Platform Engineer

Immersum; Greater London; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

Immersum is seeking a Mid-level Platform Engineer to build and automate secure, highly available cloud infrastructure in London. This role involves driving automation, partnering with software teams, and enhancing platform observability.

The ideal candidate will have extensive AWS experience, strong Kubernetes knowledge, and solid Python skills. This role offers a hybrid working model, with 1 day per week in the office, and provides an excellent opportunity to influence cloud strategy and platform architecture.

Qualifications

• Strong experience building and supporting AWS-based infrastructure.
• Experience with Infrastructure as Code and automation tooling.
• Strong knowledge of Kubernetes and containerisation.
• Solid Python scripting and automation skills.
• Strong Linux administration and troubleshooting experience.

Responsibilities

• Designing, building and maintaining secure, highly available cloud and hybrid infrastructure.
• Partnering with Software Engineering teams to deliver scalable platform solutions.
• Driving automation through Infrastructure as Code and CI/CD pipelines.
• Building and supporting containerised workloads and Kubernetes platforms.
• Enhancing platform observability and security.

Skills

AWS-based infrastructure

Infrastructure as Code

Kubernetes and containerisation

Python scripting

Linux administration

Cloud security knowledge

Tools

Terraform

Ansible

Docker

Jenkins

GitLab

Job description

Location

London – Hybrid Working (1 day per week in the office)

Purpose

Build, automate and scale secure, highly available cloud infrastructure supporting critical financial services platforms

Overview

Immersum are supporting an established financial technology organisation as they continue to invest in their Platform Engineering capability. They are looking for a Mid-level Platform Engineer to join a high-performing engineering team responsible for delivering secure, resilient and scalable infrastructure supporting mission‑critical applications. This is an opportunity to work on complex technical challenges within a highly regulated environment, helping to drive cloud adoption, automation and platform modernisation initiatives.

The Company

The business is a well-established technology business operating within the financial services sector. They develop and deliver software platforms that support critical business processes for a global customer base. With continued growth and investment across technology, they are expanding their Platform Engineering team and are seeking an experienced engineer who can contribute to the design, delivery and evolution of their infrastructure estate.

The Role

• Designing, building and maintaining secure, highly available cloud and hybrid infrastructure environments.
• Partnering with Software Engineering teams to deliver scalable and resilient platform solutions.
• Driving automation through Infrastructure as Code, CI/CD pipelines and platform engineering best practices.
• Building and supporting containerised workloads and Kubernetes platforms.
• Enhancing platform observability, monitoring, security and operational excellence.
• Supporting cloud migration, infrastructure modernisation and platform transformation initiatives.
• Managing infrastructure performance, reliability and cost optimisation.
• Troubleshooting and resolving complex cloud, networking and infrastructure issues.
• Contributing to the adoption of modern engineering tooling and AI‑assisted development practices.

Technology

• AWS
• Terraform
• Ansible
• Python
• Docker
• Jenkins
• GitLab
• IAM & Security Controls
• Monitoring & Observability Tooling
• AI / LLM / LLMOps Platform Technologies

Qualifications

• Strong experience building and supporting AWS‑based infrastructure.
• Experience with Infrastructure as Code and automation tooling.
• Strong Kubernetes and containerisation knowledge.
• Solid Python scripting and automation skills.
• Strong Linux administration and troubleshooting experience.
• Good understanding of cloud security, networking and platform reliability.
• Experience working within complex, enterprise‑scale environments.

This is an excellent opportunity to join a growing engineering function where you'll have significant influence over platform architecture, cloud strategy and engineering standards whilst working alongside highly skilled technical teams.

If this looks of interest, please click apply to find out more.

At this time sponsorship is not on offer.