Ihor

Position: Senior Full-Stack Developer
Name: Kaleniuk Ihor
English level: A2-B1
(Good reading and writing skills, limited speaking proficiency)
Location: Lviv, Ukraine
Phone number: [открыть контакты](см. выше в блоке «контактная информация»)
Email: [открыть контакты](см. выше в блоке «контактная информация»)
Telegram: https://t.me/super_web_developer

CV
Kaleniuk Ihor

2026.

Senior Full-Stack Developer with 9+ years of experience building high-performance web platforms using
React, Next.js, Node.js, and PostgreSQL. Specialized in real-time systems, GIS, and AI-powered apps.
Successfully led teams, launched production-ready solutions, and contributed to open-source.
Passionate about scalable architectures, pixel-perfect UI, and DevOps automation.

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>_ About me:... 3
>_ Experience:...4
Company name: MicroGIS (Full-time in office)... 4
Company name: Interexy (Full-time at remote)...4
Company name: STAR-Systems (remote / part-time)...4
Company name: UA Tech People (Full-time at remote)...4
>_ Tech Stack & Expertise:... 5

🧠
Skills description...5
Tech Stack & Expertise... 5
>_ Education:...6
Natural Sciences College at the University named after I. Frank...6
NLTU (National Forestry University of Ukraine)... 6
NLTU (National Forestry University of Ukraine)... 7
NLTU (National Forestry University of Ukraine)... 7
>_ Projects:...7
_Project №1... 7
_Project №2... 7
_Project №3... 7
_Project №4... 8
_Project №5... 8
_Project №6... 8
_Project №7... 8
_Project №8... 8
_Project №9... 9
_Project №10... 9
_Project №11...9
_Project №12... 9
_Project №13... 10
>_ Open Source Contributions:... 11
>_ My production projects:... 12

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>_ About me:
With enthusiasm and dedication to every task, I am undoubtedly the programmer who embodies a
passion for technology and a drive for excellence. Known for my cheerful disposition and perseverance, I
consistently bring projects to 100% completion, leaving no room for ambiguity or unfinished business. My
ability to ask the right questions and find efficient solutions enables me to successfully tackle even the
most challenging tasks.
Friendly and open, I value teamwork and possess the ability to connect with colleagues, achieving high
results together. My passion for video games not only reflects my love for technology but also nurtures
strategic thinking, attention to detail, and the ability to swiftly adapt to new conditions.

My love for the sea symbolizes my quest for harmony and balance, which in turn is reflected in my ability
to maintain a healthy work environment and strengthen team spirit. I am confident that my optimism,
creative approach, and unwavering commitment to growth and development will make a significant
contribution to the success of your company.

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>_ Experience:

Company name: MicroGIS (Full-time in office)
Position: Front-end developer
Time interval: 20.03.2017 - 30.06.2019
Technologies: Javascript, JQuery, CSS, LESS, OpenLayer, WebGL
Description: A product company that specializes in navigation systems and cartography. I had to work
with GPS trackers, large volumes of data that needed to be displayed on the map and optimized.
Development of a 3D version of the map and displaying objects on it using WebGL.

Company name: Interexy (Full-time at remote)
Position: Full-stack developer
Time interval: 11.07.2019 - 20.06.2022
Technologies: React, NextJS, Angular, VueJS, SCSS, less, OpenLayer, ThreeJS, Node.js
Description: A large outsourcing company where I worked on numerous projects, but I would like to
highlight those in the medical field and for the restaurant business. Gained substantial experience in
team management and decision-making regarding project development and technology implementation
choices in the role of a technical lead.

Company name: STAR-Systems (remote / part-time)
Position: Full-stack developer
Time interval: 10.07.2022 - 30.01.2024
Technologies: React, NextJS, Angular, VueJS, SCSS, less, OpenLayer, ThreeJS, Node.js, ReactNative,
Kotlin
Description: I worked as a freelancer, taking on various projects from freelance platforms and
acquaintances who are entrepreneurs. The range of projects was vast, from mobile games to taxi service
aggregators. I've worked on numerous websites, with the most recent being a POS system featuring
PRRO technology, and mobile site integration between Kotlin and NextJS.

