Sergii Gulenok

I had taken over this project about four years ago. I converted a simple WordPress-based website into the platform with a dedicated back office for listing management for the staff and several client-facing sites, the biggest one of which is LandCentury.com. This redesign allowed us to extend the business model to provide subscription services to third-party sellers (increasing revenue by 25%) and internal ad network (which also increased the revenue by 10%) while at the same time reducing the operational cost.

I developed the back-office using PHP 7 with Slim 3 framework, MySQL, and Redis databases and lots of external APIs integration for the back end and Vue.js for the front end. I also built the LandCentury website using the Laravel framework for the back end and Vue.js for buyer and seller dashboards.

As the project grew more significant, I then hired several subcontractors, educated them, and managed their work productivity as a product and project manager. Under my leadership, they had added more features to the product, among which is a simple Google Firebase-based chat system.

I developed a network that connects brands with social media influencers. The website had reached the first 1,000 users in a bit more than a month using itself as a marketing tool and is on its way to returning initial investments by the end of this year.

I built this website using Node.js and Express for the back end, GraphQL as an API layer, MongoDB as a database, and React on the front end. The challenge with this project was to effectively and securely process the enormous number of action tracking events (clicks, leads, and sales) for tens of thousands of promoted links.

I developed an internal application for compensation reviews for a unicorn startup company. They have a highly tailored compensation review process with a lot of steps, and none of the existing out-of-the-box solutions available on the market was not a perfect fit. The two main challenges of the project are:

1. A lot of exceptions to the overall process that required designing a highly flexible and customizable system.
2. The system constraint was having all compensation and evaluation data secure from being read even with direct access to the database and application servers. I designed and implemented a unique system with data encryption on the client-side to support this requirement.

It was a full-stack project, and I implemented it using TypeScript, Node.js, MongoDB/DocumentDB, GraphQL, and React.

I developed a customized 3D CAD tool that was used to design dental implant-based prostheses based on patients' teeth scans. This tool enforced clinical rules, which reduced the number of prostheses returned by warranty. In some cases, it cut the time that dental technicians spent on designing the prosthesis from 1.5 hours (in other software) to under 30 minutes.

The tool was integrated into the customer's order processing system, which sped up the order processing and reduced the number of human errors and waste cases. The version my team released in 2011 also had some UX innovations that were cloned by our competitors in their products.

I developed software for dental labs and scan centers that allowed the submission of prepared and validated orders with attached 3D scans directly into the client's order processing system.

In the first year, this tool increased the number of incoming orders by 5% and by 15% in the next year. The order pre-processing and validation embedded in this tool freed up the order processing system from bad input. This tool did not allow customers to submit orders with poor-quality 3D scans.