Senior Software Engineer - Core Infrastructure

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

Key Responsibilities

• Design and implement DNS data plane components across authoritative and recursive request paths, with a focus on low-latency, high-throughput processing.
• Build services and libraries in Go, C, Java, and/or Python, selecting the right language and approach for each component’s performance and operational needs.
• Optimize CPU, memory, and network I/O performance through efficient event loops, concurrency models, socket tuning, and profiling.
• Own data plane components end to end: architecture, implementation, testing, safe rollout, observability, capacity planning, and ongoing operational health.
• Develop and maintain metrics, logs, tracing, SLOs, dashboards, 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.
• Participate in code reviews, architecture reviews, and technical leadership; mentor teammates and raise engineering standards.
• Take ownership of production outcomes by proactively identifying and driving performance, reliability, security, and operational improvements.

Required Qualifications

• 5+ years of operations engineering experience in SaaS, cloud, or hybrid-cloud environments.
• 5+ years managing and operating large-scale, highly distributed service infrastructure.
• 3+ years of hands-on Linux experience.
• Strong experience building and operating production-grade distributed systems and/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—including TCP/UDP and sockets—concurrency, and performance profiling.
• Demonstrated experience designing highly available systems and delivering safe production rollouts using practices such as canaries and feature flags.
• Strong ownership mindset, with the ability to make sound technical decisions, navigate ambiguity, and drive complex problems through to durable resolution.

Desired Skills / Nice to Have

• Deep DNS knowledge, including relevant RFCs, UDP/TCP DNS, 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 protection, and traffic engineering for L4/L7 services.
• Experience with containers and orchestration platforms such as Kubernetes, including service meshes and network policies where relevant.
• Infrastructure-as-code experience, especially Terraform.
• Strong testing discipline, including unit and integration testing, fuzzing, property-based testing, and chaos testing.
• Experience operating mission-critical, 24/7 services.
• Experience using AI-assisted development tools thoughtfully to accelerate coding, testing, debugging, and documentation while applying 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, following through from initial design to long-term production health.
• You evolve the DNS platform with clean architecture, strong operational readiness, and secure-by-design practices.
• You identify risks and opportunities early, driving pragmatic improvements beyond the immediate task.
• You raise team standards through mentorship, thoughtful technical leadership, and a culture of operational excellence.

Disclaimer:

Certain U.S. based or U.S. customer or client-facing roles may be required to comply with applicable requirements, such as immunization/occupational health mandates, and/or drug testing requirements.

Range and benefit information provided in this posting are specific to the stated locations only

US: Hiring Range in USD from: $79,200 to $209,500 per annum. May be eligible for bonus and equity.


Oracle maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, market conditions and locations, as well as reflect Oracle's differing products, industries and lines of business.
Candidates are typically placed into the range based on the preceding factors as well as internal peer equity.

Oracle US offers a comprehensive benefits package which includes the following:
1. Medical, dental, and vision insurance, including expert medical opinion
2. Short term disability and long term disability
3. Life insurance and AD&D
4. Supplemental life insurance (Employee/Spouse/Child)
5. Health care and dependent care Flexible Spending Accounts
6. Pre-tax commuter and parking benefits
7. 401(k) Savings and Investment Plan with company match
8. Paid time off: Flexible Vacation is provided to all eligible employees assigned to a salaried (non-overtime eligible) position. Accrued Vacation is provided to all other employees eligible for vacation benefits. For employees working at least 35 hours per week, the vacation accrual rate is 13 days annually for the first three years of employment and 18 days annually for subsequent years of employment. Vacation accrual is prorated for employees working between 20 and 34 hours per week. Employees working fewer than 20 hours per week are not eligible for vacation.
9. 11 paid holidays
10. Paid sick leave: 72 hours of paid sick leave upon date of hire. Refreshes each calendar year. Unused balance will carry over each year up to a maximum cap of 112 hours.
11. Paid parental leave
12. Adoption assistance
13. Employee Stock Purchase Plan
14. Financial planning and group legal
15. Voluntary benefits including auto, homeowner and pet insurance

The role will generally accept applications for at least three calendar days from the posting date or as long as the job remains posted.

Career Level - IC3

• Design and implement DNS data plane components for low-latency, high-throughput request processing.
• Build and maintain core services/libraries in Go, C, Java, and/or Python.
• Drive performance optimization across CPU, memory, and network I/O (concurrency, socket tuning, event loops).
• Own observability and operational readiness: metrics/logs/tracing, SLOs, runbooks, and on-call practices.
• Improve reliability via fault-tolerant design, graceful degradation, and capacity planning.
• Partner cross-functionally (control plane, security, SRE/ops) to deliver end-to-end DNS platform improvements.
• Provide technical leadership through design reviews, code reviews, and mentoring.