React & Next.js Developer

🏢 Summary: Senior Full-Stack Engineer role focused on designing and delivering scalable web applications using Python and modern frontend technologies within a global technology modernization program. The position involves architectural design, backend and frontend development, and building cloud-native solutions on AWS. The project is in an early stage, emphasizing system architecture, technology selection, and proof-of-concept development. 🗂️ Requirements: 5+ years of experience in modern web application development with React and Next.js, Experience in Python backend development with FastAPI or Django, Proven experience in architecting and scaling full-stack web applications, Hands-on experience with AWS services (Lambda, Step Functions, API Gateway, Fargate, Kinesis Data Streams), Experience with Infrastructure as Code using AWS CloudFormation, Experience with CI/CD pipelines and DevOps practices, Experience with GitHub Actions for automation, Experience in writing and maintaining unit and integration tests 📃 Skills: Python, React, Next.js, FastAPI, Django, AWS, Lambda, StepFunctions, APIGateway, Fargate, Kinesis, CloudFormation, GitHubActions, CI/CD, DevOps, REST, API, UnitTesting, IntegrationTesting 🏢 Description: Client Our client is one of the leading reinsurance service providers across the globe. Their technological platform is constantly evolving as they apply new and emerging technologies to their expanding business. Join a great company, not merely an individual project Project overview Clients’ technological platforms are constantly evolving as they adopt new and emerging technologies to support their expanding businesses. The team manages applications at the heart of clients’ core business strategies and supports a global user base. The nature of clients’ businesses demands high levels of agility, which in turn requires the team to be technically superior. The project is part of clients’ global technology modernization roadmaps. It aims to equip key business lines with the technology needed to address modern market challenges and seize new opportunities. The development focuses on core business applications using a modern AWS toolset with Python on the backend. As the project is in its early stages, a significant portion of the work involves architectural design, technology selection, and proof-of-concept (POC) activities. Position overview We are looking for a Senior Full-Stack Engineer with strong expertise in Python, React and Next.js on frontend who can design, architect, and deliver scalable systems. In this role, you will be responsible for designing and developing scalable, maintainable frontend architectures using React.js and Next.js, while also contributing to backend development leveraging modern Python-based technologies. This position offers the exciting opportunity to work on a cutting-edge project that is part of a broader technology modernization roadmap, utilizing advanced AWS tools and modern development practices. Responsibilities Design, build, and maintain high-quality backend systems using Python with frameworks such as FastAPI, Django, or similar. Make architectural decisions regarding component structure, API design, infrastructure and data flow. Develop, optimize, and maintain high-quality, scalable applications. Continuously improve and optimize performance and user experience. Collaborate closely with business domain leads, users, designers, Frontend and Backend engineers to ensure seamless integration of frontend components through APIs and smooth data flow. Optimize applications for performance, observability, and reliability. Perform testing before release. Write and maintain unit tests and integration tests to ensure code stability and reliability. Requirements 5+ years of experience in Modern Web Application development in particular React, Next.js Experience in Python-based backend development, especially with modern frameworks like FastAPI/Django. Proven experience in architecting and scaling full-stack web applications. Experience working with AWS (Lambda, Step Functions, API Gateway Fargate, Kinesis Data Streams) Extensive experience in writing and maintaining unit tests and integration tests. Experience with Infrastructure as Code frameworks like AWS CloudFormation. Experience with software automation platforms like GitHub Actions. Strong problem-solving skills and logical thinking, with the ability to quickly identify and resolve issues. Familiarity with CI/CD pipelines and DevOps practices. Nice to have Prior experience in working in Financial Services/Insurance industry. Prior experience working in an Agile/Scrum development environment.

