Senior Fullstack Engineer (TypeScript, Node.js, React.js)

🏢 Summary: Fullstack Engineer role focused on developing back-office and client solutions using Node.js and React technologies in a collaborative international environment. The position involves analyzing business requirements, building scalable applications, writing clean code and technical documentation, and supporting junior team members. Hybrid work in Warsaw with opportunities to work on modern technologies and enterprise projects. 🗂️ Requirements: 3+ years of Fullstack development experience, Master’s degree in Software Engineering or related field, Strong knowledge of Node.js and React, Experience with related frontend and backend frameworks, Familiarity with REST API and GraphQL, Knowledge of SQL and NoSQL databases, Understanding of software architecture and development principles, Fluent English level B2 minimum, Excellent verbal communication skills 📃 Skills: Node.js, React, ReactNative, Next.js, Redux, TypeScript, Bootstrap, MaterialUI, Nest.js, Fastify, Express, AWS, Bitbucket, Git, Jenkins, PostgreSQL, Docker, REST, GraphQL, SQL, NoSQL, Strapi 🏢 Description: About the opportunity We are seeking an experienced Fullstack Engineer (Node.js & React) to join our team and work on exciting projects for our key customers. In this role, you will have the opportunity to interface with clients and drive the development of their solutions. For instance, you will join the team working on a back-office solution for a global insurance industry leader using Strapi and React. As a software engineer, you will be responsible for delivering high-quality projects by defining technical requirements based on business needs and deploying clean code. You won't need to reinvent the wheel as we value the power of reusing open-source frameworks and solutions. To be successful in this position, you must have at least 3 years of experience in Fullstack development, a deep understanding of Node.js, React and related frameworks, and experience working collaboratively in a team environment. Key responsibilities - Analyzing business requirements - Writing clean, functional code, including unit tests - Writing technical documentation - Proposing technical improvements to the application - Growing and nurturing junior colleagues' skills - Supporting less experienced team members Competencies - Master’s degree in Software Engineering or related engineering field - Frontend Technologies: React, React Native, Next.js, Redux, Typescript, Bootstrap, Material UI - Backend Technologies: Node.js, Nest.js, Fastify, Express - Other Technologies: AWS, Bitbucket/GIT, Jenkins, PostgreSQL, Docker - Familiarity with REST API and GraphQL - Familiarity with SQL and NoSQL databases - Deep understanding of software architecture and development principles - Fluency in English is a must (min B2, C1 preferred) - Excellent verbal communication skills are a must - Can-do attitude - Great attention to detail - Independence and drive to grow and learn What we offer - Contract under Polish law: B2B or Umowa o Pracę - Benefits such as private medical care, group insurance, Multisport card - English classes available - Hybrid work (at least 3 days/week on-site) in Warsaw (Mokotów) - Opportunity to work with excellent professionals - High standards of work and focus on code quality - New technologies in use - Continuous learning and growth - International team - Pinball, PlayStation & more on-site Join a growing team of dedicated professionals focused on knowledge sharing, collaboration, and professional growth.

