I build and ship
production systems.
Rotterdam. Software engineering, with electrical work in reach.
What I do
Product engineering
Schema and security model, application, deployment pipeline, monitoring. I take the whole thing rather than a layer of it.
- Design Thinking before code: stakeholder research, Figma prototypes, then a build of what was tested.
- Web apps in Vue, React or Next.js with TypeScript, and mobile apps in Flutter from the same design.
- Supabase or Postgres behind it, with the schema and the access rules written before the screens are.
Systems and infrastructure
Containerised services, queues, scheduled work, and enough observability to know when any of it breaks.
- Hosting on Vercel and Cloudflare, or on your own Ubuntu servers, set up and managed from the terminal.
- Services in Docker containers, with Kubernetes when the scale actually calls for it.
- Postgres, MongoDB or ClickHouse, with Grafana dashboards on top so a problem reaches you before a customer does.
Electrical installation
Registered under SBI 43212, and trained for it before I wrote software for a living. Where a project reaches into the physical world I can take that side too, instead of handing it off.
- Indoor 230V installation: distribution board, circuit breakers and residual-current devices.
- Wiring pulled through PVC conduit, with sockets, switches and lighting points placed and connected.
- Home automation and network cabling, measured and tested before handover.
Who you would be working with
I'm Davino Rosaria. I came to software through hardware, which is why this company is registered for both.
Electrical engineering and automation in Aruba, then embedded systems in The Hague, then software engineering in Leiden. The electrical registration is not a second business. It is where I started, and it is why a project that reaches into the physical world does not have to be handed to someone else halfway through.
By day I develop internal platforms at Delta Fiber, with Vue and TypeScript on the front and Node services behind them, querying MongoDB, PostgreSQL and ClickHouse over high-volume telecom data. I write the Linux automation that deploys it, and I build the AI tooling and MCP servers the team uses to move faster.
DD Techniek & IT is the work I take on under my own name. The same standard, and a shorter line between you and the person writing the code.
- Based
- Rotterdam, Netherlands
- Studied
- Electrical Engineering (Automation) · Networks & Embedded Systems · Minor Robotics, Home Automation and Industrial Automation · Interactive Technologies
- Languages
- Dutch · Papiamento · English · Spanish
- Works with
- TypeScript · Vue · React · Node · Python · C# · PostgreSQL · MongoDB · ClickHouse · Docker · Linux
Building something that has to work?
Tell me what it needs to do and I'll tell you what it takes.