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Lengin

Illia logo

Illia

Available now

Full-stack engineer @ Lengin

Mid-level
Seniority
GMT+01:00, Katowice, Poland
Location & Timezone
$45 - $55/hr
Average Hourly Rate
English, Ukrainian, Russian
Languages

Top skills

React.js
Next.js
React Native
Node.js
PostgreSQL
MongoDB
AWS

About

I am a developer with up to 5 years of experience in building scalable, high-performance web applications using React, Next, TypeScript & Node.js. Comfortable working independently or leading features from planning to deployment. I enjoy designing well-structured systems and improving workflows to make development faster and more reliable. Committed to delivering clean, maintainable code and solutions that align with business objectives

Top skills

Verified by Pangea.ai due diligence

Top SkillsCurrent UsageSeniority
React.js
40%4 years
Next.js
15%4 years
React Native
15%3 years
Node.js
10%2.5 years
PostgreSQL
5%1.5 years
MongoDB
5%1.5 years
AWS
10%1.5 years

All skills

Roles and tools, to bring ideas to life and create meaningful experiences

AI & ML Solutions
CRM
E-Commerce
SaaS
ChatGPT
Web Apps
Conversational AI
Booking Systems
Mobile Apps
API
Architecture
Data Analytics and Visualization
Databases
Integrations

Professional experience

Explore a curated selection of projects highlighting Illia's expertise and experience. Each project aims to showcase challenges, solutions, and the final outcome, along with the tools and technologies used.

Projestic LLC
Delivery Management System — Full-stack Engineer
Developer's responsibilities: - Supported a complex web/mobile application using React and React Native; - Refactored key aspects of the project, introducing a structured architecture that improved scalability and enabled faster feature delivery; - Participated in performance optimization efforts, reducing load times and eliminating FPS drops in critical parts of the app; - Created and maintained components and modules with cross-browser compatibility.
Fleet Management
Web Apps
Mobile Apps
SaaS
API
+26

Addax LLC
Document Management System (+AI assistant) — Lead Developer
A CRM for a government organisation to keep track of transactions related to court expenses + an AI assistant chat application. Developer's responsibilities: - Led a project, driving it through the entire development cycle from planning to deployment; - Supported multiple web pages and internal libraries using React & Next on the frontend and Node/Salesforce on the backend; - Connected and integrated external APIs and services; - Automated the deployment process with CI/CD and optimized workflow efficiency with Bash scripts; - Provided test coverage for both frontend and backend;
AI & ML Solutions
Conversational AI
ChatGPT
Web Apps
SaaS
+46

Inforce Digital
Shipment Contracts Signing Platform — Full-stack Engineer
Developer's responsibilities: - Contributed to the development of a cross-platform application using React & React Native; - Took part in establishing and maintaining a scalable frontend architecture, improving development speed and reducing issues; - Provided unit test coverage.
SaaS
Web Apps
Mobile Apps
Enterprise Software
API
+27

Preferred tools

View the preferred tools and apps used by Illia to assess compatibility and alignment.

Git
Git
Discord
Discord
Figma
Figma
Gitlab
Gitlab
Loom
Loom
OBS
OBS
Obsidian
Obsidian

Career highlights

Discover Illia’s professional journey, including employment history, certifications, and educational background.

Full-stack engineer
Projestic LLC2024 - 2025
Full-stack engineer
Addax LLC2023 - 2024
Full-stack engineer
Inforce Digital2021 - 2023

Testimonials

Anonymous

Lengin

Verified Testimonial

Illia is a solid, dependable engineer who gets things done without fuss. He’s great at taking ownership, thinking things through, and delivering clean, working solutions.

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