Skip to content
View djdembeck's full-sized avatar

Highlights

  • Pro

Block or report djdembeck

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse
djdembeck/README.md

Hi, I'm David.

Software engineer at Laxamentum Technologies. I build backend systems and infrastructure — and, increasingly, the AI tooling that builds them with me. I value privacy and speed above pretty much everything else, so nearly everything I run is self-hosted and local-first.

Lately: AI agents, all the way down

Most of my work now runs through agentic workflows I've built, tuned, and dogfooded:

  • Mira — self-hosted AI code review for GitHub, GitLab, and Forgejo. A full-repo index gives the reviewer real project context beyond the diff, a feedback loop learns review rules from human corrections, and OSV.dev scans watch dependencies. It reviews the PRs across my repos and our org's.
  • oh-my-pi — the coding-agent harness I use and hack on daily (recent work: first-class Forgejo support). It runs roboomp, a triage bot that classifies incoming issues, reproduces bugs in isolated worktrees, writes the fix, and opens a PR — repro, cause, fix, verification included. I file an issue; a PR shows up.
  • AxonHub — the open-source LLM gateway all of this routes through. I'm the most active contributor outside the maintainer.

The model mix rotates constantly — that is the point of the gateway — but the pattern is stable: open-weight models do essentially all the work. Qwen, Kimi, GLM, DeepSeek, and MiniMax carry the agent workloads; GPT gets the occasional call, begrudgingly; self-hosted models (Gemma, Qwen — served over vLLM, SGLang, and llama.cpp) handle anything that shouldn't leave the building.

Nerd stats — since I flipped the gateway on
  • ~60B tokens routed
  • 1.67M requests — with a 100% success rate over the last 30 days
  • Dozens of models in active rotation across every major open-weight family

This is how a release I'd been building toward for years finally started moving at the pace it deserved.

Building: AudiobookDB

AudiobookDB is a community-maintained audiobook metadata database — a proper separation of books and releases, moderated contributions, and fast search. Closed-source, but the site is live and growing. Go/Chi/Ent + PostgreSQL on the back, SvelteKit 5 on the front, Typesense underneath. 900+ PRs deep, most of them landed with the agent workflow above. It's the successor to my earlier audnexus metadata API (210+ stars), and sits alongside bragibooks (200+ stars — audiobook library cleanup, itself mid-rewrite to Go + SvelteKit) and m4b-merge (90+ stars — a Rust CLI for merging audiobooks into M4B).

Local inference

An RTX 6000 Pro (96 GB) handles local LLM inference — for privacy, reliability, tuning headroom, and speed. vLLM, SGLang, and llama.cpp serve the models; a custom Go router sits in front doing GPU-aware admission control and tiered routing. TTS, image generation, and embeddings run locally too.

When I do rent GPUs:

  • NeuralWatt (referral) — my primary cloud provider. Professional operation, support answers near 24/7. Their recent pricing change isn't my favorite and their energy efficiency is still a work in progress, but the reliability earns the slot.
  • Synthetic (referral) — founding member, one pack. Good people; reliability and support responsiveness have been rough, so it's not my daily driver.
  • NanoGPT (referral) — new-model testing, niche models, and a catch-all backup.

Homelab

17+ nodes: a Raspberry Pi 5 cluster, Proxmox LXCs, and an Unraid box with the GPU. Everything deploys on git push — Docker Compose rolls out across the fleet via self-hosted CI. Traefik for ingress, OIDC for SSO, Borg backups encrypted to three locations, SOPS/age for secrets, distributed MinIO across the Pis.

My personal Forgejo instance hosts the private projects where a large share of my daily commits land, and I put my code where my mouth is: I contributed Forgejo support to Mira and Kodus (my code reviewer before Mira), hardened it in roboomp, and my own tools ship with it from day one.

If a tool I need doesn't exist, I build it: annalist (AI-generated release notes from git webhooks), llm-router-go (the GPU router above), mira-pr-tools, forgejo-cli. The org's CI runners live on my hardware, its reviews run on my automation — filling gaps in the stack is half the fun.

The stack

  • Languages: Go, TypeScript, Python, Rust, SQL
  • Frameworks: SvelteKit, FastAPI, Chi, Ent
  • Infrastructure: Docker, Proxmox, Unraid, Traefik, PostgreSQL, Redis, Typesense, MinIO, Forgejo
  • AI: vLLM, SGLang, llama.cpp, AxonHub, anything OpenAI-compatible

Off-duty

  • Motorcycles: Nice weather means I'm off the computer. I ride a Kawasaki ZX6R and ZX10R.
  • Fitness: Former Yoga Sculpt instructor. Still train hard, but traded the mat for the saddle.
  • Plex: Technically a "Plex Ninja," now just a power user.
  • Life: Hanging out with my dog, Leah 🐶.

I got into software because of bugs other people missed and never fixed. That turned into a stubborn attention to detail: nothing is ever truly perfect, but software should work the way you expect it to. Most of what I build — at Laxamentum or on my own — exists because the tool I needed either didn't exist or didn't meet that bar.

I like hard infrastructure problems, lean systems, and software that respects its users. If you're building something along those lines, I'm always open to a conversation.

Pinned Loading

  1. laxamentumtech/audnexus laxamentumtech/audnexus Public

    An audiobook data aggregation API that harmonizes data from multiple sources into a unified stream. It offers a consistent and user-friendly source of audiobook data for various applications.

    TypeScript 211 12

  2. Audnexus.bundle Audnexus.bundle Public

    An Audnexus client proof of concept for Plex, providing rich author and audiobook data. Developed in Python, offering enhanced user experiences via Plex's legacy plugin agent system.

    Python 650 34

  3. m4b-merge m4b-merge Public

    A high-performance Rust CLI to merge audiobooks into consistently tagged M4B files. Zero runtime deps, native chapter embedding, and 10x faster processing.

    Rust 90 15

  4. bragibooks bragibooks Public

    An audiobook library cleanup and management tool built with Python and Django. Leveraging m4b-merge for audiobook standardization and editing. Ideal for enhancing audiobook library management.

    Python 216 28