Senior Full Stack Developer (Node.js + React)

🏢 Summary: Senior Full-Stack Engineer role focused on designing and evolving scalable SaaS systems using Node.js and React in a 100% remote B2B model. The position involves architectural decision-making, production system ownership, performance optimization, and mentoring within a distributed team. The offer targets experienced engineers capable of leading technical initiatives and ensuring system reliability at scale. 🗂️ Requirements: Minimum 10 years of professional software development experience, Proven experience with SaaS-based systems, Strong knowledge of scalable systems and software architecture, Hands-on experience with Node.js, Hands-on experience with React, Experience designing or evolving system architectures, Experience working with production systems and real users, Experience with monitoring, debugging, and performance optimization, Ability to own major system components and lead technical decisions, Excellent English proficiency 📃 Skills: Node.js, React, JavaScript, SaaS, AWS, GCP, Azure, CI/CD, DevOps, Architecture, Monitoring, Debugging, Performance, Scalability 🏢 Description: For a client, we are looking for a Senior Full-Stack Engineer (NodeJS + React)! Salary: 24 000-27 000 net+VAT B2B 100% remote RESPONSIBILITIES Architecture, production, and reliability experience: Proven experience designing systems from scratch or significantly evolving existing architectures Experience working on production systems with real users Strong understanding of architectural trade-offs (performance, scalability, cost, and maintainability) Experience with monitoring, debugging, and performance optimization in production environments Familiarity with handling production issues and incidents Ownership and leadership: Experience owning major system components or leading technical decisions Ability to work independently with minimal supervision Experience mentoring junior or mid-level developers and collaborating within a team REQUIREMENTS At least 10 years of professional software development experience Proven experience working with SaaS-based systems Strong understanding of scalable systems and software architecture Hands-on experience with Node.js and React Excellent English proficiency and strong communication skills NICE TO HAVE Experience with cloud platforms such as AWS, GCP, or Azure Familiarity with CI/CD pipelines and modern DevOps practices Experience working in distributed or remote teams Product mindset — ability to understand business requirements and translate them into technical solution WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 24 000-27 000 PLN/hour 100% remote work The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Iga Olszewska-Magnowska Senior IT Delivery Consultant iga.olszewska@speedapp.pl

🏢 Summary: Seeking a Senior Full-Stack Engineer (NodeJS + React) to design, evolve, and maintain scalable SaaS systems in a fully remote B2B engagement. The role focuses on architecture, production reliability, and technical ownership of key system components. You will work on real-user production systems, ensuring performance, scalability, and maintainability. 🗂️ Requirements: Minimum 10 years of professional software development experience, Proven experience with SaaS-based systems, Strong knowledge of scalable systems and software architecture, Hands-on experience with Node.js, Hands-on experience with React, Experience designing or evolving system architectures, Experience working with production systems, Experience with monitoring, debugging, and performance optimization, Fluent English proficiency 📃 Skills: Node.js, React, JavaScript, SaaS, Architecture, Scalability, Monitoring, Debugging, CI/CD, AWS, GCP, Azure 🏢 Description: For a client, we are looking for a Senior Full-Stack Engineer (NodeJS + React)! Salary: 24 000-27 000 net+VAT B2B 100% remote RESPONSIBILITIES Architecture, production, and reliability experience: Proven experience designing systems from scratch or significantly evolving existing architectures Experience working on production systems with real users Strong understanding of architectural trade-offs (performance, scalability, cost, and maintainability) Experience with monitoring, debugging, and performance optimization in production environments Familiarity with handling production issues and incidents Ownership and leadership: Experience owning major system components or leading technical decisions Ability to work independently with minimal supervision Experience mentoring junior or mid-level developers and collaborating within a team REQUIREMENTS At least 10 years of professional software development experience Proven experience working with SaaS-based systems Strong understanding of scalable systems and software architecture Hands-on experience with Node.js and React Excellent English proficiency and strong communication skills NICE TO HAVE Experience with cloud platforms such as AWS, GCP, or Azure Familiarity with CI/CD pipelines and modern DevOps practices Experience working in distributed or remote teams Product mindset — ability to understand business requirements and translate them into technical solution WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 24 000-27 000 PLN/hour 100% remote work The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Iga Olszewska-Magnowska Senior IT Delivery Consultant iga.olszewska@speedapp.pl

