Uplo Studio
2021 — 2025
Websites and web apps from mockup to maintenance: front end, API integrations, analytics and performance fixes.
For agencies · white-label
I build sites from Figma in Webflow and Astro.
Signed:Sergiusz RozyckiYour Agency
As your subcontractor: for a single project or on an ongoing basis, on your accounts, under an NDA if you need one.
Long-term
- Zu Agency
- Finsweet
- Uplo Studio
- Gravityoff
On projects
- Apzumi
- 300.codes
- SIDE ST
- Any Studios
- Visux
A developer on your team, under your brand
For agencies, I build sites from Figma in Webflow and Astro as a subcontractor: for a single project or on an ongoing basis.
Under your brand
The client sees the agency’s project. I don’t sign the code or the footer.
NDA, no problem
If the project needs one, I sign it before we start.
On your accounts
I work as a guest on the agency’s or the client’s accounts: Webflow, repository, Slack. Your naming, or Client-First.
What I take on
Builds from Figma, animations, integrations, fixes to someone else’s work and maintenance.
Documentation at handover
I document what I built, so your team can run the site without me.
B2B contract and invoice
Per project, or ongoing work on a block of hours.
Working with agencies since 2021
Agencies I work with on an ongoing basis as a front-end and Webflow developer, and teams I support on selected projects.
External agencies
Webflow builds and integrations for agencies that need a developer for a specific project.
Gravityoff
2022 — 2025
Webflow builds from Figma designs, and the integrations around them.
Zu Agency
2025 — today
I take projects from Figma to Webflow and own the whole front end, from CMS structure through animation to integrations. I work directly with the agency’s designers and clients.
Finsweet
2025 — today
I build Webflow projects with the team behind Client-First and Attributes, and work in large repositories where the front end meets the back end. Clean code, a scalable structure and detail matter here, for clients around the world.
A word from the people I work with
01 / 08
I worked with Sergiusz during my time as Marketing Director at Quatt. He is a rare kind of developer: technically strong, proactive, and always thinking beyond the brief. Sergiusz brought valuable ideas to the table, adapted quickly as priorities changed, and played an important role in improving the Quatt website. He combines flexibility with real ownership, making him a highly reliable partner in a fast-moving environment. I would highly recommend Sergiusz to any team looking for a skilled and proactive developer.
Frank AbrahamsMarketing Director, QuattLinkedIn Best guy to work with, super responsive, smart in finding solutions and always thinks about the customer first. Love it, rooting for Sergiusz, 100% recommendation!
Vince Wagenknecht Marketing Attribution for AG1LinkedIn Sergiusz is a great specialist, and it was a real pleasure to work with him, among other things on migrating a large, complex website from WordPress to Webflow. From the very start he proved extremely responsible, meticulous and precise. Over several years of working together I watched his tremendous professional growth first-hand — especially his ever-growing knowledge and the maturity and quality of his JavaScript code, which was key to our migration. Sergiusz’s greatest strength is that he isn’t afraid of even the most complex challenges. Whatever technical difficulties or time pressure came up along the way, he always delivered his tasks by the agreed deadline. Working with him is a pure pleasure and a real comfort on any project. I sincerely recommend working with Sergiusz and very much hope we’ll take on many more successful initiatives together!
Michał MaderaWeb developer · WordPress → Webflow migrationLinkedIn Sergiusz supported me many times on Webflow-based projects. He coordinated them from start to finish. He helped gather requirements and prepare estimates, then took end-to-end ownership of implementation, testing, addressing client feedback, solving day-to-day issues and launch. Working together was smooth and professional, and always focused on a good collaboration and the final value for the client, which I especially appreciate.
Joanna Kasprzak, PhDIT Delivery Manager · digital healthLinkedIn Working with Sergiusz, I felt I wasn't dealing with a subcontractor but with a business partner who understood what I needed and knew exactly how to deliver it.
An outstanding specialist in modern web design and development.
To the point, reliable and always on time. Never wastes time, yet always takes the time to explain things and find the best solution.
I recommend Sergiusz to anyone who values high quality and respect for their time.
Piotr KalewskiCEO Event Marketing InstituteLinkedIn Sergiusz is a true professional, a great developer, and a wonderful person to work with. I really enjoyed working with him and would highly recommend him to anyone!
Maor OfekFounder, SIDE ST®LinkedIn We worked together from the very beginning of the project, when we first started migrating our website to Webflow. One of the biggest challenges was translating the entire design system into solutions that not only look good but also function smoothly and are easy to scale. He handled this exceptionally well. He brought our UX/UI designs to life with great attention to detail, ensuring responsiveness and consistency across all website elements.
I really appreciated that we could always count on him whenever technical issues or questions arose. He was our go-to person for help. He has a deep understanding of Webflow, can quickly diagnose a problem and find a solution, all while clearly explaining what should be done and why a particular approach is best.
It was also important to me that he understood the needs of our design team. He didn't approach tasks purely from a technical standpoint. He proactively offered advice, suggested alternative approaches, and pointed out things we might have otherwise missed during the design phase.
Working with him was a great experience. He is a truly skilled Webflow developer who knows his tools, cares deeply about the quality of his work, and can always be relied upon. I happily recommend him to anyone looking for a proven specialist for their Webflow projects.
Seweryn KłusakProduct Design Owner at ShoperLinkedIn I recommend Sergiusz for Webflow projects. He’s a very skilled professional, and he’s also responsive and communicative. Our collaboration went very smoothly, despite the project’s high level of complexity.
Jędrzej ZarychtaFractional CMO | Growth & E-commerceLinkedIn
Questions agencies ask
Which language and time zone do you work in?
Polish and English, from Warsaw (CET). I’ve worked with agencies’ clients around the world.
Do you build on Client-First?
Yes, every day, including with the Finsweet team that created it. If you have your own convention, I follow yours.
Only Webflow, or Astro too?
Both. When a project needs its own content structure, several languages or integrations, I build in Astro with Sanity.
How do you quote?
After a short call you get the scope, schedule and quote in writing: per project or as a block of hours. I work on a B2B contract and invoice.
Will you take over a project mid-way or after another developer?
Yes, if it’s in Webflow or Astro. I start with a review of its technical state and tell you what to fix first.
Let’s talk about your project
Planning a Figma build, an upgrade of your current site or an integration with other systems? Briefly describe what you need and I’ll reply within 24 hours.
approx. 2 min