• Extend LI.FI’s API stack to include Hyperliquid ecosystem projects and feature sets • Design, build, and maintain backend services using Node.js and TypeScript • Work with MongoDB, Redis, and MySQL to support high-throughput, low-latency trading workflows • Collaborate closely with the Expansion PM and other backend engineers to improve integrations, routing, and user flows, and help evaluate new opportunities for feature expansion • Ensure robust, high-quality backend code with a strong focus on scalability, performance, and reliability for same-chain and cross-chain trading • Participate in code reviews, system design discussions, and technical documentation

• Lead the technical direction and implementation of the central off-chain coordination system for our next-generation architecture. • Design, implement, and maintain the highly available, low-latency APIs required for seamless application interaction, quote management, and system-wide status retrieval using Node.js/TypeScript and the NestJS framework. • Develop advanced and rigorous validation mechanisms to ensure data integrity and prevent fraudulent activity within the system. • Build and optimize the infrastructure for immediate, real-time broadcasting of critical, validated data to all participating external liquidity providers and execution partners. • Integrate with specialized data indexing services to reliably monitor and track the multi-phase lifecycle of core system objects across distributed environments. • Implement advanced logic for data aggregation, caching, and mechanisms for partner reputation and selection to ensure the best possible user experience. • Proactively identify and resolve potential security vulnerabilities in the off-chain coordination flow to maintain the trustless nature of the overall system. • Work closely with the core Smart Contract and Product teams, and ensure comprehensive documentation for the backend architecture and APIs.

Remote in EU | B2B Contract Role Overview We are looking for a strong Java Engineer (mid/senior level) who will work across several internal services at the same time, shaping backend architecture, contributing to product decisions, and supporting multiple engineering teams. This is not a single-project assignment - you will touch 3–4 microservices in parallel, work closely with Product Owners, and bring a strong technical point of view. The ideal person is hands-on, analytical, comfortable with cloud-native environments, and open to working with AI-supported solutions as part of modern engineering. We are particularly interested in engineers who are close to senior level and demonstrate strong ownership and problem-solving skills. Key Responsibilities: - Build and maintain backend services and APIs in Java - Work across multiple microservices (3–4) simultaneously - Collaborate closely with Product Owners on technical direction - Contribute to cloud-native architecture on AWS (90%) + Azure (10%) - Deploy and operate services using Kubernetes and Docker (must-have) - Contribute to Python-based services when needed - Work with analytics and data insights to support decisions - Follow SDLC best practices: testing, code reviews, documentation - Collaborate with DevOps on CI/CD, deployments, scaling Requirements: - Extensive experience in Java engineering - Strong experience with microservices / distributed systems - Solid knowledge of AWS services - Strong Kubernetes + Docker skills (must-have) - Ability to contribute to Python codebases - Good understanding of CI/CD, REST APIs, SQL - Comfortable working with AI-driven tools and modern development workflows - Proactive, ownership-driven, adaptable to multi-project environments What's on Offer: - Work on cutting-edge AI systems used globally - Dynamic, multi-disciplinary teams engaged in digital transformation - Remote-first work model - Long-term B2B contract - 20+ days paid time off - Apple gear - Training & development budget Diversity and Inclusion Commitment We are dedicated to creating and sustaining an inclusive, respectful workplace for all — regardless of gender, ethnicity, or background. We actively encourage applicants from all identities and experience levels to apply and bring your authentic self to our fast-paced, supportive team.

• Maintain and support existing Magento-based eCommerce websites • Troubleshoot, investigate, and resolve issues in production and staging environments • Analyze and fix bugs in PHP code and database queries • Implement minor enhancements and improvements to existing functionality • Monitor application performance and proactively identify optimization opportunities • Support integrations with third-party APIs, payment gateways, and shipping services • Ensure system stability, reliability, and high availability • Collaborate with cross-functional teams to address issues and deliver continuous improvements