Company name: UA Tech People (Full-time at remote)
Position: Full-stack developer
Time interval: 14.02.2024 - Current time
Technologies: Node.js, Express, TypeORM, NestJS, PostgreSQL, AWS
Description: An outsourcing company engaged in the development of commercial web-based
management products, management systems, and video render flow solutions. And AWS DevOps
management.

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>_ Tech Stack & Expertise:

Skills description

I have worked with many technologies, both on the front-end and the back-end. I have
excellent knowledge of and have worked with React and Node.js for over 5 years. I also
have extensive experience in writing socket connections, and I have used UI libraries such
as Mantine and Material UI. I am highly experienced in SEO optimization for web
applications, and every project where it was applicable has achieved a Lighthouse
performance score of at least 95%. I have also worked as a team lead in a small team for
several years, giving me solid experience in task planning, communication, and application
architecture. In addition to web development, I have experience building Android
applications in Kotlin and desktop applications in C#.

I actively use modern AI-powered development tools and AI agents as engineering
assistants to improve productivity, accelerate development, automate repetitive tasks, and
enhance code quality. I see AI as a force multiplier that helps me deliver solutions faster
while maintaining high engineering standards.

The table below lists only my primary technical skills; I have experience with many additional
technologies and tools that are not included here.

🧠 Tech Stack & Expertise
🖥 Front-end Development
● React (8+ yrs) — deep expertise in building complex SPAs, hooks, state
management, and performance optimizations
● Next.js (5 yrs) — SSR, API routes, full-stack integration, image optimization, and
hybrid rendering
● Angular (3 yrs) — experience with enterprise-scale apps, RxJS, and module-based
architecture

🛠 Back-end Development
● Node.js (6 yrs) — high-performance APIs, worker threads, file streams, and real-time
systems
● Express.js (5 yrs) — RESTful APIs, middleware pipelines, authentication layers
● NestJS (3 yrs) — scalable microservices and modular architecture with TypeScript
● AdonisJS (2 yrs) — elegant full-stack applications with ORM and authentication
● Fastify (1.5 yrs) — ultra-fast API services with schema-based validation and hooks

🎨 UI / Design Systems
● Mantine UI (2 yrs) — modern React components with styling system and
accessibility in mind

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 ● Material UI (3 yrs) — consistent design implementation and theme customization
SCSS / SASS / LESS / CSS (5+ yrs) — responsive, modular, and maintainable
stylesheets

📐 Design & Prototyping
● Figma (4 yrs) — UI prototyping, component libraries, team collaboration

● Adobe Photoshop (2 yrs) — graphic editing, image manipulation, and UI assets
production

🗄 Database Systems
● PostgreSQL/PostGIS (6 yrs) — advanced querying, indexing, performance tuning,
pgvector integration
● MongoDB (3 yrs) — schema-less document storage and aggregation pipelines
● MySQL/SQLite (2 yrs)
● Firebase (2 yrs) — real-time data sync and auth for mobile/web apps
● Redis (3 yrs)

🧬 Version Control & Collaboration
● Git (GitHub, GitLab, Bitbucket) — CI/CD integration, branching strategies, code
review

📋 Project & Task Management
● Experience with Jira, Monday.com, Worksection, Trello and Linear for agile
development, sprint planning, and team coordination

🔁 CI/CD & DevOps
● CI/CD configuration with GitHub Actions, GitLab CI, and Bitbucket Pipelines
● Experience deploying full-stack apps with Docker, SSH, and environment-based
pipelines
● Partial administration of AWS (EC2, S3, Route 53) and Nginx (reverse proxy,
caching, gzip, SSL)