🏢 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: Full-Stack Engineer role focused on designing and building scalable, high-performance backend and frontend solutions for large-scale educational products. The position involves working with modern JavaScript/TypeScript technologies in a cloud-native AWS environment, contributing to architecture, reliability, and system scalability. Ideal for an experienced engineer who can lead technical decisions and work across complex distributed systems. 🗂️ Requirements: 10+ years of professional software development experience, 5+ years of Node.js experience, 2+ years of experience with modern frontend frameworks (React), Experience with PostgreSQL and MongoDB, Experience deploying production systems on AWS, Experience with RESTful APIs and GraphQL, Experience with serverless architectures, Experience integrating AI coding tools (LLMs, Claude Code, GitHub Copilot), Experience with CI/CD practices, Ability to work with complex systems and large codebases 📃 Skills: JavaScript, TypeScript, Node.js, React, REST, GraphQL, PostgreSQL, MongoDB, AWS, AppSync, Lambda, Serverless, Terraform, Datadog, CI/CD, LLMs, Claude, Copilot 🏢 Description: Client Our client is a leading U.S. education company that has been transforming K–12 learning since 2000. They create next‑generation curriculum and formative assessment solutions, offering interactive products designed for both teachers and students. Their programs support learners from elementary through high school and are used in all 50 states, across 21,000+ schools, serving over 10 million students. Position overview We are looking for a highly skilled Full‑Stack Engineer to join a growing team supporting a leading U.S. education technology company. In this role, you will design and build scalable, high‑performance backend and frontend solutions using modern JavaScript/TypeScript technologies. You will work across a cloud‑native architecture, collaborating with cross‑functional teams to solve complex technical challenges, improve system reliability, and drive technical excellence. This position is ideal for an engineer who enjoys ownership, thrives in active development environments, and is eager to contribute to impactful educational products used by millions of students nationwide. Technology stack Languages & Frameworks: Node.js, JavaScript, React.js APIs: RESTful APIs, GraphQL Data Stores: PostgreSQL, MongoDB Cloud & Infrastructure: AWS (AppSync, Lambda), Serverless, Terraform, Datadog Responsibilities Design, implement, and maintain scalable, high-performance solutions using JavaScript / TypeScript Lead technical decisions in Node.js backend development and modern frontend frameworks (e.g. React) Identify and resolve performance, scalability, reliability, and security issues across complex systems Participate in and drive code reviews, architectural discussions, and technical improvements Improve system observability, monitoring, logging, and error handling Ensure high code quality through testing, documentation, and CI/CD practices Requirements 10+ years of professional software development experience 5+ years of experience with Node.js 2+ years of experience with a modern frontend framework (e.g. React) Experience with database technologies (ideally NoSQL DBs and MongoDB) Experience deploying production systems in the cloud (AWS) Experience (professional or personal) with using and integrating the latest AI coding technologies: e.g., LLMs, Model Context Protocol, Claude Code, GitHub Copilot Strong problem - solving ability and experience working within complex systems and large code bases Strong communication and collaboration skills, and the ability to work in a self-driven way Nice to have Ukrainian language proficiency What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Long-term opportunity for a Middle/Senior Full Stack Developer to design, develop, and optimize a live educational platform using Node.js and React.js. The role covers both frontend and backend development, system architecture, integrations, and DevOps within a mature product continuously enhanced for performance and security. 🗂️ Requirements: 4+ years of professional software development experience, 4+ years of hands-on JavaScript frontend development, Strong knowledge of React.js, Strong knowledge of Node.js, Strong knowledge of NestJS, Experience with PHP, Experience with AWS, Experience with Docker, Experience with MySQL, Confident use of Git 📃 Skills: JavaScript, React.js, Node.js, NestJS, PHP, AWS, Docker, MySQL, Git, Salesforce, Contentful, Kubernetes, GraphQL, Jenkins, CI/CD 🏢 Description: Project overview The project is live and has been actively developed for over 5 years, with continuous feature enhancements and security improvements. All development is carried out on our side. Our client is a US‑based nonprofit organization developing an educational platform that supports students in learning computer science and building coding projects. The platform provides curriculum materials, teaching tools, progress tracking, collaboration features, and portfolio‑building capabilities. The mission of the platform is to help close the gender gap in the tech industry. Position overview We are looking for a Strong Middle/Senior Full Stack Developer (Node.js + React.js) to join our dynamic team. You will be involved in the design, development, and optimization of both frontend and backend functionality, working closely with a cross‑functional team