🏢 Summary: Senior Full Stack Engineer role focused on building and delivering scalable applications using Node.js and React in Agile environments. The position involves end-to-end SDLC ownership, architectural decision-making, collaboration with engineering teams and stakeholders, and support for mission-critical systems at scale. The offer includes hybrid work in Warsaw, international collaboration, and opportunities to work with modern cloud and development technologies. 🗂️ Requirements: 6+ years of commercial Full Stack development experience, Strong knowledge of JavaScript and TypeScript, Experience with Node.js and React, Experience working in Agile engineering environments, Master’s degree in Software Engineering, Computer Science, or related field, Experience with AWS, Docker, PostgreSQL, Git/Bitbucket, and Jenkins, Knowledge of REST APIs and GraphQL, Knowledge of SQL and NoSQL databases, Understanding of SDLC practices and Agile methodologies, Understanding of software architecture, scalability, design patterns, and SOLID principles, Experience leading technical projects and participating in architectural decisions, Fluent English communication skills (minimum B2), Experience working in customer-facing or international environments 📃 Skills: JavaScript, TypeScript, Node.js, React, ReactNative, Expo, Azure, AWS, Docker, PostgreSQL, Git, Bitbucket, Jenkins, REST, GraphQL, SQL, NoSQL, CI/CD 🏢 Description: About the job We are actively looking for a Senior Full Stack Engineer (Node.js & React). In this role, you will own technical responsibilities from conception to delivery. As a Senior Full Stack Engineer, you will collaborate closely with engineering teams, interact directly with customers and stakeholders, work on mission-critical systems at scale, and support the SDLC process end-to-end. This role requires a strong ownership mindset and readiness to take technical responsibility for project delivery, including participation in architectural discussions and technical decision-making. To be successful in this position, you should have at least 6 years of commercial experience in Full Stack development, strong understanding of Node.js, React, and related frameworks, and experience working within Agile engineering environments. Key responsibilities - Analyze business and technical functional and non-functional requirements - Design and develop clean, maintainable, and scalable code, including unit tests - Prepare and maintain technical documentation - Propose and implement technical improvements to applications and development processes - Participate in troubleshooting and resolving complex technical issues - Collaborate with other engineering teams to design and implement technical solutions - Contribute to architectural and technical decision-making processes - Support SDLC activities end-to-end, including development, testing, deployment, and production support - Take ownership of technical delivery Competencies - Master’s degree in Software Engineering, Computer Science, or related technical field - Must-have Technologies: JavaScript, TypeScript, Node.js, React - Advantage: React Native, Expo, Microsoft Azure - Fluency in English is required (minimum B2, C1 preferred) - Excellent verbal and written communication skills - Experience working with AWS, Docker, PostgreSQL, Git/Bitbucket, and Jenkins - Familiarity with REST APIs and GraphQL - Familiarity with SQL and NoSQL databases - Strong understanding of Agile methodologies and SDLC practices - Understanding of software architecture trade-offs, scalability considerations, design patterns, and SOLID principles - Leadership mindset: previous experience in technically leading projects, participating in architectural decision-making, and taking responsibility for the technical delivery process - Experience working in customer-facing or international environments Nice to have - Experience with CI/CD pipelines and deployment automation for web and mobile applications (e.g., EAS Build for Expo) - Experience in scaling applications and handling high-traffic workloads - Experience with cloud-native architectures and distributed systems - Familiarity with monitoring, observability, and production troubleshooting practices - Experience in fintech or insuretech environments What we offer - Contract under Polish law: B2B or Umowa o Pracę - Benefits such as private medical care, group insurance, Multisport card - English classes available - Hybrid work (at least 3 days/week on-site) in Warsaw (Mokotów) - Opportunity to work with excellent professionals - High standards of work and focus on the quality of code - New technologies in use - Continuously learning and growth - International team - Pinball, PlayStation & much more (on-site)

