React Tech Lead

🏢 Summary: Node.js Tech Lead role in a financial industry project within an international environment, responsible for designing scalable microservices architectures and leading cross-functional teams. The position combines hands-on Node.js development with technical leadership, cloud infrastructure oversight, and delivery management. The role also involves translating business needs into technical solutions and ensuring engineering best practices. 🗂️ Requirements: 8+ years of software development experience, Strong hands-on experience with Node.js (NestJS or Express), Experience with microservices and distributed systems, Experience with cloud platforms (AWS, Azure or GCP), Experience with Docker, Kubernetes and CI/CD pipelines, Proven experience leading technical teams and conducting code reviews, Experience working in Agile/Scrum/DevOps environments, Fluent English (C1) 📃 Skills: Node.js, NestJS, Express, Microservices, DDD, AWS, Azure, GCP, Docker, Kubernetes, CI/CD, Agile, Scrum, DevOps 🏢 Description: At Pretius , we are looking for Node.js Tech Lead to a project in the financial industry, international team. Project / Role Lead and mentor cross-functional teams (Backend, Frontend, DevOps, QA) Design and oversee scalable architectures based on Node.js and microservices Coordinate multiple teams and support staffing, onboarding, and recruitment Translate business needs into technical solutions and support pre-sales activities Ensure best practices (CI/CD, code quality, testing, security) Monitor delivery, report KPIs, and manage risks Collaborate with international stakeholders Requirements 8+ years of experience in software development, including leadership roles Strong hands-on experience with Node.js (NestJS / Express) Experience with microservices, distributed systems (DDD, event-driven is a plus) Cloud experience (AWS / Azure / GCP) and tools like Docker, Kubernetes, CI/CD Proven ability to lead teams, conduct code reviews, and mentor engineers Experience working with business stakeholders in international environments Familiarity with Agile / Scrum / DevOps Fluent English (C1) What do we offer? We focus on long- term relationships based on fair principles and reliability Co-financing of the Multisport card and Medicover private healthcare Modern office available Team bonding activities, internal courses, conferences, certifications

🏢 Summary: Full Stack Engineer role in a financial industry project within an international team, focused on building and maintaining web applications across frontend and backend. The position involves developing React components, implementing backend logic in Java, managing PostgreSQL databases, and working with Azure Functions and CI/CD pipelines. The role emphasizes high code quality and best development practices. 🗂️ Requirements: 4+ years of experience as Full Stack Developer, Strong knowledge of React, Strong knowledge of Java, Strong knowledge of PostgreSQL, Experience with Azure Functions, Experience with CI/CD pipelines, Understanding of Clean Code principles, Experience with testing practices 📃 Skills: React, Java, PostgreSQL, AzureFunctions, CICD, AzureDevOps, GitHubActions, Jenkins, CleanCode, Testing, Microservices 🏢 Description: At Pretius we are looking for FullStack Enigneer to a project in the financial industry, international team. Project / Role Design, develop, and maintain web applications (frontend + backend) Build and enhance components in React Implement backend logic in Java Work with PostgreSQL databases Develop and maintain Azure Functions Contribute to building and maintaining CI/CD pipelines Collaborate with cross-functional teams (developers, QA, architects) Participate in code reviews and ensure high code quality Requirements 4+ years of experience as a Full Stack Developer Strong knowledge of: React, Java, PostgreSQL Experience with: Azure Functions, CI/CD pipelines (e.g., Azure DevOps, GitHub Actions, Jenkins) Understanding of software development best practices (Clean Code, code reviews, testing) Experience working in Agile/Scrum environments Good command of English (min. B2) Nice to have Experience working in cloud environments (Azure) Knowledge of microservices architecture Experience in enterprise-level projects What do we offer? We focus on long-term relationships based on fair principles and reliability Co-financing of the Multisport card and Medicover private healthcare Modern office available Team bonding activities, internal courses, conferences, certifications

🏢 Summary: Senior Frontend Engineer role focused on owning and evolving the frontend architecture for global-scale digital draw games. The position involves building reusable client frameworks, implementing real-time event-driven systems, and developing interactive web-based game applications. You will guide external studios and ensure scalable, high-quality frontend implementations using modern tooling. 