🏢 Summary: Senior Full Stack Developer role focused on architecting and delivering high-performance web applications using React and Node.js. The position involves leading system design, building scalable front-end and back-end solutions, and overseeing cloud-based deployments and DevOps processes. The role includes technical ownership of microservices, APIs, databases, and application performance in a hybrid Warsaw-based setup. 🗂️ Requirements: 7+ years full stack development experience, 2+ years in senior or technical lead role, Expert-level React.js with Hooks and Redux, Advanced JavaScript ES6+ proficiency, Strong Node.js and Express.js experience, Experience designing REST or GraphQL APIs, Experience with OAuth, JWT, sessions, RBAC, Database design and optimization with PostgreSQL, MySQL, or MongoDB, Hands-on Docker experience, Experience with AWS, Azure, or GCP, CI/CD pipeline management experience, Proficiency with Git workflows, Bachelor’s or Master’s in Computer Science or related field 📃 Skills: React, Redux, JavaScript, HTML5, CSS3, Node.js, Express, GraphQL, REST, OAuth, JWT, RBAC, PostgreSQL, MySQL, MongoDB, Docker, Kubernetes, AWS, Azure, GCP, Git, CI/CD, Webpack, Babel, Vite 🏢 Description: 🧩 About the Company Our client is a rapidly growing US-based technology firm with global operations. With a strong commitment to innovation and quality engineering, the company is building a new engineering hub in Warsaw. This is your opportunity to join a high-performing team and play a pivotal role in developing next-generation digital solutions for the private capital markets. 📍 Location & Setup Start remotely and transition to a hybrid model based in Warsaw (3 days/week in the office in the coming months). 🧠 The Role: Senior Full Stack Developer (React & Node.js) We’re looking for an expert-level Senior Full Stack Developer with at least 7 years of professional experience in designing, architecting, and delivering high-performance web applications. You will take ownership of complex technical challenges across both the front-end and back-end, drive architectural decisions, and provide technical leadership and mentorship within the software development lifecycle. 🔧 Key Responsibilities Technical Leadership: Architect and develop scalable, responsive UIs with React.js, Redux, and modern JavaScript (ES6+). System Design: Design, build, and scale advanced server-side applications, microservices architecture, and RESTful/GraphQL APIs with Node.js and Express. Data Architecture: Lead database design, optimization, and integration strategies (PostgreSQL, MySQL, or MongoDB). Quality Assurance: Define testing strategies, write robust unit/integration tests, and establish efficient debugging protocols for the team. DevOps & Deployment: Oversee and optimize CI/CD pipelines, containerization using Docker, and cloud deployments. Agile Mentorship: Lead agile collaboration with product managers, designers, and engineers, while mentoring mid-level and junior developers. Performance: Proactively monitor system performance, identify bottlenecks, and maintain high-availability production-grade applications. Standards: Establish and maintain comprehensive technical documentation and coding standards. 📌 What We’re Looking For Front-End: Expert-level experience with React.js, Hooks, Redux, and complex component-based architecture. Deep mastery of HTML5, CSS3, and ES6+. Advanced configuration and optimization experience with build tools like Webpack, Babel, or Vite. Back-End: Senior-level proficiency in Node.js & Express.js for enterprise applications. Extensive API design and architecture experience (GraphQL highly preferred, alongside REST). Deep understanding and implementation experience with advanced security and authentication protocols: OAuth, JWT, sessions, and RBAC. Databases & DevOps: Proven experience in scaling and optimizing relational and non-relational databases (PostgreSQL, MySQL, or MongoDB). Solid hands-on experience with Docker; Kubernetes experience is highly advantageous. Demonstrated experience designing and deploying applications on cloud platforms (AWS, Azure, or GCP). Advanced proficiency with Git workflows and driving Agile/Scrum methodologies. 🎓 Qualifications Bachelor’s or Master’s in Computer Science or a related field. 7+ years of hands-on experience in full stack development. 2+ years of experience in a senior or technical lead capacity. Proven track record of architecting, deploying, and maintaining high-traffic production applications. 💡 Soft Skills Strategic, analytical thinker and highly effective problem-solver. Strong technical leadership, team collaboration, and cross-functional communication skills. Self-motivated with excellent time management and the ability to drive projects autonomously. Passion for continuous learning, adopting new technologies, and sharing knowledge with the team. 🎁 What’s Offered Competitive salary up to $6,200 USD/month. Hybrid remote role with 3 days form office in the heart of Warsaw Generous Paid Time Off (PTO). Comprehensive full benefits package. The unique chance to shape the technical foundation of a new engineering hub and lead high-impact projects. A supportive, innovation-driven work environment that values technical excellence.

