Principal Cloud Engineer (Multiple)

Cloudscaler; Greater London; On-site; GBP 95,000 - 130,000; Full time

Benefits offered by this job

Discretionary bonus

Security clearance bonus

Share options

25 days' annual leave

Training budget

Health & wellbeing support

Pension

Job summary

Cloudscaler is seeking a Principal Cloud Engineer (AWS) in London to lead enterprise cloud platforms and secure, scalable infrastructure. The role will require frequent travel to customer sites in London, with onsite work up to several days per week depending on client needs.

You will design production-ready foundations, automate platforms with Terraform, and mentor engineers while collaborating across teams to deliver end-to-end cloud transformations. Strong AWS expertise is highly beneficial.

Qualifications

• Deep understanding of platform and infrastructure engineering concepts and why they matter.
• Experience with multi-account, multi-tenant or landing zone patterns in any cloud is a strong signal.
• Strong hands-on Terraform and automation skills with opinions on IaC structure and modularisation.

Responsibilities

• Define and lead technical strategy across enterprise-scale cloud platforms, focusing on IaC modularisation.
• Design and build secure, production-ready platform and infrastructure foundations.
• Automate complex platforms with Terraform.
• Package services into AMIs, Docker or Serverless.
• Work directly with customers, driving cloud transformations end to end.
• Apply site reliability best practices and help shape mature security models.
• Mentor engineers and raise the technical bar across cross-functional teams.

Skills

AWS expertise

Terraform automation

Leadership

CI/CD pipelines

Cloud architecture

Tools

Terraform

Docker

AWS

Serverless

Job description

Principal Cloud Engineer (AWS) - (Multiple)

Location

Our offices are in Central London, along with several of our customers. Travel to our customer sites is required, the frequency of which will vary from customer-to-customer. You need to be able to travel onsite to London up to 3 days per week, although onsite requirements will vary week-to-week and customer-to-customer from 0 to 3 days.

Salary

£95,000 - £130,000

Defence/SC Clearance Requirements

SC clearance is required for our customer facing teams. You do not need active SC clearance as we will undertake checks upon you joining, but you must be eligible to pass SC clearance. DV clearance may be required for certain roles, so the ability/willingness to pass DV clearance is advantageous but not essential.

About us

We help major public and private sector organisations scale cloud and AI with speed, control and clarity. Hard-won experience sits behind a values-led business that does the right thing, puts customers first and builds partnerships on trust rather than lock-in.

Our work is practical. We design secure, production-ready foundations that hold up in the real world and deliver lasting value, without the waste that slows most transformations down. And we don't advise from the sidelines. We build, fix and deliver ourselves, with no offshoring, no resource-padding and no compromises.

What you'll do

• Define and lead technical strategy across enterprise-scale cloud platforms, with a strong view on IaC modularisation.
• Design and build secure, production-ready platform and infrastructure foundations.
• Automate complex platforms with Terraform.
• Package services into AMIs, Docker or Serverless.
• Work directly with customers, driving cloud transformations end to end.
• Apply site reliability best practices and help shape mature security models.
• Mentor engineers and raise the technical bar across cross-functional teams.

What we're looking for

We hire for platform and infrastructure engineering ability first, and cloud provider second. Our delivery is on AWS, so deep AWS expertise is a strong advantage, but we're equally interested in exceptional engineers from Azure, GCP or multi-cloud backgrounds who understand the concepts and can pick up the specifics fast.

• Deep understanding of platform and infrastructure engineering concepts, and the ability to explain why they matter, not just how they work. Experience with multi-account, multi-tenant or landing zone patterns, in any cloud, is a strong signal of this.
• Strong hands-on Terraform and automation skills, with clear opinions on IaC structure and modularisation. We favour Terraform partly because it's cloud-agnostic, which fits how we think: the concepts travel, the provider is secondary. We care more about whether you can defend your reasoning than about any single answer.
• Proven experience leading cross-functional teams and mentoring engineers.
• Strong hands-on cloud knowledge, with the judgement to choose the right service for the job. Deep AWS expertise is highly beneficial.
• Experience operating cloud platforms at scale, ideally in regulated environments.
• Solid grasp of secure, scalable and resilient architecture, including how to prevent, detect and remediate security risks.
• Awareness of SRE principles and operational priorities, experience with CI/CD pipelines, and strong system design skills.
• Networking, data and identity depth all count strongly in your favour.

We hire people who are genuinely curious about technology. The engineers who thrive here tend to build and tinker beyond the day job, whether that's home automation, a side project, or pulling something apart just to understand it, and they can talk about it with real enthusiasm. That curiosity, paired with a growth mindset, matters to us as much as any single tool on your CV.

Benefits

• Discretionary bonus
• Discretionary security clearance bonus for those holding certain clearance
• Periodic offer of share options schemes
• 25 days' annual leave
• 5 additional days per year towards training, certifications, or charity work
• Option to buy additional annual leave up to 5 days per year
• Public holidays opt-out scheme, the option to work on public holidays creating the flexibility to enjoy your time off when it suits you
• Certifications and training expensed
• Life Assurance
• Long Term Disability cover
• Employee Assist Programme for employee advice and support (including legal and counselling helpline)
• Health, Mental Health, Wellbeing, Financial and Legal support
• 24/7 GP access
• Pension auto-enrolment and contribution
• Employee referral scheme
• Client referral scheme
• Cycle to work scheme
• Travel expenses policy

Interview Process

1. Chat with Talent Team

2. Remote interview with Hiring Manager

3. Technical interview (remote)

4. Final in-person with Leadership Team

Cloudscaler are proud to be an equal opportunity employer, committed to equal opportunities regardless of gender identity, sexual orientation, race, ancestry, age, marital status, disability, parental status, religion or medical history.

If you require reasonable adjustments during the recruitment process or within the workplace, please let us know when you speak to our Talent Acquisition team or contact