AWS Application Migration Architect

Job Description

Position: AWS Core Architect

Location: Hybrid - London

Contract Type: Contract Inside IR35

Security Clearance: BPSS/SC Clearance required

In this contract, you will lead the architecture assessment of Legacy application estates and design exactly how they will land, run, and operate on a newly established AWS core cloud platform.

Legacy Assessments

• Conduct deep-dive architectural assessments of Legacy applications, evaluating technology stacks, data flows, interfaces, and operational models.

Target Landing Design

• Define target account structures, network placements, compute/storage patterns, and IAM configurations using standard AWS landing zone architectures.

Migration Strategy

• Formulate concrete migration treatments (rehost, replatform, refactor, etc.) and address dependencies, cutover sequences, and rollback strategies.

Core AWS and EKS Patterns

• Design specific integration patterns for S3, VPC, IAM, KMS, CloudWatch, and CloudTrail. Define managed Kubernetes/EKS landing patterns where container runtimes are required.

Infrastructure as Code

• Ensure all designs are fully translated using Terraform or CloudFormation.

Deliverables

• Author high-quality Architecture Decision Records (ADRs), transition-state designs, migration design documents, and operational runbooks.

Essential Experience

• 5+ years of dedicated cloud architecture experience, with at least 2+ years of hands-on experience executing complex AWS migrations.
• Active AWS Certified Solutions Architect - Professional credential.
• Extensive knowledge of core AWS services, specifically VPC, IAM, KMS, CloudWatch, CloudTrail, AWS Config, S3, EC2, RDS, and Lambda.
• Strong expertise in designing AWS Landing Zones and workload isolation patterns.
• Hands-on experience with IaC tools specifically Terraform or CloudFormation and migration tooling such as AWS Application Migration Service (MGN) and Database Migration Service (DMS).
• Experience drafting assessment packs, as-is/to-be architectures, migration roadmaps, and ADRs.
• Basic Scripting capabilities in Python or Bash.
• Exceptional stakeholder communication skills, with a proven ability to bridge technical designs with business requirements.

Highly Desirable (Nice to Have)

• Prior experience executing large Legacy-to-cloud migrations within highly regulated environments.
• Experience with Kubernetes/EKS tooling such as Argo CD, Flux, Prometheus, Grafana, or Istio.
• A broader multi-cloud perspective (Azure or GCP).