Carlos Alberto Martinez Martinez

• Led backend development of a multi-tenant SaaS platform using Node.js/NestJS and a React/Next.js 14 (App Router) frontend; established test coverage baselines with Jest and Playwright, reaching 80%+ coverage across critical user flows. • Built an AI document-analysis feature using LangChain (RAG over PostgreSQL + pgvector) and OpenAI GPT-4o, enabling contract review automation; instrumented with LangFuse for latency tracking and prompt evaluation. • Owned the backend architecture of a certification management platform built with Java/Spring Boot and PostgreSQL, handling audit workflows, document validation, certification lifecycle, and integrations with enterprise client systems. • Migrated a monolithic REST API to a GraphQL federation layer (Apollo Router + Apollo Server subgraphs), decoupling 6 independently deployable services and cutting cross-team coordination overhead. • Designed a real-time notification system using WebSockets and Redis Pub/Sub; wrote integration tests with Supertest and MSW to validate message delivery guarantees before each release. • Automated the CI/CD pipeline with GitHub Actions — lint, unit tests, integration tests, Docker build, and AWS ECS rolling deploy — reducing manual release steps and shortening deploy cycle from days to under an hour. • Built a LangGraph-based multi-agent workflow (2024) for automated data extraction from unstructured PDFs, replacing a manual QA process that consumed ~15 analyst hours per week. • Introduced Datadog dashboards and structured JSON logging across services, enabling the team to diagnose production issues through traces rather than log-grepping. • Mentored 3 mid-level engineers via code reviews and weekly design sessions, establishing team conventions for TypeScript strict mode, API versioning, and test organization.

• Owned backend architecture for a certification and compliance platform built on Node.js/Express and PostgreSQL, handling certification lifecycle workflows, audit management, and client data processing for enterprise clients. • Led a cross-functional team of 6 engineers to rebuild the frontend as a Next.js SSR application with React Query and Redux Toolkit, improving Time to First Byte and making the app fully crawlable for SEO — previously a client-side-only SPA. • Introduced Jest + React Testing Library as the team's testing standard, writing initial test suites for shared UI components and critical form workflows, reducing regression reports after releases. • Developed a Java/Spring Boot microservice for high-throughput shipment event ingestion (processing bursts of 10K+ events/minute), separating compute-intensive work from the Python monolith. • Designed a Node.js/RabbitMQ event-driven pipeline for async order-processing jobs, separating concerns from the synchronous API layer and making the system recoverable under load spikes. • Built a HIPAA-aligned data access layer on AWS (RDS, S3 with server-side encryption, CloudTrail audit logs); coordinated with the security team to pass an internal compliance review in 2021. • Set up GitHub Actions pipelines for automated testing and staging deployments, replacing a fully manual QA + FTP-based release process the team had inherited.