You’re all set. We got your request from LinkedIn. Maria will email you within 1 business day (US Eastern) to set up your call with Eugene. Nothing else to fill in — meanwhile, here’s how we work.
For founders & business owners
From a clear idea to a first usable release. We scope, build and develop your software, one agreed stage at a time.
Free 20–30 min call → written scope + fixed price for stage one within 2 business days. First stages start from $5k.
Maria from our team replies within 1 business day (US Eastern) to set up your call with Eugene.
Led by Eugene Tsaplin, CEO — personally Upwork Expert-Vetted (top 1% of talent), Top Rated Plus, 100% Job Success (Oct 2026).
Who this is for
You understand a problem and who the product is for. You need a technical team to test the core idea and build the first useful version.
Your team does the same work for client after client. You want a tool that does it faster, or one your clients can use on their own.
It’s live, but users find it hard to use, or changes take forever. We pick it up and keep it moving.
Not sure which one fits? That’s what the free call is for.
How the deal works
Two quotes for one app can end in very different bills. So we fix the price in writing, one stage at a time.
About your business, not about code. You talk to Eugene, our CEO.
For stage one: what we’ll build, how we’ll know it’s done, and the price. First stages start from $5k.
You see working software every week, so you always know where things stand.
Every next stage gets its own written scope and fixed price before we start. You can stop after any stage.
Keep us on as your engineering team, or on a support plan from $750/month.
Your code is yours. The code and repository live in your accounts from day one.
Stage one
You do not need an existing prototype, revenue or an in-house engineering team. Bring the problem you want to solve, who will use the product and what a useful first version should let them do.
Together we choose the first stage: testing the hardest technical assumption, connecting the core workflow, or delivering a usable release. Each stage has an agreed scope and fixed price, so the next decision is based on work you can review.
The core function your product depends on, working on your real data or documents.
That core, wrapped in a simple interface your users or your team can click through.
Like the plain-English assistant we added to a medical tech company’s dashboard.
The written scope lists what you’ll get, how we’ll check it’s done, and the fixed price. First stages start from $5k.
After launch
Launch is when real users show up and the real work starts. Keep building with us stage by stage, or keep us on a support plan.
from $750/month
Want to take it in-house later? The code is already in your accounts.
Published work
Each one is a published case study or a client’s own review.
AI product engineering
For MindSpark, Indext connected Python data collection, GPT-generated creative briefs and a Next.js dashboard. The work joined the data, AI logic and interface into a workflow for creators to discover topics and develop content ideas.
Explore the MindSpark AI case (opens in a new tab)
Medical technology · Live product
Simple questions about battery health kept going to the support team. We built an AI assistant into the existing dashboard: clinic staff ask in plain English and pull their own reports, without waiting on support.
Better oversight of thousands of assets across hundreds of locations.
Read the case (opens in a new tab)
Architecture & engineering
Teams reviewed large sets of PDF drawings manually to find specific components. We built a computer-vision pipeline that detects and classifies the symbols and turns drawings into organized lists of technical components.
Read the case (opens in a new tab)
E-commerce brand
Listing updates used to be manual. We automated them.
75% fewer manual updates — as reported by the client in their Clutch review.
Read the review on Clutch (opens in a new tab)“Their professionalism, technical prowess, and commitment to excellence make them invaluable partners.”
— Aleksandar Jankovic, CEO, TheHoneyhugs · Clutch 5.0/5
More: a multi-agent script workflow for a social content team, script-to-screen time down 70% (opens in a new tab) · All case studies (opens in a new tab)
Who you’ll talk to
CEO, Indext Data Lab
Senior architect with 20+ years in software. Your first call is with him.
On Upwork, personally: Expert-Vetted (top 1% of talent) · Top Rated Plus · 100% Job Success (Oct 2026)
COO
Emails you within 1 business day (US Eastern) to set up your call.
“Eugene and Maria are phenomenal to work with and produce high quality work!”
“They are the best at AI.”
Indext Data Lab is an engineering team based in Belgrade, Serbia, working with clients worldwide. Meet the engineers
The smallest piece that proves your product works for real users, for example the core function first, or a first version people can click through. We agree on it together on the call, and the written scope spells out what you’ll get, how we’ll check it’s done, and the fixed price.
We price one stage at a time, so you only commit to work that is fully defined. Each next stage gets its own written scope and fixed price before we start, and you can stop after any stage.
Yes. Keep building with us stage by stage, or keep us on a support plan from $750/month: issues flagged within 24 hours, fixed within 2 business days.
Every week you see working software in a short demo. Judge it by a number from your business, not by the code: hours saved, orders handled, support calls avoided.
You do. The code and repository live in your accounts from day one, so you can take it in-house anytime.
No. Bring the problem, who it’s for, and what you’ve tried. Turning that into a written scope is our job.
No. You need a budget for the stage in front of you. First stages start from $5k.
We’re based in Belgrade, Serbia. Maria replies within 1 business day, US Eastern time, and sets up your call with Eugene.
A few lines are enough. Free 20–30 min call with Eugene Tsaplin, our CEO — about your business, not about code. Within 2 business days after the call, you get a written scope and a fixed price for stage one. First stages start from $5k.
Want to add details before the call? Send a short note below.
An idea is enough to start the conversation. You do not need an existing product or investment round; we will discuss the scope and funding for the first paid stage.
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