Senior Infrastructure Engineer / Lead Site Reliability Engineer

The Opportunity

Are you an experienced Infrastructure Engineer or Site Reliability Engineer who enjoys building, owning and scaling cloud infrastructure in fast-moving technology environments?

We're partnering with an exciting, high-growth US technology startup looking to appoint an experienced Senior Infrastructure Engineer / Site Reliability Engineer to take ownership of critical infrastructure and help scale its technology platform.

This is an opportunity to join an ambitious engineering organisation where you'll have significant technical ownership, influence infrastructure architecture and work on challenging problems involving scalability, reliability and performance.

We're particularly interested in engineers who have previously worked within high-growth Series A–D technology startups, where they've taken ownership of an infrastructure stack or significant infrastructure components.

This isn't a traditional infrastructure support position. We're looking for someone who enjoys building, automating and improving systems, with the technical expertise to make architectural decisions and deliver production-ready infrastructure.

The Role

As a Senior Infrastructure Engineer, you'll play a key role in designing, building and maintaining the cloud infrastructure supporting the company's continued growth.

Your responsibilities will include:

Taking ownership of critical cloud infrastructure components and services.
Designing, building and scaling production infrastructure within AWS.
Managing and developing Infrastructure as Code using Terraform.
Deploying and operating production-grade applications using Kubernetes, particularly Amazon EKS.
Improving infrastructure scalability, performance and reliability.
Developing automation to streamline infrastructure provisioning, deployments and operational processes.
Managing and optimising database infrastructure, including PostgreSQL and MySQL.
Identifying infrastructure bottlenecks and implementing improvements.
Supporting infrastructure architecture decisions as the business continues to scale.
Working closely with Software Engineers and wider engineering teams to ensure reliable application delivery.
Implementing monitoring, alerting and observability practices.
Supporting infrastructure security and compliance requirements.
Helping establish engineering best practices for infrastructure management and deployment.

What We're Looking For

We're looking for a technically strong engineer with experience building and scaling infrastructure in demanding, high-growth technology environments.

Essential Requirements – Must Have

1. High-Growth Startup Experience

5+ years of professional experience as an Infrastructure Engineer, Site Reliability Engineer or Backend Engineer with significant infrastructure responsibilities.

2. AWS & Terraform

Strong hands-on experience managing production cloud infrastructure within AWS.
Commercial experience using Terraform to provision, configure and manage infrastructure.
Experience designing scalable, reliable and secure cloud environments.
Strong understanding of Infrastructure as Code principles and automation.

3. Kubernetes (Amazon EKS)

Proven experience deploying and managing production-grade applications at scale using Kubernetes (EKS).
Experience managing containerised workloads within production environments.
Strong understanding of Kubernetes architecture, deployments, scaling and troubleshooting.
Ability to identify and resolve complex infrastructure and orchestration challenges.

4. Database Management

Experience managing relational databases, particularly PostgreSQL or MySQL.
Understanding of database performance, reliability and scalability.
Experience supporting databases within production cloud environments.

Desirable Experience

We'd also be particularly interested in candidates with:

Experience working at established infrastructure-focused technology companies.
Previous experience scaling infrastructure through significant startup growth.
Knowledge of SOC 2 compliance and associated infrastructure security requirements.
Experience developing infrastructure automation and internal engineering tooling.
Strong software engineering or backend development experience.
Experience implementing monitoring, observability and incident management practices.
An engineering degree, ideally from a highly regarded university.

About You

We're looking for someone who enjoys taking ownership of complex technical challenges and building infrastructure that can scale.

You'll be someone who:

Has a genuine engineering mindset and enjoys building rather than simply maintaining infrastructure.
Takes ownership of technical problems from initial investigation through to resolution.
Is comfortable making infrastructure architecture decisions.
Understands the challenges of scaling technology within a rapidly growing startup.
Enjoys working collaboratively with Software Engineers and technical leadership.
Has a proactive approach to reliability, automation and infrastructure improvement.
Thrives in a fast-paced environment where technical decisions have a direct impact on business growth.
Can communicate complex technical concepts clearly and effectively.

Technology Environment

You'll be working with technologies including:

Cloud Infrastructure: AWS

Infrastructure as Code: Terraform

Containers & Orchestration: Kubernetes, Amazon EKS

Databases: PostgreSQL, MySQL

Infrastructure Engineering: Automation, Scalability, Reliability, Cloud Architecture

Security & Compliance: Cloud Security, SOC 2

Why Consider This Opportunity?

This is an excellent opportunity for an experienced Infrastructure Engineer or SRE looking to take on significant technical responsibility within a growing technology business.

Interested?

If you're an experienced Infrastructure Engineer, Site Reliability Engineer or Backend Engineer with strong AWS, Terraform and Kubernetes (EKS) expertise, we'd love to hear from you.

We're particularly interested in candidates who have taken ownership of infrastructure within Series A–D technology startups and have a proven track record of building and scaling production environments.

Apply today with your latest resume for a confidential discussion.

CRG – People & Transformation

New Jobs

Senior Infrastructure Engineer / Lead Site Reliability Engineer