🏢 Summary: Senior Full Stack Engineer role focused on building and delivering scalable, mission-critical applications using Node.js and React. The position involves end-to-end ownership from design and architecture to deployment and production support within Agile environments. The role requires strong technical leadership, architectural involvement, and collaboration with cross-functional and customer-facing teams. 🗂️ Requirements: Minimum 6 years of commercial Full Stack development experience, Strong knowledge of Node.js and React, Proficiency in JavaScript and TypeScript, Experience working in Agile environments, Experience with AWS and Docker, Experience with PostgreSQL, Experience with Git or Bitbucket and Jenkins, Familiarity with REST APIs and GraphQL, Knowledge of SQL and NoSQL databases, Understanding of software architecture, design patterns, and SOLID principles, Experience with SDLC processes end-to-end, Fluency in English (minimum B2), Master’s degree in Computer Science, Software Engineering, or related field 📃 Skills: JavaScript, TypeScript, Node.js, React, AWS, Docker, PostgreSQL, Git, Bitbucket, Jenkins, REST, GraphQL, SQL, NoSQL, Azure, ReactNative, Expo 🏢 Description: About Webellian Webellian is a well-established Digital transformation and IT consulting company committed to creating a positive impact for our clients. We are driven by shared values, strong principles, and a passion for innovative and disruptive technologies. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the job We are actively looking for a Senior Full Stack Engineer (Node.js & React). In this role, you will own technical responsibilities from conception to delivery. As a Senior Full Stack Engineer, you will collaborate closely with engineering teams, interact directly with customers and stakeholders, work on mission-critical systems at scale, and support the SDLC process end-to-end. This role requires a strong ownership mindset and readiness to take technical responsibility for project delivery, including participation in architectural discussions and technical decision-making. To be successful in this position, you should have at least 6 years of commercial experience in Full Stack development, strong understanding of Node.js, React, and related frameworks, and experience working within Agile engineering environments. Key responsibilities Analyze business and technical functional and non-functional requirements Design and develop clean, maintainable, and scalable code, including unit tests Prepare and maintain technical documentation Propose and implement technical improvements to applications and development processes Participate in troubleshooting and resolving complex technical issues Collaborate with other engineering teams to design and implement technical solutions Contribute to architectural and technical decision-making processes Support SDLC activities end-to-end, including development, testing, deployment, and production support Take ownership of technical delivery Competencies Master’s degree in Software Engineering, Computer Science, or related technical field Must-have Technologies: JavaScript, TypeScript, Node.js, React Advantage: React Native, Expo, Microsoft Azure Fluency in English is required (minimum B2, C1 preferred) Excellent verbal and written communication skills Experience working with AWS, Docker, PostgreSQL, Git/Bitbucket, and Jenkins Familiarity with REST APIs and GraphQL Familiarity with SQL and NoSQL databases Strong understanding of Agile methodologies and SDLC practices Understanding of software architecture trade-offs, scalability considerations, design patterns, and SOLID principles Leadership mindset: previous experience in technically leading projects, participating in architectural decision-making, and taking responsibility for the technical delivery process Experience working in customer-facing or international environments Nice to have Experience with CI/CD pipelines and deployment automation for web and mobile applications (e.g., EAS Build for Expo) Experience in scaling applications and handling high-traffic workloads Experience with cloud-native architectures and distributed systems Familiarity with monitoring, observability, and production troubleshooting practices Experience in fintech or insuretech environments What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 3 days/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site 🤫) Interested? Please click the “Apply for this job” button and send us your CV in English. Please include the following statement: I hereby authorize Webellian Poland Sp. z o.o. to the process personal data provided in this document for realising the recruitment process pursuant to the Personal Data Protection Act of 10 May 2018 (Journal of Laws 2018, item 1000) and in agreement with Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (General Data Protection Regulation).

