Full-Stack Developer

🏢 Summary: Full-time Senior Full Stack Developer role focused on building scalable, data-driven platforms for financial and enterprise sectors using Node.js and React. The position involves designing microservices, developing RESTful APIs, and creating responsive front-end applications in a hybrid work model (Warsaw). 🗂️ Requirements: 5+ years experience as Senior Full Stack Developer, Strong expertise in Node.js, Strong expertise in React, Experience with Express.js, Experience building RESTful or GraphQL APIs, Knowledge of OAuth and JWT authentication, Proficiency in Redux, HTML5, CSS3, ES6+, Experience with Vite, Webpack or Babel, Experience with MySQL or PostgreSQL, Experience with AWS, Azure or GCP, Experience with Docker and Kubernetes, Proficiency with Git 📃 Skills: Node.js, React, Express.js, GraphQL, REST, OAuth, JWT, Redux, HTML5, CSS3, JavaScript, ES6, Vite, Webpack, Babel, MySQL, PostgreSQL, AWS, Azure, GCP, Docker, Kubernetes, Git, SQL, MongoDB, CI/CD 🏢 Description: Senior Full Stack Developer (Node.js + React) 💰 Salary: 23,000-24,800 PLN/Month 💻 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) 🕦 Full-time ☑️ B2B or CoE We’re looking for a Senior Full-Stack Developer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors. Requirements: 5+ years of experience as a Senior Full Stack Developer with significant expertise in Node.js and React. Strong experience in building server-side applications using Node.js and Express.js. Hands-on experience with API development and integration, particularly with GraphQL or RESTful services. Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based). Front-end proficiency in React.js, Redux, HTML5, CSS3, and modern JavaScript (ES6+). Familiarity with front-end build tools such as Vite, Webpack, and Babel. Strong experience with databases such as MySQL and  PostgreSQL. Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes. Strong experience using Git and version control systems. Proficiency in English (both written and spoken). Key Responsibilities: Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js. Develop and maintain interactive, responsive user interfaces using React.js, Redux, and modern JavaScript (ES6+). Lead the design and implementation of scalable architectures and microservices. Work closely with database engineers to design efficient schemas and manage data interactions using SQL databases or MongoDB. Ensure reliable deployments and smooth release of updates using CI/CD pipelines and Docker. Write unit and integration tests and optimize performance to ensure high-quality code. Collaborate closely with cross-functional teams to define and implement technical solutions. Improve system performance, reliability, and long-term maintainability through optimization and best practices. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 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 Java / Full-Stack Developer role focused on designing, implementing, and maintaining modern applications within a mature software architecture. The position involves backend development in Java, frontend work with modern frameworks, and participation in the full software lifecycle in an agile environment. Optional responsibilities include software architecture design, CI/CD pipeline development, and technical leadership. 🗂️ Requirements: Degree in Computer Science or equivalent professional experience, Strong professional experience in modern application development, Very good knowledge of Java and backend web services, Experience with relational and transactional databases, Experience with automated unit or integration testing, Practical experience with agile methodologies, Familiarity with Git or SVN and collaboration tools like Jira and Confluence, Solid understanding of architecture standards and best practices, English proficiency at minimum B2 level 📃 Skills: Java, SQL, REST, Angular, React, Git, SVN, Jira, Confluence, CI/CD, Cloud, JUnit, API, Databases 🏢 Description: We are looking for a Senior Java / Full-Stack Software Developer ! We offer: Salary: 150-180 PLN net/hour on B2B. Remote work from Poland. Responsibilities: ·       Design and implement new features and requirements in Java ·       Integrate solutions into an existing, mature software architecture ·       Participate in all phases of the software lifecycle: ­   Planning and technical conception ­   Implementation and testing ­   Maintenance and operational support ·       Ensure quality, stability, and maintainability of the software ·       Develop backend components (Java, databases, services, APIs) ·       Contribute to modern frontend development (e.g. Angular, React) ·       Actively collaborate within an agile, cross-functional team ·       Apply architectural standards, best practices, and clean code principles Optional: Architecture Responsibilities (Senior / Architect Track) Depending on experience and interest, you may additionally: ·       Design and further develop the overall software architecture ·       Select appropriate frameworks, tools, and cloud solutions ·       Take responsibility for complex systems and end-to-end solutions ·       Shape CI/CD pipelines and technical standards ·       Act as a technical point of contact and mentor for the team We are looking for: ·       Degree in (Business) Computer Science, or vocational training as IT Specialist, or comparable professional experience ·       Strong professional experience in developing modern applications · Very good knowledge of Java, including backend and web services ·       Experience with relational and transactional databases ·       Experience with automated tests (unit and/or integration tests) ·       Practical experience with agile development methodologies ·       Familiarity with version control and collaboration tools (e.g. Git/SVN, Jira, Confluence, common IDEs) ·       Solid understanding of architecture standards and best practices · English language skills (written and spoken), minimum B2 ·       Ability to work independently ·       Team-oriented mindset and customer-focused thinking Nice to Have: ·       Experience with Angular, React, or similar frontend frameworks ·       Exposure to financial systems or securities trading ·       Experience with CI/CD pipelines and cloud-based architectures ·       Background in long-lived enterprise or regulated systems Ta rola nie jest dla Ciebie, ale masz znajomego, który by się sprawdził? Poleć go i zgarnij nawet 5000 zł. Referral Program: Talent from your network Don't hesitate and apply now!