AI Technologies

● ONNX Runtime (DirectML GPU) & NCNN (Vulkan) — Local on-device AI inference
and optimization
● GPU Orchestration with Vast.ai & RunPod Serverless — Remote GPU
provisioning and inference over SSH
● FLUX.1-dev Ecosystem — Server-side image generation with LoRA fine-tuning,
ControlNet, and IP-Adapter

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>_ Education:

Natural Sciences College at the University named after I. Frank
Time interval: 01.09.2015 - 01.06.2018
Department: Computer Sciences
Diploma: junior specialist
Status: Completed

NLTU (National Forestry University of Ukraine)
Time interval: 01.09.2019 - 01.06.2021
Department: Computer Sciences
Diploma: Bachelor
Status: Completed

NLTU (National Forestry University of Ukraine)
Time interval: 01.09.2021 - 01.06.2022
Department: Computer Sciences
Diploma: Master's degree
Status: Completed

NLTU (National Forestry University of Ukraine)
Time interval: 01.09.2023 - Current moment
Department: Department: Technologies of environmental protection
Diploma: Bachelor
Status: In progress

>_ Projects:

_Project №1
Name: Secured by NDA
Technologies: JQuery, JavaScript, css
Year: 2017
Rank: Junior
Description: A project focused on calculating the ballistics of an object's flight in space, displaying the
flight trajectory based on the initial point, taking into account wind direction, and all physical components
such as air resistance and gravitational forces.

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_Project №2
Name: MicroGIS MAP
Technologies: JQuery, JavaScript, css, OpenLayer, WebGL
Year: 2017-2019
Rank: Junior / Middle
Description: A navigational cartographic project that operates with various maps and coordinate systems
such as WGS84 and SK42, following EU and Ukrainian standards. The project's distinctive feature is its
openness and the possibility of basic use without any restrictions. Users can create various objects and
polygons with specified specifications on the map.

_Project №3
Name: Secured by NDA
Technologies: React, JavaScript, scss, web socket, canvas, push notification
Year: 2019
Rank: Middle
Description: A monitoring and control system for power generators in industrial settings that collects and
analyzes data, and depending on the situation, either takes action or notifies the responsible employee
about an incident.

_Project №4
Name: Secured by NDA
Technologies: NextJS, JavaScript, scss, web socket, canvas, push notification, crypto
Year: 2020
Rank: Middle
Description: A document management system in a company, featuring access levels and user roles, a
flexible system for setting up company employees, automated calculations of salaries, and tracking of
working hours.

_Project №5
Name: Secured by NDA
Technologies: JQuery, JavaScript, css, OpenLayer, WebGL
Year: 2020
Rank: Middle
Description: An online platform for purchasing automotive parts.

_Project №6
Name: PIK Broker
Technologies: NextJS, TypeScript, SCSS, NodeJS, Express, PostgreSQL
Year: 2020
Rank: Middle
Description: A system for buying, selling, and exchanging real estate.

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_Project №7
Name: Secured by NDA
Technologies: React, TypeScript, SCSS, Web Socket
Year: 2020
Rank: Middle
Description: An insurance company system based on neural networks that calculates the risk level and
insurance cost for clients.

_Project №8
Name: Secured by NDA
Technologies: ReactNative, NextJS, node.js, Express, SCSS, postgreSQL, Canvas
Year: 2021
Rank: Middle
Description: A medical mobile application for pediatric hospital doctors, designed for the collection and
monitoring of development data for children with deviations. The doctor starts the work shift by recording
data in the mobile application. Subsequently, this data can be analyzed in the control panel to identify
trends in development, improvement, or deterioration of conditions.

_Project №9
Name: Secured by NDA
Technologies: ReactNative, NextJS, node.js, Express, SCSS, postgreSQL, Canvas
Year: 2021
Rank: Middle
Description: An application with a discount system, online ordering, and reservations for a network of
restaurants and partner restaurants. It also includes a referral bonus system, where users receive
bonuses in a percentage of the bill amount of the referred client.