on a long‑term product. Responsibilities Develop and maintain platform features using Node.js, React.js, and NestJS Participate in system design, architecture discussions, and technical decision‑making Improve platform performance, scalability, and security Implement integrations with third‑party systems (e.g., Salesforce, Contentful) Work closely with product managers, designers, and QA to deliver high‑quality features Write clean, maintainable, and well‑tested code Participate in code reviews and provide constructive feedback to the team Contribute to DevOps processes using AWS, Docker, and CI/CD tools Troubleshoot, debug, and resolve technical issues in both frontend and backend components Support continuous enhancement and modernization of the long‑running project Requirements 4+ years of professional software development experience 4+ years of hands‑on experience with JavaScript for frontend development Strong knowledge of: React.js, Node.js, NestJS Experience with PHP Experience working with AWS and Docker Experience with MySQL Confident use of Git Nice to have Solid understanding of Kubernetes Experience with GraphQL Familiarity with Jenkins and CI/CD automation Experience integrating with Salesforce and Contentful What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Senior JavaScript React Developer role focused on building and maintaining high-performance frontend solutions for large-scale, multi-country eCommerce platforms. The position involves developing modern applications with React.js and Next.js, contributing to a multisite Drupal transition, and driving best practices across the full development lifecycle. The role requires close collaboration with cross-functional and international teams in a hybrid work setup. 🗂️ Requirements: Strong experience with React.js and Next.js (SSG/SSR, i18n, performance optimization), Proficiency in JavaScript and TypeScript, Strong knowledge of HTML5, CSS/SCSS, Tailwind, Experience with REST and GraphQL APIs, Experience with Git and CI/CD pipelines, Knowledge of Docker and Kubernetes, Experience with cloud platforms (AWS or Azure or GCP), Understanding of headless or decoupled architecture, Experience with performance optimization and scalable frontend architecture, Knowledge of WCAG accessibility standards, Experience working in Agile/Scrum environment, English level B2 or higher 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML5, SCSS, Tailwind, REST, GraphQL, Git, Jira, Figma, Confluence, Docker, Kubernetes, GitLab, AWS, Azure, GCP, Drupal, jQuery, CI/CD, WCAG, Scrum, AJAX 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. For our client, we are looking for a Senior JavaScript React Developer to join our client's Website & eCommerce team. In this role, you will be responsible for building and maintaining modern, high-performance frontend solutions using React.js and Next.js. You will collaborate closely with designers, backend developers, and international stakeholders while driving best practices across the development lifecycle. You will play a key role in the evolution of large-scale, multi-country digital platforms and contribute to the transition toward a new multisite Drupal platform planned for 2026. Project information: Location: Warsaw, Poland Work Setup: Hybrid work (2 - 3 days/ week in the office) Rate: 125 PLN/net/h + VAT (B2B contract) Language: English (B2+ Required) Start date: depending on candidate availability Project scope: Develop and maintain frontend components using React.js and Next.js (SSG/SSR, i18n, performance optimization) Build and support custom CMS modules, plugins, and integrations Contribute to all phases of the software development lifecycle: design, development, testing, deployment, and maintenance Drive and promote best practices, including test-driven development, CI/CD, SCRUM, refactoring, and code standards Collaborate closely with UX/UI designers and frontend/backend developers to deliver intuitive and visually appealing user experiences Ensure website content is easily editable by non-technical users Optimize applications for performance, scalability, and accessibility (WCAG) Work with distributed international teams and key stakeholders Stay up to date with emerging frontend technologies and industry trends Requirements: Technical Skills: Frontend: Strong skills in React.js and Next.js (SSG/SSR, i18n, performance optimization). Languages: JavaScript/TypeScript, HTML5, SCSS/Tailwind. APIs: REST, GraphQL. Tooling: Jira, Git, Figma, Confluence. Architecture (Preferred): Headless, Decoupled, Micro Frontends, Component-based design. Cloud & DevOps: Docker, Kubernetes, GitLab CI/CD, AWS/Azure/GCP. Competences: Strong front-end skills: HTML, CSS, JavaScript, jQuery, plus modern frameworks (React, Next.js). Understanding of the entire web development process (design, development, deployment). Good understanding of asynchronous request handling, partial page updates, and AJAX. Proficient in cross-browser compatibility and scalable application design principles. Experience with data migration, transformation, and scripting. Familiarity with Agile and Scrum methodologies. Prior experience with digital accessibility (WCAG) We offer: Full-time job agreement based on B2B Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Senior React Developer with AWS role focused on designing and architecting scalable, cloud-native web applications for digital banking platforms using React, TypeScript, and AWS in an on-site model in Warsaw. The position involves leading technical decisions, building serverless solutions, and supporting cloud migration initiatives. The role combines hands-on development with architectural guidance in a modern, microservices-driven environment. 