Anduril Site Reliability Engineer interview questions & guide 2026

The following questions reflect the core competencies required for the Site Reliability Engineer role. While your specific interview loop may vary based on the team—such as Fleet Infrastructure or Intelligence Systems—expect a rigorous evaluation of your technical depth and your ability to solve complex, distributed problems.

Technical Infrastructure and Systems

These questions assess your foundational knowledge of Linux, networking, and cloud-native technologies.

• How would you debug a high-latency issue in a distributed system where the root cause is not immediately obvious?
• Explain the trade-offs between different consensus algorithms in the context of a distributed data store.

Preparation should focus on your ability to apply engineering principles to non-standard environments. Anduril values candidates who can demonstrate deep technical mastery alongside a pragmatic, mission-oriented mindset.

Technical Depth – You must demonstrate a deep understanding of the Linux kernel, networking protocols, and container orchestration. Interviewers look for candidates who can explain the "why" behind their architectural choices, not just the "how."

System Architecture – You will be evaluated on your ability to design robust systems that can survive failures. Show that you consider edge cases, such as hardware degradation, network partitioning, and resource constraints, as core design requirements.

Operational Pragmatism – Anduril values engineers who build for the real world. You should be able to articulate how you prioritize tasks, manage technical debt, and communicate risks to stakeholders who may not have a deep engineering background.

The interview process at Anduril is designed to be rigorous, reflecting the high-stakes nature of our mission. It typically begins with a technical screening to gauge your baseline competency in systems engineering and coding. Candidates who progress move into a series of technical rounds that may include system design sessions, deep dives into your previous projects, and peer-review style discussions.

The process is highly collaborative, and you should expect to interact with members of both software and infrastructure teams. We prioritize candidates who can demonstrate clear, logical thinking under pressure and who align with our culture of speed, ownership, and technical excellence. The pace is generally fast, and the interviews are designed to test your ability to handle ambiguous, complex problems.

The timeline above illustrates the standard progression from initial engagement to the final decision. Candidates should treat each stage as an opportunity to demonstrate both technical depth and a proactive, problem-solving mindset. Manage your energy by preparing for intense, long-form technical discussions rather than rote memorization.

Distributed Systems & Networking

Reliability at scale requires a deep grasp of how systems interact over networks. You will be tested on your ability to reason about consistency, availability, and partition tolerance.

Be ready to go over:

• CAP Theorem applications in real-world scenarios.
• Networking stacks, including TCP/IP, load balancing, and traffic routing.
• Service discovery and orchestration in dynamic environments.
• Advanced concepts: Distributed tracing, message queuing patterns, and handling clock skew in distributed systems.

Example scenarios:

• "Design a system that can synchronize state across 1,000 edge nodes."
• "How do you detect and mitigate a network partition in a cluster of microservices?"

Infrastructure as Code & Automation

We expect our Site Reliability Engineers to treat infrastructure as a software product. You will be evaluated on your ability to write clean, maintainable code to manage complex environments.

Be ready to go over:

• IaC frameworks such as Terraform or Ansible.
• CI/CD pipeline design for high-reliability environments.
• Configuration management at scale.
• Advanced concepts: Immutable infrastructure patterns and automated recovery loops (self-healing systems).

Example scenarios:

• "How do you manage configuration drift across a fleet of devices?"
• "Describe your process for auditing and securing a production infrastructure."

As a Site Reliability Engineer, your primary objective is to build the "paved road" for other engineering teams at Anduril. You will be responsible for defining and implementing the standards for how our services are deployed, monitored, and scaled. This involves significant collaboration with software developers to ensure that the code they write is operational-ready from day one.

You will spend a significant portion of your time identifying bottlenecks in our current infrastructure and architecting solutions to eliminate them. Whether it is improving the deployment velocity of our intelligence platforms or hardening the connectivity of our fleet infrastructure, you will be a key driver of technical strategy. You will also participate in on-call rotations, where you will directly influence our incident response and post-mortem processes to ensure we learn from every disruption.

A strong candidate for this role possesses a blend of high-level architectural thinking and low-level system debugging skills. You should be comfortable working in a fast-paced, mission-driven environment where the definition of "done" is tied to real-world performance.

• Must-have skills:

• Proficiency in at least one systems programming language (e.g., Go, C++, Rust).

• Deep experience with Linux systems administration and shell scripting.

• Hands-on experience with containerization (Docker, Kubernetes) and orchestration.

• Proven track record of managing large-scale infrastructure in cloud or on-prem environments.

• Nice-to-have skills:

• Experience with edge computing or embedded systems.

• Familiarity with security-hardened infrastructure standards.

• Experience building and maintaining observability stacks (Prometheus, Grafana, ELK).

Q: What differentiates successful candidates at Anduril? Successful candidates demonstrate high agency and a "mission-first" mentality. They don't just identify problems; they build and implement solutions, and they are able to communicate complex technical trade-offs clearly to the rest of the team.

Q: How much preparation time do you recommend? We recommend at least 2–4 weeks of focused preparation. You should brush up on distributed systems theory and be ready to discuss the architectural decisions you made in your past projects in great detail.

Q: Is there a specific coding language required for the technical rounds? While we value polyglots, you should be prepared to code in a language you are most comfortable with, provided it is suitable for systems programming. We prioritize the logic and efficiency of your solution over the specific syntax.

• Own your past work: Be prepared to dive deep into any project you list on your resume. You should be able to explain the specific architectural challenges you faced and how you overcame them.
• Prioritize clarity over jargon: When explaining complex systems, focus on the "why" before the "how." Clarity in communication is just as important as technical accuracy.
• Think in systems: Even when answering a simple question, consider the implications for scalability, security, and maintenance.
• Stay curious about the mission: Understanding what Anduril builds will help you tailor your answers to the specific constraints and goals of our products.

The Site Reliability Engineer role at Anduril is a critical function that enables our most ambitious technological goals. By focusing on distributed systems design, automation, and operational resilience, you will play a direct role in shaping the future of defense technology. Preparation is key; by deeply reviewing your past architecture work and sharpening your problem-solving skills, you will be well-positioned for success.

You can explore additional interview insights, practice questions, and preparation resources on Dataford to further refine your readiness. Remember that every interview is a chance to showcase your unique expertise and your alignment with the mission.

The compensation data provided reflects the market range for Site Reliability Engineer roles across various Anduril locations. Use this as a baseline to understand the seniority and scope of the positions, keeping in mind that total compensation packages may include additional components like equity or performance bonuses.