🏢 Summary: Senior Full Stack Developer role focused on building and maintaining a complex web application for visualization of financial relationship networks using React, Node.js, GraphQL, and graph databases. The position involves end-to-end development, backend integration, graph data visualization, and architectural decision-making in a fully remote B2B setup. Candidates will work with scalable microservices, streaming systems, and advanced frontend performance optimization. 🗂️ Requirements: Minimum 7 years of commercial software development experience, Expert knowledge of React, Advanced TypeScript skills, Strong experience with Redux, Experience optimizing frontend performance for large datasets, Solid Node.js backend development experience, Experience building REST APIs, Experience building GraphQL APIs, Knowledge of application architecture and design patterns, Experience with Storybook, English level B2/C1, Ability to make technical decisions independently 📃 Skills: React, Node.js, TypeScript, Redux, GraphQL, REST, Storybook, MongoDB, Neo4j, Kafka, D3.js, GoJS, Cytoscape, AGGrid, Cypher, Gremlin, Neptune 🏢 Description: Senior Full Stack Developer (React / Node.js / Graph Data) Stawka: 190 – 200 PLN / godz. netto (+ VAT) Forma współpracy: Kontrakt B2B Model pracy: 100% Zdalnie (w ramach zespołu w Polsce) Godziny pracy: 9:00 – 17:00 (Warsaw Time) O projekcie Dołączasz do nowo powstającego, zespołu projektowego w Polsce, który przejmuje całkowitą odpowiedzialność za end-to-end rozwój zaawansowanej aplikacji webowej opartej na technologii baz grafowych. Przenosimy "serce" systemu do Polski. Aplikacja służy do wizualizacji złożonych sieci powiązań finansowych . Szukamy mocnego zawodnika – Seniora z krwi i kości, który bez problemu połączy skomplikowany świat danych backendowych z najwyższej klasy interfejsem użytkownika. Twój profil: Silny Full Stack (Mocny React + Solidny Node.js) W tej roli łączysz dwa światy. Z jednej strony potrzebujemy Twojej eksperckiej wiedzy w React , aby płynnie renderować ogromne ilości danych i sieci powiązań grafowych. Z drugiej strony Twój kod w Node.js będzie stanowił "serce" komunikacji między API GraphQL a rozbudowanym ekosystemem danych (Kafka, MongoDB, Neo4j). Twoje zadania: React Excellence: Projektowanie i rozwój zaawansowanych, wydajnych aplikacji webowych przy użyciu React i TypeScript. Wizualizacja Danych Grafowych: Transformacja surowych danych z bazy grafowej na interaktywne, responsywne komponenty UI (z użyciem D3.js, GoJS lub pokrewnych). Rozwój Core Backend: Projektowanie, utrzymanie i optymalizacja skalowalnych mikroserwisów w Node.js (TypeScript). Ewolucja GraphQL & Integracja: Projektowanie optymalnych schematów i wydajnych resolverów, które spajają frontend z bazami NoSQL/Neo4j oraz systemami streamingowymi (Kafka). Quality & Architecture Leadership: Aktywny udział w podejmowaniu decyzji architektonicznych, dbanie o czystość kodu (rygorystyczne Code Review) oraz rozwój reużywalnych komponentów w Storybook. Wymagania (Must Have) – Szukamy Eksperta: Minimum 7 lat komercyjnego doświadczenia w rozwoju oprogramowania. Expert React & TypeScript: Głęboka znajomość nowoczesnych wzorców React, zaawansowanego zarządzania stanem ( Redux ) oraz optymalizacji wydajności frontendowej przy renderowaniu dużych, zagnieżdżonych zestawów danych. Solidny Node.js & TypeScript: Praktyczne doświadczenie w budowaniu stabilnych, produkcyjnych systemów backendowych i wydajnych API (REST / GraphQL ). Architektura & Narzędzia: Bardzo dobra znajomość architektury aplikacji, wzorców projektowych oraz praca ze Storybook . Język angielski: Minimum B2/C1 – warunek konieczny do codziennej, płynnej współpracy z interesariuszami z USA i Holandii. Zdolność do brania odpowiedzialności: Szukamy osoby z samodzielnym podejściem, która potrafi podjąć decyzję techniczną i dba o stabilność całego systemu. Mile widziane (Mile widziane): Praktyczna znajomość baz NoSQL oraz baz grafowych (np. MongoDB, Neo4j , AWS Neptune) wraz z zapytaniami Cypher/Gremlin. Doświadczenie z systemami event-driven / streamingowymi (np. Apache Kafka ). Zaawansowana znajomość AG Grid pod kątem rozbudowanego raportowania. Doświadczenie z bibliotekami do wizualizacji danych (D3.js, GoJS, Cytoscape). Co oferujemy? Realny wpływ: Nie jesteś tylko wykonawcą zadań. Jako Senior masz decydujący głos w kwestiach architektonicznych i technologicznych. Unikalny Stack Technologiczny Stabilność i profesjonalizm plus praca zdalna Zainteresowany? Aplikuj

