Senior (Rust/C++) Backend Engineer

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.

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.