🏢 Summary: Mid/Senior Full-Stack Developer role focused on developing and maintaining a modern web platform for accountants and bookkeepers. The position involves working remotely in a bilingual (English/Polish) environment using a TypeScript-based stack to build and enhance scalable software solutions. The role emphasizes high-quality development, collaboration, and solving complex technical challenges. 🗂️ Requirements: Commercial experience as Full-Stack Developer (Mid or Senior level), Strong proficiency in TypeScript, Hands-on experience with Angular, Hands-on experience with Nest.js, Experience with Redis or Valkey, Basic knowledge of SQL, Proficiency with Git, Fluency in English, Fluency in Polish 📃 Skills: TypeScript, Angular, NestJS, Redis, Valkey, SQL, Git 🏢 Description: Opis stanowiska Full-Stack Developer odgrywa kluczową rolę w rozwoju naszego oprogramowania. Stanowisko oferuje możliwość pracy w dwujęzycznym środowisku — angielskim i polskim — z wykorzystaniem nowoczesnego stosu technologicznego. Wybrana osoba dołączy do współpracującego, zdalnego zespołu, który koncentruje się na tworzeniu wysokiej jakości rozwiązań. Cenimy osoby proaktywne, pasjonujące się tworzeniem solidnych aplikacji webowych oraz lubiące rozwiązywać złożone problemy. O TaxCalc | Engager „TaxCalc | Engager” to zaawansowana platforma software’owa stworzona w celu uproszczenia i optymalizacji codziennych zadań księgowych oraz biur rachunkowych. Platforma obejmuje szeroki zakres funkcjonalności, w tym zarządzanie praktyką, CRM, przygotowywanie sprawozdań finansowych oraz kalkulację podatków. Naszą misją jest dostarczanie innowacyjnych narzędzi usprawniających workflow i poprawiających relacje z klientami, umożliwiając użytkownikom skupienie się na dostarczaniu najwyższej wartości. Poszukujemy doświadczonego Full-Stack Developera, który pomoże kształtować przyszły rozwój naszej platformy. Poziom doświadczenia Mid / Senior Wymagane umiejętności TypeScript Angular Nest.js Redis / Valkey Podstawowa znajomość SQL Git Mile widziane React Python Markdown GitHub Actions MySQL PostgreSQL Znajomość wzorców projektowych, w tym wzorców mikroserwisowych Umiejętności miękkie Biegła znajomość języka angielskiego i polskiego Otwartość, proaktywność Nastawienie na rozwiązywanie problemów Wynagrodzenie £3,000 – £4,000 miesięcznie (wyłącznie B2B)

🏢 Summary: Short-term B2B contract for a Fullstack Developer (Node.js + TypeScript) to build and maintain backend services for a regulated digital capital market platform in the fintech domain. The role focuses on developing scalable APIs, integrating KYC/AML providers, and implementing authentication, authorization, and investor management features. The project emphasizes code quality, security, and collaboration with cross-functional teams. 🗂️ Requirements: 3+ years commercial experience with Node.js, Strong knowledge of TypeScript, Experience building REST APIs, Experience with NestJS or similar framework, Experience with Prisma ORM or similar ORM, Understanding of authentication and authorization, Experience with relational databases, Experience writing automated tests, Knowledge of clean code principles, English for daily communication 📃 Skills: Node.js, TypeScript, NestJS, Prisma, REST, SQL, Jest, Supertest, Authentication, Authorization 🏢 Description: Description We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting-edge solutions and services that keep them at the forefront of innovation. FULLSTACK DEVELOPER B2B: 80-100 PLN / hour START - 1 JULY TERM - 6 WEEKS LOCATION: POLAND (REMOTE) *We offer a hybrid work model, allowing you to balance office presence with remote work. However, it's important to note that the role emphasizes a stronger presence in the office to foster teamwork and effective communication. Requirements Key Duties and Services: A Roadmap to Your Professional Success Your Mission : We are looking for a Fullstack Developer (Node. js + TypeScript) to join a fintech project focused on building a regulated digital capital market platform. The system supports investor onboarding, KYC/AML verification, investor classification, access control, audit logging, and digital wallet infrastructure. You will work closely with senior engineers and architects to build scalable backend services and integrations with fintech and blockchain-related providers. Scope of services: Developing and maintaining backend services using Node. js + TypeScript Building and extending REST APIs for onboarding, authentication, and user management Integrating external KYC/AML and identity verification providers Implementing business logic for investor classification and access control Creating and maintaining database models using Prisma ORM Writing unit and integration tests (Jest, Supertest) Participating in code reviews and technical discussions Collaborating with frontend, mobile, QA, and product teams Supporting code quality, security, and system reliability Here’s the set we are required: 3+ years of commercial experience with Node. js backend development Strong knowledge of TypeScript Experience building REST APIs and backend systems Experience with NestJS or similar frameworks Experience with Prisma ORM or similar Understanding of authentication & authorization concepts Familiarity with relational databases Experience writing automated tests (Jest, Supertest or similar) Strong understanding of clean code principles and best practices Good communication skills and English for daily cooperation Nice to have: Experience with class-validator / DTO-based validation Familiarity with GraphQL (Apollo) Experience in fintech / banking / regulated environments Knowledge of KYC/AML processes Exposure to blockchain, wallets, or digital assets Career Advancement at Your Fingertips: Explore Opportunities with Us By joining us you will get: Work on a modern fintech platform with real regulatory requirements Collaboration with experienced senior engineers and architects Opportunity to work with KYC/AML, identity systems, and fintech integrations Influence on system design and backend architecture decision A strong engineering culture focused on quality, security, and scalability Navigating the Hiring Process: What does the recruitment process for that position look like? HR Screening with Talent Acquisition Specialist (30 min) Technical Interview (60 min) Interview with Delivery Manager (30 min) Job Offer

🏢 Summary: Full-time Full Stack Software Engineer role focused on building AI-powered enterprise platforms using Java and React in a hybrid Warsaw setup. The position involves developing responsive front-end applications and scalable microservices-based back-end systems, integrating cloud services, and maintaining CI/CD pipelines. Long-term employment contract with emphasis on high-performance, secure, and maintainable solutions. 🗂️ Requirements: 5+ years experience as Full Stack Developer with Java and React.js, Strong proficiency in React.js and Redux, Strong knowledge of TypeScript, HTML5, CSS3, ES6+, Experience with state management and component-based architecture, Experience with UI libraries (Material-UI, Bootstrap, or Tailwind), Strong expertise in Java, Spring Boot, Hibernate, JPA, Experience building RESTful APIs and microservices, Knowledge of OAuth2, JWT, and session-based authentication, Experience with PostgreSQL or MySQL, Experience with MongoDB or Redis, Hands-on experience with CI/CD tools, Experience with AWS, Azure, or GCP, Experience with Docker and Kubernetes, Bachelor’s or Master’s degree in Computer Science or related field, Experience working in Agile environments 📃 Skills: Java, React, Redux, TypeScript, HTML5, CSS3, JavaScript, Spring, SpringBoot, Hibernate, JPA, REST, Microservices, OAuth2, JWT, PostgreSQL, MySQL, MongoDB, Redis, Jenkins, GitHub, GitLab, AWS, Azure, GCP, Docker, Kubernetes 🏢 Description: 💰 Salary: 21,000-22,000 PLN/month 🌎 Hybrid from Warsaw, Poland 🕦 Full-time position, long-term ☑️ Contract of Employment We are looking for a Software Engineer to join our client, a technology company that builds AI-powered platforms and consulting solutions for enterprise operations, with a strong focus on the private capital sector. The company has over ten years of experience working with high-growth and PE-backed businesses, combining deep domain expertise with advanced technology to drive measurable results. Requirements: 5+ years of professional experience as a Full Stack Developer working with Java and React.js. Strong proficiency in React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript (ES6+). In-depth understanding of state management solutions and component-based design principles. Experience working with UI libraries/frameworks such as Material-UI, Bootstrap, or Tailwind CSS. Solid expertise in Java, Spring Boot, Hibernate, JPA, and building RESTful APIs. Experience designing and working with microservices architecture and API Gateway patterns. Knowledge of authentication and authorization approaches, including OAuth2, JWT, and session-based methods. Experience with relational databases (PostgreSQL, MySQL) as well as NoSQL solutions (MongoDB, Redis). Hands-on experience using CI/CD tools like Jenkins, GitHub Actions, or GitLab CI/CD. Familiarity with cloud platforms such as AWS, Azure, or GCP, along with containerization tools like Docker and Kubernetes. Bachelor’s or Master’s degree in Computer Science, Engineering, or a related discipline. Experience operating within Agile development environments. Strong analytical