Joshua Alvarado

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Senior Software Engineer

ScaleAI

Oct 2024 - Current (1 year 11 months)

• Built enterprise RAG platform serving finance and healthcare clients with Next.js chatbot interface, FastAPI backend, and vector search implementing hybrid retrieval with semantic chunking for multi-format document processing. • Developed LLM evaluation infrastructure for SEAL Leaderboards benchmarking frontier models across coding, math, and safety domains, creating interactive visualization dashboard and GraphQL API for programmatic access. • Engineered synthetic data generation pipelines using GPT-4 and Claude with Celery task queues, implementing quality control with reward models and optimizing embedding costs through caching strategies. • Created distributed annotation platform coordinating global contractor workforce with real-time

Senior Software Engineer

SIGMA AI

Mar 2022 - Sep 2024 (2 years 7 months)

• Architected and deployed production-grade AI applications with React/TypeScript frontends, FastAPI/Node.js backends, LangChain orchestration, and multi-agent systems using LangGraph for autonomous workflow automation. • Implemented RAG systems with vector databases and AWS Bedrock Knowledge Bases for evidence-based decision support; built streaming conversational AI interfaces with multi-turn context retention and session persistence. • Developed specialized document analysis engines with custom parsers for complex Excel/PDF documents; designed modular prompt engineering systems with structured JSON output validation and cost-optimized model selection. • Created integration platforms translating natural language into executable visual wor

Senior Software Engineer

Ramp

Oct 2020 - Feb 2022 (1 year 5 months)

• Built automated receipt matching system using React, Node.js, and Google Cloud Vision API that processed receipts via email, mobile upload, and Slack integration with intelligent matching algorithm. • Developed Bill Pay platform backend in Python/Django that automated invoice-to-payment workflows including OCR-based data extraction, approval routing, and payment execution across multiple payment rails. • Designed and implemented approval workflow engine with state machine pattern supporting customizable routing rules, multi-stage approvals, and asynchronous job processing using Celery and Redis. • Built bidirectional accounting system integrations that synchronized transaction data and automated month-end reconciliation processes with ent

Full Stack Engineer

Toptal

Jan 2018 - Sep 2020 (2 years 9 months)

• Built a project management platform with real-time task notifications for a growing startup team, evolving from initial MVP to supporting 500+ daily active users across 50+ concurrent projects. • Created a personal finance dashboard that synced with users' bank accounts via Plaid API, reducing manual expense entry time by 80% and helping 2,000+ users track spending patterns. • Developed a content management system for a publishing client handling 1,000+ articles monthly, implementing scheduled publishing workflows that reduced editor workload by 40%. • Led frontend modernization initiative migrating from class components to React Hooks, reducing codebase complexity by 30% and improving developer onboarding time. • Designed authentication

Software Engineer

Airtable

Sep 2016 - Dec 2017 (1 year 4 months)

• Contributed to the launch of Airtable Universe by developing the primary user interface for the template gallery, focusing on the browsing and discovery experience for community-shared bases. • Engineered the base publishing workflow using React and Redux, which enabled users to snapshot their databases, sanitize sensitive information, and share them publicly. This system utilized AWS S3 and a CDN for optimized asset delivery. • Enhanced the performance of the template preview feature by implementing lazy-loading strategies and caching for metadata, leading to a more responsive and faster-loading user experience. Tech Stack: React, Redux, JavaScript (ES6+), Node.js, Webpack, AWS S3, AWS CloudFront

Software Engineer Intern

Airtable

Jun 2016 - Aug 2016 (3 months)

• Contributed to the development and rollout of Kanban View, implementing front-end features to enable visual task management and drag-and-drop functionality across boards. • Built and optimized API endpoints to support Forms and Calendar View integrations, improving data validation and real-time synchronization for collaborative workflows.

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