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Corey R.
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Corey R.

Senior Full-Stack & AI Developer | Python, React, APIs, Automation

I build AI agents, RAG systems, web apps, and API automations with Python, React, Next.js, and TypeScript. My work includes Synapse's pgvector retrieval system and Procore/Microsoft 365 integrations. I'm Corey, a senior full-stack developer with 15+ years of experience and the founder of Rosecraft Studios. I build practical software around a defined workflow, with clear acceptance criteria and a documented handoff. AI AGENTS, RAG AND LLM INTEGRATION I built Synapse, an internal knowledge-retrieval and agent-memory system using TypeScript, Node.js, PostgreSQL and pgvector. It combines document ingestion, embeddings, vector and keyword search, source references, tenant-scoped retrieval, and MCP access. My Cortex work covers LLM provider integration, tool calling, approval controls, run history and usage tracking. I also built a Next.js/OpenAI web application with streaming responses and multi-turn conversations. PYTHON, APIs AND WORKFLOW AUTOMATION REST and SOAP API integration, FastAPI webhooks, data synchronization, scheduled jobs, CSV processing and validation. My Procore/Microsoft 365 work connected construction data with SharePoint, reporting and file routing. Related Python work includes signed webhook processing and a spreadsheet/text-PDF parser that checks line arithmetic and totals, records source references, and flags ambiguous input. WEB SCRAPING AND DATA PIPELINES Python, Selenium, requests and pandas for extracting data from static and JavaScript-rendered sites, normalizing records, deduplicating across sources, and exporting usable CSV files. I have also built a Tebra SOAP-to-Azure SQL pipeline supporting Power BI patient reporting. FULL-STACK WEB APPLICATIONS React and Next.js interfaces, Node.js, Python and PHP backends, authentication, dashboards, internal tools, portals and database integration. My work includes React/Node.js maintenance and integration contributions to GiveTrack, plus Python/PostgreSQL modernization, compatibility fixes and structured logging. MOBILE AND MEDIA AUTOMATION React Native/Supabase development, including authentication, assessment flows, results and subscription screens. I developed a leadership assessment app through TestFlight delivery preparation. I also built a Python/FFmpeg pipeline that turns CSV inputs and supplied assets into personalized MP4 videos. CORE TECHNOLOGIES Python, FastAPI, PHP, JavaScript, TypeScript, React, Next.js, Node.js, PostgreSQL, pgvector, MySQL, Supabase, React Native, OpenAI API, Claude/Anthropic integrations, MCP, Selenium, pandas, REST APIs, GraphQL, Docker and AWS. I also work with Vue.js, Angular, Unity and Unreal Engine. I can own a scoped deliverable or work alongside your engineering team. You will know my role, any team involvement, the important tradeoffs, and how we will verify the result. Send me your current stack, a sample input or workflow, and the result you need. I'll help define a practical first milestone.

🇺🇸Temecula, United States$35/hr100% JSS5.00 (29)Since Sep 2022
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Earnings and projects

MRR
$8.2k

Last 6 months ÷ 6

World#2,010 / 412k
🇺🇸Country#861 / 62.1k
Revenue, last 30 days
$3.9k

Last 6 months: $49k

World#8,465 / 412k
🇺🇸Country#2,431 / 62.1k
Total earnings
$70k

Billed in all: $70k

World#56,611 / 412k
🇺🇸Country#10,780 / 62.1k
Per project
$1.2k

$1.8k in the last 6 months

World#111,238 / 412k
🇺🇸Country#18,969 / 62.1k
Projects, last 6 months
28

Across 30 contracts

83% fixed17% hourly
World#3,253 / 412k
🇺🇸Country#584 / 62.1k
Projects in all
59

Across 64 contracts

81% fixed19% hourly
World#51,622 / 412k
🇺🇸Country#7,880 / 62.1k

Earnings, last 30 days

$70.5k+$3.9k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$66k$68k$70k$72kOct 9Oct 24Nov 8

Skill rankings: Top 0.38% in Web Scraping

Top 1% in 6 of 20 skills, ranked by MRR among everyone on Upwork with the skill.

  1. #7rag implementation237 freelancers · 🇺🇸 #1Top 3%
  2. #10Software Debugging409 freelancers · 🇺🇸 #1Top 2%
  3. #15Web Scraping3,925 freelancers · 🇺🇸 #5Top 0.38%
  4. #22AI Model Integration1,618 freelancers · 🇺🇸 #7Top 1%
  5. #42FastAPI4,337 freelancers · 🇺🇸 #12Top 0.97%
  6. #65Supabase4,116 freelancers · 🇺🇸 #19Top 2%
  7. #72Web Application9,341 freelancers · 🇺🇸 #28Top 0.77%
  8. #125React Native10,486 freelancers · 🇺🇸 #41Top 1%