🗂️ Requirements: 8+ years of software engineering experience, Strong expertise in React, Strong expertise in TypeScript, Hands-on experience with AWS (Lambda, Batch, CloudWatch), Proficiency in Terraform or other Infrastructure-as-Code tools, Experience with relational and non-relational databases (MongoDB, ElasticSearch, S3), Knowledge of RESTful API design and development, Bachelor’s degree in Computer Science, Engineering, Mathematics or related field, Fluent Polish and English, Legal right to work in Europe 📃 Skills: React, TypeScript, AWS, Lambda, Batch, CloudWatch, Terraform, MongoDB, ElasticSearch, S3, REST, CI/CD, Serverless, Microservices 🏢 Description: Empower the Future of Financial Technology — Design Scalable, Cloud-Native Applications with React and AWS Warszawa-based opportunity with on-site work model As a Senior React Developer with AWS , you will be working for our client, a global leader in financial technology dedicated to transforming the industry with innovative, cloud-native web solutions. Join this high-impact project to shape the future of digital banking platforms, leveraging AI, microservices, and modern development practices. Be a vital part of a forward-thinking environment driving cutting-edge cloud migration strategies, delivering scalable and high-performance systems across international markets. Your main responsibilities: Architect and engineer modern web applications using React, TypeScript, and AWS services Lead technical decision-making and provide architectural guidance to the development team Develop and maintain serverless solutions utilizing AWS Lambda, Batch, and CloudWatch Write Infrastructure-as-Code with Terraform to streamline deployment and infrastructure management Collaborate with designers, product managers, and stakeholders to translate requirements into robust solutions Support migration of legacy systems toward cloud-native, React-based architectures Optimize CI/CD pipelines for automated, efficient deployment Work with cloud storage solutions such as S3, MongoDB, and ElasticSearch You're ideal for this role if you have: 8+ years of practical software engineering experience Strong expertise in React and TypeScript Hands-on experience with AWS services, especially Lambda, Batch, and CloudWatch Proficiency with Terraform or similar Infrastructure-as-Code tools Solid understanding of relational and non-relational databases (MongoDB, ElasticSearch, S3) Knowledge of RESTful API design and development Excellent communication skills to engage with non-technical stakeholders Bachelor's degree in Computer Science, Engineering, Mathematics, or related field It is a strong plus if you have: Experience with CI/CD pipelines Familiarity with serverless architecture best practices Knowledge of AI development tooling in cloud environments Language Required for the role: Fluent in Polish and English Eligibility to work in: Only candidates with an existing legal right to work in Europe will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Long-term opportunity for a Strong Middle/Senior Full Stack Developer (Node.js + React.js) to design, develop, and optimize a live educational platform. The role involves full-stack feature development, system design participation, third-party integrations, and performance, scalability, and security improvements. You will work on a mature product with continuous enhancements using modern cloud and DevOps practices. 🗂️ Requirements: 4+ years professional software development experience, 4+ years frontend experience with JavaScript, Strong knowledge of React.js, Strong knowledge of Node.js, Strong knowledge of NestJS, Experience with PHP, Experience with AWS, Experience with Docker, Experience with MySQL, Proficient with Git 📃 Skills: JavaScript, React, Node.js, NestJS, PHP, AWS, Docker, MySQL, Git, CI/CD, Salesforce, Contentful, Kubernetes, GraphQL, Jenkins 🏢 Description: Client Our client is a US‑based nonprofit organization developing an educational platform that supports students in learning computer science and building coding projects. The platform provides curriculum materials, teaching tools, progress tracking, collaboration features, and portfolio‑building capabilities. The mission of the platform is to help close the gender gap in the tech industry. Project overview The project is live and has been actively developed for over 5 years, with continuous feature enhancements and security improvements. All development is carried out on our side. Position overview We are looking for a Strong Middle/Senior Full Stack Developer (Node.js + React.js) to join our dynamic team. You will be involved in the design, development, and optimization of both frontend and backend functionality, working closely with a cross‑functional team on a long‑term product. Responsibilities Develop and maintain platform features using Node.js, React.js, and NestJS Participate in system design, architecture discussions, and technical decision‑making Improve platform performance, scalability, and security Implement integrations with third‑party systems (e.g., Salesforce, Contentful) Work closely with product managers, designers, and QA to deliver high‑quality features Write clean, maintainable, and well‑tested code Participate in code reviews and provide constructive feedback to the team Contribute to DevOps processes using AWS, Docker, and CI/CD tools Troubleshoot, debug, and resolve technical issues in both frontend and backend components Support continuous enhancement and modernization of the long‑running project Requirements 4+ years of professional software development experience 4+ years of hands‑on experience with JavaScript for frontend development Strong knowledge of: React.js, Node.js, NestJS Experience with PHP Experience working with AWS and Docker Experience with MySQL Confident use of Git Nice to have Solid understanding of Kubernetes Experience with GraphQL Familiarity with Jenkins and CI/CD automation Experience integrating with Salesforce and Contentful

