Back End Developer

Conway & Co • Contract • Rotterdam, NL • 12h ago

Role: Backend Engineer (Freelance - 70-85 euro p/h)

Location: Netherlands (Hybrid - 2 days on-site in Rotterdam, 3 days remote)

The Opportunity

A forward-thinking e-commerce company is seeking an exceptional backend engineer to lead a critical platform modernization initiative. This pivotal role will drive the complete rebuild and replatforming of their existing e-commerce infrastructure using cutting-edge technologies.

As a key contributor to this transformation project, you'll work in a hybrid environment while architecting robust backend solutions that deliver scalable business outcomes. You'll own the technical implementation of complex integrations and data migration strategies.

About Us

We are hiring for a dynamic organization undergoing an exciting digital transformation. Our team is rebuilding our e-commerce platform from the ground up, adopting modern architectural patterns and technologies. We're focused on creating a scalable, robust system that will power our future growth.

Your Impact (Key Responsibilities)

Backend Architecture & Development: Design, develop, and deploy backend services using Java and Spring Boot 3+ within a modular monolith architecture
System Integration & Migration: Implement complex, near-real-time integration patterns and execute data migration strategies from existing platforms
Payment & Subscription Systems: Integrate with third-party services, focusing on payment providers and subscription business models
Data Management & Performance: Manage data persistence using PostgreSQL and utilize Redis for queuing and event handling
Collaborative Engineering: Participate in architectural decisions, ensure code quality, and collaborate within an agile team environment

What You Bring

Profile:

Technical leader who connects backend capabilities to business outcomes
Excellent problem-solver who can navigate complex system integrations
Quality-focused engineer comfortable with modern development practices
Collaborative team player who thrives in hybrid remote-onsite environments

Background:

Minimum 3-5 years of strong proficiency in Java (REQUIRED)
Based in the Netherlands and available to work 2 days per week on-site in Rotterdam (REQUIRED)
Speaking Dutch is a plus
Experience with Spring Boot framework
In-depth experience with PostgreSQL and Redis for queuing/event-driven systems
Proven experience with platform rebuilds or re-platforming projects
Understanding of modular monolith architecture and e-commerce environments
Experience with subscription-based business models and payment provider integrations

Offering:

Competitive freelance rate (€70-85 per hour)
Opportunity to work on a greenfield platform rebuild with modern technologies
Hybrid working arrangement with flexible remote days
6-month contract with 32 hours per week
Chance to build solutions with direct business impact

Qualified candidates will be contacted for a confidential discussion.

Apply