Junior Software Developer (React / Supabase)

Quick Facts

• Role: Junior Software Developer (React / Supabase)

• Contract: Contract of Mandate (Umowa zlecenie)

• Work setup: On-site

• Location: Gliwice

• Pay: 31.40–40.00 PLN gross/hour

Description

Develop and maintain application features using React, TypeScript, and Vite, and build full-stack functionality with Supabase (PostgreSQL, authentication, and storage). You’ll also implement backend logic with Supabase Edge Functions, integrate external services via REST APIs, and use AI-powered tools and automation to improve the development process.

Responsibilities

• Develop and maintain application features using React, TypeScript, and Vite

• Work with Supabase including PostgreSQL, authentication, and storage

• Implement backend logic using Supabase Edge Functions and TypeScript

• Integrate external services through REST APIs

• Use AI-powered tools and automation to improve the development workflow

Requirements

• 1+ year of commercial software development experience

• Good understanding of JavaScript/TypeScript and React fundamentals

• Understanding of SQL and relational databases with PostgreSQL fundamentals

• Familiarity with REST APIs, asynchronous programming, and Git

• Experience with Supabase, Firebase, Node.js, or serverless functions is a plus

• English and Polish communication at B2 level (written and spoken)

Benefits

• Long-term cooperation with opportunities to grow across frontend and backend development

• On-site work at the Gliwice office

• Real projects for international clients using modern technologies

• Access to AI-powered tools and automation to support efficient delivery

• Collaborative team environment focused on knowledge-sharing, development, and ownership