Backend Developer (Node.js) – Integration & Backend Team

🏢 Summary: Senior Backend Developer role focused on developing and optimizing a key internal system using NestJS, Node.js, and TypeScript. The position involves full software development lifecycle ownership and automation of CI/CD processes. Strong emphasis on testing, database management, and deployment automation. 🗂️ Requirements: 7+ years commercial backend development experience, 5+ years experience with NestJS, Node.js, TypeScript, Experience in full software development lifecycle, Experience with CI/CD and GitHub Actions, Proficiency with PostgreSQL, Experience with TypeORM, Docker, Jest, Ability to write integration and E2E tests, Knowledge of coding best practices 📃 Skills: NestJS, Node.js, TypeScript, CI/CD, GitHub, PostgreSQL, TypeORM, Docker, Jest, RabbitMQ, Sentry, Zod, class-validator, Testcontainers, OpenAPI, Swagger 🏢 Description: Szukamy Backend Developera , który pomoże nam rozwijać i optymalizować kluczowy system wewnętrzny firmy. Jeśli masz silne doświadczenie w NestJS, Node.js i TypeScript , a do tego dobrze odnajdujesz się w środowisku CI/CD i automatyzacji wdrożeń, to jesteś osobą, której szukamy! ✅ Wymagania 🔹 Senior 7+ lat doświadczenia w komercyjnym tworzeniu aplikacji backendowych 🔹 Senior 5+ lat pracy z NestJS, TypeScript i Node.js 🔹 Doświadczenie w pełnym cyklu wytwarzania oprogramowania – od planowania po stabilizację po wdrożeniu 🔹 Doświadczenie w automatyzacji procesów wdrożeniowych (Github Actions, CI/CD) 🔹 Biegłość w pracy z bazami danych PostgreSQL 🔹 Znajomość TypeORM, Docker i Jest 🔹 Umiejętność pisania testów integracyjnych oraz testów E2E 🔹 Znajomość dobrych praktyk kodowania i umiejętność pracy zespołowej 🌟 Mile widziane 🔸 Doświadczenie z RabbitMQ lub innymi systemami kolejkowania wiadomości 🔸 Znajomość narzędzi monitoringu i error tracking (np. Sentry) 🔸 Doświadczenie z walidacją danych (Zod, class-validator) 🔸 Znajomość Testcontainers lub podobnych narzędzi do testów integracyjnych 🔸 Doświadczenie z OpenAPI/Swagger

🏢 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: Opportunity for a confirmed Backend Developer to design and build microservices-based applications using Node.js and NestJS, with a strong focus on GraphQL/REST APIs and AWS cloud deployment. The role involves data optimization, containerization with Docker, and participation in CI/CD pipelines. Ideal for an experienced backend engineer working in distributed and event-driven architectures. 🗂️ Requirements: 4–7 years backend development experience, Strong experience with Node.js and NestJS, Experience designing GraphQL and REST APIs, Experience with microservices architectures, Knowledge of distributed architectures, Experience with AWS cloud environment, Proficiency with SQL and NoSQL databases, Experience with Docker containerization, Experience with CI/CD pipelines, Operational English 📃 Skills: Node.js, NestJS, GraphQL, REST, Apollo, Docker, AWS, Lambda, TypeScript, SQL, NoSQL, Jest, TDD, E2E, OOP, SOLID, CI/CD, Microservices 🏢 Description: Introduction & Résumé : Emagine recherche pour un de ses clients, un Backend développeur Node.js / NestJS (Confirmé) . Vos missions : Développer des services backend en Node.js et NestJS. Concevoir et maintenir des APIs GraphQL et REST. Participer à la conception d’architectures microservices. Appliquer les bonnes pratiques de développement. Concevoir et optimiser l’accès aux données. Déployer les applications sur AWS. Utiliser Docker pour la conteneurisation. Participer aux pipelines CI/CD. Votre profil : Anglais opérationnel. 4 à 7 ans d’expérience en développement backend. Expérience dans des environnements cloud et microservices. Connaissance des architectures distribuées. Environnement: NestJS (v11), Node (v22), GraphQL (Apollo), Docker, Typescript ; TDD, E2E (Jest), OOP, SOLID, Clean Architecture, Anglais courant. APIs integration (GraphQL / REST); Maîtrise des bases de données (SQL/NoSQL); Familiar with microservice and event driven architecture, AWS ecosystem (Lambdas)

