Building B2B marketplaces & real-time systems at production scale
_{Next.js · NestJS · Laravel · PostgreSQL · Tech Lead @ E-Ship Supply}

"I don't ship templates. I ship businesses."

Tip

🇹🇷 Bu profil iki dilli okunabilir. Türkçe bölümler önce, English follows. · 🇬🇧 This profile is bilingual. Turkish sections first, English follows.

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🇹🇷 Hakkımda

10 yıllık deneyime sahip Senior Full-Stack Developer ve Tech Lead. Modern web mimarileri, B2B pazaryerleri ve gerçek zamanlı sistemler üzerine uzmanlaştım. Son bir yılda 3.600+ commit ile aktif olarak ürün geliştiriyorum.

Şu an çalıştığım işler:

• 🚢 E-Ship Supply — Türkiye'nin ilk denizcilik B2B pazaryerinin teknik liderliği (108+ tedarikçi · 720+ ilan · 4 dil)
• 🌐 TeknoWeb Platform — WHMCS alternatifi modern hosting otomasyonu (Next.js + NestJS)
• 🛒 Brahma Market — Plugin mimarili premium e-ticaret altyapısı

🇬🇧 About

Senior Full-Stack Developer & Tech Lead with 10+ years of experience. I specialize in modern web architectures, B2B marketplaces, and real-time systems. Currently shipping production code with 3,600+ commits in the past year.

What I'm building now:

• 🚢 Technical leadership of E-Ship Supply — Turkey's first maritime B2B marketplace
• 🌐 TeknoWeb Platform — modern hosting automation
• 🛒 Brahma Market — plugin-based commerce platform

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🎯 Career Highlights

200+ Özel Proje custom projects shipped 2016 → 2026	100+ Aktif Müşteri active clients TeknoWeb dönemi	10K+ Eşzamanlı Bağlantı concurrent connections Socket.io + Redis	4 + RTL Dil & i18n TR · EN · AR · RU right-to-left ready
86 Prisma Modeli data models E-Ship Supply core	90+ REST Endpoint API endpoints NestJS + Swagger	%80 ↓ Deploy Hatası fewer deploy failures after CI/CD redesign	%200 ↑ Sipariş Artışı order growth PROUD, 6 months

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💡 How I Work

Hazır template kullanmıyorum. Müşterilerimi sıfırdan, tam ihtiyaçlarına özel sistemlerle dijitalleştiriyorum — tasarımdan sunucuya, ödeme entegrasyonundan reklama kadar zincirin tamamına hâkimim. Bir mühendis değil; bir teknoloji ortağıyım.

I don't ship boilerplates. I build bespoke systems end-to-end — from design to server, from payment integration to growth ops. Not just an engineer; a technology partner.

• 🧱 Architecture-first — code is the easy part; the hard part is figuring out which problem deserves to be solved at all
• 📐 Boring tech, boldly applied — Postgres > NoSQL hype, REST > GraphQL theatrics, monoliths until they hurt
• 🚀 Ship daily, refactor weekly — main is always deployable, feature flags over long-lived branches
• 🔒 Security by default — devlet düzeyi tehdit modeli, zero-trust, audit-log everything
• 🎯 Measure before optimizing — p99 over p50, real user monitoring over local benchmarks

Important

🟢 Currently open for hire — senior full-stack roles, technical leadership, B2B platform consulting, SaaS launch advisory. Get in touch →

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💼 Open To / Müsait Olduğum İşler

+ Senior Full-Stack roles  (remote · İstanbul hybrid · global timezones)
+ Technical Lead / Staff Engineer pozisyonları
+ B2B marketplace mimari danışmanlığı
+ SaaS launch teknik liderliği
+ Maritime / logistics / fintech ürün geliştirme
+ Open source maintainer rolleri (Next.js / NestJS / Prisma ecosystem)
- Junior pozisyonlar
- Pure frontend-only roller
- Cryptocurrency / NFT / gambling projeleri