🗂️ Requirements: 5+ years of experience with React and TypeScript, Experience building complex frontend applications, Familiarity with HTML5 game technologies (e.g., Three.js or PlayCanvas), Experience developing interactive or real-time web applications, Experience with state-driven or event-driven frontend architectures, Understanding of asynchronous programming and real-time client-server communication, Experience with modern frontend tooling (e.g., Vite, CSS frameworks, automated testing), Proficiency with Git and collaborative version control workflows, Ability to translate UX and product requirements into technical implementations, Experience working with distributed teams or external development studios 📃 Skills: React, TypeScript, JavaScript, HTML5, Three.js, PlayCanvas, Vite, Tailwind, CSS, Git, REST, WebSockets, Testing 🏢 Description: At Pretius , we are looking for Senior Frontend Engineer to take technical ownership of the frontend architecture powering our digital draw games for global-scale platform in the field of gaming and lotteries. Project / Role Own and evolve the frontend architecture and technical frameworks used across multiple game clients. Design and maintain reusable client foundations and game category frameworks supporting different game paradigms. Develop and maintain frontend systems using React, TypeScript, Vite, and modern CSS frameworks. Implement and maintain event-driven client-server communication patterns for real- time and on-demand gameplay flows. Translate gameplay flows, UX layouts, and production specifications into scalable frontend implementations. Support and guide external development studios building game experiences on top of the client frameworks. Maintain and manage source code repositories, versioning practices, and build pipelines for game clients. Requirements 5+ years of experience developing complex frontend applications using React and TypeScript. Familiarity with HTML5 game development technologies, such as Three.js or PlayCanvas. Proficiency in building interactive or real-time graphical applications for the web. Experience working with external development studios or distributed engineering teams. Strong experience building state-driven or event-driven frontend systems. Solid understanding of asynchronous programming and real-time client-server interactions. Experience with modern frontend tooling such as Vite, CSS frameworks (e.g., Tailwind), and automated testing frameworks. Strong experience with Git, version control, and collaborative development workflows. Ability to translate product and UX concepts into robust technical implementations. Experience collaborating with designers, backend engineers, and product teams. Strong problem-solving and communication skills. Experience working in regulated, transactional, or high-reliability environments is a plus. What do we offer? We focus on long-term relationships based on fair principles and reliability. Co-financing of the Multisport card and Medicover private healthcare. Modern office available. Team bonding activities, internal courses, conferences, certifications.

🏢 Summary: Frontend React Developer role focused on building and scaling modern web applications using React and Next.js in distributed, cloud-based environments. The position involves developing reusable components, integrating with APIs and cloud services, and ensuring high performance, security, and code quality through testing and best practices. The role requires strong experience in scalable architectures and collaboration within microservices-based systems. 🗂️ Requirements: 5+ years of commercial experience with React, Strong knowledge of JavaScript and TypeScript, Practical experience with React hooks, routing, and state management, Experience in distributed systems or microservices environments, Experience with cloud platforms (GCP preferred), Experience building scalable applications consuming REST APIs and JSON, Knowledge of data structures and algorithms, Proficiency in HTML and modern CSS approaches, Experience with automated testing (unit, integration, end-to-end), Ability to debug and optimize applications using browser developer tools, Experience building responsive web interfaces 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML, CSS, Tailwind, SASS, CSSModules, REST, JSON, GCP, Microservices, UnitTesting, IntegrationTesting, E2E, BrowserTools, DataStructures, Algorithms 🏢 Description: We are looking for a Frontend React Developer for our client – a global technology consulting company focused on data, analytics, and cloud-based solutions, supporting international organizations in building scalable digital products. They operate in a distributed environment, combining strong engineering practices with a business-oriented mindset to deliver impactful solutions across multiple industries. Your responsibilities Build and enhance modern web applications using React and Next.js Create reusable components and contribute to scalable frontend architecture Work closely with cross-functional teams including backend engineers, data specialists, and product stakeholders Improve performance, security, and overall user experience of applications Connect frontend layers with APIs and cloud-based services Maintain high development standards through testing and clean coding practices. Requirements At least 5 years of hands-on experience with React in commercial projects Strong command of JavaScript and TypeScript Practical understanding of React fundamentals, including hooks, routing, and state management solutions Experience working in distributed systems or microservices environments Exposure to cloud platforms (GCP experience is an advantage) Background in developing scalable applications that consume REST APIs and work with JSON data Solid grasp of core programming concepts such as data structures and algorithms Good knowledge of HTML and modern CSS approaches (e.g. Tailwind, SASS, CSS Modules, or similar tools) Experience with automated testing (unit, integration, and end-to-end) Ability to debug and optimize applications using browser developer tools Experience in building responsive and user-friendly interfaces across devices Strong communication skills and experience working in collaborative, distributed teams Self-driven approach with a strong sense of ownership English proficiency at B2 + level or higher.