🏢 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: Long-term B2B contract for a Senior Full-stack Developer working on Treasury solutions for an international financial institution. The role involves full-stack development using React, Java, Spring Boot, and Python within a large-scale global development team in a hybrid Warsaw setup. 🗂️ Requirements: 5+ years of software engineering experience, Experience in full-stack development, Good knowledge of React, Good knowledge of Java, Good knowledge of Spring Boot, Python scripting experience, Experience with unit testing, Experience with integration testing, Experience using AI development tools, Fluent English 📃 Skills: React, Java, SpringBoot, Python, Redux, Claude, Jest, Cypress 🏢 Description: Sr Full-stack Developer (React, Java) Location: Warsaw (3 days in office per week) Rate: 140–170 PLN/h (B2B) Contract duration: Long-term contracting (first contract until the end of 2026 with possible extensions) Client: International financial institution Tasks: - Full-stack development tasks for the Treasury business area - Work with React, Java, Spring Boot, and Python - Collaborate within a large-scale global development team Requirements: - 5+ years of experience in software engineering (full-stack preferred) - Good knowledge of React - Good knowledge of Java and Spring Boot - Python scripting experience - Experience with unit and integration tests - Experience with AI tools for developers - Fluent English Nice to have: - Experience in finance or fintech sector - Knowledge of Redux - Knowledge of Claude - Knowledge of Jest - Knowledge of Cypress

🏢 Summary: Senior Fullstack Developer role focused on extending a HubSpot-based CRM with new frontend, backend, and integration functionalities in a fully remote setup. The position involves building custom modules, managing license and trial features, and ensuring reliable integrations between internal and external systems. The developer will take ownership of data flows, webhooks, and system reliability within a small cross-functional team. 🗂️ Requirements: Minimum 5 years of experience as Fullstack Developer, Strong knowledge of React, Strong knowledge of TypeScript, Solid experience with Node.js, Experience with API development, Hands-on experience with webhooks, Experience with system integrations, Ability to extend existing backend codebases, Experience with AI-assisted coding tools, English C1 level, Polish B2 level 📃 Skills: React, TypeScript, Node.js, APIs, Webhooks, HubSpot, CRM, LMS, Authentication, Integrations, Monitoring, Observability, Claude 🏢 Description: Senior Fullstack Developer (React / Node.js) – Fully Remote Location: Fully remote Working hours: 10:00–18:00 (UK time), no travel required Rate: PLN 120–160 / hour Project duration: Initial 2 months, extension very likely Client: International financial institution Process: 2 interview stages Team: 2 Developers, Project Manager, Architect About the Role We are looking for an experienced Senior Fullstack Developer to join a small, cross-functional team working on the expansion of an existing CRM system. The project focuses on extending a HubSpot-based solution with new frontend, backend, and integration functionalities. You will play a key role in designing and building a new custom HubSpot application for internal users, developing license and trial management features, and integrating multiple internal and external systems. The role combines hands-on development with ownership of integrations and data flow reliability. Responsibilities Design and develop a new custom module within an existing HubSpot application Build user-facing interfaces for internal HubSpot users Implement a management panel for customer trials and licenses Integrate the application with existing internal APIs Identify and implement missing backend functionalities Develop integration code in Node.js connecting LMS webhooks with the authentication system Automate user account creation based on LMS-triggered events Automate user roles and permissions assignment based on learning system data Ensure data consistency, reliability, and observability across systems Handle error management, retries, and monitoring of webhook-based flows Requirements Minimum 5 years of professional experience as a Fullstack Developer Very strong knowledge of React and TypeScript Solid experience with Node.js and API development Hands-on experience with webhooks and system integrations Ability to read, understand, and extend existing backend codebases Practical experience using Claude Code or similar AI-assisted coding tools English proficiency at C1 level (daily collaboration with international clients) Polish proficiency at B2 level or higher (internal team communication) What We Offer Fully remote work Competitive hourly rate: PLN 120–160 Sports card (Multisport or equivalent) Private medical healthcare Access to learning and training platforms Small, experienced team with a clear technical direction High likelihood of project extension after 2 months