📩 Get in touch: onurdilmen@teknoweb.net · Schedule a call · Sponsor my work

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🛠 Tech Stack

Frontend
Backend
Data
Infra
Realtime
Test & QA

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🚧 Now — Currently Shipping

What I'm actively building this month (✅ shipped · 🟡 in progress · ⚪ planned):

• 🚢 E-Ship Supply v3 — MySQL pooling + Prisma 6 migration (production)
• 🚢 E-Ship Supply v3 — fleet ops module (in progress, May 2026 launch)
• 🌐 TeknoWeb Platform — WHMCS migration, account provisioning state machine
• 🛒 Brahma Market — plugin marketplace MVP (commerce plugins as first-class repos)
• 📚 LocalTR — Sparkle auto-update channel for macOS app
• 🏗️ This profile README — keep evolving (you're looking at iteration #8)

📋 Full roadmap as a public kanban board: github.com/users/onurdilmen/projects/2

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📚 Currently Exploring

Curiosity-driven learning, side-project sandbox:

• 🦀 Rust + Axum — performance experiments for hot API paths
• ⚡ Bun + Hono — Cloudflare Workers deployment patterns, edge-first APIs
• 🤖 LLM orchestration — server-side AI agents, structured outputs, tool calling at scale
• 🍎 Swift 6 + SwiftUI — native macOS / iOS utility apps (concurrency model)
• 🔭 OpenTelemetry — unified tracing across Node + PHP + Postgres in the same trace tree

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🏗 Architecture Spotlight — E-Ship Supply

Turkey's first maritime B2B marketplace, designed and shipped from scratch in 2025.

graph LR
  U([Users · 4 languages]) -->|HTTPS| CF{{Cloudflare<br/>WAF + CDN}}
  CF --> WEB[Next.js 15<br/>App Router · RSC · ISR]
  WEB -->|tRPC + REST| API[NestJS 11<br/>90+ endpoints · Swagger]
  API --> PG[(PostgreSQL 17<br/>86 Prisma models)]
  API --> RD[(Redis 7<br/>cache · pub-sub)]
  API --> S3[(R2 / S3<br/>media · invoices)]
  WS[Socket.io<br/>10K concurrent] <--> API
  WS <--> RD
  API --> Q{{BullMQ<br/>jobs · emails · webhooks}}
  Q --> WORKER[Worker pool<br/>NestJS microservices]
  API --> AUTH{{NextAuth.js<br/>JWT · RBAC · 2FA}}
  classDef edge fill:#06b6d4,stroke:#0891b2,color:#fff
  classDef web fill:#2563eb,stroke:#1d4ed8,color:#fff
  classDef api fill:#e0234e,stroke:#a8174e,color:#fff
  classDef data fill:#1e3a8a,stroke:#1e40af,color:#fff
  classDef worker fill:#16a34a,stroke:#15803d,color:#fff
  class CF edge
  class WEB web
  class API,AUTH api
  class PG,RD,S3 data
  class WS,Q,WORKER worker

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Key design decisions:

• 🏛️ Monorepo with Turborepo — apps/web, apps/api, apps/worker, packages/db, packages/ui. Single CI pipeline, type-safe across the wire via Prisma + zod.
• 🌐 Edge cache aggressive, origin lean — Cloudflare serves 89% of traffic; origin Postgres queries average 12ms.
• 🔌 WebSocket pool over polling — 10K concurrent connections on a single Hetzner CX22 (€4.59/month) thanks to Redis pub/sub fan-out.
• 🌍 i18n that respects RTL natively — Arabic flows right-to-left throughout the entire UI, not just text alignment; date/number/currency formatters wired through Intl.
• 🔁 Background jobs over inline work — every email, every webhook, every invoice generation goes through BullMQ. P95 user-facing latency stays under 200ms.
• 🛡️ RBAC enforced server-side, not client-side — UI hides features; API rejects them. Two layers.

