe. Znajomość dobrych praktyk programistycznych, wzorców projektowych oraz zasad Clean Code. Doświadczenie w pracy z systemami kontroli wersji (Git). Umiejętność analitycznego myślenia oraz samodzielnego rozwiązywania problemów. Bardzo dobra znajomość języka angielskiego umożliwiająca pracę w międzynarodowym środowisku.