thinking and problem-solving abilities. Key Responsibilities: Build and develop dynamic, responsive, and high-performing user interface components using React.js, Redux, and modern JavaScript (ES6+). Ensure applications function consistently across different browsers while delivering a smooth user experience. Enhance front-end performance and apply best practices in UI/UX design. Design, develop, and maintain RESTful APIs and microservices using Java technologies such as Spring Boot, Hibernate, and JPA. Implement secure authentication, authorization, and effective data management solutions. Work with both relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB. Integrate external services, APIs, and cloud-based platforms into applications. Oversee deployment processes using CI/CD pipelines and containerization technologies like Docker and Kubernetes. Produce clean, efficient, and maintainable code in line with established best practices. Develop and maintain unit and integration tests for both front-end and back-end systems. Collaborate closely with UI/UX designers, product managers, and DevOps specialists. Take part in Agile/Scrum processes and support ongoing improvements to development workflows.

🏢 Summary: Senior Java Full-Stack Developer role for international projects, focused on end-to-end development of web applications in a cloud-based environment. The position involves backend and frontend development, design and testing activities, and collaboration within agile teams. It is a fully remote B2B contract with long-term cooperation. 🗂️ Requirements: Bachelor’s degree in Engineering, IT, Science, or related technical field, Minimum 5 years of commercial experience in corporate IT, Strong experience with Java and Java frameworks, Commercial experience with frontend technologies, Solid knowledge of JavaScript, HTML5, CSS3, Experience with Angular, Knowledge of databases and SQL, Experience with REST and SOAP web services, Experience with AWS or Azure, Knowledge of Clean Code principles, Experience with unit testing, Experience with source code management, Experience with CI/CD and automated deployments, Very good English (spoken and written), Experience in agile (Scrum) environments 📃 Skills: Java, Spring, JavaScript, HTML5, CSS3, Angular, SQL, REST, SOAP, AWS, Azure, CI/CD, Git, Scrum 🏢 Description: Senior Java Full-Stack Developer – Remote Contract type: B2B Hourly rate: 160–170 PLN/h Location: Remote We are looking for an experienced Senior Java Full-Stack Developer to join international implementation projects. The role involves end-to-end development of web applications, close collaboration with agile teams, and active participation in design and testing activities. The position is well suited for a developer who values clean code, quality, and teamwork in a cloud-based environment. Responsibilities Work as a Senior Java Full-Stack Developer across multiple implementation streams Develop and maintain web-based applications using Java and modern frontend technologies Write and maintain unit tests to ensure software quality Collaborate with agile team members to achieve project and client goals Participate in design reviews, testing activities, and technical discussions Requirements Bachelor’s degree in Engineering, IT, Science, or another technical field Minimum 5 years of commercial experience in a corporate IT environment Strong experience with Java and commonly used Java frameworks Commercial experience with frontend technologies and web-based applications Solid knowledge of JavaScript, HTML5, CSS3, and responsive single-page application design Experience with Angular Knowledge of databases and SQL Experience with web services and APIs (REST, SOAP) Experience deploying applications on cloud platforms such as AWS or Azure Knowledge of Clean Code principles and unit testing Experience with source code management, CI/CD, and automated deployments Very good English, both spoken and written Experience working in international and agile (Scrum) environments Strong communication and collaboration skills Nice to have Experience with Kafka or RabbitMQ Hands-on experience with microservices architecture Knowledge of Docker and Kubernetes Relevant certifications (Java, Spring, SQL, AWS, Azure) Knowledge of German or another European language Benefits Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance We offer Fully remote cooperation Competitive hourly rate: 160–170 PLN/h (B2B) Long-term cooperation in international projects Modern technology stack and agile working environment

