Two senior engineers. No layers.
Nexera AI is a founder-led, AI-native software studio registered in Ukraine. Our two co-founders are senior full-stack developers with 12+ years each. AI agents write most of the code against written specs and tests, and one of us reviews every change. You talk to the people who build your product, from the first call.
Nexera stands for the next era of AI development
Software development has shifted. AI agents now write most of the code, and the engineer's job is to decide what gets built, write it down as a spec and check every change before it ships. This is developer in the loop, and it is what Nexera AI is built around.
We worked with AI long before the hype and before ChatGPT appeared. Our founders started with machine learning, then used the first AI code helpers as soon as they came out, and kept adapting the way we work to each new generation of tools.
Today we run an army of AI agents on every project, writing code, tests and documentation in parallel. A senior engineer steers them and reviews every merge. That is how we build products faster, more reliably and at a lower cost than a traditional team.
Who you work with
No account managers and no hand-offs. When a project needs more hands, we bring in vetted senior engineers from our network.
Stanislav Cheslavskyi
Co-founder & CEO. Runs discovery, scoping and delivery, so you always have one clear point of contact. Also writes production code. 12+ years as a full-stack developer. Stanislav Cheslavskyi on LinkedIn (opens in a new tab)
Oleh Leskiv
Co-founder & CTO. Owns the architecture, the agent loop and code review. No AI-written change merges without a senior read. Also writes production code. 12+ years as a full-stack developer. Oleh Leskiv on LinkedIn (opens in a new tab)
Vetted senior engineers
A small network of senior engineers we have worked with, brought in only when a project needs more capacity. They follow the same specs, tests and review gates.
AI does the heavy lifting, a senior engineer signs off
Every feature starts as written Product Requirements, becomes a spec, ships with automated tests and passes only when it meets agreed acceptance criteria. A senior developer reviews every merge before it reaches your main branch.
That is how two people deliver what usually takes a team: most MVPs go live in 2–4 weeks. Read the full method on How we work, or see it applied to our own product, InvestKit.
Your project never depends on one person or one place
We're often asked about working with a team based in Ukraine. This is how we keep your project safe.
Your repository, updated daily
Work is pushed to your repository every day, so you always hold the latest code.
Documentation kept current
Architecture notes, setup steps and handover docs are updated as we go, not at the end.
Backup power and internet
The core team works with backup power and redundant internet connections.
No single point of failure
Both of us know your codebase, and a vetted engineer from our network can step in if needed.
Progress you can see
Regular demos and written updates, so you always know where the project stands.
Clients across Europe and the Americas
We work with founders and companies across Europe and with teams in the Americas. We work European business hours with daily overlap for teams in the Americas. Day to day we talk in Slack or Teams, yours or ours, with a weekly demo of working software and short written updates in between.
Every engagement runs in English, under written terms, with an NDA signed before any project details change hands.
The legal entity
- NEXERA AI LLC, limited liability company (TOV) under Ukrainian law.
- Registered on 2 June 2026 in the Unified State Register of Ukraine (EDR).
- Based in Briukhovychi, Lviv district, Lviv region, Ukraine.
- Full registration details are in the legal notice.
Questions, answered
What does the name Nexera mean?
Nexera stands for the next era of AI development. AI agents write most of the code, and a senior developer stays in the loop to write the spec and review every change.
Who is behind Nexera AI?
Two co-founders, Stanislav Cheslavskyi and Oleh Leskiv, who are senior full-stack developers with 12+ years of experience each. Stanislav Cheslavskyi runs discovery, scoping and delivery; Oleh Leskiv owns architecture and code review. Both write production code.
Where is Nexera AI based?
Nexera AI is registered in Ukraine as NEXERA AI LLC, near Lviv. We work with clients across Europe and with teams in the Americas.
How can two people build products so fast?
We run many AI agents in parallel that write most of the code against written specs and tests, and a senior developer reviews every change. That lets two engineers ship an MVP in 2–4 weeks without cutting corners on quality.
Is it safe to work with a team in Ukraine?
Yes. Code is pushed to your repository every day, documentation is kept current, the team has backup power and internet, and both founders know your codebase, so no project depends on one person.
Will I talk to a salesperson or an account manager?
No. Your first call is a free Scope Call with a senior developer, and the same people who scope your project write and review the code.
What working hours and language do you use?
We work European business hours with daily overlap for teams in the Americas, in English. Day to day we talk in Slack or Teams, with a weekly demo of working software.
Do you sign NDAs?
Yes. We sign your NDA, or ours, before any project details change hands. Most of our client work is under NDA.
Talk to the people who will build it
Book a free 30-minute Scope Call with a senior developer. You leave with Product Requirements and a Ballpark.
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