Sr Software Engineer - Remote

Reference: 23016Location: Chicago, IL, United StatesIndustry: Crypto/Web3Posted: 2026-05-11Contact: Ethan HudsonEmail: View email address on us.fitly.work: 13176505687Sr. Software EngineerLocation: RemoteAbout the OpportunityWe are seeking a highly skilled Software Engineer to join a specialized team dedicated to the security and resilience of high-performance blockchain infrastructure. In this role, you will focus on adversarial testing and infrastructure robustness, playing a pivotal part in safeguarding a major decentralized network against emerging threats. This is a high-impact opportunity for an engineer who thrives in lean, fast-paced environments at the intersection of core protocol development and systems security.ResponsibilitiesInfrastructure Fortification: Build and maintain critical technical infrastructure for a primary blockchain validator client, ensuring long-term stability and performance.Adversarial Framework Design: Develop sophisticated testing methodologies and frameworks designed to simulate complex attacks, identifying and mitigating vulnerabilities within distributed systems.Scalability & Reliability: Partner with cross-functional engineering teams to architect network solutions that prioritize security, horizontal scalability, and low-latency performance.Full-Cycle Development: Drive the entire software lifecycle—from initial concept and architectural design to production deployment—ensuring seamless transitions across testing environments.Knowledge Leadership: Produce high-quality technical documentation and system designs to maintain rigorous engineering standards and facilitate collaboration across the organization.RequirementsEducational Background: Bachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience).Core Experience: 3+ years of professional experience working with core infrastructure, distributed systems, and advanced testing protocols.Technical Stack: Advanced proficiency in Rust or C++, with a proven track record of writing secure, high-performance code and diagnosing system-level vulnerabilities.Systems Expertise: Hands-on experience with configuration management, automation, and complex technical troubleshooting.Scripting & Monitoring: Strong scripting capabilities focused on improving automation and real-time system monitoring.Collaborative Mindset: A demonstrated ability to work effectively within a distributed team to meet mission-critical deadlines.Preferred QualificationsDeep familiarity with Linux systems, systems automation, and enterprise-grade architecture.Strong understanding of TCP/IP networking and the fundamental principles of decentralized protocols.Experience designing algorithms or software that minimize trust requirements and enhance cryptographic security.Active contributions to the open-source community or prior engagement with major Layer 1/Layer 2 blockchain projects.Compensation & BenefitsBase Salary: $150,000 – $275,000 USD (final compensation determined by experience, skill set, and location).Total Rewards: Competitive incentive compensation and a comprehensive benefits package.#LI-EH1