Senior Software Engineer (Server Networking Security, Rust)
MongoDB
senior
Location
Cork, Ireland
Work Type
Onsite
Seniority
senior
Posted
July 17, 2026
Total Compensation
€220,000
Yearly Savings (Comfortable)
€68,000
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Job Description
- 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!
- 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- Excellent verbal and written technical communication skills, with a strong desire to collaborate with colleagues
- Understanding of network protocols, TLS, and connection lifecycle management
- Bonus points for experience working hands-on in security-sensitive or networking-adjacent domains
- Strong time management skills and the ability to realistically assess project complexity
- Experience with large backend/compiled codebases and performance-sensitive software, preferably in Rust
- Strong systems fundamentals, including multi-threaded programming and performance profiling. Bonus points for:
- Familiarity with security concepts such as attack surface reduction, input validation, memory safety, and defense-in-depth architectures
- 5+ years of experience building production-quality systems software
- 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
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