White-label web development

White-label web development for agencies that need senior delivery without another full-time hire.

Your client signed, the internal bench is full, and the deadline did not move. I handle white-label website and product delivery under your agency's brand, with clear ownership, direct senior communication, and code your team can keep.

80+ five-star reviews · 100% Upwork Job Success · 120+ projects

Zlatko Marjanovic, white-label web development consultantZlatko MarjanovicDigital strategist & creative director
Brand Collaborations
Common Crawl
Stitch3D
Dynamite Garage
Vault Apps
Dana Yao
Entrepreneurs for Global Change
Common Crawl
Stitch3D
Dynamite Garage
Vault Apps
Dana Yao
Entrepreneurs for Global Change
7+Years shipping client work
120+Projects across web and product
80+Five-star reviews across platforms
100%Upwork job success score
What you get

What changes when this is done right.

Three outcomes I hold myself to before anything ships. If these are not the job, this is the wrong page.

01

Senior delivery without the salary

Add experienced build capacity when projects land, without carrying a full-time developer through quiet months.

02

Your brand stays in front

I work behind your agency, follow your communication model, and keep client ownership where it belongs.

03

A clean handoff

Repository, hosting, documentation, and credentials stay under your control. No mystery codebase and no forced dependency.

The engagement

What this work actually covers.

Scope first, so you know what you are buying and what stays out.

What white-label web development means here

I build websites, SaaS features, and AI applications under your agency's brand. You keep the client relationship. I own the technical delivery, communicate clearly, and surface risks before they become awkward client calls.

What I can take over

Next.js and React builds, Webflow delivery, Sanity or Supabase architecture, Stripe integrations, technical SEO, migrations, and productionizing AI-built apps. I can own a complete build or the part blocking your internal team.

Who this is for

Web, design, SEO, and marketing agencies with uneven development demand. This works best when you need one senior operator who can join quickly, understand the brief, and ship without constant hand-holding.

How ownership works

The repository, hosting, domains, and production credentials can live in your accounts from day one. Scope changes are documented before work expands. The client never gets trapped because the delivery partner controls the infrastructure.

How it works

A sequence, not a scramble.

Same order every time. Discovery, the plan, the build, then the check after launch.

  1. Private scope review

    Send the brief, designs, repo, and deadline. I identify missing decisions, delivery risk, and the smallest useful first milestone.

    Day 1

    Risk notes and delivery scope

  2. Paid trial or first sprint

    We start with a real component, integration, or technical slice so you can judge communication and code on actual work.

    Days 2-5

    Working code in your repository

  3. Build and weekly delivery

    I ship against agreed milestones, document decisions, and flag scope changes before they surprise the agency or client.

    Weekly

    Reviewable production increments

  4. Launch and handoff

    Deployment, smoke tests, documentation, and ownership transfer are finished before the engagement closes.

    Final sprint

    Live product and clean handoff

What the people
have to say

Every review is public and verifiable on

FiverrUpworkContraLinkedInFiverrUpworkContraLinkedInFiverrUpworkContraLinkedIn

Zlatko is a PRO! Something I was struggling with for months, took him only a few days. I think I it wasn't for the Christmas holidays, he probably could have completed it with me during our consultation call. He knows how to operate the back end of a website, he understands coding and connection. He is just a life saver and has saved me valuable time. I'll 100% will be working with him as I continue to build my tech business. I recommend him, but be easy on him. I still need him to be available to help me. You can't lose when working with Zlatko! He's excellent!

Meesha Lewis testimonial for Zlatko Marjanovic
Meesha Lewis
CEO & Founder at ManeXperience

Working with Zlatko has been nothing but exceptional. From the speed of his work to his deep knowledge of code, the entire process was a pleasure, and I'm very happy with my improved website. Zlatko was responsive, knowledgeable, and willing to go back and forth with me on even the smallest details. He also sent a very detailed video addressing all of my questions and concerns, which I can refer back to for any future updates. I'm very glad I chose Zlatko and would highly recommend him.

