Senior Platform Engineer

Third Nexus Group Limited; Greater London; Hybrid; GBP 90,000 - 110,000; Full time

Benefits offered by this job

Remote-friendly

Career growth

Job summary

Third Nexus Group Limited is recruiting a Senior Platform Engineer in London. The role focuses on driving a modern enterprise Azure and Kubernetes platform, with senior ownership of IaC, GitOps, and platform engineering in a regulated environment.

The position is hybrid (1 day on-site) with a strong emphasis on architectural leadership, CI/CD automation, and secure, scalable cloud infrastructure.

Qualifications

• Senior Platform/Infrastructure/Cloud Engineering experience in regulated enterprise settings preferred.
• Deep mastery of Microsoft Azure architecture and IAM/Entra ID concepts.
• Advanced Terraform IaC skills to build modular, reusable templates.
• Hands-on Docker, Kubernetes and Helm; declarative configuration management.
• Experience designing and operating CI/CD pipelines with GitLab CI or similar.
• Strong scripting skills (PowerShell/Bash) and coding in Python or Go; YAML expertise.
• Experience with observability stacks (Splunk/Prometheus/Grafana).
• Excellent communication to explain risk, decisions and standards.

Responsibilities

• Lead the platform and cloud roadmap within the Platform & Infrastructure practice.
• Design, provision, and secure a scalable Azure cloud estate across compute, storage and identity.
• Architect and optimize CI/CD pipelines and infrastructure delivery using GitLab, Terraform, Kubernetes and GitOps.
• Set reusable guardrails, reference architectures and golden paths for compliant delivery.
• Collaborate with architects and engineering teams to drive cloud adoption and modernization.
• Drive telemetry, logging and observability for high availability and resilience.
• Produce architectural runbooks and blueprints to raise engineering standards.

Skills

Azure Foundation

Terraform

Docker

Kubernetes

Helm

GitLab CI

Scripting (PowerShell/Bash)

Python/Go

YAML

Observability tools

Tools

GitLab CI

Terraform

Docker

Kubernetes

Helm

Prometheus

Grafana

Splunk

Job description

Senior Platform Engineer

London (Hybrid - 1 day per week onsite)

Perm

Up to £100,000pa

We are partnering with one of Europe’s most prestigious wealth managers. Backed by a globally renowned private banking group with deep heritage and stability, our client manages several billion in assets across the UK.

As part of a major technology modernisation push, they are appointing a Senior Platform Engineer to drive the technical design, evolution, and automation of their enterprise Microsoft Azure and Kubernetes platform ecosystem.

This is a senior, high-impact mandate offering significant technical ownership over infrastructure-as-code, GitOps-driven delivery, and modern platform engineering standards within a highly regulated environment.

Key Responsibilities

• Technical Leadership & Roadmap Execution: Serve as a hands-on technical lead within the Platform & Infrastructure practice, driving the execution of the firm’s enterprise cloud and platform roadmap.
• Cloud & Platform Architecture: Design, provision, and maintain a resilient, secure, and scalable Azure cloud estate spanning core compute, software-defined networking, storage, identity, and governance guardrails.
• Delivery Automation & GitOps: Architect and optimise enterprise CI/CD pipelines and infrastructure delivery using GitLab, Terraform, Kubernetes, Helm, and GitOps-aligned release patterns.
• Engineering Standards & Guardrails: Establish reusable platform components, reference architectures, and golden paths to accelerate application delivery while enforcing strict regulatory, security, and compliance baselines.
• Cross-Functional Modernisation: Partner closely with solutions architects, application engineering teams, and Group infrastructure counterparts to lead cloud adoption, microservice migration, and operational readiness.
• Observability & Operational Resilience: Drive end-to-end telemetry and observability initiatives across the platform estate, utilising centralised logging and metrics to ensure high availability and performance.
• Documentation & Knowledge Sharing: Produce production-grade technical artifacts, architectural diagrams, runbooks, and implementation blueprints to continuously raise internal engineering standards.

Candidate Profile

• Senior Platform Expertise: Demonstrated track record in a Senior Platform, Infrastructure, or Cloud Engineering role, with prior experience in financial services or similarly regulated enterprise settings strongly preferred.
• Azure Foundation: Deep practical mastery of Microsoft Azure architecture, covering core infrastructure services, IAM/Entra ID, network security policies, landing zones, and cloud governance frameworks.
• Infrastructure as Code: Advanced Terraform capabilities, with proven ability to build clean, modular, and reusable IaC templates to manage cloud and hybrid infrastructure.
• Containers & Orchestration: Solid hands-on proficiency with Docker, Kubernetes, and Helm; sound understanding of declarative configuration management and automated environment promotion.
• CI/CD & Pipeline Design: Production experience designing, hardening, and automating continuous integration and delivery pipelines using GitLab CI or comparable platforms.
• Automation & Scripting: Strong shell automation skills (PowerShell, Bash) alongside practical coding capability in a modern language such as Python or Go, with expert use of YAML.
• Observability Tooling: Experience implementing monitoring, tracing, and logging stacks using Splunk, Prometheus, Grafana, or equivalent enterprise tools.
• Communication & Collaboration: Exceptional communication skills with the ability to articulate technical risk, architecture decisions, and operational standards to both technical peers and cross-functional leadership