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Santex is a integral Certified B technology company and one of North America's fastest-growing companies, present in 18 countries and over 100 cities, 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: *****%), 9,369 training hours invested in ****—more than double the global average—and a 26.5% year-over-year reduction in carbon footprint, achieving carbon neutrality through offsetting.
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.
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, including OpenSearch cluster ops, Bedrock integration, Lambda + SQS event-driven ingestion, API Gateway for the unified publisher contract, IAM topology across accounts, cost guardrails, and the observability story that lets Product see prompt/response traffic in production.
You'll work alongside an external architecture partner 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.
What you'll own
OpenSearch Managed Service – Cluster sizing, instance class selection, node count for 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; RBAC pre-filter performance.
Bedrock integration – Model access provisioning, regional routing, quota management; Bedrock Knowledge Bases for the Chair Assistant & member-facing use cases; Bedrock Guardrails configuration framework; cost monitoring per model, per use case, per tenant.
Event-driven ingestion – API Gateway in front of a single SQS queue; Lambda consumers per content shape; DLQ handling, partial failure semantics, replay tooling; concurrency tuning, cold-start mitigation, throttling; signed envelope validation at the API Gateway edge.
IAM and multi-account topology – Account strategy for AI workloads; cross-account access patterns; least-privilege roles; policy review cadence; SOC2 readiness work alongside internal IT.
Network – VPC design for AI workloads; on-prem connectivity for Phase 4 Meeting Prep CDC pipeline; VPC peering, security review, hybrid networking; public/private surface separation – API Gateway authenticated boundary vs internal-only Lambda paths.
Observability and cost – CloudWatch dashboards specification; per-prompt/per-response capture pipeline; cost monitoring – Bedrock per-model spend, OpenSearch RI optimization, Lambda invocation cost, S3 storage classes; budget alerts wired to throttle rules & model downgrade triggers.




Operational data services – Aurora Postgres or S3 Parquet for Meeting Prep BI signal store; DynamoDB for meeting prep cache layer; S3 dual-bucket attachment pattern with private REST proxy and public Nginx URL.
Must-have qualifications
7+ years of cloud infrastructure / platform engineering; 4+ years hands-on AWS at production scale.
Deep OpenSearch (or Elasticsearch) operational experience: cluster sizing, index design, snapshot/restore, query optimization, k-NN configuration.
Production Lambda + SQS event-driven systems: DLQ patterns, idempotent consumers, partial-failure handling, concurrency tuning, cold-start mitigation.
API Gateway in production: auth, request validation, throttling, signed payloads.
IAM at scale: multi-account, cross-service, least-privilege design; experience with security audits.
CloudWatch & observability: dashboards, alarms, log aggregation, slow-query analysis.
AWS cost engineering: Cost Explorer, budget alerts, RI/Savings Plans, per-service waste detection.
Infrastructure-as-Code: CloudFormation, CDK, or Terraform.
Strong written communication: runbooks, ADRs, IAM policy rationale, incident reports.
Strongly preferred
AWS Bedrock production experience – model invocation, Knowledge Bases, Agents, Guardrails, quota management.
Compliance work – SOC2, HIPAA, or comparable audit experience.
Hybrid cloud / on-prem connectivity – VPC peering, Direct Connect, VPN, security review processes.
CDC / change data capture pipelines – Debezium, native SQL Server CDC, or comparable.
Multi-account AWS Organizations setup – SSO, Control Tower, account vending, cross-account roles.
Experience supporting a Solr-to-OpenSearch migration – parallel-run cutover, traffic shifting, deprecation triggers.
Nice to have
Aurora Postgres operational experience (schema migration, backups, query tuning).
DynamoDB single-table design and capacity-mode tuning.
Experience operating on top of Cloudways or any managed-WordPress host for the integration boundary.
Familiarity with Mule 4 ESB as an integration boundary.
Background in regulated or enterprise SaaS (financial services, healthcare, legal, executive education).
Familiarity with Bedrock Agents and their appropriate use cases.
Advanced English
Excellent verbal and written communication skills in English.
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📌 Senior Aws Platform Engineer (Zárate)
🏢 Santex
📍 Zárate