🏢 Summary: Fullstack Developer role for a large-scale travel booking system focused on building and maintaining high-traffic APIs, internal web applications, and numerous external integrations. The position involves working across distributed services, resolving production incidents, and contributing to engineering standards and development practices. 🗂️ Requirements: Strong understanding of SOA, Strong understanding of microservices architecture, Knowledge of API design principles, Experience with Node.js, Experience with JavaScript, Experience with TypeScript, Experience with Docker, Experience with Azure cloud services, Experience with CI/CD practices, Experience integrating third-party systems, Ability to troubleshoot distributed systems 📃 Skills: Node.js, JavaScript, TypeScript, Docker, Azure, SOA, Microservices, API, CI/CD, Cloud 🏢 Description: At Pretius we are looking for a Fullstack Developer for a travel booking system project for a major international transport company. Work mode: hybrid (once a month, a 2-day business trip to a client abroad; the rest of the time, working remotely from Poland) Project / Role Develop and maintain public and private APIs serving 100M+ requests monthly Support and enhance 20+ internal web applications used across the organization Build and maintain integrations with 50+ external systems and platforms Investigate and resolve production incidents across distributed services and the full application stack Contribute to the continuous improvement of engineering standards, tools, and development practices Requirements Bachelor's degree in Computer Science, Computer Engineering, or similar technical field Strong understanding of SOA, microservices, and API design principles Solid experience with Node.js, Nest.js, JavaScript, TypeScript, and Docker Hands-on experience with cloud technologies, particularly Azure Ability to quickly learn and adapt to new technologies and systems Familiarity with CI/CD and modern software delivery practices Experience integrating third-party services and platforms Very good command of English (min. B2) – both verbal and written Nice to have: Proficiency in French or German What do we offer? We focus on long-term relationships based on fair principles and reliability Co-financing of the Multisport card and Medicover private healthcare Modern office available Team bonding activities, internal courses, conferences, certifications

🏢 Summary: Senior Tech Lead role focused on leading engineering teams and defining technical strategy for digital transformation and automation projects. The position involves designing scalable cloud-based solutions using Node.js and React, overseeing architecture, code quality, and CI/CD processes. The role combines hands-on technical leadership with collaboration across international stakeholders. 🗂️ Requirements: Minimum 10 years experience in designing and delivering IT solutions, At least 3 years experience in Tech Lead role, Strong proficiency in Node.js and React, Practical experience with Azure or GCP, Experience with Kubernetes and Terraform, Experience implementing CI/CD pipelines, Experience managing distributed international teams, Higher technical education in Computer Science, Engineering, or related field, Familiarity with ITIL v4, DevOps, Agile, Kanban, Fluent English B2/C1 level 📃 Skills: Node.js, React, Azure, GCP, Kubernetes, Terraform, CI/CD, ITIL, DevOps, Agile, Kanban, JavaScript, Cloud 🏢 Description: We are seeking an experienced Tech Lead to play a pivotal role in leading and growing our engineering teams. The ideal candidate will combine deep technological expertise—especially in node.js/react and cloud solutions—with strong leadership and communication skills. You will be responsible for technical strategy, architecture, code quality, and mentoring, while collaborating with business stakeholders and supporting international projects. Our expectations - Minimum 10 years of experience in designing and delivering IT solutions, including at least 3 years in a leadership role (Tech Lead). - Strong proficiency in node.js/react - Practical experience with cloud platforms (Azure, GCP), Kubernetes, Terraform, CI/CD. - Proven ability to manage distributed and international teams, conduct code reviews, and mentor engineers. - Experience working in international environments and communicating with technical and business stakeholders. - Higher technical education (Computer Science, Engineering, Project Management). - Familiarity with ITIL v4, DevOps, Agile, Kanban methodologies. - Fluent English (B2/C1 level). Soft skills - Excellent communication and presentation skills. - Ability to work under pressure in a dynamic environment. - Proactive, goal-oriented, and problem-solving mindset. - Relationship-building skills