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Services

We develop websites and apps that do exactly what you need. We specialize in custom web development services, which means that your solution will be tailored to perfectly fit your business.

Expertise

Leverage our experience and hands-on knowledge of industry domains and specialized solutions.

Technologies

We use mostly open-source technologies, which significantly cuts development costs without compromising on quality and security.

Company

Greenice is a Top Rated web development agency established in 2007.

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Sergii Opanasenko
Sergii Opanasenko - Co-founder and COO at Greenice

Sergii is responsible for establishing and overseeing the main business operations at Greenice. In particular, he supervises web development, QA, project management, HR, and sales. Sergii’s job is to ensure that all puzzle pieces of the business come together to provide the best service to our clients. 

Sergii is a problem-solver and critical-thinker. Teammates come to him with challenging questions from both the technical and business areas.  

Opanasenko has a strong technical background. When launching Greenice, he already had extensive experience in web development and project management. He started as a freelancer and then decided to create an agency with his partner Ismet Beckirov (learn more about this in ‘Our Story’). 

He has a bachelor’s degree in Precision Mechanics and Metrology Engineering. 

Outside of work, Sergii enjoys spending time with his family. He also loves yachting and travelling.

Connect with Sergii on Linkedin

 

Specializes
Business Automation Marketplace Start a Project Technologies eLearning

Articles

How to Build a Custom ERP System: the 8 Step Guide
Business Automation How to Build a Custom ERP System: the 8 Step Guide

A failure of an ERP development project can cause a major setback for the entire company, or even its death. In this article, we’ll talk about the 8 ways of avoiding those pitfalls, by carefully planning your custom ERP software. We share our own experiences, as well as the experience of others, so be prepared for a lot of examples.

Kateryna Reshetilo
08.05.2025
How to Create a Tech Startup Without a Technical Co-Founder
Start a Project How to Create a Tech Startup Without a Technical Co-Founder

Do not fall victim to the stereotype that it is impossible to start your own tech startup without a tech co-founder who rules the development process. There are thousands of examples of successful entrepreneurs who reached the top without a tech-savvy partner.

We are going to show you the way out!

Watch out! After reading this you will not be able to use the excuse that you did not build a tech company because you didn’t have a tech co-founder!

Kateryna Reshetilo
08.05.2025
How to Build a Classified Website like Craigslist
Marketplace How to Build a Classified Website like Craigslist

A blank list with blue hyperlinks on it could never catch today's user’s attention... or could it? These numbers tell a different story: $1 billion of annual revenue, 50 billion monthly page views, 100 million ads posted monthly, 70 countries covered and 15 languages supported! And all this is from a company of 50 employees who maintain a page of few features and an old-fashioned ‘newspaper-like’ user interface that has not changed for 25 years!  Craigslist is a phenomenon of the eCommerce industry, and it is definitely worthwhile to discover the secrets of its success. What options do startupers have when aiming to build a website like Craigslist today? Let’s find out!

Kateryna Reshetilo
08.05.2025
How to Create a CRM from Scratch Step-by-Step?
Business Automation How to Create a CRM from Scratch Step-by-Step?

A Customer Relationship Management System is an indispensable tool for modern sales, marketing, and customer support managers. There are hundreds of off-the-shelf CRM solutions on the market, but more than half of their users struggle with them daily because they don’t fit the business processes or simplify routine actions.

If you’ve experienced the deficiencies of a ready-made CRM functionality, pay too much for features that you don’t use, or are unable to integrate the CRM with third-party software, then take a look at our guide on how to build a CRM. Let’s dive in!

Sergii Opanasenko
08.05.2025
Applying DSA and DMA Rules to Your Online Marketplace
Marketplace Start a Project Applying DSA and DMA Rules to Your Online Marketplace

There are more than 10,000 online platforms in the EU, 90% of which are small or medium size. These platforms experience tough competition and are forced to play by the rules imposed on them by large marketplaces.

On December 15, 2020, the European Commission introduced the new rules for creating a safe and fair digital environment described in the Digital Services Act (DSA) and Digital Markets Act (DMA). Those who do not comply with these rules risk losing up to 10% of their annual revenue in fines; they might even be banned. At the same time, the new regulations give a boost to small businesses and startups who have not been able to compete with the industry gatekeepers.

What should business owners and startups get ready for? How to update your platform in accordance with new rules? Let’s find out!

Kateryna Reshetilo
28.04.2025
How to Create a Stock Photo Website Like Shutterstock, But Better
Marketplace How to Create a Stock Photo Website Like Shutterstock, But Better

Visual content is a powerful tool used by marketers and bloggers. It can increase audience engagement, brand awareness, and click-through rate on websites. Taking into account the incrementally growing interest in visuals for the years to come, why not build a website like Shutterstock?

We will give you the most important things you need to know based on a decade of experience in web development! Dive in.

Sergii Opanasenko
28.04.2025
AI
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