Fullstack Engineer – Java/Kotlin & JavaScript

About the role

We are looking for a versatile Fullstack Engineer to join a leading European e‑commerce platform. You will work across both backend and frontend layers, helping to build and maintain high‑performance services and user‑facing features.

Key responsibilities

• Design, develop and adjust Java/Kotlin micro‑services and related APIs.
• Create responsive web components, checkout flows and registration pages using React.
• Support integration efforts, adapting endpoints for external partners.
• Participate in incident response and ensure system reliability.

Required profile

• Strong programming skills in Java (or Kotlin) and experience with micro‑service architectures.
• Hands‑on frontend experience with HTML, CSS, JavaScript and modern frameworks, especially React.
• Good understanding of REST principles, JSON handling and API consumption.
• Ability to switch between backend and frontend tasks quickly.
• English proficiency at least B2 level.

Required skills

• Java
• Kotlin
• JavaScript
• React
• HTML
• CSS
• REST APIs
• JSON
• Microservices
• Gitlab CI
• Docker

What we offer

• Competitive B2B contract: 15‑20 k PLN per month.
• Access to the Worksmile platform for wellbeing and development.
• Collaborative environment that encourages ideas and personal growth.