Job description:
- About the role:
O3 is hiring a senior AWS Platform Engineer for a roughly six-month contract, supporting the infrastructure, routing, and production cutover for an enterprise digital platform migration for a membership-association client.

This is a combined architecture and hands-on build role. You’ll lead the cloud infrastructure and edge-layer architecture end to end, from design through production cutover, while working alongside O3 and the client’s separate front-end vendor.

O3 will remain the primary client-facing lead, while this contractor will own the technical architecture and implementation for the infrastructure, routing, and cutover workstream.
- Engagement Details:
- Contract role with an immediate start
- Approximately six month engagement
- Expected workload:
- ~10 hours per week during discovery phase
- ~20 hours per week for approximately 10 weeks during the build phase
- Tapering part-time support toward launch, with focused availability required around the January production cutover
- What you’ll do




- Lead the solution architecture for infrastructure, routing, and platform cutover, including defining the boundary between O3’s platform work and the front-end vendor’s build
- Design and implement a redirect and routing solution using AWS CloudFront
- Stand up AWS infrastructure, including VPCs, public/private subnets, peering, and environment configuration across test and production
- Build and manage infrastructure-as-code and CI/CD workflows using GitHub
- Set up and manage a Neon Postgres deployment
- Configure the CloudFront edge layer and implement redirect-based routing
- Stand up edge security using AWS WAF, rate limiting, and bot protection
- Provision TLS through ACM and plan and execute a live DNS cutover for a high-traffic site, including the runbook, rollback plan, smoke testing, and post-launch hypercare
- Validate connectivity and routing across Vercel, WordPress VIP, Salesforce, and other third-party services to e

📌 Senior Aws Cloud Infrastructure Engineer (Buenos Aires)
🏢 Braintrust
📍 Buenos Aires