🏢 Summary: 6-month Full Stack Engineer internship focused on building and supporting web applications using Node.js and React. The role involves collaborating with the engineering team across the full development lifecycle, from conception to delivery, contributing to clean code, testing, and technical documentation. 🗂️ Requirements: Enrolled in Bachelor’s or Master’s degree in Computer Science or related technical field, Familiarity with JavaScript, Familiarity with TypeScript, Familiarity with Node.js, Familiarity with React, Familiarity with REST API, Familiarity with GraphQL, Familiarity with SQL databases, Familiarity with NoSQL databases, Familiarity with AWS, Familiarity with Git or Bitbucket, Familiarity with Jenkins, Familiarity with PostgreSQL, Familiarity with Docker 📃 Skills: JavaScript, TypeScript, Node.js, React, REST, GraphQL, SQL, NoSQL, AWS, Git, Bitbucket, Jenkins, PostgreSQL, Docker 🏢 Description: About Webellian Webellian is a well-established Digital transformation and IT consulting company committed to creating a positive impact for our clients. We are driven by shared values, strong principles, and a passion for innovative and disruptive technologies. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the job We are actively looking for an intern Full Stack Engineer (Node.js & React). As an intern Full Stack Engineer you will collaborate with the engineering team, you will have the opportunity to help them from conception to delivery, on the ongoing projects. Requirements Being enrolled in a Bachelor’s or Master’s degree in Computer Science or a related technical field. Familiarity with: JavaScript, TypeScript, Node.js Familiarity with : React, React Native will be considered as a plus Familiarity with REST API and GraphQL Familiarity with SQL, NoSQL databases Good English skills (B2+), Polish is a plus Excellent verbal communication skills. Familiarity with other technologies: AWS, Bitbucket/GIT, Jenkins, PostgreSQL, Docker A grasp of software architecture trade-offs and considerations, an understanding of software development principles such as design patterns and SOLID concepts (Nice to have) Key responsibilities Help to write clean, functional code, including unit tests Help to write technical documentation Participate in troubleshooting and resolving technical issues Collaborate with the engineering team from conception to delivery What we offer 6 month internship Opportunity to work with excellent professionals, in a professional and friendly environment High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) About you: Open-minded and eager to learn Autonomous and not afraid to ask questions Business oriented and looking to bring solutions Capable of detailed and analytical thinking Ready to take responsibilities and have an impact on companies’ projects BE BOLD In your CV, please include the following information: Why would you like to join us? Do you have something to share with us? (portfolio, projects, ideas, …)

🏢 Summary: Full Stack Engineer role focused on building scalable distributed applications using Java and modern frontend technologies in an agile environment. The position involves backend and frontend development, microservices, testing, and collaboration with cross-functional teams in a hybrid work model in Warsaw. 🗂️ Requirements: Proven experience as a Full Stack Engineer, Strong experience with Java, Strong experience with Spring, Strong experience with Kafka, Strong understanding of TypeScript, Strong understanding of Angular, Experience with databases, Experience with distributed systems, Solid understanding of microservice architecture, Experience writing unit tests, Experience writing integration tests, Ability to work in agile delivery environments, Strong communication skills 📃 Skills: Java, Spring, Kafka, TypeScript, Angular, SQL, Microservices, Docker, Kubernetes, OpenAPI, Swagger, Atlas, DevOps, AI, MachineLearning 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are seeking a motivated and experienced Full Stack Engineer with a strong background in Java and distributed systems to join our dynamic team. The ideal candidates will have extensive expertise in developing scalable and maintainable applications in agile-based delivery environments, with a proactive approach to problem-solving. Key responsibilities: Design, develop, and maintain applications in a complex and interconnected environment. Participate in code reviews and contribute to a culture of continuous improvement. Analyze existing business logic and data structures across several systems. Collaborate with cross-functional teams to refine, design, and develop new features. Troubleshoot and