Senior (Rust/C++) Backend Engineer

About the role

Location: Remote - Europe Remote | Full-time Compensation: $120K - $200K We are hiring on behalf of our client, a fast-paced, dynamic, and fully remote team in the decentralized finance (DeFi) and Web3 space who is seeking an experienced Senior Backend Engineer. The employer operates with an ambitious roadmap and a strong commitment to engineering rigor, high-grade security, and rapid execution. As a Senior Backend Engineer, the selected candidate will play a critical role in designing, developing, and maintaining robust, high-throughput, and scalable backend systems. This role extends beyond writing code to architecting resilient, secure systems optimized for low-latency, real-time processing in financial services. The ideal candidate brings over eight years of engineering experience, a deep interest in Web3 and DeFi, and a strong dedication to high code quality and state-of-the-art software testing methodologies. Key Responsibilities Backend Development Design, develop, and maintain core backend systems powering high-throughput trading, exchange, and network infrastructure using clean, efficient, and maintainable code. Index on-chain data into event queues and persistence layers to serve WebSockets and scalable APIs consumed by user interfaces and risk dashboards. System Architecture Define the high-level backend structure, data flow, and interactions between components, focusing on event-driven architecture and messaging patterns common in financial systems. Reliability, Performance & Availability Ensure architectural designs meet strict performance, high availability, and reliability standards. Implement failover mechanisms, redundancy strategies, and disaster recovery plans to minimize potential downtime. Security Implement and maintain robust security measures to protect backend infrastructure and APIs against DDoS attacks, data breaches, injection vulnerabilities, and other threat vectors. Data Storage Strategy Define data storage strategies and select appropriate databases and models tailored for financial applications. Evaluate trade-offs across relational databases, key-value stores, and messaging queues. Testing Strategy Develop and execute a comprehensive testing strategy covering unit, integration, security, load, and performance testing. Collaborate with the broader engineering team to establish test reporting and maintain standardized testing processes. Technological Evaluation & Documentation Stay informed on emerging backend technologies, evaluating new tools, frameworks, and methodologies to elevate system performance and scalability. Document architectural designs clearly for both technical team members and non-technical stakeholders. Code Review & Team Collaboration Participate in code reviews, mentor engineering team members, and enforce coding standards and best practices. Collaborate closely with cross-functional teams, including on-chain engineers, frontend developers, product managers, quantitative specialists, and executive leadership. Requirements Minimum Qualifications Experience: 8+ years of backend engineering experience within the financial services industry. Core Languages: 6+ years of hands-on experience using Rust or C++ to build highly scalable web services. Concurrency: Mastery of asynchronous programming and advanced concurrency patterns, with an emphasis on thread safety and lock-free data structures. Databases: 6+ years of experience designing and maintaining relational databases (e.g., PostgreSQL). Messaging & Caching: 4+ years of experience with low-latency persistence and messaging technologies (e.g., Kafka, Redis, RabbitMQ). High Availability: Proven track record of building and maintaining high-availability systems managing significant transaction volumes. Security: Strong proficiency in securing and hardening backend systems and APIs against evolving security threats. Testing & Cloud: Strong knowledge of software testing methodologies alongside experience with cloud platforms (AWS

Skills