Juan Ramirez

Senior Full Stack AI Engineer with 7+ years building secure, regulated platforms across healthcare, FinTech, and EdTech, and recent production experience shipping LLM-powered workflows, RAG search, and the data pipelines that feed them. Built and deployed a HIPAA-aligned patient intake platform now in active use across 5 practices and more than 6,000 patient registrations. Engineered regulated digital banking services supporting more than 500,000 users.

Measurable impact includes 120+ hours of manual work automated monthly and a 23% lift in buyer engagement.

Senior Full Stack AI Engineer at Lindy (2025-02 – Present)

• Built and maintained customer and operations platforms using React, Next.js, FastAPI, PostgreSQL, and Docker — with Claude Code accelerating day-to-day development — supporting more than 10,000 monthly interactions across web and WhatsApp channels.
• Deployed OpenAI- and Claude-powered workflows using LangChain and LangGraph for assisted content generation, inquiry handling, and structured reporting.
• Built the ingestion pipeline behind Pinecone-backed RAG, extracting company and campaign data from PostgreSQL and third-party APIs, normalizing and chunking it, and running scheduled re-embedding jobs to keep the index current — reducing unsupported responses by 17%.
• Led AI infrastructure build-versus-buy decisions, engineering delivery, and developer hiring, balancing scalability, delivery speed, and long-term maintainability.

Senior Full Stack Engineer at Acquire.com (2024-07 – 2025-02)

• Built and launched a zero-to-one B2B marketplace for buying and selling businesses across web and mobile in under eight months using TypeScript, React, React Native, Node.js, and NestJS.
• Designed modular backend services using MongoDB and Redis to support business listings, user profiles, and end-to-end acquisition workflows.
• Engineered an Elasticsearch-powered discovery system, including the MongoDB-to-Elasticsearch sync and reindexing pipeline, that translated plain-language buyer criteria into relevant acquisition opportunities — increasing buyer engagement by 23%.
• Implemented end-to-end Stripe payment workflows supporting secure marketplace transactions across web and mobile.
• Automated deployments with GitHub Actions, Firebase, and Google Cloud, enabling faster, safer, and repeatable production releases.

Lead Backend Engineer at Orbital Education (2021-06 – 2024-06)

• Architected and delivered Java-based EdTech platforms supporting more than 5,000 students across operations, reporting, and administration workflows.
• Designed Spring Batch ETL pipelines on Quartz schedules, consolidating student information, attendance, and grading data into audit-ready PostgreSQL reporting models and processing roughly 30,000 records nightly.
• Hardened pipelines with restartable job steps, skip policies, and failure alerting, replacing manual spreadsheet exports and eliminating over 120 hours of reporting work each month.
• Built secure Java and Spring Boot services with REST APIs, role-based access control, and real-time executive dashboards served from the reporting layer.
• Led a team of three engineers and collaborated with QA across technical planning, mentoring, Java code reviews, quality processes, and production delivery.
• Used Terraform to define and manage repeatable infrastructure environments, improving deployment consistency and supporting reliable production releases.

Backend Engineer at Q2 Holdings (2020-05 – 2021-05)

• Engineered Java and Spring Boot microservices for a regulated digital banking platform serving more than 500,000 users across authentication, account management, investment, and transaction-processing workflows.
• Developed secure REST APIs using Spring Security, OAuth 2.0, PostgreSQL, and Redis to support financial operations across web, iOS, and Android applications.
• Implemented RabbitMQ-based asynchronous messaging to decouple transaction events and feed downstream processing across banking services.
• Partnered with product, compliance, and operations teams to translate regulatory requirements into secure technical designs and production-ready banking features delivered quarterly.
• Helped implement Jenkins- and Docker-based CI/CD pipelines, Maven builds, and JUnit standards adopted by more than 15 internal teams, reducing deployment risk and improving release efficiency.

Mobile Engineer, Part-Time at Bottle Rocket (2019-03 – 2020-05)

• Maintained and modernized native Android and iOS applications using Java, Kotlin, Swift, Objective-C, C, and C++, improving stability, performance, and maintainability.
• Developed and debugged performance-critical C/C++ components shared across mobile applications, resolving native crashes, memory issues, and runtime bottlenecks.
• Profiled CPU, memory, and application behavior using Android Profiler and Xcode Instruments, then refactored affected native and platform-specific components.
• Integrated native C/C++ functionality with Android through the NDK and JNI while supporting interoperability with existing iOS code.
• Collaborated with client product and engineering teams to prioritize production issues and deliver reliable mobile updates.

Bachelor's Degree in Computer Science – Fontbonne University (2016-08 – 2020-05)