Geoff Leediker

Full-Stack Community Platform · Sole Developer

• Designed, built, and launched a hyperlocal community platform, now live in closed beta with real users: threaded discussions, voting, real-time direct messaging, search and discovery, and full moderation and admin tooling.
• Built on Next.js 15 and TypeScript with a Postgres backend, implementing row-level security policies, authentication, file storage, and real-time subscriptions for live message delivery.
• Engineered a server-side image pipeline that strips EXIF metadata and transcodes to WebP, and completed two full security reviews with no major findings.
• Owned every layer of the product: architecture, database schema, front end, security posture, brand, and launch planning.

AWS Bedrock · RAG · Lambda

• Built an LLM application on AWS Bedrock using retrieval-augmented generation that pulls live data through an API into a JSON feed and autonomously generates written output on a schedule (Lambda and EventBridge).

Fine-Tuned Mixtral · RAG · Cloud GPU

• Fine-tuned an open-weights Mixtral model and deployed it on cloud GPU as a conversational agent, with helper agents that structure and vectorize unstructured data into a retrieval store the model draws on for context.

AWS · Client Project

• Designed an end-to-end AWS architecture for a client: selective sync of a 30 TB library into isolated, encrypted S3 buckets, tiered Cognito and least-privilege IAM access, CloudFront delivery, and Glacier lifecycle tiering.
• Delivered the architecture diagram, cost model, and a working prototype.