📐 Click for deployment topology & scaling notes

Deployment topology

• Edge (Cloudflare): WAF rules, image optimization, KV cache for hot product pages, R2 for static media
• Web tier (Hetzner Helsinki): Next.js 15 served via Node.js cluster behind LiteSpeed; PM2 process manager; zero-downtime via blue-green deploy
• API tier (Hetzner Falkenstein): NestJS 11 on Node 20, deployed via GitHub Actions → SSH → systemd; auto-scaling via additional worker boxes triggered by BullMQ queue depth
• Data tier: Postgres 17 primary + 1 read replica with logical replication; Redis 7 cluster mode (3 nodes) for pub/sub fan-out
• Object storage: Cloudflare R2 (S3-compatible) for media, invoices, daily DB dumps; lifecycle policies push old artifacts to glacier-equivalent

Scaling story so far

Stage	Concurrent users	Stack response
MVP launch	50	Single CX22, monolithic NestJS
Month 2	800	Added Redis, extracted worker queues
Month 4	2K	Added read replica, edge-cached listing pages
Month 6	10K	Socket.io pub/sub fan-out, Postgres connection pooling
Today	15K daily / 10K concurrent peak	Stable on the same €4.59/mo CX22 + replica

What I'd do differently

• Start with read-write splitting from day one (retrofitting was painful)
• Use Cloudflare Tunnel earlier — Hetzner firewall management got messy
• Adopt feature flags from the start (LaunchDarkly or self-host Unleash)

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🚀 Featured Work

🚢 E-Ship Supply Turkey's first maritime B2B marketplace. Designed and lead the technical development from scratch — 108+ verified suppliers, 720+ listings, 4 languages, real-time messaging with 10K+ concurrent connections. Next.js 15 · NestJS · PostgreSQL · Prisma · Socket.io · Redis · Turborepo	🚀 Next.js + NestJS Starter Production-ready full-stack monorepo template combining Next.js 15 with NestJS 11. JWT, RBAC, Swagger, CI/CD, Docker out of the box. Turborepo · TypeScript · Prisma · Docker · GitHub Actions
🍅 Pomodoro Menubar Tiny native macOS menu bar Pomodoro timer (~176KB binary). Swift + WebKit hybrid, MIT-licensed. Swift · WebKit · macOS · MIT

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📊 GitHub Stats

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🏆 GitHub Achievements

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🌍 Open Source

Recent contributions to public projects (active goal: regular OSS upstream).

• 🤝 Looking to upstream: Next.js, NestJS, Prisma, Tailwind ecosystem — feel free to nudge with good first issues
• 🛡️ Maintaining: onurdilmen/pomodoro-menubar
• 💖 Sponsoring: @sindresorhus and others — paying the OSS bill forward

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🎓 Certifications

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🛠 Daily Toolkit

The actual tools I touch every day — not aspirational, the real workflow:

Layer	Tool
Editor	Cursor + Claude Code (yes, this README was paired with AI)
Terminal	iTerm 2 · zsh · Starship prompt
Git	gh CLI · lazygit · Gitea (self-hosted) for private
DB	TablePlus · psql · Prisma Studio
API	Bruno (offline-first) · curl
Design	Figma · Affinity Designer for static assets
Notes	Apple Notes (capture) · Obsidian (long-form)
Deploy	Vercel · Hetzner Cloud · Cloudflare · cPanel/WHM
Monitor	Grafana + Loki · UptimeRobot · Sentry
Mac apps	Raycast · Rectangle · Hyperkey · TablePlus · Pomodoro Menubar (own)

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🌐 Languages

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✍️ Recent Writing

📝 Gist	10 Lessons From 10 Years Of Full-Stack Engineering — the expensive lessons from 200+ shipped projects, in 10 short bullets
🐦 X thread	Build-in-public notes and production war stories (follow @yazilimuzm)
🌐 Long-form	teknoweb.net — agency site with case studies (blog coming soon)

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📡 Latest From X

I share build-in-public notes, Turkish dev tips, and the occasional production war story over at @yazilimuzm.

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💬 Get in touch

Note

Hiring? Consulting? Open-source collab? Pick whichever channel suits you — I read everything within 24h.

If you're working on a B2B platform, a maritime / logistics product, a SaaS launch, a hosting automation project, or anything that benefits from a senior engineer who has shipped real Turkish products at scale — say hi.

_{📍 İstanbul, Turkey · 🕒 UTC+3 · Last updated automatically}