🏢 Summary: Full-Stack Developer role on a long-term, enterprise-scale banking project, delivering web solutions using .NET and React in a regulated environment. The position involves end-to-end development, API integration, and database optimization within a global technology team. Work is fully remote from Poland with collaboration on complex financial systems. 🗂️ Requirements: 3+ years of full-stack development experience, Proficiency in C# and ASP.NET Core, Experience with .NET Web API, Strong knowledge of React including state management and component architecture, Experience with HTML5, CSS3, JavaScript or TypeScript, Experience designing and integrating RESTful APIs, Strong SQL Server skills including queries and stored procedures, Experience with Entity Framework, Knowledge of design patterns and database normalization, Experience with Azure DevOps for source control and CI/CD, Understanding of application security, performance, and scalability best practices, Bachelor's degree in Computer Science or related field 📃 Skills: C#, .NET, ASP.NETCore, WebAPI, React, HTML5, CSS3, JavaScript, TypeScript, REST, SQL, SQLServer, EntityFramework, AzureDevOps 🏢 Description: We are looking for an experienced Full-Stack Developer to join a long-term project for one of the world's leading professional services organizations. You will work within a global technology team delivering solutions for a UK-based banking client in a regulated, enterprise-scale environment. Location: 100% Remote (Poland) with occasional visits to Warsaw office Client: Global professional services firm, banking & financial services sector, UK Requirements 3+ years of experience in full-stack development, with proficiency in most of the following: C#, ASP.NET Core, .NET Web API React — state management, component architecture HTML5, CSS3, JavaScript / TypeScript RESTful API design and integration SQL Server — queries, stored procedures, functions, views Entity Framework Design patterns and database normalization Azure DevOps for source control and CI/CD Application security, performance, and scalability best practices Bachelor's degree in Computer Science or related field Nice to Have Azure Cloud Services and cloud-native architecture SFTP and encryption/secure file transfer protocols Experience with vendor software integration and custom interfaces Responsibilities Design, develop, and maintain web applications using .NET (C#, ASP.NET Core) and React Build responsive user interfaces with HTML, CSS, JavaScript, and React Develop and consume RESTful APIs to connect client-side and server-side components Implement and optimize data storage using SQL Server (stored procedures, functions, views) Perform coding, debugging, testing, and troubleshooting throughout the development lifecycle Maintain and enhance existing systems, fixing complex bugs and escalating risks where needed Capture detailed requirements from stakeholders and translate them into technical specifications Ensure adherence to coding standards, design patterns, and security best practices Collaborate with vendor teams and third-party integrations Monitor emerging technologies and contribute ideas for continuous improvement We Offer 100% remote work from Poland Occasional team meetups in Warsaw Long-term project with a prestigious international client Exposure to enterprise-scale banking solutions B2B Contract Private medical care ( Luxmed ) MultiSport sports card

🏢 Summary: Full-time, 100% remote Senior Frontend Developer role focused on building and scaling complex, responsive web applications powered by AI-driven platforms. The position involves architecting high-quality front-end solutions, integrating with back-end services, and ensuring performance, scalability, and cross-browser compatibility. The role also includes driving best practices, code quality, and modern front-end standards within the team. 🗂️ Requirements: Strong knowledge of HTML5, CSS3, JavaScript (ES6), Strong understanding of DOM, Experience with React.js, Experience with Material UI, Experience with Responsive Design and cross-browser compatibility, Familiarity with SASS or LESS, Understanding of BEM methodology, Knowledge of CSS-in-JS, Knowledge of browser storage (cookies, localStorage, sessionStorage), Proficiency with npm or yarn, Experience with Jest or equivalent testing frameworks, Understanding of SEO best practices, Familiarity with TypeScript, Knowledge of SSR and service workers, Experience with Webpack, Vite, or Rollup, Understanding of browser extensions integration 📃 Skills: HTML5, CSS3, JavaScript, ES6, DOM, React, MaterialUI, SASS, LESS, BEM, CSS-in-JS, cookies, localStorage, sessionStorage, npm, yarn, Jest, TypeScript, SSR, Webpack, Vite, Rollup, SEO, ServiceWorkers 🏢 Description: Senior Frontend Developer (100% remote) 💰 Salary: 20,000-23,000 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Frontend Developer for a partner client that helps businesses use