Senior Software Engineer, Core Infrastructure

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.

RESPONSIBILITIES

* 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.

QUALIFICATIONS

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.

Cloud - Cloud Platforms Experience:

2 years of professional experience with cloud platforms (e.g., AWS, Azure,

Google, Oracle Cloud).

Testing and Automation Experience:

3 years of experience working in testing and automation at the system level.

Distributed Systems Experience:

2 year of experience working with delivering and operating large-scale

distributed systems.

Preferred 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 years 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 years 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.

People Leadership / Management Experience:

2 year of experience with cloud platforms (e.g., AWS, Azure, Google, Oracle

Cloud).

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