SerhiiNadolskyi
Hire me

Service

Web apps & headless builds

React, Next.js and Node.js, for jobs bigger than a CMS: a 3D web museum, or an exchange's marketing site that builds its own pages from an API.

Some jobs are bigger than a CMS. I was the main developer of a crypto exchange’s marketing site, fed by its trading API, and of a 3D virtual museum. I built a Hebrew real-estate site on Next.js and headless Strapi. For a web agency I built a tool that scans sites for hidden spam.

What I build

  • React and Next.js front ends. Static where it can be, server-rendered where it must be. Right to left for Hebrew.
  • Node.js and PHP back ends. APIs, page builders, importers, admin consoles, scheduled jobs.
  • Headless CMS setups. Strapi or WordPress for the editors, a fast front end for the visitors.
  • Internal tools. The report or the check your team still does by hand today.

How it goes

I start with the smallest version that proves the idea on real data. You see it working, and we grow it from there. At every step you get a build you can open and click through.

Result

What you get

  1. Pages that build themselves

    Content comes from your API or headless CMS. When you add a new product or listing, it shows up on the site without a developer.

  2. A front end that stays fast

    Media pipelines, lazy loading and static rendering where they help. I measure before and after.

  3. Production you can hand over

    AWS, Docker or a plain VPS. I deploy and look after it, and I don't leave you a stack nobody else can run.

In practice

Where I did this: 10 clients

All 10 →

FAQ

What clients ask me

Which stacks do you work in?

React, Next.js, TypeScript, Three.js and Angular on the front. Node.js (Express, NestJS), PHP and Python (FastAPI) on the back. MySQL, PostgreSQL and MongoDB. Headless Strapi and WordPress as a CMS. AWS: EC2, S3, RDS, Amplify.

Mobile too?

Yes, React Native with Expo. I took over a community app and kept it shipping: eight App Store releases.

From scratch, or on an existing codebase?

Both. Many of my projects started as someone else's code. I read it first and keep what works. I change only what blocks the next release.

Jobs start at €100. For a site I don't know yet, a Site check is €100, and it counts toward the work.

See prices →

Contact

Tell me what you need.

Use the form or message me on LinkedIn.

Already working with me on Upwork? Write there.