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Shape the future of HR Tech at scaleAt HeadFirst Group, we are redefining the flexible labour market with our platform Striive, connecting over 180,000 independent professionals, suppliers, and clients. From onboarding and matching to contracts, time tracking, and invoicing—everything runs on Striive.The OpportunityAs we prepare for rapid international expansion into the UK, US, and other markets, our platform must scale to support multi-region operations, complex compliance requirements, and high-volume usage. To drive this evolution, we're looking for an experienced Java Engineer to ensure delivery excellence in a fast-paced, Agile environment. Are you an experienced Java developer passionate about building robust systems? Headfirst Group is seeking a Senior Java Developer to join our dynamic team. In this role, you will focus on designing, developing, and maintaining high-performance Java applications, contributing significantly to our core infrastructure and backend solutions.Your Responsibilities:Be part of the development of scalable Java-based backend services.Develop automation and integrations to streamline onboarding and operations worldwide.Collaborate with cross-functional teams to define system specifications.Optimize application performance and ensure system stability.Drive best practices in coding, testing, and deployment.Foster a culture of continuous improvement.