🏢 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: 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 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: Backend Developer role focused on modernizing and transforming legacy sales systems using Node.js and .NET technologies. The position involves building and maintaining APIs, databases, and event-driven architectures within AWS, while supporting deployment and continuous improvement processes. The role emphasizes proactive development, high-quality testable code, and collaboration on large-scale backend initiatives. 🗂️ Requirements: 5-6 years experience with Node.js, 2-3 years experience with .NET, Strong proficiency in TypeScript and JavaScript, Experience building and maintaining APIs, Experience with PostgreSQL and DynamoDB, Experience with event-driven architecture, Experience with AWS services, Ability to write modern, testable, high-quality code, Experience with CI/CD pipelines, Experience maintaining and modernizing legacy systems 📃 Skills: Node.js, TypeScript, JavaScript, .NET, AWS, Lambda, DynamoDB, PostgreSQL, RDS, ECS, Kafka, EventBridge, CDK, 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! 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 experience as a Node.js Developer. 2-3 years of 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: Remote Back-End Software Engineer role focused on building and scaling enterprise backend services, REST APIs, and integrations using Node.js and NestJS. The position involves cloud infrastructure provisioning, Kubernetes orchestration, and AWS-based deployments within Agile Scrum teams. Candidates will work on secure, scalable backend systems integrating with enterprise platforms and headless CMS solutions. 🗂️ Requirements: 5+ years professional software engineering experience, Backend development with Node.js, Backend development with NestJS, Experience building REST APIs, Kubernetes orchestration, Docker containerization, Helm configuration, Infrastructure as code with Terraform, AWS cloud deployment experience, Enterprise application development, Experience with large-scale business-critical applications, Third-party system integration, Ability to work independently, Strong written and verbal communication, Stakeholder communication skills, Agile Scrum collaboration, Problem-solving skills 📃 Skills: Node.js, NestJS, REST, Kubernetes, Docker, Helm, Terraform, AWS, GitOps, CI/CD, EKS, ArgoCD, Salesforce, Netcracker, Storyblok 🏢 Description: We’re looking for a Back-End Software Engineer with a strong focus on building and scaling backend services and APIs. In this role, you’ll work on our Backend for Frontend (BFF) layer and core service engines — powering seamless integrations between our frontend applications and enterprise systems. You’ll design and implement high-performance Node.js and Nest.js services, develop RESTful APIs, and collaborate closely with frontend and platform teams to deliver reliable, scalable, and secure solutions. Experience building backend services that expose REST APIs and integrating with enterprise systems is highly valued. Staffing region: Poland/North Macedonia - 100% remote Responsibilities: Develop and maintain enterprise integration services and platform tooling using NestJS Provision and configure cloud environments using GitOps, CI/CD pipelines, Helm, Amazon EKS, and ArgoCD Integrate with enterprise systems including Netcracker, Salesforce CRM, internal APIs, and Storyblok headless CMS Implement infrastructure as code using Terraform for AWS cloud infrastructure Participate in code reviews and technical discussions within Agile Scrum team Deliver secure, scalable solutions in complex enterprise environments Requirements: • 5+ years professional software engineering experience • Backend development with Node.js and NestJS • Container orchestration with Kubernetes, Docker, and Helm • Infrastructure as code with Terraform • AWS cloud services and deployment • Enterprise application development • Large-scale business-critical applications • Third-party system integration (CRM, enterprise platforms, APIs) • Self-starter with ability to work independently with minimal supervision • Excellent written and verbal communication skills • Strong stakeholder communication (technical and non-technical audiences) • Collaborative team player • Constructive feedback (giving and receiving) • Problem-solving skills • Commercial awareness and business acumen • Technical decision-making aligned with business outcomes

🏢 Summary: Oferta dotyczy roli Backend Developera odpowiedzialnego za projektowanie i rozwój wydajnych REST API, komunikacji czasu rzeczywistego oraz bezpiecznych mechanizmów uwierzytelniania w ekosystemie NestJS i TypeScript. Stanowisko obejmuje pracę nad architekturą aplikacji, bazami danych, testami oraz współpracę z frontendem nad kontraktem API. Kandydat będzie odpowiadać za jakość, skalowalność i utrzymanie backendu. 🗂️ Requirements: TypeScript, Node.js, NestJS, MongoDB, Mongoose, PostgreSQL, Drizzle, REST API, WebSockets, Socket.IO, JWT, bcrypt, Zod, class-validator, Jest, Supertest, Git 📃 Skills: TypeScript, Node.js, NestJS, MongoDB, Mongoose, PostgreSQL, Drizzle, REST, WebSockets, Socket.IO, JWT, bcrypt, Zod, class-validator, Jest, Supertest, Git, Bun, Hono, Turborepo, MJML, Mailgun, sharp, canvas, blurhash, Expo, Render, Neon 🏢 Description: Szukamy  programisty/programistki backendu, który czuje się swobodnie zarówno w projektowaniu solidnej architektury, jak i w codziennym dbaniu o jakość i niezawodność systemu. W tej roli będziesz odpowiadać za serce naszych aplikacji - projektowanie i rozwój wydajnych REST API, komunikację czasu rzeczywistego oraz bezpieczne mechanizmy uwierzytelniania. Pracując w ekosystemie NestJS i TypeScript, zadbasz o modułową, przemyślaną architekturę, którą łatwo utrzymać i rozwijać. Będziesz kluczowym ogniwem zespołu - od decyzji o modelu danych (MongoDB, PostgreSQL), przez pokrycie kodu testami, aż po współpracę z frontendem nad spójnym kontraktem API. Jeśli lubisz brać odpowiedzialność za całość, a nie tylko za fragment kodu, ta rola jest dla Ciebie. Programista Backend (Node.js / TypeScript) Wymagania: Bardzo dobra znajomość TypeScript i Node.js Doświadczenie z frameworkiem NestJS (architektura modułowa, DI, guardy, interceptory) Praca z bazami NoSQL (MongoDB / Mongoose) oraz SQL (PostgreSQL) z użyciem ORM (Drizzle) Projektowanie i utrzymanie REST API Komunikacja czasu rzeczywistego - WebSockets ( Socket.IO ) Uwierzytelnianie i autoryzacja - JWT, bcrypt Walidacja danych - Zod, class-validator Pokrywanie kodu testami - Jest / Supertest (testy jednostkowe i e2e) Praca z Git Mile widziane: Runtime Bun oraz framework Hono Monorepo (Turborepo, workspaces) Generowanie dokumentów PDF (@react-pdf/renderer) i maili (MJML + Mailgun) Przetwarzanie obrazów - sharp, canvas, blurhash Push notifications (Expo Server SDK) Deploy na Render, znajomość MongoDB Atlas / Neon