🏢 Summary: Senior Full Stack Developer role focused on building high-performance, data-driven web applications with a strong emphasis on React and complex graph visualizations. The position involves developing scalable Node.js APIs and transforming large-scale graph data into interactive UI components. Fully remote B2B contract within a Poland-based team working standard business hours. 🗂️ Requirements: 7+ years of software development experience, Expert knowledge of React and TypeScript, Strong experience with Node.js and TypeScript for server-side development, Experience building REST and GraphQL APIs, Extensive experience with Redux state management, Proficiency with Storybook for component-driven development, Ability to optimize frontend performance for large-scale datasets, High proficiency in English (B2/C1) 📃 Skills: React, TypeScript, Node.js, Redux, GraphQL, REST, D3.js, GoJS, Cytoscape, Neo4j, Cypher, AGGrid, Storybook, Microservices 🏢 Description: Senior Full Stack Developer (React / Node.js ) The Role As a Full Stack Developer with a strong emphasis on React , you will be responsible for crafting the visual and interactive elements of applications that visualize complex financial and ownership networks. While the backend is built on Node.js , your primary challenge will be turning intricate graph data into seamless, high-performance UI components. Key Responsibilities React Excellence: Lead the development of complex, data-driven web applications using React and TypeScript . Graph Visualization: Transform raw graph data into interactive, responsive UIs using D3.js, GoJS , or similar libraries. Backend Services: Develop and maintain scalable APIs and microservices using Node.js and TypeScript . Data Integration: Work closely with graph engineers to integrate real-time GraphQL data and high-end AG Grid reports. Performance: Optimize the frontend to handle and render large-scale, nested datasets without lag. Architecture: Maintain reusable components in Storybook and ensure a consistent, scalable codebase. Technical Requirements (Must Have) 7+ years of experience in software development. Expert React & TypeScript: Deep knowledge of modern React patterns and performance tuning. Node.js & TypeScript: Solid experience in building server-side applications and REST/GraphQL APIs. State Management: Extensive experience with Redux . Modern Tooling: Proficiency with Storybook for component-driven development. English: High proficiency ( B2/C1 ) for daily collaboration with US and Netherlands-based stakeholders. Nice to Have Data Viz: Experience with D3.js, GoJS , or Cytoscape . Graph Databases: Familiarity with Neo4j, or Cypher Reporting: Advanced knowledge of AG Grid . Assignment Details Contract Type: B2B Work Model: 100% Remote / Work from Home Business Hours: 9:00 – 17:00 (Warsaw Time) Location: Poland-based delivery team

🏢 Summary: B2B contract opportunity for a Full Stack Developer focused on Java, React, and cloud-native technologies to build advanced planning applications and scalable backend/frontend systems. The role involves AI-assisted development, CI/CD ownership, automated testing, and collaboration with cross-functional product teams in a mostly remote setup. 🗂️ Requirements: Strong proficiency in React, Strong proficiency in Next.js, Strong proficiency in Node.js, Experience with Server-Side Rendering (SSR), Advanced programming experience with Java, Advanced programming experience with TypeScript, Deep knowledge of Java enterprise development, Experience with Spring Boot, Experience integrating LLMs and AI tools, Experience with REST APIs, Experience with relational databases, Experience with NoSQL databases, Experience with MS Azure, Hands-on experience with Docker, Hands-on experience with Kubernetes, Hands-on experience with Terraform, Experience with GitHub Actions, Experience with Gradle, Experience writing Unit tests, Experience writing Integration tests, Experience writing E2E tests, English proficiency minimum B2, Polish