Senior Software Engineer, Server Networking Security (Rust)

MongoDB; Cork; On-site; EUR 120,000 - 150,000; Full time

Benefits offered by this job

Hybrid work model

Disability accommodations available

Job summary

MongoDB is seeking a Senior Engineer to join the Server Ingress Security team in Ireland. You will help rearchitect ingress networking to harden pre-authentication surfaces and contribute to the Atlas Network Protection layer that secures MongoDB clusters.

Based in Dublin or Cork with hybrid work, you will design, implement, and operate production‑ready security services in Rust, lead features, and collaborate with Server, Atlas, Drivers, SRE, and Product Security teams on the roadmap.

Qualifications

• 5+ years of experience building production-quality systems software.
• Experience with large backend codebases and performance-sensitive software, preferably in Rust.
• Strong systems fundamentals, including multi-threaded programming and performance profiling.
• 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.

Responsibilities

• 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.

Skills

Rust

Multithreading

Performance profiling

TLS

Security concepts

Communication

Project planning

Education

B.Sc. in Computer Science or related field

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 provide 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.

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
  • 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.

MongoDB is committed to providing any necessary accommodations for individuals with disabilities within our application and interview process. To request an accommodation due to a disability, please inform your recruiter.

MongoDB is an equal opportunities employer.