with technical and business teams. Key tasks - Lead and mentor technical teams (Frontend, Backend, DevOps, QA) in digital transformation and automation projects. - Design and oversee scalable, secure solutions based on node.js/react and cloud components (Azure, Kubernetes, Terraform). - Implement and maintain CI/CD processes, test automation, monitoring, and deployment pipelines. - Conduct code reviews and ensure adherence to best practices in architecture and security. - Translate business requirements into concrete technical solutions and support pre-sales activities. - Coordinate knowledge transfer and onboarding for development teams. - Monitor project progress, report KPIs, and analyze risks. - Collaborate with international teams and stakeholders (Europe, USA, APAC). - Maintain project documentation and lead status meetings and retrospectives. - Foster a culture of innovation, continuous improvement, and high performance.

🏢 Summary: Offer for a React Developer to build and maintain a financial web portal for managing accounts and investments in the finance/stock exchange industry. The role involves developing new features, maintaining existing functionalities, and ensuring high code quality and security within Agile teams. The project uses modern web technologies and follows best coding and testing standards. 🗂️ Requirements: Minimum 1 year experience with ReactJS, Knowledge of ReactJS ecosystem, Knowledge of Progressive Web App principles, Ability to write clean, testable, maintainable code, Knowledge of Git 📃 Skills: React, ReactJS, JavaScript, PWA, Git, REST, Karma, Jasmine 🏢 Description: At Link Group we build tech teams for Fortune 500 companies and the hottest startups in the world. We run many different projects for which we are looking for experienced and talented candidates for clients from various industries. If you join us, we will make sure that the offer is tailored to your needs. We want you to receive tasks that match your interests, meet your financial expectations and, above all, will allow you to develop in the professional field. Currently, we are looking for React developers to join our teams and work on the most advanced, innovative and diverse projects on the IT market. The project you will join is from the finance/stock exchange industry. Our client creates a web portal to manage financial accounts and make financial investments. Our Agile teams strive to use the latest technologies that ensure an appropriate level of security. Tech stack: React, Web App principles, RESTful API, Karma/Jasmine Responsibilities: Working on ambitious projects using the best technologies and standards; Generating and maintaining your code in accordance with the coding standard and best practices Designing technical solutions for new functionalities and maintaining the existing ones; Investigating, debugging, and delivering fixes for critical production incidents; Researching on the latest technologies to meet future business needs Requirements: At least 1 year of practical experience and knowledge of ReactJS and its ecosystem; Knowledge of progressive Web App principles Writing clean, testable and easily maintainable code Ability to clearly communicate and discuss ideas & concepts Knowledge of GIT Nice to have: Knowledge how to write unit tests with Karma/Jasmine Experience with designing RESTful APIs Understanding of OOP and reactive programming standards Basic knowledge of Docker and Kubernetes Experience in continuous integration and continuous delivery systems We offer: Private healthcare Sport card Foreign languages classes Life insurance Cafeteria system

🏢 Summary: Frontend Team Lead role focused on leading the development of scalable, high-performance React applications in a hybrid work model. The position combines hands-on architecture and implementation with mentoring a frontend team and enforcing best practices in design patterns, testing, and CI/CD. The role requires strong expertise in modern React ecosystem and state management to drive frontend excellence. 🗂️ Requirements: 5+ years experience with JavaScript or TypeScript, 3+ years commercial experience with React.js, Strong knowledge of React Hooks and Context API, Strong experience with Redux and Redux Toolkit, Experience with frontend design patterns and clean code principles, Experience integrating REST or GraphQL APIs, Strong knowledge of HTML5 and CSS3 or SCSS, Experience with component libraries and design systems, Familiarity with Webpack or Vite build tools, Experience with unit and integration testing, Experience leading or mentoring frontend developers 📃 Skills: JavaScript, TypeScript, React, Hooks, ContextAPI, Redux, ReduxToolkit, HTML5, CSS3, SCSS, REST, GraphQL, Webpack, Vite, Jest, ReactTestingLibrary, Storybook, MaterialUI, Tailwind, Next.js, Lighthouse, ChromeDevTools, WCAG, CICD 