Senior Software Development Engineer, AWS Fault Injection Services

Amazon Web Services (AWS); Dublin; On-site; EUR 120,000 - 180,000; Full time

Job summary

Amazon Development Centre Ireland Limited in Dublin is seeking a Senior Software Development Engineer to own the design and delivery of fault actions at the core of FIS. You will build the capabilities that safely disrupt production‑grade AWS services, such as EC2, EKS, Kubernetes workloads, and ElastiCache, driving resilience, scalability, and safety of those systems.

You will set technical direction for your team, advise leadership on architecture, mentor engineers, and ensure strong

Qualifications

• Experience leading architecture and design of new and current systems.
• Experience in professional, non-internship software development.
• Bachelor's degree or equivalent in Computer Science.

Responsibilities

• Own the architecture for one or more FIS fault domains and guide technical strategy.
• Design, build, and release software at large scale for AWS customers worldwide.
• Create new fault actions and target types end to end with authorization and testing.
• Drive durable solutions, not short-term workarounds, where safety matters.
• Raise the bar with alarms, telemetry, guardrails, and incident reviews.
• Collaborate with AWS service teams to design integrations and land cross-team deliveries.
• Mentor engineers and promote engineering best practices across the team.

Skills

Mentor / Tech lead

Architecture & design

Production software development

Object-oriented design

Education

Bachelor's degree in Computer Science or equivalent

Tools

Java

C++

C#

Job description

DescriptionAWS Fault Injection Service (FIS) is a fully managed service for running fault injection and chaos engineering experiments on AWS. Customers use FIS to deliberately and safely stress their applications, uncover hidden weaknesses, validate that their monitoring and alarms work, and prove that their systems recover the way they expect, all before a real incident happens. FIS experiments apply controlled faults to targeted resources, guarded by stop conditions that automatically halt an experiment the moment it moves outside safe limits.

DescriptionAWS Fault Injection Service (FIS) is a fully managed service for running fault injection and chaos engineering experiments on AWS. Customers use FIS to deliberately and safely stress their applications, uncover hidden weaknesses, validate that their monitoring and alarms work, and prove that their systems recover the way they expect, all before a real incident happens. FIS experiments apply controlled faults to targeted resources, guarded by stop conditions that automatically halt an experiment the moment it moves outside safe limits.

We are looking for a Senior Software Development Engineer to own the design and delivery of the fault actions at the core of FIS. You will build the capabilities that safely disrupt production‑grade AWS services, such as Amazon EC2, Amazon EKS and Kubernetes workloads, and Amazon ElastiCache, and you will drive the resilience, scalability, and safety of those systems. You will set the technical direction for your team's software, advise senior leadership on architecture and roadmap, and mentor engineers across the team. Safety is central to this role. A fault that is too broad, or that fires against the wrong resource, can affect real customer workloads, so you will own the authorization, blast-radius controls, and operational rigor that let customers trust FIS to break their systems on purpose. If you enjoy distributed‑systems problems where correctness and customer safety matter as much as scale, this is a rare place to work on them.

Key job responsibilities

• Own the architecture for one or more FIS fault domains, providing a system-wide view and design guidance, and act as a key influencer on your team's technical strategy and goals.
• Design, build, and release software at large scale for AWS customers worldwide, then operate it in production and keep it highly available and durable.
• Build new fault actions and target types end to end: API design, authorization, execution logic, automated testing, and documentation, and safely evolve existing ones.
• Identify high-impact, hard-to-reverse technical decisions early, and drive the team toward durable solutions rather than short-term workarounds, especially where customer safety and blast radius are at stake.
• Raise the operational bar for your team: strong alarms and telemetry, clear runbooks, effective guardrails, and a healthy culture of incident review and continuous improvement.
• Partner with the AWS service teams whose faults FIS supports to design integrations and land cross-team deliveries successfully.
• Advise your management and senior leadership on technical trade-offs, and contribute to short-and long-term planning.
• Actively mentor multiple engineers and champion engineering best practices that others adopt.

A day in the life

A Senior SDE on FIS is an owner of the product, not just of individual components. A typical day combines hands‑on building with work that makes the whole team more effective: producing and reviewing designs for complex fault-domain problems, building and operating fault actions across the service, reasoning carefully about authorization and blast radius so an action can never exceed its intended scope, keeping a close watch on operational health, and unblocking and mentoring the engineers around you. You will join AWS Resilience, working on a service that thousands of AWS customers rely on to make their own systems more reliable.

About The Team

About AWS

Diverse Experiences

AWS values diverse experiences. Even if you do not meet all of the preferred qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn’t followed a traditional path, or includes alternative experiences, don't let it stop you from applying.

Why AWS?

Amazon Web Services (AWS) is the world's most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that's why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses.

Inclusive Team Culture

AWS values curiosity and connection. Our employee-led and company-sponsored affinity groups promote inclusion and empower our people to take pride in what makes us unique. Our inclusion events foster stronger, more collaborative teams. Our continual innovation is fueled by the bold ideas, fresh perspectives, and passionate voices our teams bring to everything we do.

Mentorship & Career Growth

We're continuously raising our performance bar as we strive to become Earth's Best Employer. That's why you'll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional.

Basic Qualifications

• Experience as a mentor, tech lead or leading an engineering team
• Experience leading the architecture and design (architecture, design patterns, reliability and scaling) of new and current systems
• Experience in professional, non-internship software development
• Experience programming with at least one modern language such as Java, C++, or C# including object-oriented design
• Experience in development in the last 3 years

Preferred Qualifications

• Experience with full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations
• Experience building complex software systems that have been successfully delivered to customers
• Experience in debugging, profiling, and implementing software engineering best practices in large-scale systems
• Bachelor's degree or equivalent in Computer Science

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

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Company - Amazon Development Centre Ireland Limited

Job ID: A10576362