Principal Engineer – Azure & IaC (Terraform, Pulumi)
* £90,000 – £95,000 Base Salary.
* Excellent Company Benefits (including paid technical training).
* Hybrid or Fully Remote Option – Offices in England, Scotland & USA.
* On-Call Rota – 1 week in 3 months.
* Paid travel to HQ for Product & Engineering meetups (1-2 times per month).
Areti are delighted to be partnering with one of the UK’s fastest-growing SaaS businesses in the search for a Principal Engineer with Infrastructure-as-Code experience (Terraform, Pulumi).
This award-winning organisation has achieved over 40% growth in 2025, expanding rapidly across the UK and North America. With a major multi-million-pound technology investment planned for the year ahead, this is a rare opportunity to play a pivotal leadership role in shaping a modern, greenfield-style environment that underpins their continued success.
The Role
As a Principal Engineer, you’ll take a hands-on and strategic role within the engineering organisation, driving reliability, scalability, and performance across mission-critical systems.
You’ll guide and mentor platform, SRE, and DevOps teams, ensuring operational excellence and robust automation practices throughout the organisation.
A central focus of this position will be Infrastructure-as-Code (IaC), building and scaling frameworks that support secure, automated, and repeatable environments. You’ll bring strong experience in Terraform, and ideally Pulumi, to lead environment development and set the standards for best practices in infrastructure automation.
The development team primarily codes in Python, so an understanding of Python-based tooling and Pulumi would be particularly advantageous in helping to bridge development and operations effectively.
Key Responsibilities
* Lead the design, implementation, and optimisation of IaC solutions (Terraform / Pulumi).
* Drive the reliability, performance, and scalability of production systems.
* Collaborate with Product, Engineering, and Platform teams to deliver resilient cloud infrastructure.
* Mentor and develop engineers across SRE, Platform, and DevOps disciplines.
* Support and refine CI/CD pipelines and automation frameworks.
* Play a key role in scaling engineering operations and evolving internal toolsets.
Key Skills & Experience
* Proven experience in Site Reliability Engineering or Principal DevOps roles.
* Strong Infrastructure-as-Code (IaC) expertise using Terraform and (ideally) Pulumi.
* Proficiency in Python or familiarity with Python-based DevOps tooling and automation frameworks.
* Experience leading, mentoring, and scaling technical teams within fast-growing environments.
* Deep understanding of cloud infrastructure (AWS, Azure, or GCP) and cloud-native architectures.
* Passion for automation, observability, and driving engineering excellence across teams.
* Skilled in writing clear, maintainable technical documentation to standardize practices and improve knowledge sharing.
* Experienced in designing and delivering internal training sessions, workshops, or onboarding programs to upskill engineering teams.
* Strong communication skills, with the ability to translate complex technical concepts into actionable insights for both technical and non-technical stakeholders.
Why Apply?
This is more than just another SRE or DevOps role — it’s a chance to define frameworks, tooling, and culture at scale. With the backing of significant investment, you’ll have the freedom to introduce new approaches, influence architecture, and help build a modern engineering environment that supports long-term growth and resilience.
At Areti, we pride ourselves on connecting exceptional people with outstanding opportunities. We take a relationship-led approach, ensuring the right fit for both our clients and candidates.
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