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Kyiv • Since 2021

Transform ideas into digital products that scale

We craft custom software, native mobile apps, and data-driven advertising campaigns. From initial concept to market launch, we deliver solutions that drive measurable results.

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What we offer

Comprehensive digital solutions

We combine technical expertise with strategic thinking to deliver outcomes that matter.

01

Custom Software

Build scalable web platforms, APIs, and enterprise applications that grow with your business.

Web applications API development Cloud infrastructure System integration
02

Mobile Apps

Native and cross-platform mobile applications for iOS and Android with performance-focused design.

iOS & Android Cross-platform App optimization Push notifications
03

Advertising

Strategic campaigns across digital channels with data-driven approach to maximize ROI and reach.

Digital advertising Media planning Performance marketing Analytics & reporting
04

Support & Maintenance

Ongoing technical support, monitoring, and updates to keep your systems running smoothly.

24/7 monitoring Bug fixes Performance optimization Security patches
05

Consulting

Technical strategy and architecture guidance to help you make informed decisions about technology.

Technical audits Architecture planning Technology selection Team training
06

Design & UX

User experience design and visual identity to create interfaces that users love and engage with.

UI/UX design Prototyping Design systems User research
E-commerce 2024

E-commerce Platform Modernization

Transformed a legacy retail system into a modern, scalable platform serving 50,000+ daily users with improved performance and reduced costs.

Challenge

Our client needed to migrate from an outdated monolithic system to a cloud-native architecture. The legacy platform couldn't handle growing traffic and required constant maintenance.

Solution

We delivered a complete rebuild using modern frameworks, implemented real-time inventory management, and integrated multiple payment gateways. The new platform features microservices architecture with auto-scaling capabilities.

Results

-65%
Page load time
+28%
Conversion rate
-40%
Infrastructure cost
6
Months
8
Specialists
50K+
Daily users
Portfolio

Selected work

Recent projects across industries combining technical excellence with business impact.

Mobile

Healthcare Mobile App

Patient management system with telemedicine integration.

React Native Healthcare
SaaS

Analytics Platform

Real-time data visualization and reporting tool.

Vue.js Analytics
Education

E-learning Platform

Interactive course delivery with video streaming.

Next.js Video
FinTech

FinTech Dashboard

Financial data aggregation and visualization platform.

React Security
Retail

Retail Mobile App

Loyalty program and in-store navigation app.

Flutter Location
Marketing

Campaign Platform

Multi-channel campaign management with A/B testing.

Angular Automation
Process

How we work

A transparent, iterative process that keeps you informed at every stage.

01

Discovery & Planning

We start by understanding your goals, constraints, and success metrics.

  • Requirements analysis
  • Technical architecture
  • Project roadmap
02

Design & Prototyping

Create wireframes, user flows, and interactive prototypes.

  • User research
  • Wireframing
  • Prototype testing
03

Development & Testing

Agile development with weekly demos and continuous integration.

  • Iterative development
  • Quality assurance
  • Performance optimization
04

Launch & Support

Smooth deployment, monitoring setup, and ongoing support.

  • Production deployment
  • Monitoring & alerts
  • Maintenance & updates
Testimonials

Client feedback

What our partners say about working with us.

"PEI-SYSTEMS delivered our mobile app ahead of schedule. The team's attention to detail and proactive communication made the entire process smooth."

Alexandra Petrov Product Manager, HealthTech

"Their advertising campaigns consistently outperform our previous efforts. The data-driven approach helps us make informed decisions and scale effectively."

Dmitry Volkov Marketing Director, E-commerce

"The software platform they built handles our growing user base without issues. Their support team is responsive, and the code quality is excellent."

Maria Ivanova CTO, SaaS Platform
Impact

By the numbers

Measurable outcomes from our recent projects.

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Projects delivered
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Client satisfaction
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Active clients
0
Years experience
Contact

Get in touch

Ready to start your project? Tell us about your goals, and we'll respond within one business day.

Email directly
PEI-SYSTEMS LLC
Lavrska Street, building 6
Kyiv, 01010
Ukraine
+380998193574

Registration: 13.10.2021
Code: 44487727