Senior DevOps Engineer – AWS / ECS Migration – £475-525 per day, Outside IR35

Senior DevOps Engineer

Location: Fully Remote (Must be UK-based)

Duration: Initially 3 months (Very likely extensions)

Rate: £475-525 per day (Outside IR35)

Start Date: ASAP

Interview Process: 1 stage, 45 minute Virtual

Unify is proud to exclusively represent a fast growing SaaS business, who is looking to engage the services of an experienced Senior DevOps Engineer on a Contract basis for initially 3 months.

Intro

We’re looking for a Senior DevOps Engineer to lead the first two phases of a critical infrastructure transformation over a 3–6+ month period. This high-impact engagement will modernize our clients platform and expand their global infrastructure. The successful contractor will play a leading role in migrating applications from Heroku to AWS, containerizing services in ECS, and launching a production environment in a second region (US). This is a delivery-focused contract role for someone who thrives in fast-moving environments and can work autonomously to hit the ground running.

Project Scope – What You’ll Deliver

As part of this engagement, you’ll take ownership of delivering the following:

Phase 1: UK Core Infrastructure Migration:

• Containerize key services and migrate workloads from Heroku to AWS ECS
• Implement VPC networking, IAM, security groups, and other foundational components
• Build as Infrastructure as Code (IaC) using Terraform or equivalent tools

Phase 2: US Region Expansion:

• Architect and deploy a second production region in the US
• Set up global load balancing, failover, and replication strategy
• Ensure adherence to data residency and latency requirements

Key Responsibilities

• Define and implement secure, scalable infrastructure patterns
• Build CI/CD pipelines and automation tooling for deployments
• Establish monitoring, logging, and alerting for distributed environments
• Create documentation and optionally provide handover training for internal teams
• Recommend optimizations for cost and performance

You Will Bring

We’re looking for a technically strong, delivery-focused Senior DevOps Engineer who is:

• Independent and proactive — able to take ownership of projects with minimal oversight
• Outcome-oriented — focused on hitting clear milestones within the engagement window
• Highly collaborative — comfortable partnering with dev teams and stakeholders remotely
• Security-minded and detail-oriented.

You Should Be Excited By

• Designing and delivering global, scalable infrastructure
• Working with fast-moving teams on ambitious modernisation efforts
• Introducing DevOps best practices and setting strong foundations
• Delivering real impact within a defined contract period

Contractor Requirements

Must-Have Experience:

• Proven track record leading high-impact infrastructure migrations
• Deep hands-on expertise in AWS (ECS, VPC, IAM, CloudWatch, Route 53, etc.)
• Experience migrating from Heroku to AWS or other PaaS-to-cloud transformations
• Strong Infrastructure As Code Experience (Terraform Preferred)
• Container orchestration (ECS, Fargate, or EKS)
• CI/CD tooling (e.g. GitHub Actions, CircleCI, etc.)
• Monitoring, observability, and cost optimisation techniques
• Familiarity with security controls and compliance frameworks

Nice-to-Have Experience

• Global infrastructure projects and multi-region application design
• CDN and edge delivery experience (e.g. CloudFront, Akamai)
• E-commerce or high-availability platform exposure
• Legacy system refactoring experience
• Serverless architecture exposure (Lambda, API Gateway)

Please apply in the first instance by submitting your latest CV for immediate review by our Talent Team. Thank you!