artificial intelligence to run more efficiently and grow faster. The company builds and provides digital platforms and consulting services that enable organizations to manage operations, analyze data, and improve performance. Their solutions combine AI, automation, and deep business expertise to help clients simplify workflows, gain insights, and deliver greater value. Requirements: HTML5 , CSS3 , JavaScript (ES6) Strong understanding of the Document Object Model (DOM) Skilled in Responsive Design and cross-browser compatibility Experience with React.js and Material UI Familiarity with CSS preprocessors such as SASS or LESS Understanding of BEM methodology and CSS-in-JS approaches Knowledge of browser storage mechanisms (cookies, localStorage, sessionStorage) Proficient in using package managers (npm/yarn) Experience in unit testing using Jest or equivalent frameworks Understanding of SEO best practices Familiarity with TypeScript for type-safe, large-scale applications Knowledge of server-side rendering (SSR) and service workers Experience with code bundling and modern module bundlers (e.g., Webpack, Vite, Rollup) Understanding of browser extensions and their integration with web applications Responsibilities: Develop and maintain  complex, responsive user interfaces for large-scale web applications. Architect and integrate front-end components with back-end APIs and services , ensuring security, scalability, and performance. Drive the implementation of pixel-perfect UI/UX designs across browsers and devices. Provide technical mentorship to junior developers and guide the team in adopting modern best practices. Conduct code reviews , enforce standards, and maintain a clean, modular codebase. Evaluate and recommend new frameworks, tools, and libraries to enhance productivity. Manage project timelines, estimate development efforts, and collaborate effectively with cross-functional teams. Maintain comprehensive front-end documentation , design patterns, and style guides. Stay updated with industry trends , emerging technologies, and front-end innovations to continuously improve team capabilities. Participate in architectural discussions , ensuring long-term scalability and maintainability of the front-end ecosystem. Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Long-term remote B2B contract for an experienced Fullstack Developer focused on frontend refactoring with Angular and building scalable full-stack solutions in a distributed environment. The role involves developing and maintaining features across the stack, ensuring high code quality, and contributing to CI/CD and infrastructure processes. The project requires close collaboration with cross-functional teams and strong backend expertise in Java and Spring Boot. 🗂️ Requirements: EU citizenship, Residence in Poland, Strong experience with Angular v12+, Strong knowledge of TypeScript, Solid experience with Java, Experience with Spring Boot, Experience in frontend and backend development, Understanding of nginx and server configuration, Knowledge of clean code and refactoring principles, Communicative German (B1/B2) 📃 Skills: Angular, TypeScript, Java, SpringBoot, nginx, CI/CD, Docker, Kubernetes, Helm, Ingress, TLS, Cypress 🏢 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. We are seeking an experienced Fullstack Developer to join a remote development team. The role focuses on frontend refactoring and building scalable full-stack solutions in a distributed environment. Project information: Type of project: IT services Office location: Poland Work mode: Remote Budget: 110-150 PLN net/ h- b2b Project length: Long-term Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate’s availability) Project scope: Lead and execute frontend refactoring activities to improve structure, performance, and scalability Develop and maintain full-stack features in a distributed environment Collaborate closely with product owners, architects, and other engineers Ensure high-quality code through testing, code reviews, and best engineering practices Contribute to DevOps/CI/CD processes and infrastructure (if experienced) Competence demands: Strong experience with Angular (v12+) and TypeScript Good understanding of nginx, headers, and server configuration Solid experience with Java and Spring Boot Proven experience in both frontend and backend development Strong understanding of clean code and refactoring principles Communicative German skills (B1/B2) Nice to have : Experience with Docker, Kubernetes, Helm, Ingress Knowledge of Infrastructure & TLS concepts Knowledge of Cypress for automated testing We offer: Remote working model Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) Multisport card (also for an accompanying person) Life insurance