_Project №10
Name: Secured by NDA
Technologies: NextJS, TypeScript, SCSS, NodeJS, Express, PostgreSQL
Year: 2022
Rank: Middle
Description: An insurance company system based on neural networks that calculates the risk level and
insurance cost for clients.

_Project №11
Name: Secured by NDA
Technologies: ReactNative, NextJS, node.js, Express, SCSS, postgreSQL, Canvas
Year: 2022
Rank: Senior
Description: A taxi aggregator similar to existing ones, featuring car booking and pre-booking, trips, and
promotional codes.

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_Project №12
Name: Secured by NDA
Technologies: Kotlin, NextJS, Node.js, Express, SCSS, PostgreSQL, Canvas, Web socket
Year: 2023-2024
Rank: Senior
Description: A POS system for sales supporting multiple establishments, integrated with PRRO systems
(connection with the tax authorities), as well as barcode scanning, and working with thermal printers by
developing a wrapper for web applications in Java/Kotlin. It includes management and accounting of
employee salaries based on a fixed rate or depending on the number of hours worked. The system also
supports working with technical cards and finished goods, inventory management, and management of
goods and ingredient supplies.

_Project №13
Name: Secured by NDA
Technologies: TypeScript, Next.js, NestJS, TypeORM, React, Zustand, PostgreSQL, AWS S3, AWS
ECS, Nginx, Turf.js, FFmpeg, WebSocket
Year: 2023-2025
Rank: Senior
Description: A digital signage management and rendering system for advertising video content on
digital displays, operating in real-time. The project includes integration with AWS for video storage and
processing, as well as an automated rendering solution based on FFmpeg. It supports SSE and
WebSocket for real-time content updates on devices. The system allows users to manage advertising
campaigns, schedule content displays, and analyze viewership statistics and interactions.

_Project №14
Name: Photostudio CRM
Technologies: TypeScript, React, MongoDB, AWS Amplify, AWS ECS, Nginx, Python
Year: 2025-2026
Rank: Senior full-stack
Description: An internal admin and call-center platform for a photography & beauty studio business,
used by agents and coordinators to manage the full customer booking lifecycle in real time. The system
integrates with Square for appointment scheduling, catalog/services, payments and admin OAuth
authentication, and with Twilio Voice for handling inbound/outbound calls and missed-call logging directly
in the browser. It provides tools for booking creation and rescheduling, checkout and deposit handling,
photo-viewing sessions, and studio daily planning. Dedicated modules cover capacity management
(photographer and staff scheduling with Square override-hours), lead routing of consultants across cities,
offers configuration, and analytics dashboards (CMT and cancellation statistics with CSV export). Built
with React, TypeScript, React Query and Tailwind/Flowbite, with Sentry monitoring and deployment to
AWS (S3 + CloudFront).

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>_ Open Source Contributions:
1. ol-owm — Weather Visualization for OpenLayers & Leaflet
https://www.npmjs.com/package/ol-owm
Developed a TypeScript library for visualizing weather layers and wind animation on
OpenLayers and Leaflet maps. Supports OpenWeatherMap API, dynamic layer switching,
legends, and custom styling. Published and maintained as an open-source NPM package.

2. geo-hunter — Aerial Target Interception Calculator
https://www.npmjs.com/package/geo-hunter
Developed a Node.js library in TypeScript to compute interception points for aerial targets
based on real-time geospatial parameters. The package calculates optimal interception
coordinates considering factors like speed, direction, altitude, and operational range, utilizing
EPSG:4326 geospatial standards.

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>_ My production projects:

Rentai Glass — Real estate photo analyzer
AI service that processes property images to detect furniture, amenities, room types, and ad
manipulation. Uses ONNX models (DINOv2), vector search (pgvector), and image
classification for real-time feedback. (https://glass.rentai.homes/)

Browser MMORPG — https://arena17.online/

Password manager — https://lostpass.org

AntiAFK — https://shakemaster.online/

AI photographer (stage) — https://staging.glowme.studio/

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