🏢 Summary: Frontend engineering role focused on building scalable, high-performance web applications using React and Next.js. The position involves developing modern user interfaces, collaborating with cross-functional teams, and contributing to shared component architecture and development practices. Suitable for mid-level to senior developers with strong web development experience. 🗂️ Requirements: 5+ years frontend/web development experience, Strong experience with React, Strong experience with TypeScript, Experience with Next.js or similar framework, Understanding of performance and scalability principles, Experience integrating APIs and backend services, Experience with Git version control, Experience with CI/CD pipelines 📃 Skills: React, Next.js, TypeScript, JavaScript, HTML, CSS, REST, Git, CICD, Jest, Playwright, Cypress, Cloud 🏢 Description: Web Frontend Engineer (React / Next.js) Do you want to help shape modern, scalable web applications used by thousands of businesses worldwide? Our client is looking for a skilled frontend developer with a strong focus on web technologies — especially React and Next.js — to help drive the development of high-quality, user-centric solutions. About the Role In this role, you will play a key part in building and evolving our clients web-based user interfaces. You’ll work closely with product managers, UX designers, and backend engineers to deliver performant, scalable, and intuitive solutions that create real value for customers. We are looking for developers across different seniority levels — both experienced profiles and developers with 5–10 years of experience who are eager to grow and take ownership. Key Responsibilities Develop and maintain modern web applications using React, Next.js, and TypeScript Build reusable components and scalable frontend architecture Collaborate closely with product and design teams to translate requirements into high-quality user experiences Ensure performance, accessibility, and responsiveness across applications Contribute to and evolve shared component libraries and design systems Participate in code reviews and contribute to improving development practices Work with CI/CD pipelines and modern development workflows Stay updated on frontend trends, tools, and best practices Key Requirements Solid experience with React and TypeScript in a web context Experience with Next.js or similar frameworks is highly preferred 5+ years of experience in frontend/web development (we are open to mid-level and senior profiles) Strong understanding of modern web development principles (performance, scalability, component architecture) Experience working with APIs and integrating backend services Familiarity with version control (Git) and CI/CD pipelines A collaborative mindset and strong communication skills Motivation to learn, improve, and contribute to a strong engineering culture Nice to Have Experience with design systems and component libraries Knowledge of testing frameworks (e.g., Jest, Playwright, Cypress) Experience with performance optimization and monitoring Exposure to cloud environments and modern deployment setups

🏢 Summary: Development role focused on building and modernizing a large-scale, microservice-based ticket sales platform running on AWS. The position involves backend development in .NET 7/8, creating new features and refactoring existing components within an Agile environment. It offers strong engineering practices, continuous integration, and collaboration within multiple backend squads. 🗂️ Requirements: 3–5 years of backend development experience, 3–5 years of commercial development on .NET platform, Strong knowledge of C#, Practical experience with AWS, Understanding of Clean Code and OOP, Knowledge of SOLID principles, Experience with WebAPI, Understanding of microservices architecture, Experience with unit testing (e.g., nUnit), Experience with mocking frameworks (e.g., Moq), Experience with dependency injection (e.g., Autofac), Knowledge of Entity Framework or NHibernate, Experience with DBMS systems, Understanding of Agile methodology, Good spoken English 📃 Skills: .NET, C#, AWS, REST, WebAPI, Microservices, nUnit, Moq, Autofac, EntityFramework, NHibernate, Postgres, DynamoDB, MSSQL, RDS, CI 🏢 Description: Client Our client is one of the regional leaders in the industry and is currently launching a new product—an international platform for ticket sales. The company’s annual revenue exceeds €100 million. Join a great company, not merely an individual project Project overview The client uses various tools to reach their customers, such as a mobile app, a responsive web application, or communicating with them directly through the call center. The system is big and