Principal Fullstack Engineer

Project

You will join a global Data & Insights technology programme focused on modernizing and migrating an existing enterprise reporting and analytics platform from a vendor-based BI solution to a cloud-native architecture on Google Cloud Platform.

You will

• Design, develop, test, and implement scalable, cloud-based full-stack applications using modern technologies
• Work independently as well as collaboratively within a cross-country, agile delivery team
• Contribute to and influence system architecture, high-level and low-level designs, and end-to-end impact analysis
• Support the Data & Insights team in migrating existing reporting solutions from vendor BI tools to cloud-native platforms
• Build and maintain backend services using Java and Spring Boot, exposing RESTful APIs
• Develop modern, responsive frontend applications using React, TypeScript and JavaScript
• Mentor and support other engineers, sharing knowledge and best practices to enable smooth adoption of new technologies
• Follow established IT development methodologies, coding standards, and corporate information security policies
• Produce clear technical documentation aligned with the product owner’s vision and delivery goals
• Contribute to CI/CD pipelines and ensure high-quality, reliable production releases

Must have

• 10+ years of professional experience delivering large-scale, enterprise-grade web applications in full-stack roles
• Strong hands-on experience with Java (Java 17+), Spring / Spring Boot, and RESTful APIs
• Strong hands-on experience with React, JavaScript, TypeScript, and modern frontend development practices
• Proven experience working with Google Cloud Platform (GCP) services
• Solid experience with microservice-based architectures
• Experience working with relational databases and data platforms such as PostgreSQL, BigQuery, or AlloyDB
• Strong experience using Git and source control management systems (e.g. GitHub)
• Hands-on experience in creating high-level and low-level technical designs
• Good understanding of CI/CD pipelines and tools such as Jenkins
• Strong communication skills with a natural desire to mentor and explain complex technical concepts clearly
• Ability to work independently and take ownership of technical outcomes
• Fluent English and Polish