Your go-to product partner
We deliver the finished outcome: scope, design, build, launch, and ongoing support, from the first idea to scale.
We build the systems your business runs on
We design and build applications people use every day, automations that take manual work off your team, and websites that bring in clients. One senior team, your go-to product partner.
What drives us
Speed stopped being the advantage. Building a product used to take a year and cost a fortune. AI ended that era for everyone. The advantage now belongs to whoever ships the right thing first: validated, well built, and still working a year later. We exist to make sure it's you.
Services
Application
Custom products your team or customers use every day - from first version to something that can scale. You own the code.
- UI/UX Design
- Product strategy
- Architecture
- Development
- AI engineering
Automation
Workflows and AI assistants that cut manual work in CRM, ops, and client delivery - without replacing your judgment.
- Process mapping
- n8n
- CRM
- AI assistants
- Integrations
Website
Marketing and product sites with a clear offer, strong craft, and a path from visit to booked call or signup.
- UI/UX Design
- SEO & AEO
- Development
- CRO
- Copy
Operations programs
A monthly AI automation partnership
Freight Operations
Automations around your TMS - documents, status, exceptions, and the handoffs your TMS doesn't cover.
See the programLegal Operations
Intake, documents, deadlines, and client updates - AI prepares the file, the lawyer decides.
See the programAccounting Operations
Missing documents, exceptions, and deadlines around your accounting software. AI prepares, the accountant decides.
See the programWhy Eterna
What you get when we work together
See how we work before you commit
A free 30-minute strategy call, then a free Blueprint: what we build, what it costs, and when it ships. If we're not the right match, we'll say so.
We build and run our own products
We build and co-found products of our own, including ProSafeNet, StretchWell, Zonik AI, and TestAImodels, and hold them to the same production bar as client work.
Premium design on every product
Apps, websites, and internal tools are designed, not just built. UI and UX design are part of the work.
Senior people, no relay
Marko and a small senior team. You talk to the people who ship, with no junior bench and no account-manager relay.
AI that holds up in production
A check on the answer, a known cost, a fallback when it misses, and senior review before anything ships.
Case studies
Products we've launched
Trust
Proof up front, a guarantee behind it
Go-Live Guarantee
If your first build isn't live by the agreed date for reasons on our side, we keep working at no extra cost until it is.
See the programs5 stars on Clutch, the B2B reviews platform. The reviews are public: read them before we talk.
Read the reviews
Book a free 30-minute strategy call
A direct conversation with Marko about fit, scope and the next step, with no sales pitch. If we're not the right match, we'll say so.
- 30 minutes
- Direct with founder
- Free, no commitment
Go slow on scope so the build is fast
For apps and automations, a Blueprint: what we build, what it costs, when it ships. For smaller website jobs, we can often scope on the call.
- Scope
- Flat price
- Timeline
Senior team. AI on the critical path.
Senior engineers on the repo, senior review before it ships. Weekly progress. No account-manager relay between you and the build.
- Senior only
- Weekly updates
- Clear ownership
Go live - then keep building it
QA, handoff, and docs included. Launch is the start of running the product with you - iterations and growth.
- QA & handoff
- Monitoring
- Long-term partner
Client stories
What clients say after we ship
Overall, the team has performed betterthan any other projectI've worked on in the IT industry.
150+ verified professionals in the first 60 days
Clutch review
Radu Antohe
Founder, PublicLink
PublicLink
Stefanie Herbert
Co-founder, Relative Innovations
“Working with Marko has been an incredible experience from start to finish. He went above and beyond to bring our vision for our CRM platform to life not only executing what we asked for, but also offering valuable suggestions that improved the overall design and functionality.”
A custom CRM platform, built end to end
Dr. Vladimir Cvetkovic
Founder, ProSafeNet - a product we co-founded
“1000 users in first 3 months, 20% conversion rate, 2 official sponsors inside first 2 months.”
1,000 users in the first 3 months
Ivica Veljkovic
Founder, PetGo Buddy
“They were responsive, open to collaboration, and consistently focused on finding the best ways to shape the product.”
A pet-sitting booking app
Tania Espinoza
Founder & CEO, Global 8 Connect
“Working with Marko at Eterna on the development of my B2B platform has been an exceptional experience. Communication was outstanding from day one; they were always highly attentive to details and proactive. Despite a significant time zone difference, they were incredibly responsive, consistently answering questions and resolving doubts in less than 24 hours.”
