Senior Software Engineer, Server Networking Security (Rust)

Come join the Server Ingress Security team, where we are rearchitecting MongoDB Server’s ingress networking to make MongoDB clusters even more secure. This new team is building the Atlas Network Protection layer, a set of performant, security-critical services that harden MongoDB's pre-authentication attack surface and provides the ability to respond rapidly to emergent threats. We are looking for talented Senior Engineers to join the team and be founding members, where you will play a crucial role in our multi-year roadmap. Our team champions a strong culture of inclusivity, diversity, and collaboration. If you want to work on a collaborative team that applies security and systems engineering fundamentals to protect a popular database at scale, join us! We are looking to speak to candidates who are based in Dublin or Cork for our hybrid working model. Candidate Profile • 5+ years of experience building production-quality systems software • Experience with large backend/compiled codebases and performance-sensitive software, preferably in Rust • Bonus points for experience working hands-on in security-sensitive or networking-adjacent domains • Strong systems fundamentals, including multi-threaded programming and performance profiling. Bonus points for: • Understanding of network protocols, TLS, and connection lifecycle management • Familiarity with security concepts such as attack surface reduction, input validation, memory safety, and defense-in-depth architectures • Excellent verbal and written technical communication skills, with a strong desire to collaborate with colleagues • Strong time management skills and the ability to realistically assess project complexity • B.Sc. in Computer Science or a related field, or equivalent practical experience, with strong competencies in data structures, algorithms, and software design/architecture. Interest in the theory and practice of high-availability, security-critical systems Position Expectations • Design, implement, and operate production-ready security services in Rust, with a focus on security, correctness, performance, and operational excellence • Develop ingress networking and security solutions that ensure the security, availability, and performance of a database service • Diagnose test failures and performance regressions, and implement fixes • Lead development and project management for features and initiatives within the Ingress Security domain • Collaborate across Server, Atlas, Drivers, SRE, and Product Security teams to ensure the Atlas Network Protection layer integrates seamlessly with the broader MongoDB ecosystem • Collaborate with Product Management and Engineering leadership to define the team's roadmap Success Measures • In the first month: Understand the high-level architecture of the Atlas Network Protection layer, set up your development environment, and resolve a few bugs • In three months: Contribute substantially to the Rust development of a current project or milestone, take on code review responsibilities, and participate in reviewing designs for new features • In six months: Independently lead the development of a new feature and help mentor new engineers on the team In twelve months: Drive significant improvements to the security, performance, or operational capabilities of the Ingress Security stack, and contribute to the long-term technical roadmap of the team About MongoDB MongoDB is built for change, empowering our customers and our people to innovate at the speed of the market. We have redefined the data platform for the AI era, enabling builders to create, transform, and disrupt industries with software. MongoDB’s unified data platform, the most widely available, globally distributed data platform on the market, helps organizations modernize legacy workloads, embrace innovation, and unleash AI. Our cloud-native platform, MongoDB Atlas, is the only globally distributed, multi-cloud data platform and is available across…