Lead AWS Platform Engineer

PEXA; Greater London; On-site; GBP 100,000 - 120,000; Full time

Job summary

PEXA is seeking a hands-on Lead AWS Platform Engineer to shape the Go team's platform strategy and architecture, translating plans into reliable, secure infrastructure. You will own design reviews, deployment pipelines, and platform upgrades, working with engineers, product teams and operators.

Expect on‑call rotation and a strong emphasis on security, observability and cost efficiency. You'll build and operate production platforms in AWS (EKS, RDS/Aurora, MSK, S3, IAM), develop IaC with

Qualifications

• Hands-on AWS platform engineering experience.
• Strong Terraform experience with modules and state management.
• Experience with EKS and Kubernetes.
• Experience designing and operating production platforms in AWS.
• Knowledge of cloud security, vulnerability management and cost optimisation.

Responsibilities

• Design, build and improve AWS services (EKS, RDS/Aurora, S3, MSK, IAM, networking).
• Develop and maintain infrastructure as code using Terraform and deployment pipelines.
• Plan and deliver platform upgrades and lifecycle improvements.
• Improve platform reliability, security, observability and cost efficiency.
• Work with engineering teams on safe deployments and incident response.
• Lead design and code reviews and share technical direction.

Skills

AWS

Terraform

Kubernetes

EKS

RDS/Aurora

S3

IAM

Networking

Monitoring/Observability

CI/CD

Security

On-call

Tools

Kong

Unleash

Job description

• We’re looking for a hands‑on Lead AWS Platform Engineer to join the PEXA Go team. You’ll help shape the platform’s strategy and architecture, then turn that direction into reliable, secure and well‑supported infrastructure
• This is a strong individual contributor role. You’ll work closely with platform and software engineers, product teams and operational colleagues, bringing the technical ownership and follow‑through to keep platform work moving
• You’ll help deliver the platform roadmap, balancing planned improvements with operational needs. That means getting involved in the detail: designing and deploying infrastructure, managing upgrades, improving automation and resolving complex technical issues
• Turn platform strategy, architecture and standards into practical plans and working solutions
• Design, build and improve AWS services that support PEXA Go, including EKS, RDS and Aurora, MSK, S3, IAM and core networking
• Develop and maintain infrastructure as code using Terraform, along with the pipelines that deploy it
• Plan and deliver platform upgrades, lifecycle work and technical improvements
• Improve platform reliability, resilience, security, observability and cost efficiency
• Work with engineering and operational teams on safe deployments, incident response and service readiness
• Share technical direction through design reviews, code reviews, troubleshooting and practical collaboration
• Keep documentation, operating procedures and architecture records up to date
• Take part in the paid platform engineering on‑call rota
• You’ll be self‑sufficient and comfortable taking the lead on platform activity, while working as part of a wider team. You’ll bring a point of view on strategy and architecture, make sound technical decisions within agreed guardrails, and involve the right people when a decision has wider implications
• There are no direct reports currently. Your focus will be hands‑on engineering, technical leadership and helping the platform capability develop as the team grows

You’ll have strong experience building and operating production platforms in AWS, and be comfortable taking complex engineering work from design through to deliveryKnowledge of cloud security, vulnerability management and cost optimisationThe judgement to balance delivery pace with reliability, security, supportability and costStrong Terraform experience, including modules, testing, version control and state managementExperience with monitoring, logging, tracing and actionable alertingPractical expertise in EKS, Kubernetes, AWS networking, identity and access management, storage, databases and managed messagingClear communication and a collaborative approach to working across technical teamsExperience with CI/CD and secure deployment practicesA good understanding of high availability, backup, disaster recovery, failover and capacity managementExperience with platforms such as Kong or Unleash, or in financial services or another environment with demanding resilience and assurance requirements, would be useful