Senior delivery without the salary
Add experienced build capacity when projects land, without carrying a full-time developer through quiet months.
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 MarjanovicDigital strategist & creative director



Three outcomes I hold myself to before anything ships. If these are not the job, this is the wrong page.
Add experienced build capacity when projects land, without carrying a full-time developer through quiet months.
I work behind your agency, follow your communication model, and keep client ownership where it belongs.
Repository, hosting, documentation, and credentials stay under your control. No mystery codebase and no forced dependency.
Scope first, so you know what you are buying and what stays out.
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.
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.
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.
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.
Same order every time. Discovery, the plan, the build, then the check after launch.
Send the brief, designs, repo, and deadline. I identify missing decisions, delivery risk, and the smallest useful first milestone.
Risk notes and delivery scope
We start with a real component, integration, or technical slice so you can judge communication and code on actual work.
Working code in your repository
I ship against agreed milestones, document decisions, and flag scope changes before they surprise the agency or client.
Reviewable production increments
Deployment, smoke tests, documentation, and ownership transfer are finished before the engagement closes.
Live product and clean handoff
Every review is public and verifiable on
The artifacts you keep after the call, the build, or the audit.
A build sequence with assumptions, risks, and ownership clear before the first sprint.
Production code delivered under your agency's process and brand.
Sanity, Supabase, Stripe, APIs, webhooks, and the operational details that make the build usable.
Metadata, canonicals, redirects, structured data, and indexation handled during builds and migrations.
Responsive checks, production smoke tests, and fixes when real traffic reaches the work.
Your team keeps the code, infrastructure access, and enough context to operate it after delivery.
Practical guides for evaluating the problem, the scope, and the person you hire.
The ownership, pricing, delivery, and trial-task checks that protect your client relationship.
When flexible overflow capacity is a better commercial decision than another permanent salary.
Where automated testing helps delivery and where senior judgment still has to own the risk.
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.
Same person, same commercial standard. Different entry point.
Most teams do not need another workshop deck. They need a digital strategist who can say what the site is for, what to build first, and what can wait. I do digital strategy consulting that stays connected to design and website development, so the plan does not die in a PDF.
A redesign fails when it starts in Figma. Website redesign services should start with website strategy, the pages that create pipeline, then website design and website development. I run that sequence so a custom website redesign does not erase the rankings you already have.
I work as an SEO consultant on the parts that actually move a site: crawlability, indexation, site architecture, schema, page quality, and the SEO risk inside a website redesign. SEO consulting services here are technical and implementation-heavy. If you need 40 blog posts a month, that is a different hire.
CRO is not a heatmap subscription. If the offer is unclear, the page asks for the wrong action, or the website redesign never defined a job for each URL, tests will not save it. Conversion rate optimization consulting starts with the offer and the page job, then I change the page.
Most AI applications stall after the prototype. You need someone who can take the idea from prompt to production: structured outputs, auth, billing, logging, cost controls, and a codebase your team can maintain. I build AI products that ship.