Site Reliability Engineer, Cryptography, Access and Identity Services

AmazonWebServices; Greater London; On-site; GBP 44,000 - 72,000; Full time

Job summary

Amazon Web Services in London is seeking an experienced Site Reliability Engineer to build, operate and scale cloud services in a 24/7 production environment. You will automate operations, mentor juniors, and drive reliability improvements using Linux, scripting, and AWS tooling.

The role emphasizes collaboration across teams, incident response, and implementing best practices for maintainable, secure services at scale in a fast-moving AWS environment.

Qualifications

• Experience in site reliability engineering (SRE) or related fields.
• Experience working with Linux systems.
• Experience in systems engineering and DevOps practices.
• Experience with scripting in Python/Bash/Shell or equivalent.
• Knowledge of TCP/IP and networking protocols (HTTP, DNS).
• Ability to design and review scripts for maintainability, scalability, and security.
• Experience in a 24/7 production environment.
• Experience with service-oriented architecture and web services.

Responsibilities

• Build and operate services for customers.
• Automate service operations and deployment methods.
• Provide mentoring for junior team members.
• Troubleshoot and implement fixes using Linux skills.
• Provide data and metrics to manage capacity and efficiency.
• Identify and troubleshoot network connectivity issues.
• Develop, deploy, operate, and grow services in cloud production environments.
• Use trends and metrics to identify improvements.
• Refine procedures used by the team and internal customers.
• Conduct root-cause analysis of customer issues and negative metric trends.
• Implement operational excellence best practices and reduce manual toil.

Skills

SRE / systems engineering

Linux

Scripting (Python/Bash)

Networking basics (TCP/IP, HTTP, DNS)

24/7 production environments

Tools

AWS

Bash

Java

Python

Perl

PHP

Ruby

Linux

Cloud

Security

HTTP

Job description

Salary: £44,000 - 72,000 per year

Requirements

• Experience in site reliability engineering (SRE), systems engineering, systems administration, DevOps, security administration, or network administration
• Experience working with Linux
• Experience in systems engineering
• Experience in any of the following: Python, Java, Perl, PHP, Ruby, Bash, Shell or equivalent
• Knowledge of TCP/IP and networking protocols such as HTTP and DNS
• Experience designing and developing scripts to automate operational burdens and reviewing scripting changes to ensure they meet the standards for maintainability, scalability and security
• Experience working in a 24/7 production environment
• Experience with service-oriented architecture and web services

Responsibilities

• Build and operate services for our customers
• Automate service operations and deployment methods
• Provide mentoring for junior team members
• Troubleshoot, innovate fixes and workarounds, and keep software up to date using Linux skills
• Provide data and metrics that help manage the capacity and efficiency of our services
• Identify and troubleshoot network connectivity issues using networking knowledge
• Develop, build, deploy, operate, sustain, and grow services in cloud production environments
• Use trends and metrics to identify opportunities for improvements
• Help develop and refine procedures used by our team and internal customers
• Dive deep into root cause analysis of customer issues and investigate negative metric trends
• Implement Operational Excellence best practices and automate manual processes to reduce out-of-hours support toil

Technologies

• AWS
• Bash
• Cloud
• Cryptography
• DevOps
• HTTP
• Support
• Java
• Linux
• Network
• PHP
• Perl
• Python
• Ruby
• Security
• TCP/IP
• Web
• AI

More

We are AWS, part of Amazon Web Services, the worlds most comprehensive and broadly adopted cloud platform. We work in a collaborative, purposeful and enthusiastic environment, focused on building and operating critical Cryptography, Access and Identity services at massive scale. We value diverse experiences, inclusive team culture, mentorship and career growth, and work/life balance. We encourage candidates to apply even if they do not meet every preferred qualification, and we are committed to creating an environment where our people can deliver disruptive products, solve first-order problems, and reduce manual toil across our organization.

last updated 36 week of 2026