proficiency minimum B2+, Understanding of Agile principles, Knowledge of Scrum or Kanban 📃 Skills: Java, React, Next.js, Node.js, TypeScript, JavaScript, Spring, SpringBoot, REST, SQL, NoSQL, Azure, Docker, Kubernetes, Terraform, GitHub, Actions, Gradle, SSR, LLM, AI, Scrum, Kanban 🏢 Description: For one of our clients, we are looking for a Full Stack Developer (Java,React). Offer • Rate: up to 140 PLN/h net+VAT • Location: remote + visits in Katowice once per quarter • Contract: B2B Requirements • Strong proficiency in React, Next.js, and Node.js , including Server-Side Rendering (SSR) . Vue is a plus. • Advanced, hands-on programming experience with both Java and TypeScript / JavaScript. • Deep knowledge of enterprise software development using Java and Spring Boot technologies. • Experience integrating LLMs and AI tools into daily workflows to optimize development speed. • Mastery of REST APIs and experience with r elational/NoSQL databases , especially within MS Azure . • Hands-on experience with Docker, Kubernetes, Terraform , and pipeline automation via GitHub Actions and Gradle. • Direct experience writing automated Unit, Integration, and E2E tests. • Proficiency in English at a B2 minimum level. • Proficiency in Polish at a B2+ minimum level. • Strong understanding of Agile principles including Scrum or Kanban. Responsibilities • Design advanced planning applications in close collaboration with cross-functional teams. • Develop robust backend APIs for resource scheduling, allocation logic, and core modules. • Create responsive interfaces focused on performance, security, data visualization, and accessibility. • Build your own AI-based work environment using advanced developer tools to maximize efficiency. • Manage the platform lifecycle from architectural strategy to operations and CI/CD practices. • Design and implement automated test scenarios to guarantee platform success. • Maintain active communication with the Technical Product Owner and Product Management organization to align priorities.

🏢 Summary: Senior Fullstack (React + Node.js) Developer role focused on building and enhancing a complex iGaming platform using modern web technologies. The position involves developing new features, integrating third-party APIs, and ensuring scalability, performance, and code quality within a microservices-based architecture. Office presence in Łódź or Wrocław is required. 🗂️ Requirements: Knowledge of JavaScript and ECMAScript 6, 3+ years commercial experience with React, 3+ years commercial experience with Node.js, 3+ years commercial experience with Nest.js, 5+ years commercial experience in web development, Experience with high-load SQL or NoSQL databases, Experience implementing REST, GraphQL and WebSockets, Understanding of TDD principles and writing tests, Understanding of microservices architecture, Experience with GIT, Experience with RabbitMQ, Experience with Redis, Ability to work from office in Łódź or Wrocław 5 days per week 📃 Skills: JavaScript, ECMAScript6, React, Node.js, Nest.js, SQL, NoSQL, REST, GraphQL, WebSockets, TDD, Microservices, GIT, RabbitMQ, Redis 🏢 Description: We are looking for a Senior Fullstack (React + Node.js) Developer to join our team in developing a complex iGaming platform using the latest web development technologies. If you're a self-starter with solid architecture, design, coding, testing, and debugging skills, we'd love to hear from you! Please note that office work 5 days from the EPAM office in Łódź, Wroclaw is required. Responsibilities Develop the in-house iGaming platform Integrate 3rd party APIs Create new features from inception Collaborate with cross-functional teams for high-quality solutions Ensure platform scalability and performance Maintain code quality through testing and debugging Contribute to architectural and design decisions Enhance and support existing platform components Requirements Knowledge of JavaScript and ECMAScript 6 standards 3+ years commercial experience in React, Node.js and Nest.js 5+ years commercial experience in web development Background in high loaded SQL or NoSQL databases Implementation of REST, GraphQL and WebSockets Understanding of TDD principles and test writing Familiarity with microservice architecture principles Skills in GIT, RabbitMQ and Redis Nice to have 2+ years hands-on background developing over CI/CD, Microservices architecture or Containers Familiarity with Kubernetes, Nats or TypeScript We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.