Senior Fullstack Engineer

HeadHR; Kraków; On-site; PLN 120,000 - 160,000; Full time

Job summary

HeadHR dołącza do globalnego programu Data & Insights, który ma na celu migrację istniejącej platformy raportowania do architektury cloud-native w Google Cloud Platform. Projekt obejmuje tworzenie nowoczesnych aplikacji webowych w chmurze oraz migrację rozwiązań BI.

Pracować będziesz nad backendem w Java/Spring Boot i API REST, frontendem w React/TypeScript, a także nad architekturą mikroserwisów i implementacją CI/CD.

Qualifications

• 6+ years of professional experience delivering large-scale web apps.
• Strong hands-on Java (Java 17+), Spring Boot and RESTful APIs.
• Proven React, JavaScript and TypeScript experience; GCP knowledge.

Responsibilities

• Design, develop, test, and implement modern full-stack web applications in a cloud environment.
• Work independently and collaboratively as part of a cross-country agile delivery team.
• Support the Data & Insights team in migrating existing reporting solutions to cloud-native platforms.
• Develop backend services using Java and Spring Boot, exposing RESTful APIs.
• Build and maintain frontend applications using React, JavaScript and TypeScript.
• Contribute to technical designs within microservice-based architectures.
• Participate in code reviews and follow development standards.
• Mentor junior and mid-level engineers to support team growth.
• Ensure compliance with IT development methodologies and security policies.
• Produce technical documentation aligned with delivery requirements.
• Support CI/CD pipelines and reliable production deployments.

Skills

Java

Spring Boot

RESTful APIs

React

JavaScript

TypeScript

GCP

Microservices

PostgreSQL / BigQuery / AlloyDB

Fluent English / Polish

Tools

Git

Jenkins

Job description

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 modern full-stack web applications in a cloud environment.
• Work independently and collaboratively as part of a cross-country agile delivery team.
• Support the Data & Insights team in migrating existing reporting solutions from vendor BI technologies to cloud-native platforms.
• Develop backend services using Java and Spring Boot, exposing RESTful APIs
• Build and maintain frontend applications using React, JavaScript and TypeScript
• Contribute to technical designs and implementation decisions within microservice-based architectures
• Participate in code reviews and follow established development standards and best practices
• Mentor junior and mid-level engineers, sharing knowledge to support team growth and technology adoption
• Ensure compliance with IT development methodologies, coding standards and corporate information security policies
• Produce technical documentation aligned with delivery and product owner requirements
• Support CI/CD pipelines and contribute to reliable production deployments

Kogo poszukujemy?

Must have

• 6+ years of professional experience delivering large-scale web applications in full-stack engineering roles
• Strong hands-on experience with Java (Java 17+), Spring / Spring Boot, and RESTful APIs
• Strong hands-on experience with React, JavaScript, and TypeScript
• Proven experience working with Google Cloud Platform (GCP)
• Experience with microservice-based architectures
• Experience working with relational databases or data platforms such as PostgreSQL, BigQuery, or AlloyDB
• Good experience with Git and source control management systems (e.g. GitHub)
• Understanding of CI/CD concepts and tools, such as Jenkins
• Good communication skills and a natural willingness to share knowledge and explain technical concepts clearly
• Ability to work independently and as part of a distributed team
• Fluent English and Polish