🏢 Description: Frontend Team Lead (React) 📍 Warsaw Poland, Hybrid remote with 3 days from office 💼 Contract of Employment / Umowa o pracę 💰 Monthly compensation up to 8,000 USD About the Client Our Client is a leader in AI-powered enterprise operations, delivering digital solutions and consulting services that drive value and transform businesses. They specialize in using advanced technology to streamline operations, improve efficiency, and unlock new revenue opportunities, particularly within the private capital markets. Their integrated ecosystem includes PaaS - Platform as a Service, the Core Platform, an AI-native enterprise operations foundation built to optimize workflows, surface insights, and accelerate value creation across portfolios; SaaS - Software as a Service, a cloud platform delivering unmatched performance, intelligence, and execution at scale; and S&C - Solutions and Consulting Suite, modular technology playbooks designed to manage, grow, and optimize company performance. With over a decade of experience supporting high-growth companies and private equity-backed platforms, brings deep domain expertise and a proven ability to turn technology into a strategic advantage. The Role We are looking for an experienced and passionate React Team Lead to lead the development of modern, scalable web applications. You will guide a team of React developers, enforce best practices in frontend architecture and design patterns, and ensure delivery of high-performance user interfaces. The ideal candidate has strong expertise in React (including Hooks and Context API), Redux, and frontend design patterns, and thrives in a fast-paced, collaborative environment. Key Responsibilities Lead, mentor, and support a team of React developers through code reviews, 1:1s, and hands-on coaching. Collaborate with product managers, designers, and backend engineers to define and prioritize features. Own and manage sprint planning, task estimation, and delivery timelines for the frontend team. Architect and implement complex user interfaces using React, Hooks, and Context API. Maintain and evolve a scalable state management solution using Redux Toolkit. Enforce modern frontend design patterns (such as container/presenter, compound components, render props, and HOCs). Build reusable component libraries and maintain design system alignment. Optimize application performance, accessibility, and cross-browser compatibility. Drive best practices in code quality, testing, CI/CD, and documentation. Maintain high unit and integration test coverage (e.g., using Jest, React Testing Library). Contribute to frontend architecture decisions and evaluate new tools/libraries as needed. Requirements 5+ years of experience in JavaScript/TypeScript with 3+ years in React.js Strong expertise with React Hooks, Context API, and Redux (Redux Toolkit preferred) Proven experience with frontend design patterns and clean code principles Experience integrating with RESTful APIs or GraphQL Solid understanding of HTML5, CSS3/SCSS, and responsive UI design Experience with component libraries and design systems (e.g., Storybook, Material UI, Tailwind) Familiarity with build tools like Webpack, Vite, and bundler optimizations Experience leading or mentoring engineers in a team setting Nice to Have Familiarity with performance profiling tools (e.g., Lighthouse, Chrome DevTools) Experience with SSR/SSG frameworks like Next.js Knowledge of accessibility standards (WCAG) Contributions to open-source frontend libraries What’s Offered Monthly compensation up to 8,000 USD Opportunity to lead a specialized frontend team in a fast-growing tech company Real influence on frontend architecture and design patterns

🏢 Summary: Offer for an experienced React Developer to work on an advanced financial web portal for managing accounts and investments within an Agile environment. The role focuses on building secure, high-quality frontend solutions using modern technologies and best practices. The project is in the finance/stock exchange industry and emphasizes innovation and code quality. 