Minka Djurasevic testimonial for Zlatko Marjanovic
Minka Djurasevic
Senior Graphic Designer

Great experience working with Zlatko! He did a great job creating our press sites and delivered a professional, well-structured result that matched what we needed. Communication was smooth throughout the project. Highly recommended and we would happily work with him again!

Hintsteiner Group testimonial for Zlatko Marjanovic
Hintsteiner Group GmbH
Austria

Very happy with the project and Zlatko's work. I didn't think it was possible but he took my site from a 43 to a 96 score on Lighthouse for page speed and load times. Will definitely be a repeat customer.

Lance Parth testimonial for Zlatko Marjanovic
Lance Parth
Triton Sensors

Zlatko did a very good job making a new website for my clinic. It looks very professional and streamlined, and I am looking forward to optimizing it for SEO performance. There was a little bit of delay due to some unforeseen issues on his end, but he was communicative and let me know what's going on. I would definitely use him again in the future if needed.

Dr. Farhan Abdullah testimonial for Zlatko Marjanovic
Dr. Farhan Abdullah
CEO at Magnolia Functional Wellness

Zlatko did excellent work on my site. He significantly improved PageSpeed performance, rebuilt a problematic popup natively, and refined the mobile experience so the site is now much smoother and easier to navigate. Communication was clear and professional throughout, and he was thoughtful in addressing both technical performance and real user experience.

Sagel testimonial for Zlatko Marjanovic
Sagel
Yoga and Meditation with Sagel

Zlatko is the real deal. A REAL web developer who builds professional components, structure, and websites. He absolutely knows what he's doing and is the most professional web builder I've worked with on this platform. I will 100% hire him again and again. He's my go-to guy now. Absolutely knocked it out of the park on an insane deadline with a heavily animated and polished build.

Adam testimonial for Zlatko Marjanovic
Adam
Polyform Studio

The best web developer you could ever ask for, he did an amazing job with our website and we will be working with him in the future for more projects. We are extremely satisfied with his work and the end result. Highly recommend you Zlatko for any high end website needs.

Alexander Karima testimonial for Zlatko Marjanovic
Alexander Karima
Co-founder at Mavesta Media

Zlatko did such an amazing job fixing up my site. He is always fast and responsive and delivers high-quality work. Will definitely come back again. Highly recommend.

Dana Yao testimonial for Zlatko Marjanovic
Dana Yao
Senior Product Designer at Visa Inc.

Zlatko is very experienced, able to communicate clearly and efficiently and able to work very fast while still delivering quality work. He's an amazing web designer and I will definitely be back for future work and refer close friends to his offer.

Astral Labs testimonial for Zlatko Marjanovic
Astral Labs Agency
Independent Employer

Zlatko has been a pleasure to work with. He is extremely professional, proficient and articulate. He met our tight deadline and was incredibly patient with our changes. Looking forward to working with him in the future.

Matthew John S testimonial for Zlatko Marjanovic
Matthew John S
CEO at Gsshades

Zlatko exceeded in every possible way. Excellent communicator, very speedy in response and proactively thinking with me to get the most out of my website and setup. He is a gem!

Desiree Kolman testimonial for Zlatko Marjanovic
Desiree Kolman
Personal Website Build

Zlatko was extraordinarily ADEPT, EFFICIENT and provided amazingly high quality in his work. Would HIGHLY recommend him!

Nick Maciel testimonial for Zlatko Marjanovic
Nick Maciel
Founder at Cadversity

Zlatko is hard-working and proactive, with excellent communication skills and a keen eye for detail. We engaged Zlatko to help with a broad range of tasks with quite a short turnaround, and we couldn't be happier with his results. I highly recommend his services and would not hesitate to work with him again in the future.

