DevCats is a software development and digital marketing company helping businesses build innovative products, automate operations, and grow through technology.
Founded in 2008, we bring over 18 years of experience and 300+ projects to every new challenge. Our team combines human expertise with AI-powered tools to deliver reliable, scalable, and business-focused solutions.
Our core services include:
Custom Software Development: Web and mobile applications, CRM and ERP systems, SaaS platforms, e-commerce solutions, and business websites.
AI Development & Automation: AI agents, intelligent workflows, customer support automation, sales process optimization, and document processing.
Digital Marketing: SEO, GEO (Generative Engine Optimization), Google Ads, ChatGPT advertising, and App Store Optimization (ASO).
Code & Data Security: Security audits, vulnerability identification, and remediation for existing applications.
Why work with DevCats?
We believe great technology starts with understanding business goals. Our approach combines experienced developers, practical AI technologies, transparent communication, and individual attention to every project.
From initial consultation and product architecture to development, deployment, and ongoing support, we focus on building long-term partnerships and delivering measurable business value.
With a distributed team across Europe, DevCats helps companies turn complex challenges into practical digital solutions.
Full Stack Development for English Training Ecosystem Co
Custom Software Development
Confidential
Nov. 2010 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"DevCats is deeply committed and focused on results."
Nov 5, 2026
CEO, Yappi
Vitaliy Vasiliev
Verified
Education
Kyiv, Ukraine
51-200 Employees
Online Review
Verified
DevCats provides full stack development for an English training ecosystem company. The team handles the client's platform, websites, servers, and security, and builds their architecture and internal systems.
DevCats has built a functioning IT infrastructure and continuously improves the client's business processes. The team has improved the client's speed of product delivery and communication. DevCats is deeply committed, focused on results, and has a fast response time to security risks.
BACKGROUND
Introduce your business and what you do there.
I’m the CEO and Co-founder of Yappi Group, a corporate English training Ecosystem serving over 500 corporate clients. We tailor our courses to business needs, combining teacher-led lessons, digital tools, and personalized support to help employees use English effectively at work.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with DevCats?
We needed a technology partner to develop, maintain, and support our digital ecosystem. This included full-stack development, security, server maintenance, monthly product updates, tools for collaboration across teams, and ongoing IT support.
SOLUTION
What was the scope of their involvement?
DevCats has developed and maintained our digital ecosystem, including the yCloud platform, two websites, server infrastructure, and security. They have shaped the system’s architecture in collaboration with our internal teams. Their work includes authentication, student and HR modules, speaking club functionality, and dedicated accounts and tools for teachers, account managers, methodologists, and other internal staff.
What is the team composition?
We’ve worked with 2–5 teammates from DevCats.
How did you come to work with DevCats?
Our partners recommended DevCats. We chose them because they were based nearby, were a good cultural fit, and shared our company’s values.
What is the status of this engagement?
We started working with DevCats in November 2010, and our engagement is ongoing.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
DevCats has built IT infrastructure that supports our business processes and continues to improve it as our needs evolve. Their work has helped us deliver products faster and improve communication between teachers, internal teams, students, and corporate clients, strengthening our competitive position. During our partnership, we have grown from serving 500 students to more than 6,000. DevCats helped us transition from offline to fully online services during the COVID-19 pandemic and establish an online publishing operation for learning materials and coursebooks. We have reduced product delivery times and handled growing demand without a proportional increase in team size. We also value their responsiveness and proactive approach to security and business continuity. For example, they moved our servers abroad when the Russian invasion threatened Kyiv in 2022. They continue to maintain our CRM and the wider IT ecosystem despite ongoing external disruptions. DevCats understands how technology needs to support our business. Their contribution has helped us scale, improve efficiency, and keep our services running through difficult circumstances.
How did DevCats perform from a project management standpoint?
DevCats delivers on time and works well with our internal teams. We communicate through in-person and virtual meetings, email, and messaging apps.
What did you find most impressive about them?
DevCats is deeply committed and focused on results.
Are there any areas they could improve?
They could be more proactive in introducing new technologies and suggesting how these could benefit our business.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Showing 1-1 of
1 Reviews
Our Story
DevCats began with a simple belief: great software is built by people who care.
Since 2008, our team has delivered 300+ projects, turning ambitious ideas into useful digital products. Today, our specialists work across Europe, combining proven engineering with practical AI.
We value honest communication, thoughtful problem-solving, on-time delivery, and long-term partnerships.
Every project gets our attention — not just our code.
Contact DevCats
If you’re not seeing exactly what you need here, send this company a custom message.
You can talk about your project needs, price, and timeline to get started on your project.
Sign in to see which brands trust DevCats.
Get connected to see updates from DevCats like new case studies, latest reviews, their latest masterpieces in their portfolio, delivered straight to you.