Edge to metal.One developer.
Markus / Codevena — Fullstack · DevOps · AI Integration based in Düsseldorf.
Design, Build, Deploy, Operate. 11 live products. End-to-end ownership — now ready for a team.
$ whoami
markus / solo-dev
$ stack --summary
edge: cloudflare · metal: hetzner
runtime: next · node · workers
$ availability
internship → from Oct 2026
$
[01]
11
Products shipped
[02]
95+
Lighthouse mobile
[03]
Edge → Metal
Stack breadth
[04]
Solo → team-ready
Since 2024
§ 01 — Principles · operating manifesto
How I build.
Infrastructure is chosen per problem. No one-stack ideology, no framework gymnastics.
P/01 · EDGE
Edge-native where it wins.
Own hardware where it matters.
Own hardware where it matters.
P/02 · SIMPLICITY
Vanilla JS and static files beat most framework gymnastics.
P/03 · OWNERSHIP
Ship end-to-end.
No front-end-only excuses.
No front-end-only excuses.
P/04 · PRAGMATISM
Infrastructure chosen per problem — no "one-stack" ideology.
§ 02 — Live products · production traffic
11 things, shipped.
Each product: Design, Build, Deploy, Operate. Solo. From edge games to realtime multilingual platforms.
FEATURED · PRODUCTION SAAS
09
Flashbuddy
flashbuddy.app · case study →
Full learning SaaS — FSRS spaced repetition, AI flashcards, gamification, Stripe.
- FSRS EngineMemory-stable spaced repetition with per-user parameters.
- AI PipelineFlashcards, quizzes, OCR and PDF import — credit-gated.
- Stripe Billing4 tiers + credit packs · idempotent webhooks.
- Self-Hosted StackCoolify on a dedicated Hetzner server · Cloudflare edge · push-to-deploy.
Next.js 16Prisma 6PostgresStripeOpenAICoolify
Open case study ↗
JUST SHIPPED · BILINGUAL SAAS
10
Capypad
capypad.com · case study →
Bilingual SSR code-quiz across 10 languages. pgvector HNSW dedup, hardened admin-content push API.
- Bilingual SSRDE/EN equal-quality across 10 programming languages.
- pgvector HNSWSemantic dedup at insert · 1536-dim · cosine NN · O(log n).
Next.js 16DrizzlePostgres + pgvectorNextAuth v5Coolify
Open case study ↗
01
AzadiFeedazadifeed.com · case study →
Real-time crisis feed for the Iranian diaspora. Trilingual with full RTL support.
Next.js 15MongoDBSocket.IOOpenAITelegram
→
02
AI Buildsaibuilds.dev · case study →
Multi-page website that AI agents collectively build and evolve.
ExpressMCPClaude
→
03
Shattergridshattergrid.com · case study →
Browser Geometry Wars clone. Edge-hosted leaderboards, 20K-particle pools.
Three.jsES ModulesNginx · DockerCF WorkersD1
→
04
Stack Surgestacksurge.app · case study →
Arcade stacker with cross-device progression and a 60 FPS delta-time canvas loop.
Vanilla JSCanvasSupabase
→
05
DefOrbitdeforbit.com · case study →
Co-op HTML5 space shooter running entirely on CF Edge. Stateful rooms via Durable Objects.
CanvasWorkersDurable ObjectsD1WebSockets
→
06
ToolPrimetoolprime.dev · case study →
Suite of free dev + creator browser tools. No signup, no tracking.
Astro 6TailwindCF Workers
→
07
Ludotekgithub.com/codevena · case study →
Retro game library — scans 66 platforms. IGDB + AI metadata enrichment.
Next.js 14Prisma 6SQLiteIGDBOpenRouter
→
08
AgoraHubagorahub.dev · case study →
Open registry for AI agents. A2A ↔ MCP bridge, self-hosted on Coolify.
Next.js 16Prisma 6PostgresA2AMCP
→
11
cvmakecvmake.codevena.dev · case study →
Fork-friendly OSS CV builder, npx-installable from npm. YAML → PDF across 12 templates, Puppeteer renderer, pixelmatch VRT.
