About The Role

We are seeking a Senior Core Infrastructure Engineer to join our DNS Data Plane team. You will design, build, and operate high-performance, highly reliable DNS services that power critical infrastructure at a global scale. This role focuses on performance-sensitive systems, distributed networking, and operational excellence, balancing correctness, latency, and resiliency.

Design and implement DNS data plane components across authoritative and recursive request paths, emphasizing low-latency, high-throughput processing.
Build services and libraries in Go, C, Java, or Python, selecting the appropriate language and approach for each component’s performance and operational requirements.
Optimize CPU, memory, and network I/O through efficient event loops, concurrency models, socket tuning, profiling, and benchmarking.
Own data plane components end to end, including architecture, implementation, testing, safe rollout, observability, capacity planning, and ongoing operational health.
Develop and maintain metrics, logs, traces, SLOs, dashboards, alerts, and practical on-call playbooks.
Improve reliability through fault-tolerant design, graceful degradation, safe deployment practices, and proactive capacity planning.
Collaborate with control plane, security, SRE, and operations teams to deliver end-to-end DNS platform improvements.
Provide technical leadership through architecture reviews, code reviews, and mentorship, raising engineering standards across the team.
Take ownership of production outcomes by proactively identifying and driving performance, reliability, security, and operational improvements.

Required Qualifications

5-8+ years of experience building, managing, or operating large-scale distributed infrastructure in SaaS, cloud, or hybrid-cloud environments.
3+ years of hands-on experience with Linux operating systems.
Strong experience building and operating production-grade distributed systems or network services.
Proficiency in one or more of Go, C, Java, or Python, with the ability and interest to work across languages when needed.
Solid understanding of Linux systems, networking fundamentals, TCP/UDP, sockets, concurrency, and performance profiling.
Demonstrated experience designing highly available systems and delivering safe production rollouts using practices such as canaries, progressive deployments, and feature flags.
Strong ownership and sound technical judgment, with the ability to navigate ambiguity and drive complex problems to durable resolution.

Desired Skills

Deep DNS knowledge, including relevant RFCs, DNS over UDP and TCP, EDNS(0), DNSSEC, caching behavior, zone transfers, rate limiting, and load balancing.
Experience with high-performance systems patterns such as epoll/kqueue, asynchronous I/O, low-lock or lock-free data structures, and packet processing.
Familiarity with DDoS mitigation, abuse prevention, and traffic engineering for L4 and L7 services.
Experience with containers and orchestration platforms such as Kubernetes, including service meshes and network policies where relevant.
Infrastructure-as-code experience, particularly with Terraform.
Strong testing discipline, including unit, integration, fuzz, property-based, performance, and chaos testing.
Experience operating mission-critical, 24/7 services.
Experience using AI-assisted development tools to accelerate coding, testing, debugging, and documentation while maintaining strong engineering judgment, ownership, code quality, and security standards.

What Success Looks Like

You deliver measurable improvements in latency, throughput, reliability, and operational efficiency.
You take end-to-end ownership of the systems you build, from initial design through long-term production health.
You evolve the DNS platform through clean architecture, strong operational readiness, and secure-by-design practices.
You identify risks and opportunities early and drive pragmatic improvements beyond the immediate task.
You raise team standards through mentorship, thoughtful technical leadership, and a culture of operational excellence.

Minimum Job Qualifications

Education and/or Experience

8 years of experience in software development

OR

Bachelor's of Technology (B.Tech) Degree in Computer Science, Computer Engineering, Software Engineering, Electrical/Electronics Engineering, Computer Information Systems, Information Systems, Information Technology, Telecommunications, Mathematics, Physics, or related field AND 4 years of experience in software development

OR

Bachelor's Degree in Computer Science, Computer Engineering, Software Engineering, Electrical/Electronics Engineering, Computer Information Systems, Information Systems, Information Technology, Telecommunications, Mathematics, Physics, or related field AND 4 years of experience in software development

OR

Master's of Technology (M.Tech) Degree in Computer Science, Computer Engineering, Software Engineering, Electrical/Electronics Engineering, Computer Information Systems, Information Systems, Information Technology, Telecommunications, Mathematics, Physics, or related field AND 2 year of experience in software development

OR

Master's Degree in Computer Science, Computer Engineering, Software Engineering, Electrical/Electronics Engineering, Computer Information Systems, Information Systems, Information Technology, Telecommunications, Mathematics, Physics, or related field AND 2 year of experience in software development

OR

Doctorate in Computer Science, Computer Engineering, Software Engineering, Electrical/Electronics Engineering, Computer Information Systems, Information Systems, Information Technology, Telecommunications, Mathematics, Physics, or related field.

Job Skills

Same skills as prior level plus;

Distributed Systems: Demonstrated ability in or knowledge of distributed systems, including designing or managing scalable, secure, and highly available software systems.

Prototyping: Demonstrated experience creating and refining prototypes for system validation and stakeholder feedback.

Computer Science Programming: Demonstrated understanding of computer science principles and ability to implement them in code.

Software Engineering: Demonstrated proficiency in all phases of software engineering and development.

Web Development: Demonstrated ability in or knowledge of web development, including designing, developing, or maintaining modern web applications using current frameworks.

Innovation: Demonstrated ability in or knowledge of innovation, including generating or supporting new ideas, technologies, or processes for organizational growth.

Cross-Functional/Team Collaboration: Demonstrated ability in or knowledge of cross-functional collaboration, including working with stakeholders across teams or geographies to achieve common objectives.

Information Vulnerabilities: Demonstrated ability to assess and mitigate vulnerabilities in IT and physical information assets.

Operating Systems: Demonstrated ability in or knowledge of operating systems, including installing, upgrading, and troubleshooting various operating environments.

API Development: Demonstrated ability to develop, test, and maintain secure APIs for application integration.

API Integration: Demonstrated ability to build and manage robust API integrations for seamless interoperability between systems.

Applied Algorithm Engineering: Demonstrated skill in designing, analyzing, and optimizing algorithms for efficiency and scalability.

Source Control: Demonstrated ability in or knowledge of source control, including managing and documenting code versions and release branches.