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Portrait of Illia Kryvoshchenkov overlooking the Mediterranean at sunset
IK
ILLIA KRYVOSHCHENKOV

FULL-STACK ENGINEER · 5+ YEARS

Building the engine
behind the
experience.

React interfaces. Node.js services. React Native apps.
I build and ship products end to end.

TYPESCRIPT / REACT / NEXT.JS / NODE.JS / NESTJS

BASED IN

Berlin, Germany

Open to relocationLet’s talk
Explore selected work

ILLIA KRYVOSHCHENKOVWEB / MOBILE / CLOUD

Selected work

Production systems that move the real world.

2021—NOW
012024—NOW

Telecom

Infrastructure
behind ~1M users.

Backend services for eSIM, phone number provisioning, call routing and VPN.

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Node.js / NestJS / SIP / VoIP / PostgreSQL / Redis

022024—NOW

Mobility

Real-time systems
that keep moving.

Modernized a legacy ride-hailing backend with event-driven flows and a WebSocket layer for real-time ride tracking.

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Node.js / NestJS / WebSockets

032024—NOW

Connected devices

Remote control
for connected devices.

MQTT-based device control through AWS IoT Core for real-time remote management of connected devices.

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MQTT / AWS IoT Core / Node.js

042021—2024

Computer vision

Reading fuel prices
from the roadside.

Built mobile and backend components of a computer-vision product that recognized competitor fuel prices from roadside signage.

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React Native / Node.js / NestJS

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Experience

5+ years building production software end to end.

  1. Kevych Solutions

    Full Stack Engineer (current)

    Node.js and NestJS services across telecom, mobility and IoT, plus React and Next.js admin dashboards and partners pages. Architecture standards, production delivery and backend mentoring.

    Open source

    Remote evaluation, ETag caching, a tracking plugin system, sticky bucketing storage and the immutable 2.0 API for the official SDK.

    GrowthBook PHP SDK

    Telecom, Mobility, IoT, Healthcare, ERP

  2. Appexoft

    Full Stack Engineer

    Built React Native and Node.js products for fuel-price recognition and retail pricing, including mobile POS price updates.

    Computer vision, Retail, Mobile

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Capabilities

Technology as a tool to build real products.

I work across the stack to design, build and scale products — from AI-powered features to real-time platforms and modern web and mobile applications.

AI & LLM

  • OpenAI / Groq
  • Streaming integrations
  • RAG pipelines
  • Prompt engineering
  • Voice AI (STT / TTS)
  • ElevenLabs

Frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • TanStack Query
  • Zustand
  • Three.js
  • WebSockets
  • SEO

Backend

  • Node.js
  • Nest.js
  • PostgreSQL
  • Redis
  • MongoDB
  • Kafka
  • GraphQL
  • Microservices
  • Stripe
  • PHP

Mobile

  • React Native
  • Expo
  • Deep Linking
  • Push Notifications
  • In-App Purchases
  • Ionic

Platform & DevOps

  • AWS (S3, Lambda, RDS)
  • Docker
  • GitHub Actions
  • Cloudflare
  • Nginx
  • Sentry
  • GA4 / Amplitude
  • Playwright
  • Jest

Real-time & Streaming

  • WebSockets
  • MQTT
  • SIP / VoIP
  • Event-driven systems
  • Real-time data pipelines
  • Streaming architectures

Scalable systemsReal-time infrastructureAI-powered products

Continuously exploring what’s next.

Contact

Available for new opportunities

Have something worth building?

Let’s build something meaningful.

Full-StackBackendProduct Engineering