Next.js 16PuppeteerZodpnpm + TurbonpmMIT OSS
→
§ 03 — Stack · working toolchain
The toolchain.
What's in daily use. Chosen per problem, not per ideology.
Frontend / UI
/01
- Next.js 13/14/15/16 · React 19 · TS
- Tailwind v4 · shadcn/ui · Radix · Motion
- Vanilla JS · HTML5 Canvas · 60 Hz fixed-step
- Three.js · Shaders · Bloom · 20k particles
- Axe 0 serious/critical · Playwright E2E
Backend / Runtime
/02
- Node.js · Express · Server Actions
- Auth.js · GitHub OAuth · Allowlist
- Prisma 6.x + PostgreSQL 16
- MongoDB · SQLite · Supabase
- WebSockets · Socket.IO · Durable Objects
Edge / Cloudflare
/03
- Pages · Workers · D1 · R2
- Durable Objects (stateful rooms, hibernation)
- Zero-origin for games & static-first
- Presigned PUTs · S3-compatible
Self-Host / DevOps
/04
- Hetzner dedicated · hardened Ubuntu
- Coolify · Docker · compose · standalone
- GitHub webhooks · blue-green deploys
- Tailscale mesh-VPN · fail2ban · auditd
- BorgBackup · GitHub Actions · Sentry
- Umami (self-hosted analytics)
AI Integration
/05
- OpenAI · Real-time classify + translate
- Claude + MCP · FS · render tools
- OpenRouter · cost-/model-flexible
- Metadata enrichment pipelines
Quality / Security
/06
- Vitest + Testing Library · Playwright
- ESLint strict · --max-warnings=0
- TS strict · noUncheckedIndexedAccess
- Allowlist-auth · defense-in-depth
- Append-only audit log · diff compute
§ 04 — Origin · trajectory
The long path.
From VB.NET bots to edge-native apps. The detour was the way.
Started at 18 with VB.NET bots for Final Fantasy XI. Long Python detour. 2024 — rediscovery in the AI era. Since then: Solo, by design.
◦ 18 / ORIGIN
VB.NET · Final Fantasy XI
First lines of code were game bots. Packet-sniffing, state machines, schedule loops — before I knew what those things were called.
◦ PYTHON ERA
The long detour
Years of scripting, data pipelines, automation. The hard discipline: things that run in the dark, alone, unattended.
◦ 2024 / REDISCOVERY
AI era · ship loop
From single-feature prototypes to end-to-end ownership. Edge architectures, self-hosting, AI integration as first nature.
◦ 2026 / NOW
11 Products · Live
Edge games, realtime feeds, AI agent runtimes, retro game libraries — all shipped solo. Now looking to do this inside a team.
§ 05 — Meta · how the site runs
How Codevena runs.
Hetzner + Coolify + Tailscale as home base. Cloudflare Edge for games. Coolify-orchestrated Docker DBs (Postgres · Mongo · Redis).
CASE STUDY · SYSTEM TOPOLOGY
Edge to metal. And back.
Each product picks its substrate: zero-origin for games (CF Pages + Worker + D1), Next.js + Prisma + Postgres on Coolify behind Traefik (Letsencrypt) for portfolio + CMS sites, Durable Objects for stateful rooms.
Architecture diagrams are abstracted — no hostnames, ports, or versions public. Defense-in-depth via DB re-reads on every server action. Append-only audit log with diff computation.
edgemetal◦ LIVE · ~42 rps
[ EDGE ] cloudflare
[ PROXY ] traefik
CODEVENA.DEV
[ METAL ] hetzner
[ MESH ] tailscale
◦ INTERNSHIP · FROM OCT 2026
Solo-built. Now ready for a team.
I'm retraining as a Fachinformatiker — Anwendungsentwicklung (BBQ Düsseldorf, graduating 2027) and I'm looking for a 6-month internship from October 2026. Teamwork, real codebases, real projects — that's exactly what I'm after.
Get in touch◦ CONTACT · INTERNSHIP & PROJECTS
Let's talk about a team to grow in.
[email protected]Just drop me a line about the role — I reply fast. Happy to hop on a call or interview, simply say so in the mail.