resolve complex technical issues. Required Experience & Skills Proven experience as a Full Stack Engineer Ability to learn quickly and adapt to new technologies and methodologies. Strong communication skills. Strong experience with backend technologies (Java, Spring, Kafka). Strong understanding of front-end technologies (TypeScript, Angular). Experience with databases and distributed systems. Solid understanding of microservice architecture. Strong testing background and experience writing unit- and integration tests. Preferred Qualifications Familiarity with containerization and orchestration tools (e.g., Docker, Kubernetes). DevOps experience. Knowledge of Atlas or similar database migration tools. Familiarity with OpenAPI/Swagger specifications and code generation. Knowledge of AI and machine learning concepts. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Full Stack Drupal Engineer role focused on developing and maintaining e-commerce and corporate websites, including new B2C insurance platforms, using Drupal and external integrations. The position involves both frontend and backend Drupal development, multilingual implementations, plugin customization, and API integrations within Agile environments. 🗂️ Requirements: Minimum 3 years of commercial experience, Strong experience with Drupal (frontend and backend), Strong knowledge of PHP, Experience with external API integration, Experience with plugin selection, installation and customization in Drupal, Ability to create technical documentation, Experience with Agile/Scrum methodologies, Fluency in English 📃 Skills: Drupal, PHP, NodeJS, STRAPI, PIMCore, API, Agile, Scrum 🏢 Description: About the Webellian Webellian is a well-established Digital transformation and IT consulting company committed to creating a positive impact for our clients. We are driven by shared values, strong principles, and a passion for innovative and disruptive technologies. We are a community of truly passionate engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the project Currently we are looking for Full Stack Drupal Engineer to work on one of a few projects: 1. Continuous development of existing e-commerce websites of a global actor leader on his market 2. Implementation of new e-commerce websites in different countries and for different partners 3. Development of a corporate website for VIP concierge services provided by an multinational insurance company 4. Development of a new B2C insurance e-commerce website, strategic project for our client. Key responsibilities Creating a static part in Drupal Introducing multilingualism into the application Selection, installation and customization of plug-ins in Drupal necessary to deliver the project Usage of an external API for business requirements If the need arises, support for the creation of a plugin in Drupal for the needs of the project Creation of project documentation (user guide, dev guide, technical docs) Analysis of future requirements and proposal of solutions to extend the application Competencies Technologies: Drupal (FE, BE), PHP.  Knowledge of NodeJS, STRAPI, PIMCore would be a plus. At least 3 years of commercial experience Fluency in English is a must Great attention to detail Experience with Agile/Scrum methodologies is a must Excellent verbal communication skills are a must Independence and drive to grow and learn What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport Hybrid work in Warsaw Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site 🤫 ) I nterested? Please click the “Apply for this job” button and send us your CV in English. Please include the following statement: “I hereby authorize Webellian Poland Sp. z o.o. to process my personal and store data included in my job application for the needs of following and future recruitment processes (in accordance with the Personnel Protection Act 29.08.1997 no 133 position 883)”.

🏢 Summary: Senior Frontend Developer role focused on building AI-enabled web and iOS applications using React and Swift technologies. The position involves leading frontend architecture, performance optimization, testing strategies, and CI/CD integration while collaborating with cross-functional teams. Hybrid work in Warsaw with opportunities to work on modern technologies in an international environment. 