🗂️ Requirements: Minimum 5 years of practical experience with ReactJS and its ecosystem, Knowledge of Progressive Web App principles, Ability to write clean, testable and maintainable code, Knowledge of GIT, Ability to write unit tests using Karma and Jasmine, Experience in designing RESTful APIs, Deep understanding of OOP, Understanding of reactive programming standards, Good knowledge of Docker, Good knowledge of Kubernetes, Experience with CI/CD systems 📃 Skills: React, ReactJS, JavaScript, PWA, REST, Karma, Jasmine, Git, OOP, Docker, Kubernetes, CI/CD 🏢 Description: At Link Group we build tech teams for Fortune 500 companies and the hottest startups in the world. We run many different projects for which we are looking for experienced and talented candidates for clients from various industries. If you join us, we will make sure that the offer is tailored to your needs. We want you to receive tasks that match your interests, meet your financial expectations and, above all, will allow you to develop in the professional field. Currently, we are looking for React developers to join our teams and work on the most advanced, innovative and diverse projects on the IT market. The project you will join is from the finance/stock exchange industry. Our client creates a web portal to manage financial accounts and make financial investments. Our Agile teams strive to use the latest technologies that ensure an appropriate level of security. Tech stack: React, Web App principles, RESTful API, Karma/Jasmine Responsibilities: Working on ambitious projects using the best technologies and standards; Generating and maintaining your code in accordance with the coding standard and best practices Designing technical solutions for new functionalities and maintaining the existing ones; Investigating, debugging, and delivering fixes for critical production incidents; Researching on the latest technologies to meet future business needs Requirements: At least 5 years of practical experience and knowledge of ReactJS and its ecosystem; Knowledge of progressive Web App principles Writing clean, testable and easily maintainable code Ability to clearly communicate and discuss ideas & concepts Knowledge of GIT Knowledge how to write unit tests with Karma/Jasmine Experience with designing RESTful APIs Deep understanding of OOP and reactive programming standards Good knowledge of Docker and Kubernetes Experience in continuous integration and continuous delivery systems We offer: Private healthcare Sport card Foreign languages classes Life insurance Cafeteria system

🏢 Summary: Opportunity for an experienced React Developer to join an Agile team building a secure web portal for financial account management and investment services in the finance/stock exchange industry. The role involves developing new features, maintaining existing functionalities, and ensuring high code quality using modern technologies and best practices. 🗂️ Requirements: Minimum 3 years of experience with ReactJS and its ecosystem, Knowledge of Progressive Web App principles, Experience designing and consuming RESTful APIs, Ability to write unit tests using Karma and Jasmine, Knowledge of Git version control, Understanding of OOP and reactive programming, Basic knowledge of Docker and Kubernetes, Experience with CI/CD systems, Ability to write clean, testable, maintainable code 📃 Skills: React, JavaScript, REST, Karma, Jasmine, Git, Docker, Kubernetes, CI/CD, OOP, PWA 🏢 Description: At Link Group we build tech teams for Fortune 500 companies and the hottest startups in the world. We run many different projects for which we are looking for experienced and talented candidates for clients from various industries. If you join us, we will make sure that the offer is tailored to your needs. We want you to receive tasks that match your interests, meet your financial expectations and, above all, will allow you to develop in the professional field. Currently, we are looking for React developers to join our teams and work on the most advanced, innovative and diverse projects on the IT market. The project you will join is from the finance/stock exchange industry. Our client creates a web portal to manage financial accounts and make financial investments. Our Agile teams strive to use the latest technologies that ensure an appropriate level of security. Tech stack: React, Web App principles, RESTful API, Karma/Jasmine Responsibilities: Working on ambitious projects using the best technologies and standards; Generating and maintaining your code in accordance with the coding standard and best practices Designing technical solutions for new functionalities and maintaining the existing ones; Investigating, debugging, and delivering fixes for critical production incidents; Researching on the latest technologies to meet future business needs Requirements: At least 3 years of practical experience and knowledge of ReactJS and its ecosystem; Knowledge of progressive Web App principles Writing clean, testable and easily maintainable code Ability to clearly communicate and discuss ideas & concepts Knowledge of GIT Knowledge how to write unit tests with Karma/Jasmine Experience with designing RESTful APIs Understanding of OOP and reactive programming standards Basic knowledge of Docker and Kubernetes Experience in continuous integration and continuous delivery systems We offer: Private healthcare Sport card Foreign languages classes Life insurance Cafeteria system