Role Description 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. 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. 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, GCP, or Azure) and containerization tools (Docker, Kubernetes). - Communication: Excellent verbal and written communication skills with the ability to work effectively in a collaborative, remote environment. Preferred Qualifications - Experience with low-level network programming, including asynchronous I/O, direct socket programming, and Linux kernel optimizations (e.g., epoll, zero-copy, or kernel bypass techniques). - Hands-on experience fine-tuning latency-sensitive components in trading systems, such as order-matching engines and risk engines. - Familiarity with blockchain technology, smart contracts, and decentralized systems. - Fundamental understanding of finance and derivatives trading. Ideal Profile Fit - Comfort operating within a compact, agile team navigating complexity, unknowns, and technical ambiguity. - Enthusiasm for rapid prototyping, iterative development, and building the future of financial technology. Work Setup - 100% remote working environment. - High-impact technical ownership within a cutting-edge DeFi/Web3 ecosystem. - Collaborative, performance-driven culture with high standards for engineering excellence. 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