Java Backend Software Engineer Poland Job title: Java Backend Software Engineer Work Location: remote Experience: 5-6 years Education Qualification: B.A. Roles and Responsibilities: - Design and build systems which add features to our fraud prevention platform - Work with the Product team to define requirements, then iterate based on customer feedback - Write efficient and scalable code, in well-tested systems, running on public cloud infrastructure - End-to-end ownership of what you ship, from architecture discussions through implementation to monitoring in production Required Skills & Desired Skills: - Excellent software engineering skills in Java - An excellent practical understanding of high performance distributed computing - A strong focus on testing, with a customer-first mindset - Experience of multi-threaded, 3-tier architectures, web services and caching - Experience dealing with event-driven pipelines - Willingness to learn and use different technology/programming languages Experience integrating with Machine Learning systems to deliver product features - Ability to lead a project within the team - AWS with Terraform - Redis - Kafka

• Design and build scalable, high-performance frontend applications with strong user experience at the core • Define and own frontend architecture, including component systems, state management, and performance optimization • Translate product and design requirements into intuitive, accessible, and responsive interfaces • Lead frontend code quality through reviews, best practices, and maintainable patterns • Identify and solve UX, performance, and cross-browser challenges in complex applications • Collaborate closely with backend, product, and design to deliver end-to-end features with high quality and speed • Leverage AI tools (e.g., Cursor, Copilot etc.,) to accelerate development and improve quality

• Develop and enhance features aligned with the product roadmap; • Contribute to architectural improvements to ensure scalability and maintainability; • Write high-quality code following best practices and the standards defined by the team; • Participate in code reviews, learning from and contributing to the team; • Support the identification and resolution of issues (bugs, performance improvements); • Collaborate on selecting technical solutions together with the team; • Work closely with product and design to build efficient solutions.

• Design and build backend systems, APIs, and intelligent workflows • Define architecture and data flows for scalable applications • Lead discovery and shape technical approaches for new initiatives • Guide implementation through design reviews, code reviews, and technical direction • Evaluate and apply AI or ML tools where they create real value • Build systems with a focus on performance, reliability, and maintainability • Collaborate with stakeholders to translate business needs into technical solutions