Internship - Fullstack Software Engineer (Java & JavaScript)

🏢 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: 6-month DevOps Engineer Internship supporting CI/CD, cloud environments, and infrastructure automation for an international client. The role focuses on maintaining deployment pipelines, monitoring systems, and assisting with cloud-based infrastructure tasks. Ideal for students seeking hands-on experience in modern DevOps and cloud practices. 🗂️ Requirements: Enrolled in Bachelor or Master degree in Computer Science, Software Engineering, IT, or related field, English proficiency minimum B2, Basic knowledge of Linux or operating systems, Basic understanding of networking fundamentals, Basic understanding of CI/CD concepts, Familiarity with Git and version control systems 📃 Skills: Linux, Networking, HTTP, DNS, Git, CI/CD, Azure, AWS, GCP, Docker, Bash, PowerShell, Python, Agile, Scrum 🏢 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 DevOps Engineer Intern to join our team for a project with a key international client. The intern will support the DevOps and engineering teams in maintaining, monitoring, and improving development and deployment processes. You will work alongside experienced DevOps engineers and software developers, gaining hands-on experience with cloud platforms, CI/CD pipelines, and infrastructure automation. This role is ideal for someone interested in how software is built, deployed, and operated in modern cloud environments. Requirements Being enrolled in a Bachelor or Master degree in computer science, software engineering, IT, or a related technical field Good English communication skills (B2+), Polish language is a plus Basic understanding of Linux / operating systems Basic knowledge of networking fundamentals (HTTP, DNS, ports, protocols) Basic understanding of CI/CD concepts Familiarity with Git and version control systems Basic knowledge of cloud platforms (Azure, AWS, or GCP) is a plus Basic exposure to Docker or container concepts is a plus Interest in automation, scripting, and infrastructure (Bash, PowerShell, Python – nice to have) Analytical mindset and problem-solving skills Attention to detail and responsibility Independence and strong willingness to learn Any academic, personal, or internship experience related to DevOps, cloud, or system administration 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. Key responsibilities Support the DevOps team in maintaining CI/CD pipelines Assist in monitoring applications, systems, and cloud environments Help with basic infrastructure configuration and deployment tasks Support automation of repetitive tasks and processes Assist in troubleshooting deployment, build, and runtime issues Help maintain documentation related to infrastructure and processes Collaborate with developers to support development and release workflows Participate in improving system reliability, performance, and security 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: 6-month internship for a Quality Assurance Engineer supporting an insurance industry project, focused on ensuring software quality through manual testing and defect reporting. The role involves creating and executing test cases, identifying bugs, and collaborating closely with developers in an Agile environment. It is suited for students in technical fields who want to grow their QA skills using modern tools and methodologies. 🗂️ Requirements: Enrollment in Bachelor’s or Master’s degree in Computer Science or related field, Solid understanding of software testing concepts and methodologies, Basic knowledge of Postman, Basic knowledge of Cypress, Basic knowledge of Jira, Basic knowledge of Confluence, Good English communication skills (B2+), Understanding of bug tracking systems, Familiarity with Agile/Scrum methodologies 📃 Skills: Postman, Cypress, Jira, Confluence, Agile, Scrum, Testing, QA, ManualTesting, BugTracking 🏢 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 an intern Quality Assurance Engineer to join our team for a project with a vital insurance industry client. The intern will help the team to ensure that the final product meets the client's specified quality standards and requirements. You will help them to identify and report any bugs or glitches in a timely and effective manner. This role requires an individual with a strong attention to detail and exceptional communication abilities. Requirements Being enrolled in a Bachelor or Master degree in computer science or a related technical field Good english communication skills (B2+), Polish language is a plus. Solid understanding of software testing concepts and methodologies Basic knowledge of Tools: Postman, Cypress (experience with additional languages is considered an asset) Basic knowledge of Jira/Confluence Analytical skills Attention to detail and accuracy Сritical thinking Independence and drive to grow and learn Some experience in software development will be considered as an additional asset Familiarity with bug tracking systems and test management tools is a plus Experience with Agile/Scrum methodologies is a plus Excellent verbal communication skills are a must *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. Key responsibilities Collaborate with the development team to understand product requirements and specifications Create and execute test cases to verify the functionality and performance of our software products Conduct manual testing to identify and document defects, bugs, and inconsistencies Assist in maintaining and updating test documentation, including test plans and test reports Collaborate with developers to reproduce and troubleshoot reported issues Participate in regression testing to ensure the stability of our software releases Provide feedback and suggestions to improve the overall quality of our products 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: 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: 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 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 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 our 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 in working collaboratively in a team environment. Join our team, work with us on challenging projects! Key responsibilities Analyzing business requirements Writing clean, functional code, including unit tests Writing technical documentation Propose technical improvements to the application Grow and nurture your 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, 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 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 🤫) 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 ➡️ 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: Senior Fullstack Engineer role focused on building and enhancing client solutions using Node.js and React technologies, including a back-office platform for a global insurance leader. The position involves fullstack development, technical analysis, clean code delivery, mentoring junior developers, and collaboration with international teams in a hybrid Warsaw-based environment. 🗂️ Requirements: 5+ 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, Experience writing unit tests and technical documentation, Understanding of software architecture and development principles, Familiarity with REST API and GraphQL, Knowledge of SQL and NoSQL databases, 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 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 opportunity We are seeking an experienced Senior 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 our 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 5 years of experience in Fullstack development, a deep understanding of Node.js, React and related frameworks , and experience in working collaboratively in a team environment. Join our team, work with us on challenging projects! Key responsibilities Analyzing business requirements Writing clean, functional code, including unit tests Writing technical documentation Propose technical improvements to the application Grow and nurture your 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, 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 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 🤫) 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 ➡️ 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: 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 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: 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: Long-term Backend Java Engineer role focused on developing and integrating backend services for insurance applications supporting claims handling and valuation management. The position involves Java and PostgreSQL development, REST API integrations, application modernization, and secure coding practices in a highly integrated environment. Hybrid work in Warsaw with opportunities to work on modern technologies in an international team. 🗂️ Requirements: Commercial experience with Java 8 backend development, Experience with PostgreSQL, Experience integrating systems via REST APIs, Knowledge of Apigee, Understanding of OWASP Top 10, Knowledge of secure coding practices 📃 Skills: Java, PostgreSQL, REST, Apigee, OWASP, AWS, Docker, Kubernetes, 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 an experienced Backend (Java) 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 backend development in a highly integrated environment, where multiple systems communicate through APIs. You will contribute to the development and maintenance of backend services while ensuring seamless integration between applications. Key responsibilities: Develop and maintain backend solutions using Java and PostgreSQL. Implement and maintain integrations between multiple systems using APIs. Collaborate with cross-functional teams to deliver reliable and scalable solutions. Support the modernization of existing applications, including Java version upgrades. Apply secure coding practices throughout the software development lifecycle. Required Experience & Skills Must have Commercial experience with Java 8 backend development (experience in upgrading Java versions is a plus). Experience working with PostgreSQL. Experience integrating systems via REST APIs in a complex, interconnected environment. Knowledge of Apigee. Understanding of application security principles, including OWASP Top 10 and secure coding best practices. Nice to have Experience upgrading applications to newer Java versions. Experience with AWS. Experience with Docker and Kubernetes. 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 ➡️