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Fullstack Engineer

Ref: JO-2602-359116

Netherlands, Amsterdam
Software Development & Engineering, Technology
IT
250 - 999 Employees

Environment: Hybrid
Contract Type: Contract
Starts: 2026-03-10

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Salt is currently hiring a Fullstack Engineer for a client of ours in Amsterdam.

We require a freelancer with kvk/zzp.

Tech Stack

Backend (70%): Java (Spring, Spring Boot); Perl is a plus
Frontend (30%): TypeScript, React

Role Overview

As a Software Engineer II, you design, build, and operate reliable software solutions across the Booking.com tech stack. You translate business requirements into high-quality, well-tested code, take ownership of services end-to-end, and collaborate closely with product, engineering, and operations teams.

Key Responsibilities

Build, test, and maintain scalable backend and frontend applications
Write clean, reusable, and well-tested code; continuously refactor and improve quality
Own services end-to-end, including monitoring, deployment, and production support
Troubleshoot and resolve production issues; contribute to post-incident reviews
Contribute to system and architectural design decisions
Improve reliability, performance, and development processes
Communicate clearly with cross-functional stakeholders and mentor junior engineers