perfect integers

Custom software development · Europe / US / Asia

Software for custom ideas.

We design, build and evolve custom web systems and native mobile applications for teams that value thoughtful engineering, predictable delivery and a long-term technical partner.

Tell us what you are building
  • PHP · Drupal · JavaScript
  • Web backend · Frontend · APIs
  • Native iOS · Android
  • AI-assisted engineering
15+years delivering custom software
€35+hourly rate, depending on complexity
60+projects delivered across the US, EU and APAC

Expertise

Deep engineering.
Clear delivery.

We join ambitious products at any stage — shaping an idea, extending an existing platform or owning a critical part of delivery.

01

Web systems

Custom platforms, portals and integrations built with PHP, Drupal and modern JavaScript. We handle backend architecture, custom Drupal modules, decoupled and headless CMS builds, REST and JSON APIs, data migrations and accessible front-end experiences.

  • PHP
  • Drupal
  • Symfony
  • JavaScript / TypeScript
  • REST / JSON APIs
02

Document experiences

Advanced PDF.js products for parsing, rendering, reviewing and annotating PDFs. We build accessible document workflows, custom viewers and embeddable interfaces that work across devices and partner websites.

  • PDF.js
  • PDF rendering
  • Annotations
  • Accessibility
  • Embeddable UI
03

Native mobile

Purpose-built iOS and Android applications with native performance, robust offline behaviour and direct access to platform APIs. New development and long-term evolution across modern and established native stacks.

  • Swift / SwiftUI / UIKit
  • Objective-C
  • Kotlin / Jetpack Compose
  • Android SDK
  • Mapbox SDK
04

AI-assisted delivery

Practical AI in the engineering workflow and in the product where it creates measurable value. Faster iteration, careful review and maintainable results.

  • AI integration
  • LLM APIs
  • Workflow automation
  • Developer tooling
  • Human review

Selected work

Complex products,
made useful.

01

Public-sector technology · United States

Making complex public documents easier to explore and discuss

End-to-end engineering for an award-recognised civic technology platform used to publish plans and policies, collect contextual feedback and integrate interactive experiences into partner websites. We build and maintain the PHP and JavaScript platform across backend, frontend and embedded delivery, including custom PDF.js viewers, document rendering, in-context annotations and accessible PDF workflows.

Recognised among the GovTech 100 — a selection of companies making a difference in US state and local government technology.

PHP · JavaScript / TypeScript · PDF.js · REST APIs · Partner integrations

02

Mobility technology · Germany

Native route planning for demanding field operations

Native iOS and Android applications for a German multi-stop routing service. Built with modern Swift and Kotlin frameworks, native platform APIs and Mapbox SDKs, the mobile experience turns complex route plans and hundreds of destinations into practical map-led workflows for people on the move.

One product experience across two native platforms, engineered for performance, maintainability and real-world navigation.

Swift · Objective-C · Kotlin · Native iOS / Android · Mapbox SDK

The team

Senior people.
Direct collaboration.

No stock portraits and no layers of account management. You work with the people responsible for delivery.

Stanislav Miletskii

Founder & CEO

15+ years in custom software development, delivery and team management.

Maxim Sapilov

Full-stack developer

Backend-focused engineer experienced with PHP and JavaScript frameworks.

Eugene Zarin

Backend developer

Experienced in PHP, JavaScript frameworks and reliable product engineering.

Vadim Smolyak

Mobile developer

Native iOS and Android engineering with strong Mapbox experience.

Start a conversation

Have a complex idea?
Let’s make it clear.

hi@perfectintegers.com