Sr. Software Development Engineer, AWS Networking: MONA

Amazon Web Services (AWS); Seattle (WA); On-site; USD 168,000 - 227,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Parental leave

Job summary

AWS MONA team seeks a Senior Software Development Engineer to lead and shape software strategy for fault-tolerant, scalable systems behind a million-device network. You will design in-house controllers, SDN, and planning software, ensuring robust testing and observability across fleet-scale deployments.

You will mentor engineers, drive architecture reviews, and participate in on-call incidents, delivering high-impact improvements for next-generation data centers and automated remediation

Qualifications

• 7+ years of non-internship professional software development experience.
• 7+ years of programming with at least one software programming language experience.
• 7+ years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience.
• Experience as a mentor, tech lead or leading an engineering team.

Responsibilities

• Partner with the engineering manager to shape the team's software strategy — architecture, roadmap, and long-term vision — for the in-house systems behind a 1M+ device network (everything we run, we build ourselves).
• Design and build the in-house systems that solve our business problems — controllers, software-defined networking (SDN), and planning software — end-to-end, architected to scale with robust tests and metrics.
• Own and evolve our controller for agentic network auto-remediation that detects and resolves network issues automatically.
• Build the planning software that plans every new data center — capacity, racks, and ports — and deploys new network fabric.
• Own out-of-band management-plane services: serial console access to every server and router, plus managed connectivity such as SSH.
• Drive correctness and safety for automation acting on production networks: idempotency, guardrails, and observability that proves work actually happened.
• Lead design reviews, raise the operational-excellence and code-quality bar, and mentor engineers.
• Participate in on-call and help lead high-severity incident response.

Skills

System design

Leadership

Mentorship

Education

Master's degree in computer science or equivalent

Job description

Description

AWS runs one of the largest networks in the world, and MONA (Management, Out-of-Band Networks, and Automation) alone owns over one million physical devices across its full lifecycle. We are in the critical path for every new data center powering the AI revolution.

AWS runs one of the largest networks in the world, and MONA (Management, Out-of-Band Networks, and Automation) alone owns over one million physical devices across its full lifecycle. We are in the critical path for every new data center powering the AI revolution. We build the in-house software that solves our hardest network business problems — controllers, software-defined networking (SDN), and planning systems. For example, we own a controller for agentic network auto-remediation, and the planning software that plans every new data center down to capacity and ports. We are looking for a Senior Software Development Engineer to be a technical leader and force multiplier: you will partner with the engineering manager to shape our software strategy while continuing to design and build these systems at fleet scale. If you want the scope to influence what we build and how we build it — and to keep building it yourself — this is that role.

Key job responsibilities

• Partner with the engineering manager to shape the team's software strategy — architecture, roadmap, and long-term vision — for the in-house systems behind a 1M+ device network (everything we run, we build ourselves).
• Design and build the in-house systems that solve our business problems — controllers, software-defined networking (SDN), and planning software — end-to-end, architected to scale with robust tests and metrics.
• Own and evolve our controller for agentic network auto-remediation that detects and resolves network issues automatically.
• Build the planning software that plans every new data center — capacity, racks, and ports — and deploys new network fabric.
• Own out-of-band management-plane services: serial console access to every server and router, plus managed connectivity such as SSH.
• Drive correctness and safety for automation acting on production networks: idempotency, guardrails, and observability that proves work actually happened.
• Lead design reviews, raise the operational-excellence and code-quality bar, and mentor engineers.
• Participate in on-call and help lead high-severity incident response.

A day in the life

No two days look the same. One morning you are whiteboarding with the manager and a principal engineer on how to evolve the control plane for the next wave of AI data centers; the next you are deep in a greenfield auto-remediation service that resolves faults automatically instead of paging a human at 3am. You will make a teammate's design better, unblock a data-center build with capacity planning, and harden out-of-band console access to a million devices. You will see your work land at a scale almost nowhere else can offer — with real autonomy and teammates sharp enough to make you better.

About The Team

MONA (Management, Out-of-Band Networks, and Automation) is part of AWS Core Networking. We are a highly motivated team of software, systems, and network developers who thrive on solving challenging problems and building large-scale distributed systems. AWS runs one of the largest networks in the world, and MONA alone owns the full lifecycle of over a million physical devices — driving new innovation in one of the largest data center networks on Earth. Everything we run we build in-house: controllers, software-defined networking, planning software, etc.

Basic Qualifications

• 7+ years of non-internship professional software development experience
• 7+ years of programming with at least one software programming language experience
• 7+ years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience
• Experience as a mentor, tech lead or leading an engineering team

Preferred Qualifications

• 5+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
• Master's degree in computer science or equivalent
• 4+ years of highly scalable systems experience

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.

USA, WA, Seattle - 168,100.00 - 227,400.00 USD annually

Company - Amazon Data Services, Inc.