🗂️ Requirements: 6+ years of frontend development experience, Expert-level JavaScript, Expert-level TypeScript, Expert-level React, Experience with Redux Toolkit or Zustand, Strong native iOS development with Swift, Experience with SwiftUI, Experience integrating REST APIs, Knowledge of OAuth2 and JWT authentication, Strong CSS and responsive design skills, Experience with Vite or Webpack, Hands-on experience with Claude Code, Experience with frontend testing frameworks, Ability to define frontend architecture and technical standards, Experience with CI/CD pipelines, Strong communication and collaboration skills 📃 Skills: JavaScript, TypeScript, React, Redux, Zustand, Swift, SwiftUI, UIKit, REST, OAuth2, JWT, CSS, Tailwind, StyledComponents, Emotion, Vite, Webpack, Jest, Vitest, Playwright, Cypress, XCTest, Fastlane, Xcode, CI/CD, SSR, CSR, ISR, WCAG 🏢 Description: About the position As a Senior Frontend Developer within Advanced Analytics, you will lead the design and development of user-facing AI-enabled products across web and mobile platforms. You will own the frontend layer of production applications — building sophisticated React-based web interfaces and native iOS mobile experiences that bring AI capabilities directly to end users across the globe. Key responsibilities: - Architect and build production-grade React web applications: component design, state management, routing, performance optimization, and accessibility (WCAG compliance). - Develop native iOS applications using Swift and SwiftUI (or UIKit where required), delivering high-quality, App Store-ready mobile experiences. - Define and enforce frontend architecture standards: folder structure, component libraries, design system integration, and code quality conventions across web and mobile. - Integrate frontend applications with REST APIs and event-driven backends, handling authentication flows, error boundaries, loading states, and real-time data patterns. - Implement robust frontend testing strategies: unit tests (Jest, Vitest), component tests (React Testing Library), end-to-end tests (Playwright or Cypress), and iOS XCTest suites. - Lead frontend performance engineering: bundle optimization, lazy loading, rendering strategies (SSR, CSR, ISR), Core Web Vitals, and iOS app performance profiling. - Own the mobile development lifecycle on iOS: from Xcode project configuration and provisioning profiles to TestFlight distribution and App Store submission. - Collaborate with UX Designers to translate designs into pixel-perfect, responsive, and accessible interfaces on both web and iOS. - Champion AI-augmented development workflows using Claude Code: apply it actively for prototyping, code review, refactoring, and documentation generation. - Conduct thorough code reviews, contribute to architectural decision records (ADRs), and mentor junior and mid-level frontend engineers. - Work with DevOps to integrate frontend build and deployment into CI/CD pipelines: web app deployments, iOS build automation (Fastlane), and release management. Required Experience & Skills - 6+ years of professional frontend development experience, with a strong track record of shipping production applications at scale. - Expert-level JavaScript and TypeScript: deep understanding of the language, async patterns, module systems, and type-safe application design. - Expert-level React: hooks, context, state management (Redux Toolkit, Zustand, or equivalent), performance patterns, and large-scale component architecture. - Strong native iOS development skills using Swift and SwiftUI; experience with UIKit is a plus. - Solid experience with iOS-specific concerns: push notifications, background processing, Keychain, deep linking, and App Store review guidelines. - Experience consuming and designing frontend integrations with REST APIs, including authentication (OAuth2, JWT), error handling, and data caching strategies. - Strong CSS and layout skills: responsive design, CSS-in-JS (Styled Components, Emotion), or utility-first frameworks (Tailwind CSS). - Experience with frontend build tooling: Vite, Webpack, or equivalent; understanding of bundling, tree-shaking, and deployment optimization. - Hands-on proficiency with Claude Code: using it daily for development, debugging, refactoring, and documentation tasks. - Proven ability to define architecture, set standards, and lead technical decisions in a senior individual contributor or tech lead capacity. - Strong communication skills: able to collaborate effectively with designers, product managers, and backend engineers across global, distributed teams. What we offer - Contract under Polish law: B2B or Umowa o Pracę - Benefits such as private medical care, group insurance, Multisport card - English classes available - Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) - Opportunity to work with excellent professionals - High standards of work and focus on the quality of code - New technologies in use - Continuously learning and growth - International team - Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply.

