For web agencies
White-label development under your name: your tracker, your repository, your pipeline.
Logbook · selected entries
I build and run WordPress, WooCommerce and TYPO3 sites, usually as the only developer on them.
I work for web agencies, white-label under their name, and directly for companies. You get one developer from the design file to the server. Nothing goes live until you've clicked it through on staging.
Since 2018
130+projects
Shops, corporate sites, web apps and a mobile app.
Direct & agencies 65+clients
Web agencies, a studio, and companies directly.
Europe · Israel · USA 13countries
Germany, Israel, the UK, Switzerland, the USA and more.
Upwork profile
100% Job Success
5.0 client rating
5,000+ hours billed
TopRated on Upwork today
02 — Services
What I do.
WordPress & WooCommerce
Custom themes from Figma, Gutenberg blocks, shops and multilingual sites. Your team can edit them without me.
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.
Taking over a site or app
Your developer left, or nobody wants to touch the code any more. I read it, make it stable and keep it moving.
TYPO3 & Neos front end
Relaunches and content elements on TYPO3 and Neos. I build to the design, check every page against the old site and ship through your team's pipeline.
Landing pages, campaigns & e-mail
Campaign pages that are live when the ads start, and lead forms that reach you. Plus HTML e-mails that look right in the main mail clients.
Support & maintenance
Updates, fixes and small features on sites that earn money every day. Before any change I make a backup and a copy, and after it you get a short note of what changed.
Speed, security & accessibility
I check this on every site I build. And I take it as a separate job when a site is slow, was hacked or has to meet the BFSG.
I also took over a React Native app and kept it shipping: 8 App Store releases.
03 — Selected work
Some of my work.
- eToro
- eToroX
- Alliance virtual museum
- MDN Group
- Auto3P
- ExpertSure
- Ecopreneurist
- Nameica
- CGSpark
- Waterproof Web Wizard
- Everthinkers
- Cloud Inspire
- Nash Radway
eToro and eToroX: the exchange website, campaign pages and web apps
I was the main developer of the eToroX exchange website, then built eToro's campaign pages, web apps and part of the Digital Assets site, over three and a half years.
Alliance virtual museum: taking over and growing a 3D web museum
I took over a 3D web museum in three languages from an earlier team and led it through two versions: links to every exhibit, new halls, a floor map, lighter media.
A cosmetics shop rebuilt from scratch after the old one went dark
The brand's hosted store went offline. I rebuilt the shop on WooCommerce with a German-law checkout and brought back its old links and reviews.
ExpertSure & Ecopreneurist: WordPress sites, plugins and a store
Since 2023 I've been the developer of a UK publisher's comparison sites: merged installs, custom plugins, fixes and a domain store.
04 — How I work
How a job goes.
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Look first
Before I quote, I open the site, the code or the design. For a site I don't know yet, that's a Site check: €100, and it counts toward the work.
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Agree the scope
Before I start, I write back how I understood the task, in my own words, and ask: right? Then we agree what's in, what's out and the price. If it turns out bigger, you hear it from me before I go further.
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Build on staging
You click through a working copy. Production changes only when you say so.
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Stay after launch
Clients stay for years, one since 2018. The next fix or feature goes to someone who already knows the code.
Jobs start at €100. A landing page from €400, a site or a shop from €800.
See prices →05 — Reviews
What clients say.
We greatly enjoyed working with Serhii and look forward to continuing our collaboration with you. I can only speak positively about him. Serhii was consistently an outstanding programmer. He always went at least one or two steps further to achieve an even better result, without making mistakes. He was extremely eager to learn and solution-oriented. I can recommend him without reservation and with the utmost enthusiasm - the strongest recommendation I would ever give.
As Managing Director of Waterproof Web Wizard GmbH, I work closely with Serhii and recommend him without reservation. He develops for us in WordPress and TYPO3, from customizations to fully custom extensions. He also delivers projects in Neos CMS and takes care of our server maintenance. What I value most is how precisely he turns screen designs into working websites. He thinks along technically, works in a structured way and finds clean solutions even for tricky requirements. If you are looking for a versatile developer with a strong eye for quality, Serhii is a great choice.
Serhii is a great developer and team player. He and I worked on several projects in the past few years, working with Serhii was a great pleasure, he is solution oriented, motivated and a true partner in a crisis. Serhii will be a great asset to any project or team
Really great developer, can handle any task we give him. Nice eye for detail, we use Serhii for all our development work for ecoprenurist and expertsure
Sergey is consistent and a very thorough developer, he's a team player that isn't afraid to handle new challenges
Sergey is a real professional and did an excellent job. He gave really good advice, tested everything to make sure it works and even made instructional videos to show me how to manage the website content on WordPress.
Sergey is a wizard!!! Very professional and a pleasure to work with. Will definitely hire for any website related needs in the future
Sergey did great job! He was generous, patient, knowledgeable. Looking forward to working with him again. Highly recommended!
It was a pleasure to work with Sergey again, project was done quickly and with high precision. Sergey it was great working with you as always!!!
Great working with Sergey. Very organised, structured and detailed.
Very professional and nice to communicate and work with
Upwork 2023–2024
We greatly enjoyed working with Serhii and look forward to continuing our collaboration with you. I can only speak positively about him. Serhii was consistently an outstanding programmer. He always went at least one or two steps further to achieve an even better result, without making mistakes. He was extremely eager to learn and solution-oriented. I can recommend him without reservation and with the utmost enthusiasm - the strongest recommendation I would ever give.
LinkedIn 2026
As Managing Director of Waterproof Web Wizard GmbH, I work closely with Serhii and recommend him without reservation. He develops for us in WordPress and TYPO3, from customizations to fully custom extensions. He also delivers projects in Neos CMS and takes care of our server maintenance. What I value most is how precisely he turns screen designs into working websites. He thinks along technically, works in a structured way and finds clean solutions even for tricky requirements. If you are looking for a versatile developer with a strong eye for quality, Serhii is a great choice.
Upwork · 3,387 hours 2019–2021
Serhii is a great developer and team player. He and I worked on several projects in the past few years, working with Serhii was a great pleasure, he is solution oriented, motivated and a true partner in a crisis. Serhii will be a great asset to any project or team
Upwork 2023–2024
Really great developer, can handle any task we give him. Nice eye for detail, we use Serhii for all our development work for ecoprenurist and expertsure
Upwork 2026
Sergey is consistent and a very thorough developer, he's a team player that isn't afraid to handle new challenges
Upwork 2019
Sergey is a real professional and did an excellent job. He gave really good advice, tested everything to make sure it works and even made instructional videos to show me how to manage the website content on WordPress.
Upwork 2019
Sergey is a wizard!!! Very professional and a pleasure to work with. Will definitely hire for any website related needs in the future
Upwork 2019
Sergey did great job! He was generous, patient, knowledgeable. Looking forward to working with him again. Highly recommended!
Upwork 2019
It was a pleasure to work with Sergey again, project was done quickly and with high precision. Sergey it was great working with you as always!!!
Upwork 2019
Great working with Sergey. Very organised, structured and detailed.
Upwork 2018
Very professional and nice to communicate and work with
06 — Tools & notes
Things I made and wrote.
Deviation Calculator
Magnetic compass deviation from eight headings: A/B/C/D/E coefficients, the curve and a record.
07 — Contact
Tell me what you need.
Use the form or message me on LinkedIn.
Already working with me on Upwork? Write there.