Platform
Platform engineering for large cloud estates and self-service developer workflows.
- 75+ account AWS Landing Zone Accelerator estate
- 500+ security tasks automated
- self-service developer platform on Backstage, Crossplane and Terraform
Available 1 August 2026 · Outside IR35 · UK remote
Direct contract engagements
Senior platform, SRE and DevOps
contract delivery.
Senior platform, SRE and DevOps contractor for recruiters filling hands-on cloud platform roles where delivery evidence, SC clearance and fast turnaround matter.
This page is for recruiters and hiring managers with a live contract role. I am Senna Semakula-Buuza: 8+ years building and running cloud platforms, currently completing an engagement running a 75+ account AWS estate. Everything below is verifiable.
Looking for outcome-based consultancy instead? Engagement options.
Delivery proof
75+
AWS accounts on one landing zone
500+
recurring security tasks automated
50+
product teams on an observability platform I built
80k
requests/second on a streaming platform I ran
£50K
cut per month on an FCA-regulated crypto platform
11
published engineering articles
AWS, Azure, GCP, Kubernetes, Terraform, CDK, Go, Python, TypeScript, Grafana LGTM, Prometheus and OpenTelemetry.
The commercial facts, up front
Available 1 August 2026
Outside IR35 via my own Ltd
UK remote, occasional site days
Active SC clearance to 2032
No notice period
Where I fit
Recruiters usually map me into one of these six lanes; the evidence below is public-safe and client-name free.
SRE
Reliability work across observability, incident response and high-throughput systems.
- enterprise Grafana LGTM observability platform for 50+ teams, MTTR down 30%
- streaming platform at 80,000 req/s
- published the Prometheus/Thanos/Mimir/VictoriaMetrics comparison
DevOps
Production delivery automation across modern CI/CD and infrastructure-as-code stacks.
- production CI/CD in GitLab CI (reusable components), GitHub Actions and ArgoCD
- migrated a production pipeline from Bitbucket Pipelines to GitHub Actions with OIDC
- Terraform and CDK IaC
Cloud
Cloud migration and network delivery across regulated and platform-heavy environments.
- AWS, Azure and GCP in production
- led a GCP-to-AWS landing-zone migration and on-premises-to-AWS workload migrations
- VPC, Transit Gateway, Azure CNI
DevSecOps
Security automation and access-control work that reduces operational risk.
- zero-trust access via AWS Verified Access replacing the VPN
- policy-as-code with SCPs and a policy staging OU
- 500+ automated security and compliance tasks
- published an SCP-lockout incident writeup
Go
Go delivery for platform automation, Kubernetes control planes and service backends.
- production Go at multiple fintech and platform engagements
- Kubernetes operators and a Go drift-detection CRD
- gRPC services
CV and compliance pack sent same day
Have a live role? Send the essentials first.
Send the role spec, the approved budget and the expected site cadence. I will reply the same day with a tailored CV and a straight answer on fit.