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July 2, 2026

Full Stack (Java & Angular, Typescript) Engineer

Senior • Hybrid

Warsaw, Poland

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 focused on knowledge sharing, collaboration, and continuous improvement.

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Warsaw, Poland

🏢 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 ➡️

Technology

Webellian Sp.z o o

Internship - Full Stack Software Engineer (Node.js & React)

Intern

On-site

Warsaw, Poland

🏢 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, …)

Technology

Webellian Sp.z o o

Senior Quality Assurance Engineer

Senior

Hybrid

Warsaw, Poland

🏢 Summary: The offer is for an experienced Quality Assurance Engineer to work on an insurance industry project, ensuring software quality through manual and automated testing. The role involves creating test strategies, executing tests, reporting defects, and supporting production deployments within an Agile environment. The position also includes contributing to testing standards and security practices such as OWASP and ISO/IEC 27034. 🗂️ Requirements: Minimum 5 years of experience as a Quality Assurance Engineer, Proven experience in QA methodology, Experience in preparing test strategies and test plans, Experience in manual and automated testing, Hands-on experience with Postman and Cypress, Hands-on experience with Jira and Confluence, Experience with Agile/Scrum methodologies, Ability to document and troubleshoot errors, BSc/BA in Computer Science, Engineering or related field, Fluency in English 📃 Skills: Postman, Cypress, Jira, Confluence, OWASP, ISO27034, Agile, Scrum, ManualTesting, AutomatedTesting 🏢 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 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 an experienced Quality Assurance Engineer with a minimum of five years of professional experience to join our team for a project with a key client in the insurance industry. This position is automation-focused, with automated testing forming the core of daily responsibilities, complemented by limited manual testing activities to support overall product quality. The successful candidate will play a critical role in designing, developing, and maintaining automated test solutions while ensuring high quality standards throughout the software development lifecycle. You will collaborate closely with development teams, product stakeholders, and clients to ensure that delivered solutions meet defined functional, technical, and quality requirements. Depending on your experience, you will also have the opportunity to introduce new testing tools and actively contribute to improving testing strategies and quality processes, including but not limited to OWASP and ISO/IEC 27034. Key responsibilities Analyze system specifications and requirements Prepare test strategies and automation-focused test plans Design, develop, and maintain automated tests Execute automated tests and analyze results Perform manual testing when required to support releases Identify, document, and track defects Collaborate with development teams to resolve issues Communicate directly with clients, gather requirements, and provide quality-related feedback Mentor team members and support knowledge sharing within the QA team Support troubleshooting and root cause analysis Conduct post-release testing and verification Ensure quality throughout the software development lifecycle Support production deployments and post-deployment validation Contribute to continuous improvement of QA processes and automation practices Competencies Proven experience as a Quality Assurance Engineer with strong automation testing expertise Solid understanding of QA methodologies and software testing best practices Hands-on experience with Playwright (experience with additional languages or frameworks is considered an asset) Experience with API testing tools such as Postman Practical experience with Jira and Confluence Strong analytical and problem-solving skills High attention to detail and accuracy Critical thinking and proactive approach to quality Independence, ownership mindset, and willingness to continuously learn Experience mentoring team members and supporting knowledge sharing within the team Experience in direct client communication, gathering requirements, and providing quality-related feedback BSc/BA in Computer Science, Engineering, or a related field Software development experience will be considered an additional asset Excellent verbal communication skills Experience working in Agile/Scrum environments Fluency in English 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.