🏢 Summary: Senior Frontend Developer role focused on leading the architecture and development of AI-enabled web and iOS applications, owning the full frontend layer from design to production. The position involves building scalable React applications and native iOS apps, integrating with backend services, and driving performance, testing, and CI/CD standards. The role combines hands-on development with architectural leadership and mentoring responsibilities. 🗂️ Requirements: 6+ years of professional frontend development experience, Expert-level JavaScript and TypeScript, Expert-level React including hooks and state management, Strong native iOS development experience with Swift and SwiftUI, Experience integrating frontend applications with REST APIs, Knowledge of OAuth2 and JWT authentication mechanisms, Experience with frontend testing frameworks, Experience with frontend build tools, Ability to define frontend architecture and technical standards, Experience working with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Redux, Zustand, Swift, SwiftUI, UIKit, REST, OAuth2, JWT, CSS, Tailwind, StyledComponents, Emotion, Vite, Webpack, Jest, Vitest, Playwright, Cypress, XCTest, Fastlane, Xcode, Claude, CI/CD 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Senior Frontend Developer within Advanced Analytics, you will lead the design and development of user-facing AI-enabled products across web and mobile platforms. You will own the frontend layer of production applications — building sophisticated React-based web interfaces and native iOS mobile experiences that bring AI capabilities directly to end users across the globe. Key responsibilities: Architect and build production-grade React web applications: component design, state management, routing, performance optimization, and accessibility (WCAG compliance). Develop native iOS applications using Swift and SwiftUI (or UIKit where required), delivering high-quality, App Store-ready mobile experiences. Define and enforce frontend architecture standards: folder structure, component libraries, design system integration, and code quality conventions across web and mobile. Integrate frontend applications with REST APIs and event-driven backends, handling authentication flows, error boundaries, loading states, and real-time data patterns. Implement robust frontend testing strategies: unit tests (Jest, Vitest), component tests (React Testing Library), end-to-end tests (Playwright or Cypress), and iOS XCTest suites. Lead frontend performance engineering: bundle optimization, lazy loading, rendering strategies (SSR, CSR, ISR), Core Web Vitals, and iOS app performance profiling. Own the mobile development lifecycle on iOS: from Xcode project configuration and provisioning profiles to TestFlight distribution and App Store submission. Collaborate with UX Designers to translate designs into pixel-perfect, responsive, and accessible interfaces on both web and iOS. Champion AI-augmented development workflows using Claude Code: apply it actively for prototyping, code review, refactoring, and documentation generation. Conduct thorough code reviews, contribute to architectural decision records (ADRs), and mentor junior and mid-level frontend engineers. Work with DevOps to integrate frontend build and deployment into CI/CD pipelines: web app deployments, iOS build automation (Fastlane), and release management. Required Experience & Skills 6+ years of professional frontend development experience, with a strong track record of shipping production applications at scale. Expert-level JavaScript and TypeScript: deep understanding of the language, async patterns, module systems, and type-safe application design. Expert-level React: hooks, context, state management (Redux Toolkit, Zustand, or equivalent), performance patterns, and large-scale component architecture. Strong native iOS development skills using Swift and SwiftUI; experience with UIKit is a plus. Solid experience with iOS-specific concerns: push notifications, background processing, Keychain, deep linking, and App Store review guidelines. Experience consuming and designing frontend integrations with REST APIs, including authentication (OAuth2, JWT), error handling, and data caching strategies. Strong CSS and layout skills: responsive design, CSS-in-JS (Styled Components, Emotion), or utility-first frameworks (Tailwind CSS). Experience with frontend build tooling: Vite, Webpack, or equivalent; understanding of bundling, tree-shaking, and deployment optimization. Hands-on proficiency with Claude Code: using it daily for development, debugging, refactoring, and documentation tasks. Proven ability to define architecture, set standards, and lead technical decisions in a senior individual contributor or tech lead capacity. Strong communication skills: able to collaborate effectively with designers, product managers, and backend engineers across global, distributed teams. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Frontend Vue.js Engineer role for a long-term insurance project focused on integrating multiple applications into a unified ecosystem for claims handling and valuation management. The position involves developing modern web applications, integrating frontend interfaces with REST APIs, and maintaining end-to-end testing in a highly connected environment. The offer includes hybrid work in Warsaw, flexible contract options, and access to modern technologies and international collaboration. 