About OSKI

An engineering company run by engineers.

OSKI Solutions builds and runs software for companies in the US, Europe, Israel and beyond. We are an EU-registered company, and most of our team works from Ukraine. Since 2019 we have grown from a small group of .NET developers into a team of 25 who design, build, test and support business-critical systems.

Meet the team Check us in the Estonian register

Company factsVerified 2026

OSKI Solutions OÜReg. 16525070 · Kaupmehe tn 7-120, Tallinn

EUcompany

In-house team, mostly in UkraineEngineers, QA and management, no subcontractors

25people

Clutch rating7 verified reviews, every score 5.0

5.0/ 5

Registered Umbraco PartnerMore than 10 years on Umbraco and .NET

10+years

Our story

From a few .NET developers to a full product team.

OSKI grew the slow way: one client at a time, mostly through referrals and long engagements. Several clients have worked with us for years. One of our earliest partnerships, with a US software consultancy, ran from 2021 to 2025.

client countries in our case studies: France, Hong Kong, Israel, United States, Denmark, Ukraine, Canada, Germany.

2019 · OSKI starts
A small team of .NET and Umbraco engineers from Ukraine starts taking on client work under the OSKI name.
2021 · Long-term partnerships
A German software company brings us onto a large business portal, and a US consultancy starts delivering Umbraco projects with us under its own brand. We publish our first Umbraco package.
2022 · OSKI Solutions OÜ in Tallinn
The company is registered in Estonia, inside the EU. In February we begin a monthly support program for Ukraine’s defenders. OskiStarterKit goes live on NuGet.
2023 · Products and bigger builds
We build an in-house CRM for Lokad in Paris and an MVP for KursyPOL in Warsaw. VMK Group adopts our time and CRM platform. umContentCreator brings AI into the Umbraco editor.
2024 · Platforms at scale
Work starts on Ben-Gurion University’s 80,000-page platform, the Omoda Denmark EV launch site and the EducatedOn AI learning platform.
2025 · AI in production
An AI assistant for Lokad, a transcription pipeline at 99% precision, Alliant’s multi-site platform, the Auto.co.il rebuild and Peregrine Ship’s fulfillment platform.
2026 · Today
Umbraco 17 and .NET 10 migrations, new AI packages for Umbraco, and 25 people on the team.

How we work

Four commitments behind every project.

Plain rules that clients can check us against, and that show up in their reviews.

Say what we will deliver, then deliver it

Every engagement starts with a written scope and estimate. Clients on Clutch rate us 5.0 for schedule and cost, not only for quality.

Engineers you can meet

Everyone who works on your project is an OSKI employee. No anonymous subcontractors, and the CTO joins the first call.

Code you can own and maintain

Your repositories, your infrastructure, full IP assignment. Clients like Lokad review our pull requests against their own standards.

Give back to the platform

We publish the tools we build: 11 packages on NuGet with 51.9K downloads, most of them free and MIT-licensed.

The team

25 people, every one of them on staff.

These are the people who will design, build and test your software. You can meet any of them before the project starts.

Kyrylo OsadchukFounder & CEO

Founded OSKI in 2019 and has led it since. Owns client relationships, delivery quality and the company’s support program for Ukraine.

Roman OleksukChief Technology Officer

Leads architecture and engineering standards. Runs every discovery call himself, so estimates come from the person accountable for delivery.

Andrii PolchanovChief Financial Officer

Runs finance, contracts and invoicing, so pricing stays transparent and paperwork stays simple for clients in the EU and US.

Volodymyr KotsurSenior QA Automation Engineer

Oleksandr KorenivskyiFull-Stack Developer

Natalia BukatarFull-Stack Developer

Maksym YelyseievFull-Stack Developer

Rafael MamedovMobile Engineer

Oleksandr LuhovoiSoftware Developer

Mykyta OparkoFull-Stack Developer

Volodymyr KolisnykSoftware Developer

Michael RazuvaevFrontend Developer

Hryhorii TsyapaFull-Stack Developer

Ivan BilotserkivskyiFull-Stack Developer

Iustin PopoviciFull-Stack Developer

Andrii KhodakivskyiSoftware Developer

Mykhailo RadzievskyiMobile Engineer

Bohdan SerhieievFull-Stack Developer

Alexey DaniloFull-Stack Developer

Dmytro DemenchukFull-Stack Developer

Ihor HydaFull-Stack Developer

Ihor PanasenkoFull-Stack Developer

Mykyta ChizhikovFull-Stack Developer

Viktor SinkovskyiReact Native Developer

Natalia MelnykAccountant

We are hiring .NET, Vue and React engineers, and we run an internship where students and recent graduates work on real projects with senior mentors. High performers are offered full-time roles.

Work with us

Life at OSKI

We get together away from the screen, too.

The people on your project know each other beyond the stand-up. These photos are from our 2023 team day by the river: paddleboarding, laser tag and a barbecue.

The OSKI team on a wooden pier by the river, 2023

OSKI team members getting paddleboards ready at the river

Two OSKI engineers grilling at the team barbecue

Proof you can check

Don’t take our word for it.

Ratings, registration and download numbers below link to their public sources: independent review platforms, the Estonian business register and NuGet.

5.0/ 5

Clutch · 7 reviews

5.0/ 5

The Manifest · 7 reviews

4.8/ 5

Techreviewer composite score

Registered

Estonian e-Business Register · 16525070

Read every review in full →

51.9K package downloads

9 Umbraco packages and 2 companion libraries published on NuGet under our name.

See our products →

28 published case studies

Named clients include Lokad, Ben-Gurion University, Alliant, Auto.co.il, Omoda Denmark, Peregrine Ship and Jongeneel.

Browse case studies →

Listed where buyers look

Company profiles on Clutch, The Manifest, Techreviewer, DesignRush, GoodFirms, G2 and LinkedIn.

Clutch · The Manifest · Techreviewer · DesignRush · GoodFirms · G2 · NuGet packages · LinkedIn

Beyond code

Supporting Ukraine, every month since February 2022.

Most of our team lives and works in Ukraine. Supporting its defenders and civilians is a fixed line in our budget, not a one-off campaign. Each delivery is logged with a date, the receiving unit and proof.

Technical equipmentMavic drones, electronic warfare gear and charging stations, bought against specific requests from units.
Transport and repairsA pickup truck funded in full, repairs to vehicles used by Defense Intelligence, and tires and repairs for other units in 2026.
Tactical medicineIndividual first-aid kits worth more than $3,000, delivered through Tacmed Ukraine in 2025.
Civilians affected by warDirect support in 2026 for civilians injured in a drone strike.
Volunteer initiativesFunding for verified fundraisers and civic organizations, including the NGO HAR.

“We can't promise to solve everything. But every month we can guarantee one concrete, verified delivery.”

Kyrylo Osadchuk, CEO

Letter of gratitude to the OSKI Solutions team from the commander of military unit A3458

DJI Mavic 3 drones purchased for a military unit

Pickup truck funded by OSKI for a military unit

Start a project

Want to meet the team behind the work? Start with a 30-minute call.

A spec, a Figma file or three paragraphs is enough to start.

First reply · from an engineer, not a sales rep
30-min call · with Roman, our CTO, to clarify scope
After the call · a written proposal with plan, team and price

Roman Oleksuk, CTOPrefer to talk? Pick a slot in Roman's calendar