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.

Sampler Instrument Plugin · Solo Developer

• Designed and built a sampler instrument plugin in C++ and JUCE as an alternative to Ableton's stock sampler, shipping as VST3, AU, and a standalone app from one codebase. Now in private pre-beta.
• Replaced JUCE's stock reverb, chorus, and compressor with custom DSP (a feedback-delay-network reverb with RT60-based decay, a multi-voice ensemble chorus, and a soft-knee compressor with sidechain filtering) and integrated Signalsmith Stretch for real-time time-stretch and pitch-shift.
• Built a real-time-safe engine: lock-free atomic voice state, 32-voice polyphony, a modulation matrix and macro system, and a built-in sequencer, arpeggiator, and piano roll.
• Caught a debug-vs-release measurement error that had skewed performance tuning by roughly 15x, then re-measured against release builds. Ran an AI-assisted audit of the audio path that surfaced a buffer-overflow risk and audio-thread memory deallocation, and wrote automated tests to keep both fixed.

Mobile Physics Game · Solo Developer

• Designing and building an endless physics launcher for iOS and Android in Unity 6: a hold-to-charge cannon fires a ragdoll stuntman across a procedurally generated course, scored by distance.
• Built weighted procedural spawning with a distance-based density ramp and spacing variance, plus eight interactive object types (trampolines, explosives, fans, speed pads, spike pits, mud, brick walls, rough terrain) driven by custom overlap detection after Unity 6 trigger callbacks proved unreliable.
• Implemented a Firebase backend (anonymous auth and Firestore) powering a global leaderboard across five categories: distance, top speed, average speed, peak altitude, and games played.
• Integrated AdMob interstitials into the restart flow. In-app purchase, final UI and audio polish, and store submission are still ahead.

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.