Thom Vaughan, Manager at Common Crawl, review for Zlatko Marjanovic
Thom Vaughan
Manager at Common Crawl

Zlatko was incredible to work with, he helped spin up our website in less than two days and responded within minutes to all of my requests. Can't thank him enough, will use him again for many other projects moving forward. My second time working with him in 2 weeks and he's completely exceeded expectations yet again.

Marina Paganessi testimonial for Zlatko Marjanovic
Marina Paganessi
Co-Founder at Focus&Film

Zlatko was a dream to work with and we would 100% work with him again!

Dominique De Leon testimonial for Zlatko Marjanovic
Dominique De Leon
Independent Employer

Great job. Did a comprehensive overhaul of our entire site and got us to move off SquareSpace. Very collaborative and consultative, which was very helpful.

Seth Meritt, CEO at Welby Health, review for Zlatko Marjanovic
Seth Meritt
CEO at Welby Health

Zlatko is a true pro. His knowledge of web development is tremendous, and he is very committed to ensuring everything works to your satisfaction before delivery. I will continue to be using Zlatko for any updates to my website, and cannot recommend his services enough!

Zach Garti testimonial for Zlatko Marjanovic
Zach Garti
Founder of Pareidolia

Our website allows us to deliver our vision, impact, and connect with our existing and future community around the world. Thanks to Zlatko's skillsets and laser-focused diligence, it speaks to our audience, inspires others to take action, and transmits the energy of our work with young founders.

Filip Sasic, CEO and Founder at EGC, testimonial for Zlatko Marjanovic
Filip Sasic
CEO & Founder at EGC

I had the pleasure of working with Z on a project, and I couldn't be more impressed with the results. His communication is exceptional, clear, prompt, and always professional. Z truly understands client needs and goes above and beyond to ensure satisfaction. I look forward to collaborating with him on future projects.

Jordan W. Bryant, Chair and CEO Vault Apps, testimonial for Zlatko Marjanovic
Jordan W. Bryant
Chair & CEO, Vault Apps

Zlatko was incredible. He worked diligently under a deadline, gave incredible insights and was able to work on his own and bring massive value to the project. It was a pleasure working with him on this project and will be working with him again in the future. Best web person I've worked with on this platform, by far.

Marshall Wilkinson testimonial for Zlatko Marjanovic
Marshall Wilkinson
CEO, Construct

He did a great job and completed the website very quickly. Excellent designer and good communicator.

Jeremy Brown, CEO at Karihub, testimonial for Zlatko Marjanovic
Jeremy Brown
CEO at Karihub
What is included

What lands on your side.

The artifacts you keep after the call, the build, or the audit.

Technical scope and estimates

A build sequence with assumptions, risks, and ownership clear before the first sprint.

White-label implementation

Production code delivered under your agency's process and brand.

CMS and product integrations

Sanity, Supabase, Stripe, APIs, webhooks, and the operational details that make the build usable.

Technical SEO protection

Metadata, canonicals, redirects, structured data, and indexation handled during builds and migrations.

QA and launch support

Responsive checks, production smoke tests, and fixes when real traffic reaches the work.

Repository and handoff documentation

Your team keeps the code, infrastructure access, and enough context to operate it after delivery.

Before we start

Questions about this work.

Short answers so you can tell if this is the right engagement.

White-label web development means I deliver websites or product work behind your agency's brand. You own the client relationship while I handle the agreed technical scope.

Only if you want me to. I can stay fully behind the scenes or join technical calls as part of your team.

You or your client. The repository and hosting can live in your accounts from day one, with credentials and documentation handed over at launch.

Yes. A small paid task on real work is the best way to test communication, code quality, and fit before committing a client project.

Next.js, React, TypeScript, Webflow, Framer, Sanity, Supabase, PostgreSQL, Stripe, Vercel, and API or AI integrations.

Yes. White-label and confidential delivery can be covered by your NDA and communication rules.

Yes. I read the architecture first, identify the risky areas, and start with the smallest useful fix before proposing a rewrite.

Both. Some agencies use me for one difficult build. Others keep a small monthly allocation for overflow, production issues, and weekly shipping.

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