🗂️ Requirements: Commercial experience with JavaScript, Experience with Vue.js, Experience working with REST APIs, Experience creating and maintaining end-to-end tests with Cypress, Ability to work in a complex interconnected environment 📃 Skills: JavaScript, Vue.js, REST, Cypress, AWS, Docker, Kubernetes, OWASP, OCR 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are looking for a Frontend (Vue.js) Engineer to join a long-term project in the insurance domain. The project brings together three interconnected applications into a unified ecosystem supporting claims handling, valuation management, and comparison of repair estimates with counter-offers. The role focuses on developing and maintaining modern web applications in a highly integrated environment, where multiple systems communicate through APIs. You will work on creating intuitive user interfaces, ensuring seamless integration with backend services, and contributing to the quality and reliability of the application through automated testing. Key responsibilities: Develop and maintain frontend applications using JavaScript and Vue.js. Build user interfaces that integrate with backend services via REST APIs. Create and maintain end-to-end tests using Cypress. Collaborate with cross-functional teams to deliver high-quality solutions. Contribute to application quality by following development best practices and supporting continuous improvements. Required Experience & Skills Must have Commercial experience with JavaScript development. Experience with Vue.js. Experience working with REST APIs in a complex, interconnected environment. Experience creating and maintaining end-to-end tests using Cypress. Nice to have Experience with AWS. Experience with Docker and Kubernetes. Basic understanding of application security principles, including OWASP Top 10 and secure coding best practices. Experience with AI-based OCR and document processing. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️ Apply now

🏢 Summary: 6-month Fullstack Software Engineer Internship focused on reviving and improving an existing web application using JavaScript and Java. The role involves contributing to frontend and backend development while following SDLC standards and best practices. Interns collaborate with senior engineers and gain hands-on experience with structured development processes. 🗂️ Requirements: Enrolled in Bachelor or Master degree in Computer Science or related field, Basic knowledge of JavaScript, Basic knowledge of Java and object-oriented programming, Understanding of web application architecture, Familiarity with Git and version control, Basic understanding of SDLC concepts, English proficiency B2+, Willingness to follow defined development processes 📃 Skills: JavaScript, Java, Git, SDLC, Agile, Scrum, OOP, APIs, Frontend, Backend 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are seeking a Fullstack Software Engineer Intern to join our team for an internal project. The main mission of the internship will be to help revive and improve an existing application while following our internal Software Development Life Cycle (SDLC) standards and best practices. The intern will work with both JavaScript and Java, contributing to frontend and backend development. At the same time, this role has an important learning and feedback aspect: by working on a real, living system, you will help us verify whether our development procedures, documentation, and guidelines are clear, usable, and effective in practice. This role is ideal for a young, motivated fullstack developer who wants to learn how software should be built “by the book” — where processes are meant to guide and support engineers, not require expert-level project management skills to understand. Key Responsibilities Contribute to frontend and backend development using JavaScript and Java Help restore, improve, and extend the existing application Follow internal SDLC guidelines, development procedures, and documentation Provide feedback on the clarity and usability of development processes and documentation Collaborate with senior engineers to understand best practices and architectural decisions Assist in debugging, fixing issues, and improving code quality Participate in code reviews and knowledge-sharing sessions Help identify gaps or unclear areas in development procedures and suggest improvements Requirements: Being enrolled in a Bachelor or Master degree in computer science, software engineering, or a related technical field Good English communication skills (B2+), Polish language is a plus Basic knowledge of JavaScript (frontend or backend) Basic knowledge of Java and object-oriented programming Basic understanding of web application architecture (frontend, backend, APIs) Familiarity with Git and version control systems Basic understanding of software development life cycle (SDLC) concepts Willingness to follow defined processes, guidelines, and documentation Analytical mindset and attention to detail Curiosity and willingness to ask questions and learn Independence and drive to grow as a software engineer Any academic, personal, or internship experience with fullstack development is considered an asset Familiarity with Agile/Scrum methodologies is a plus *As an intern, you’re not expected to be an expert. What is really important is your will and ability to expand your skills during the internship and contribute actively to the company. What we offer: 6 month internship Opportunity to work with excellent professionals, in a professional and friendly environment High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) About you: Open-minded and eager to learn Autonomous and not afraid to ask questions Business oriented and looking to bring solutions Capable of detailed and analytical thinking Ready to take responsibilities and have an impact on companies’ projects BE BOLD In your CV, please include the following information: Why would you like to join us? Do you have something to share with us? (portfolio, projects, ideas, …)