(Senior) Java Developer - Freelance
Role summary by JobGrid
(Senior) Java Developer - Freelance at Netguru: Remote, Poland; Contract; IT; Back End Engineer. This listing is part of JobGrid's Remote software engineer jobs from public company career pages. JobGrid adds normalized role facts, source context, and a path to the employer application page so candidates can compare the listing before applying.
- Location and workplace: Remote, Poland
- Role classification: IT, Back End Engineer, Contract
- Source freshness: checked by JobGrid on 2026-05-30.
- Application path: candidates continue to the employer application page with non-personal referral tags.
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.
Position: Senior Backend Engineer
Contract: B2B – Remote (EU Only)
Rate: up to 30 EUR/hour + 20 paid vacation days
Language: English C1
Responsibilities
- Design and build scalable backend systems for processing large volumes of spare parts data
- Develop and maintain robust, high-performance APIs for data integration and access
- Build, optimize, and maintain ETL pipelines for data ingestion and transformation
- Process and manage large datasets in distributed environments
- Optimize system performance, latency, and throughput across backend services
- Improve database performance through indexing, schema design, and query optimization
- Collaborate with product managers, designers, and engineering teams to deliver scalable solutions
- Work closely with stakeholders to define and implement data-driven functionalities
- Ensure high standards of security, reliability, scalability, and maintainability
- Mentor and support other engineers as part of a senior-level engineering role
- Stay up to date with modern backend technologies, architecture patterns, and engineering best practices