Designed and built by the same hands.
Design & engineering studio
Berlin, working worldwide
About
Syntaks is the design and engineering studio of Arif Dogan in Berlin. Ten years of shipping production software, from SaaS and fintech backends to AI platforms, and the interfaces on top. The same person designs your product and builds it, so nothing gets lost between the mockup and the merge.
Selected work
2018 — 2026
- S001 AI voice receptionistUS SaaS company, via Upwork Inbound calls, live transcription and intent routing. Empty repo to production in three weeks. Rated 5.0.
- S002 Call tracking platformSaaS company, via Upwork Seven milestones over four months: search, CRM integrations, a recording pipeline and audit logging. Rated 5.0.
- S003 Driver-hours compliance engineEU logistics client, under NDA Regulation (EC) 561/2006 encoded as a rules engine, with a test for every legal clause. Rated 5.0.
- S004 ZoiIn-house A live voice agent that books appointments and reservations by phone in German, English and Turkish.
- S005 GoVisualOpen source Zero-config request debugger for Go. Hacker News front page, about 680 GitHub stars, listed in awesome-go.
- S006 fastapi-radarOpen source Real-time debugging dashboard for FastAPI with a one-line integration. About 400 GitHub stars.
- S007 Beauty & wellness marketplaceBerlin Booking and payment services for real-time stylist matching, at 99.9% uptime.
- S008 Delivery pipeline for 20+ servicesContract CI/CD for twenty microservices: deploys cut from 30 to 8 minutes, with one-click rollbacks.
Services
- Product designInterfaces, flows and design systems in Figma, made to be built.
- WebsitesMarketing sites in Framer or Next.js that load fast and stay editable.
- Web appsSaaS products end to end with Next.js, TypeScript and Postgres.
- AI featuresAgents, RAG, voice and MCP integrations, with tracing and evals so they keep working.
- Backends & APIsGo and Python services, payments, OAuth and third-party integrations.
- Cloud & DevOpsAWS, Kubernetes, Terraform and CI/CD that make deploys boring.
Client
“He built our product on a solid, scalable foundation while moving incredibly fast. It played a big role in getting us accepted into Station F. I’d trust him again on any product.”
How it starts
- 01Call
Thirty minutes on the problem, the users and the deadline.
- 02Plan
A written scope with a fixed price for the first phase.
- 03Build
Weekly demos you can click, until it ships.
Contract directly or through Upwork, your call.
Play
Tab completes, arrows walk history.