modular (microservice-based), complying with a number of regulations. We provide APIs for different clients including the biggest Global Distribution Systems (GDSes). We also provide solutions that are labeled by more than half of Train Operating Companies (TOCs) in the UK. Our client is committed to ensuring that the system will be as modern as possible. It is based on a microservice architecture with the use of continuous integration, where a few hundred components operate independently of each other and can be used as they become available. This increases the modularity of the system and optimizes the use of the services. All components run on AWS. The backend also includes .NET 7/8, and REST API is actively modernized to Cloud Native solutions (RDS like Postgres, DynamoDB) from MSSQL. The client has a policy to work with the latest technology, and they move to newer versions when they are available. Team Several independent teams are working on the project. The goals of each team are limited to the part of the system they're working on. DataArt's specialists are working on the backend in several teams. The project has a team of 30+ .NET developers who work on the backend, divided into smaller squads. Position overview DataArt is currently helping develop new features and modernize the IT system of an independent online railroad ticket retailer. The project is a great place to work and grow for Middle engineers due to strong engineering practices (microservices, clean code, extensive unit testing, CI, dozens of production deployments weekly, the Scout Rule, code reviews, and an Agile approach), continuous technical refactoring, and a senior team that is willing to learn and share experience. Responsibilities Development of new features, expanding the ticket-selling system + refactoring 80-90% backend development 20-10% team meetings Requirements From 3 to 5 years of backend development experience From 3 to 5 years of experience in commercial software development on the .NET platform Understanding of and experience working with C# Good understanding of Cloud - AWS practical experience mandatory Strong skills in Clean Code and OOP Understanding of SOLID principles Knowledge of WebAPI Understanding of microservices architecture Experience with unit testing (like nUnit) and mocking frameworks (preferred Moq) Experience with dependency injection (preferred Autofac) Knowledge of Entity Framework or NHibernate Experience working with any DBMS system Understanding of Agile development methodology Good spoken English What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Lead Frontend Developer role in a large-scale global e-commerce project focused on expanding platform capabilities such as returns management, notifications, and dedicated customer and merchant portals. The position combines frontend architecture leadership with hands-on React and TypeScript development, ensuring high performance, quality, and security. You will work in an agile environment, collaborating across teams and supporting production systems. 🗂️ Requirements: 5+ years of frontend development experience, Expertise in React, Strong knowledge of TypeScript, Strong understanding of modern JavaScript frameworks, Experience with responsive design, Knowledge of web accessibility standards, Experience with CI/CD pipelines, Experience with frontend testing tools, Ability to lead frontend architecture and development, Legal work permit in Poland 📃 Skills: React, TypeScript, JavaScript, CI/CD, Scrum, Accessibility, HTML, CSS, Testing 🏢 Description: Project info You will be joining a major project focused on the evolution of a global e-commerce ecosystem. The scope is dynamic and involves expanding a large-scale platform with new capabilities. As the project moves past its initial kickoff, the team is focusing on delivering high-value features for both merchants and end-customers. Key areas of focus include: Feature Development: Building Returns Management, Notifications, White Label capabilities, and developing dedicated Customer and Merchant portals. Agile Governance: Active participation in Program Increment (PI) planning, release tracking, backlog grooming, and the configuration/management of Scrum boards. Quality & Security: Ensuring system robustness through Security, Vulnerability, and Penetration testing, as well as Performance and Stress testing. Support & Maintenance: Providing development support for the application on production, covering bug fixes and developing enhancements, along with end-user documentation and training. Lead frontend architecture and development Ensure UI/UX consistency and performance Collaborate with backend and design teams Drive adoption of modern frontend technologies Maintain code quality and testing standards Participate in on-call duties, additionally paid 5+ years of frontend development experience Expertise in React, TypeScript, and modern JS frameworks Strong understanding of responsive design and accessibility Experience with CI/CD and frontend testing tools Must possess a legal work permit in Poland General benefits - depends on the form of employment Hybrid work model combining office & remote work Attractively located office with collaboration spaces Onsite parking space for employees Referral program with financial bonus Life Insurance Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits: Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion Health benefits: Private medical care - Platinum Package