(Senior) Java Developer - Freelance

Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.

We are looking for a Senior Backend Engineer with strong architectural skills to join a long-term project for a European client in the laboratory and biotech domain. This is a  single-developer project , where you will work closely with the client's internal teams and laboratory stakeholders to clarify requirements, define scope, and improve existing backend processes. Strong communication skills are essential, as you will regularly attend technical discussions with LIMS and laboratory teams. The role involves hands-on development, refactoring legacy code, and contributing to a scalable and well-structured backend architecture. You must be based in the EU due to client requirements.

Position : Senior Backend Engineer (Java / Architecture)

Contract : Freelance / B2B – Remote (EU Only)

Rate : 36–50 EUR / hour

Language : English C1

Responsibilities

• Work independently as the sole backend engineer on the project
• Refactor and modernize legacy backend systems
• Improve and extend existing microservices and backend integrations
• Maintain and develop REST and SOAP interfaces
• Communicate with laboratory teams and LIMS stakeholders to define requirements
• Ensure stable operation of backend services in an on-premise Kubernetes environment
• Collaborate with internal client teams to maintain architectural consistency

Requirements

Benefits

In return, we offer :

What will happen next?

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