Darius Saraceno

Hey, I’m Darius.

Products you can show investors.

One person for design, development, and product. No handoffs. I build websites, mobile apps, and internal business applications in React, Next.js, and TypeScript. I own analytics, experiments, and product decisions. Currently based in Düsseldorf 🇩🇪.

Case studies

About me.

Interface, code, and the data checks behind it: no handoff between them, because one person does all three. Software architecture, UI in Figma, Python and SQL pipelines, AI workflows: one person owns every layer, so the system holds up as usage and complexity grow.

Tech Stack.

Frontend

  • React
  • Next.js
  • TypeScript
  • Astro
  • Tailwind
  • Storyblok

Data & Analytics

  • Python
  • SQL
  • PostgreSQL
  • Snowflake
  • Supabase
  • Adobe Analytics

Tooling & Delivery

  • Node.js
  • NestJS
  • Docker
  • GitLab CI/CD
  • Figma

Here’s where you’ll find answers to most of your questions.

Don’t see your question? No worries, just send me a message. Click here, and your mail app opens up.

What does design and development from one person actually mean?

I design and build the frontend myself. What you see in Figma is what ships, no AI-vibecoded product that only works on the surface. Most projects lose quality right at the handoff between design and development: details get simplified, interactions get cut. I think about code and scalability from the first design decision, so changes are faster to make later. You get one point of contact instead of two invoices. If you already have a backend team, I plug straight into your existing setup.

We already have an MVP. What do you actually do then?

I look at where you’re at and find the spots that make you look bad in front of investors or users. An MVP proves the idea works. Your next funding round needs a product that’s just as convincing. I work outward from the weak points, toward a UI with no rough edges and an architecture that can carry your next stage of growth.

Are you a generalist, or do you actually go deep enough on our stack?

I understand product decisions, UI details, and data infrastructure as one connected picture, a combination that makes handing off to more specialists unnecessary. Right now I work with React, TypeScript, Astro, and Next.js. That’s the stack running through my projects. On top of that: two years as a B2B product owner at Rewe Group, plus data analysis work at Infas360 using Python and SQL. That combination is exactly why nothing gets lost between design, code, and data when you work with me.

What does a project cost, and why a fixed price instead of hourly?

Every project gets a fixed price after an initial scoping call. As a benchmark, I calculate that from €120 an hour or €925 a day. That way you know the total cost upfront, with no surprise overtime hours. I’ll give you an exact quote once I understand your project. A fixed price keeps me motivated to work efficiently. We agree on scope and deliverables together before we start, so neither of us gets surprised later. If something comes up outside the original scope, like changes or support, I bill that hourly.

How long does a typical project take?

Most projects run 8 to 12 weeks, depending on scope. A landing page moves faster than a full product build. You’ll get a realistic timeline for your project during the scoping call.

What does the process look like, from first call to launch?

The process runs in clear stages: discovery call, UX research and wireframes, development and testing, launch. In the discovery call, I get to know your product and your goals. I usually skip high fidelity prototypes, that time is better spent building the real thing. So from wireframes, I move straight into building. You review and sign off on every stage, so nothing catches you off guard at the end.

Who is this not for?

If you’re looking for an agency with a big team and multiple points of contact, I’m not the right fit. Same goes if your project is mostly backend or infrastructure work with little to no UI. Looking for a full time hire for your core team instead? That’s a different need. I work project based, as a contractor, not as part of your team. I’m the best fit for founders with a clearly scoped project who want design and frontend handled by one person, with clear ownership in one place.

The fastest way to know is a call.

You show me where your product stands. I’ll tell you straight whether and how I can help. Anything under NDA, we cover on the call.

Message me

Darius Saraceno

Product Engineer – design, code, and product ownership in one person.