An MVP launched across time zones
Stefan Petricevic
Founder, FacelessStar
“Weekly Loom updates helped me to always know where things stood without chasing anyone, also with Notion portal was a game changer - all decisions, files, tasks in one place. These guys have good processes”
An AI content tool, delivered with weekly updates
Boban Miljkovic
CEO, Tap Group
“I'm not into apps, but we needed solution as we were constantly dealing with missing inventory and couldn't track who sold or bought what. The TapAPP Marko made solved it easily and our inventory management is at least 50% faster now.”
Inventory management at least 50% faster
Miloš Djordjevic
Founder & CEO, Stretch Well - a product we co-founded
“This platform lets us help the thousands of followers who couldn't access our stretching services before - with our own app. The whole process was cool, and the team solved all the technical challenges we worried about, especially around video security.”
A stretching app with secure video
Ksenija Jovanovic
Founder, Slikaj sa psima
“I was losing track of bookings and constantly dealing with confusion about who was coming when. The new system handles everything automatically - so no more papers and chaos around me. Big thanks to Eterna team for being there the whole process.”
Bookings now handled automatically
Start here
Where are you stuck right now?
I have a product idea
Validate it, scope it, and ship a first version people can use - without burning months on the wrong build.
Book free strategy callI want to migrate
Move a no/low-code app or an AI-built prototype onto something stable you own, or tighten what you already have.
See how rescue worksI want to speed up
Automate the busywork in sales, ops, or client delivery - so your team stops living in inboxes and spreadsheets.
See business automationI need more clients
A website with a clear offer and one next step on every page, so visits turn into calls.
See websitesCompare
Four ways to get it built
Each fits a different job. Here is how they compare, so you can pick the right one, even when it isn't us.
| What matters | Eterna Creative | Hire in-house | A freelancer | Off-the-shelf software |
|---|---|---|---|---|
| Best for | A finished app, automation or website, with checks and upkeep | Continuous, full-time software work | One contained job you review yourself | A common process the tool already covers |
| What you manage | Decisions and approvals. We manage delivery | Hiring and a full-time role | Scope, quality and every decision | Setup and the workarounds |
| Who fixes it in month seven | We do, with maintenance or a program | Your employee, if still with you | The freelancer, if still available | The vendor, not your process |
| How you pay | A fixed price, or a program from €800/mo | A salary, every month | Hourly or per project | A subscription that grows with use |
| What you own | The code, workflows, accounts and docs | Everything they build | What your contract says | Your data, inside their product |
| Watch out for | We'll say if another option fits better | Work that doesn't fill the week | No second person to review the work | Your process bending to the tool |
About us
Marko
Founder, Eterna Creative
Artur
Lead engineer
Violeta
Marketing director
You talk to the people who ship.
Marko and a small senior team. No junior bench, no account-manager relay. If we can't resource your project properly, we'll tell you upfront. Remote team, HQ in Serbia.
20+
apps shipped
30+
automations shipped
5
on Clutch and Upwork
15+
websites shipped
“The best products aren't built by the biggest teams or the deepest pockets. They're built by people who validate before they code, ship a small version early, and improve it faster than anyone else can react.”
Marko Milojković
Founder, Eterna Creative
How we use AI
AI that holds up live
Every build with AI follows the same rules, on client work and on the products we run ourselves.
Every AI answer gets checked
We check AI output against real examples from your work, and test that the guardrails hold before anything ships.
A fallback when it misses
When a model is down or unsure, the system takes a simpler path or hands the task to a person.
Costs you know up front
We track what every AI call costs, set spending limits, and add a switch to stop runaway usage.
An alert when work stops
For anything that runs on its own, a named person hears when expected work doesn't happen, not only when something fails.
Tested on our own product
Zonik AI, a logistics product we co-founded, runs two models on the rate confirmations its users upload. Any field where they disagree goes to the dispatcher to confirm.
Senior review before it shipsCheck on the answerKnown costSenior review before it shipsCheck on the answerKnown costSenior review before it shipsCheck on the answerKnown costSenior review before it shipsCheck on the answerKnown cost
Fallback when it missesClaude on the critical pathWe build and co-found AI productsWorkflows in your productFallback when it missesClaude on the critical pathWe build and co-found AI productsWorkflows in your productFallback when it missesClaude on the critical pathWe build and co-found AI productsWorkflows in your productFallback when it missesClaude on the critical pathWe build and co-found AI productsWorkflows in your product
Research and scope draftsQA assistAI-assisted custom codeProduction bar, not a demoResearch and scope draftsQA assistAI-assisted custom codeProduction bar, not a demoResearch and scope draftsQA assistAI-assisted custom codeProduction bar, not a demoResearch and scope draftsQA assistAI-assisted custom codeProduction bar, not a demo
Stack
Lean engineering for your product's actual stage
No-code, low-code or AI-assisted custom code, chosen per product. These are the tools we build with.
Resources