Senior AWS Platform Engineer

About the role

Initial project is replacing a 15-year-old Solr search index - and the surrounding integration layer - with an AI-native retrieval and generation platform on AWS Bedrock + OpenSearch. The new platform serves 9 AI use cases across a 23-site WordPress multisite running on Cloudways (GCP), with on-prem SQL Server data flowing in via Mule 4 ESB, attachments in S3, and a Salesforce-sourced membership of ~45,000 executives. You own the AWS infrastructure that makes all of it work. OpenSearch cluster ops, Bedrock integration, Lambda + SQS event-driven ingestion, API Gateway for the unified publisher contract, IAM topology across accounts, cost guardrails that hold against a published $10-18k/yr ceiling at 10x current Solr volume, and the observability story that lets Product see prompt/response traffic in production. You'll work alongside an external architecture partner (Santex Lab) during Phase 1 for knowledge transfer. The pattern is clear: Santex leads weeks 1-2, you pair weeks 3-8, you lead weeks 9-16, you own from week 17. By the time Foundation goes GA, the internal team owns the platform - not the consultancy.

Responsibilities

• OpenSearch Managed Service
• Cluster sizing, instance class selection, node count for the realistic + 10x growth scenarios.
• Index design (content / profile / metadata indices), mapping per index, k-NN configuration.
• Snapshot/restore strategy, upgrade cadence, capacity planning.
• Hybrid query construction with the AI/RAG engineer (you own the cluster; they own the retrieval logic).
• RBAC pre-filter performance - this is the integration point where your work meets theirs.
• Bedrock integration
• Model access provisioning, regional routing, quota management.
• Bedrock Knowledge Bases for the Chair Assistant + member-facing use cases.
• Bedrock Guardrails configuration framework (the AI/RAG engineer defines policies; you operationalize them).
• Cost monitoring per model, per use case, per tenant where applicable.
• Event-driven ingestion
• API Gateway in front of a single SQS queue - the "unified queue" pattern that lets cloud sources (cloned PISO Solr plugin, S3 attachment cascade) and on-prem sources (BI signal publishers from SQL Server) publish to the same envelope schema.
• Lambda consumers per content shape (content / attachments / BI signals). DLQ handling, partial failure semantics, replay tooling.
• Concurrency tuning, cold-start mitigation, throttling at the right boundaries.
• Signed envelope validation at the API Gateway edge.
• IAM and multi-account topology
• Account strategy for AI workloads - dedicated AI account, isolation from production WordPress, SSO/role mapping.
• Cross-account access patterns where data crosses boundaries (S3, Aurora, Bedrock).
• Least-privilege roles for every Lambda, every service-to-service call. Policy review cadence.
• SOC2 readiness work alongside internal IT (account provisioning, audit logging, network controls).
• Network
• VPC design for AI workloads.
• On-prem connectivity for the Phase 4 Meeting Prep CDC pipeline (first time the internal organization runs Python tooling against on-prem SQL Server in production). VPC peering, security review, hybrid networking.
• Public/private surface separation - API Gateway authenticated boundary vs internal-only Lambda paths.
• Observability and cost
• CloudWatch dashboards spec - what to monitor, alert thresholds, escalation paths.
• Per-prompt/per-response capture pipeline (a Phase 1 deliverable Product team requires for visibility).
• Cost monitoring - Bedrock per-model spend, OpenSearch RI optimization, Lambda invocation cost, S3 storage classes.
• Budget alerts wired to

Benefits

Additional Information

Santex is a global Certified B technology company as well as one of North America's fastest-growing companies, according to the Inc. 5000. It's present in 18 countries and over 100 cities, and headquartered in Argentina with offices in the United States, Mexico, and Peru. Its two service lines - AI Tech Consulting and AI-Optimized Engineering - help organizations comprehensively adopt technology, expand their capabilities, and improve business outcomes at scale. The same approach defines its culture: Santex has 80.4% employee engagement (global average: 21%), 8% annual turnover (tech sector: 20-25%), 9,369 training hours invested in 2025 - more than double the global average -, and a 26.5% year-over-year reduction in carbon footprint, achieving carbon neutrality through offsetting. Santex. A company with purpose and judgment. Yes, it's possible. We are an Equal Opportunity Employer and are committed to fostering an inclusive and diverse workplace. We do not discriminate on the basis of race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, genetic information, or any other characteristic protected by applicable law. All qualified applicants will receive consideration for employment without regard to any of these factors. We strongly encourage candidates from all backgrounds to apply.

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