# Senior Software Engineer, Server Networking Security

**Company:** [MongoDB](https://hotfix.jobs/companies/mongodb)
**Location:** Cork, Ireland, Dublin, Ireland
**Role:** Backend Engineering
**Experience:** 5+ years
**Skills:** Rust, Systems Programming, Backend Development, Multithreading, Performance Profiling, Network Protocols, Tls, Input Validation, Memory Safety, Data Structures, Algorithms, Software Architecture, Database Systems, Security Engineering, Code Review
**Posted:** 2026-08-12

> Build and operate security-critical Rust services that protect MongoDB’s ingress networking and database infrastructure. The role requires 5+ years of systems software experience, strong performance and security fundamentals, and the ability to lead features across engineering teams.

## Job Description

## Responsibilities
- Design, implement, and operate production-ready security services in **Rust**, focusing 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 integrate the Atlas Network Protection layer with the broader MongoDB ecosystem.
- Collaborate with Product Management and Engineering leadership to define the team’s roadmap.

## Requirements
- **5+ years** of experience building production-quality systems software.
- Experience with large backend or compiled codebases and performance-sensitive software, preferably in **Rust**.
- Strong systems fundamentals, including multithreaded programming and performance profiling.
- Excellent verbal and written technical communication skills, with a strong desire to collaborate.
- 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.
- Strong competencies in data structures, algorithms, and software design and architecture.
- Interest in the theory and practice of high-availability, security-critical systems.

## Nice to Have
- Hands-on experience in security-sensitive or networking-adjacent domains.
- Understanding of network protocols, **TLS**, and connection lifecycle management.
- Familiarity with attack-surface reduction, input validation, memory safety, and defense-in-depth architectures.

## Success Measures
- **First month:** Understand the high-level architecture of the Atlas Network Protection layer, set up the development environment, and resolve initial bugs.
- **Three months:** Contribute substantially to Rust development, take on code-review responsibilities, and participate in design reviews.
- **Six months:** Independently lead development of a new feature and help mentor new engineers.
- **Twelve months:** Drive significant improvements to the security, performance, or operational capabilities of the Ingress Security stack and contribute to the team’s long-term technical roadmap.

## Benefits
- Supportive and enriching culture.
- Employee affinity groups.
- Fertility assistance.
- Generous parental leave policy.

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