Roman

Roman Hranovskyi
F u ll- S ta c k D e v e lo p e r

Phone Email Location
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») Ukraine, Dnipro

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About Me Skills
Extensive experience building and maintaining RESTful APIs using NestJS,
I am a passionate Full-Stack Developer
experience with Express.js, documentation writing with Swagger
with nearly 3 years of experience building
modern web applications using NestJS, Hands-on experience with PostgreSQL (TypeORM) and MongoDB
Express, and React (TypeScript). (Mongoose)
Communicative, proactive, responsible, Real-time features using WebSockets
and always striving to learn new Developing seamless user interfaces using React and Material UI (MUI),
technologies and improve my skills. React Admin. Experience with Tailwind CSS, Redux, Next.js and Vue.js
Highly motivated to contribute to HTML, CSS, JavaScript, TypeScript
impactful projects and grow within a Basic knowledge of Python
strong engineering team Experience configuring services in Google Cloud Console. Integration with
Google OAuth and YouTube API, Google Sheets API
Education Basic DevOps skills: working with remote Linux-based servers, service setup
and configuration, shell scripts
Puppeteer for web scraping and automated data extraction
Oles Honchar Dnipro National Integration with Kafka for messages exchange
University (2021 - 2025) Experience with AWS services including IAM, S3, EC2, SQS, SNS, RDS
Hands-on experience with Docker and containerization
Faculty of Applied Mathematics, Software
Basic experience with Firebase, including authentication and access control
Engineering, Bachelor’s degree
configuration
Zapier webhooks integration
Oles Honchar Dnipro National MinIO object storage (as AWS S3-like API)
University (2025 - 2026) Experience working with monolithic architectures and microservices-based
Faculty of Applied Mathematics, Software systems
Engineering, Master’s degree Integration with Prometheus, and Loki, setting up Grafana and Prometheus
Alerts for monitoring and observability

Languages Deployment to Fly.io
Git, GitHub, and GitLab. Building CI/CD pipelines using GitHub Actions and
GitLab CI (runners/workers), webhooks integration
Jira, Trello
English - Upper Intermediate
Ukrainian - Fluent
Experience
September 2023 -
Full Stack Developer at Diexp.tech
Interests nowadays
Completed an internship at the company and transitioned into a Full Stack
Developer role upon its completion. Worked on designing and building RESTful
Table tennis APIs, as well as implementing end-to-end features across both backend and
Board games frontend, with a primary focus on backend development. Collaborated closely
Travelling with frontend developers and PM in a team environment, actively participated in
code reviews, and provided backend-focused mentorship for an intern

Projects:
Platform for identifying potential leads
Designed and implemented RESTful API for the project, along with a separate
service responsible for collecting and processing relevant data from
industry-specific websites using Puppeteer or APIs
Developed an admin panel for reviewing and managing data generation
results
Implemented asynchronous request processing using AWS SQS to handle
data generation workflows
Implemented two-factor authentication for the platform
 Integrated Google OAuth to enable secure authorization for storing data in
Google Sheets for further processing
Added Zapier integration as an alternative automation flow for collecting
data and forwarding to external services

Volunteer Management System
Implemented the interaction logic between the admin panel (React Admin)
and backend using Firebase, including role-based access control (RBAC) to
manage permissions for specific actions within the system

Platform for a Construction Company
Implemented specific event-driven logic to handle user interactions with
Mapbox on frontend, enabling reactions to map-based actions

FoodTech Industry Platform
Contributed to improving the real-time user chat system using WebSockets
Implemented direct messaging (DM) functionality, enabling private user-to-
user communication within the platform

Music Distribution Platform
Implemented a bulk upload mechanism for audio files and images,
including processing and storing metadata from CSV files into the database,
creating a flexible alternative to manual item-by-item creation while
minimizing backend load
Contributed to the implementation of dynamic image resizing and
generation of optimized image copies, significantly improving page load
performance by more than 30%

Store Operations Management Platform
Designed and implemented RESTful API for the project, including JWT-based
authentication and RBAC
Optimized data import process from XML files, reducing processing time by
approximately 12x
Implemented file storage integration using S3-compatible object storage
Developed an efficient streaming-based JSON export mechanism to process
datasets while minimizing memory usage
Integrated Kafka-based message processing and publishing to enable
asynchronous communication between system components

Video Surveillance Platform
Designed and implemented an RTSP-based video ingestion and storage
pipeline using FFmpeg
Built a streaming delivery endpoint with FFmpeg, enabling time-based partial
playback, dynamic video concatenation, and downloadable video segments
for selected time ranges