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Senior Java Developer - Freelance Opportunity

NetguruRemote — Poland
Remote Contract €36/hr - €50/hr

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Experience Level

Senior

Qualifications

Technical Skills & ExperienceExtensive experience with Java (Spring / Spring Boot). Strong architectural and problem-solving abilities. Proficient in designing and maintaining REST APIs. Familiarity with SOAP services. Experience in microservices environments. Hands-on experience with Kubernetes (preferably on-premise setups). Background in working with or integrating LIMS systems. Solid understanding of refactoring and modernizing legacy code. Excellent communication skills for direct collaboration with laboratory stakeholders. Proficiency in English at C1 level. Must be based in the European Union.

About the job

Join Netguru, a pioneering force in digital commerce, as we assist renowned brands in modernizing their B2B solutions, marketplaces, and retail ecosystems. Since our inception in 2008, we have empowered businesses through innovative technology, AI-driven personalization, and exceptional engineering and design teams. As a certified B Corporation®, we proudly serve major brands such as IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.

We are currently seeking a Senior Backend Engineer with robust architectural expertise to engage in a long-term project for a European client in the laboratory and biotech sector. This position is a single-developer project, requiring close collaboration with the client’s internal teams and laboratory stakeholders to clarify requirements, outline the project scope, and enhance existing backend processes. Strong communication skills are vital, as you will frequently participate in technical discussions with LIMS and laboratory teams. Your role will encompass hands-on development, legacy code refactoring, and contributing to a scalable, well-structured backend architecture. Please note that candidates must be based in the EU due to client stipulations.

Position: Senior Backend Engineer (Java / Architecture)

Contract: Freelance / B2B – Remote (EU Only)

Rate: 36–50 EUR/hour

Language: English C1


Key Responsibilities

  • Operate independently as the sole backend engineer on the project.
  • Refactor and modernize legacy backend systems.
  • Enhance and expand existing microservices and backend integrations.
  • Maintain and develop REST and SOAP interfaces.
  • Engage with laboratory teams and LIMS stakeholders to define requirements.
  • Guarantee stable operation of backend services in an on-premise Kubernetes environment.
  • Work collaboratively with internal client teams to ensure architectural consistency.

Qualifications

  • Technical Skills & Experience
    • Extensive experience with Java (Spring / Spring Boot).
    • Strong architectural and problem-solving abilities.
    • Proficient in designing and maintaining REST APIs.
    • Familiarity with SOAP services.
    • Experience in microservices environments.
    • Hands-on experience with Kubernetes (preferably on-premise setups).
    • Background in working with or integrating LIMS systems.
    • Solid understanding of refactoring and modernizing legacy code.
    • Excellent communication skills for direct collaboration with laboratory stakeholders.
    • Proficiency in English at C1 level.
    • Must be based in the European Union.

Benefits

In return, we offer:

  • 100% remote, flexible work environment;
  • Access to cutting-edge technology and tools;
  • Opportunities for professional development.

About Netguru

Netguru is a leader in digital commerce, providing innovative solutions for major brands and helping them modernize their B2B offerings. With a commitment to quality and sustainability as a certified B Corporation®, Netguru partners with industry giants to drive their technological advancements.

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