Software Development Engineer (open-source), Runtimes

Amazon is hiring a Software Development Engineer (open-source), Runtimes in Dublin, Ireland. Level rates it ; you can apply on Amazon.

Level's read on this job

Level rates this software engineer role Little AI ●○○○: aI is not part of the work.
The posting mentions Python, Node.js and Java among its tools and skills.
Level classes it as a senior role.
Amazon has 21,000+ other open roles on Level.
Posted within the past two weeks.

AI in this role

Develop and maintain AWS Lambda Runtimes across multiple programming languages to power serverless computing at scale.

pythonnodejsjavagorust

software-engineeringserverlessdistributed-systemssecurity

AWS Lambda is a serverless compute service that lets customers run code without provisioning or managing servers. As part of the AWS Lambda team in Dublin, you'll work on one of the fastest-growing services in AWS, processing trillions of invocations monthly for millions of customers worldwide.

We're seeking an experienced Software Developer to join our Dublin-based team working on AWS Lambda's Runtimes. The Runtimes team holds a unique position within Lambda, owning implementation, documentation, security updates, and supporting libraries that define how developers write and run code across multiple languages in Lambda. Unlike teams owning discrete services, Runtimes owns software with an extraordinarily large surface area spanning runtime versions across seven languages (Python, NodeJS, Java, .NET, Ruby, Go, Rust), each with its own dependencies, behaviors, and integration patterns with the Lambda platform and broader serverless ecosystem. This is a customer-visible and developer-scrutinized area in Lambda.

An SDE in this domain must possess versatile expertise across multiple programming languages and a nuanced understanding of how customers experience Lambda through its programming models. They actively engage with upstream open-source communities, ensuring Runtimes align with evolving language advancements. They simplify Runtime operations for efficiency and scalability, balancing security patching urgency against customer disruption risk.

This role offers the opportunity to solve complex challenges at scale and deliver best in class serverless customer experience.

About the team
As a team, we are dedicated to making new team members feel welcome and included. We strive to grow each other through task assignments, mentorship, and trainings. As an Amazonian, you’ll work with some of the most talented engineers in our industry. We believe in attracting, developing and retaining talent from diverse backgrounds. We value different perspectives and looking for team players who are working effectively with teams of diverse peers.

Basic qualifications

- Experience (non-internship) in professional software development
- Experience designing or architecting (design patterns, reliability and scaling) of new and existing systems
- Experience designing or architecting (design patterns, reliability and scaling) of new and existing systems, or experience debugging, profiling, and implementing best software engineering practices in large-scale systems
- Experience with open source tools and resources
- Strong programming skills in at least two of the following: Java, Python, Node.js, Go, Rust

Preferred qualifications

- Bachelor's degree in computer science or equivalent
- Experience with full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations

Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice (https://www.amazon.jobs/en/privacy_page) to know more about how we collect, use and transfer the personal data of our candidates.

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.

How we rate this

Software Development Engineer (open-source), Runtimes at Amazon rates 0 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.

Classification

Little AI. AI is not part of the work.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Key facts

Software Development Engineer (open-source), Runtimes is an open job at Amazon.
Level rates this role AI Level 1 of 4: Little AI.
The role is based in IE, D, Dublin.
The job was posted on October 19, 2026.
Seniority: senior.
Applications are handled by Amazon. Apply on Amazon

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

Software EngineeringServerlessDistributed SystemsSecurityPythonNode.jsJavaGo

Also common in software engineer jobs at this level

C++Kubernetes TypeScript React Docker JavaScript

Pay

Typical software engineer job: $167k

This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs

Questions you could be asked

Tell me about a project where software engineering was part of your work. What did you do?
Tell me about a project where serverless was part of your work. What did you do?
Tell me about a project where distributed systems was part of your work. What did you do?
Tell me about a project where security was part of your work. What did you do?
Walk me through how you've used Python in your day-to-day work.

Adapt your resume

List these exact terms on your resume: Software Engineering, Serverless, Distributed Systems, Security, and Python. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.

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