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VASYL PELESHKO
Full-Stack Developer

Email: [открыть контакты](см. выше в блоке «контактная информация») | Telegram: @VasylPeleshko | Phone: [открыть контакты](см. выше в блоке «контактная информация»)

SUMMARY

Full Stack Developer with 2+ years of commercial experience building scalable web and mobile
applications, AI-powered features, and cloud-based solutions using TypeScript, NestJS, Node.js,
React, Next.js, and React Native. Experienced in designing backend architectures, REST APIs,
authentication systems, AI and third-party integrations, and cloud infrastructure. Proficient with
PostgreSQL, MySQL, MongoDB, DynamoDB, Firebase, AWS, Docker, and modern software
architecture principles. Delivered production-ready solutions across healthcare, workforce
management, and social media platforms, focusing on scalability, performance, maintainability,
and clean code.

KEY SKILLS

Backend: NestJS, Node.js, Express.js, Fastify, REST API, GraphQL, Socket.IO, JWT, Passport.js,
Multer, Bcrypt, Prisma, Sequelize, TypeORM, Mongoose
Frontend: React, Next.js, Angular, React Native, Redux Toolkit, Zustand, React Query, HTML5,
CSS3, SCSS/SASS, Tailwind CSS, Material UI, Ant Design, Framer Motion
Programming Languages: JavaScript, TypeScript, SQL
Databases: PostgreSQL, MySQL, MongoDB, MS SQL Server, Redis, DynamoDB, Firebase Firestore
Cloud & DevOps: Docker, AWS S3, Docker Compose, GitHub Actions, CI/CD, Heroku
AI & Integrations: OpenAI API (GPT-4, GPT-4o), Google Gemini API, Firebase AI Logic, AI
Automation, LLM Integrations, LangChain, Pinecone, Vector Databases, Whisper API, AI Content
Moderation, AI Summarization, Prompt Engineering
AI Developer Tools: Cursor, GitHub Copilot, ChatGPT, Claude, Gemini, Windsurf, Continue.dev,
Tabnine, TL;DV, Notion AI, Replit AI
Testing & API Tools: Jest, Supertest, React Testing Library, Cypress, Postman, Swagger/OpenAPI
Methodologies: Agile, Scrum, Kanban
Architecture & Design: OOP, SOLID Principles, Design Patterns, Clean Architecture, Hexagonal
Architecture, RESTful API Design, MVC Pattern, Repository Pattern, Client–Server Architecture,
Microservices Architecture, Event-Driven Architecture
Collaboration & Project Tools: Git, GitHub, GitLab, Jira, Confluence, Slack, Figma, Notion, Miro,
Trello

WORK EXPERIENCE

KEVYCH SOLUTIONS | Full Stack Developer June 2025 - June 2026
Project: Social Media Content Management & Scheduling Platform

Developed and maintained backend services using NestJS, Node.js, and Firebase Cloud
Functions for a social media management platform.
Implemented real-time data synchronization with Firestore and integrated Firebase
Authentication for secure user management.
 Developed mobile application features using React Native, including content scheduling,
publishing, and notification functionality.
Optimized backend architecture and application workflows to improve scalability,
performance, and maintainability.
Contributed to architecture design, feature planning, and end-to-end product development
within an Agile environment.
Integrated AI services into the platform to automate content analysis and moderation
workflows.
Developed a Gemini AI integration to automatically analyze uploaded videos, detecting
potential copyright infringement, AI-generated content, and compliance with platform
guidelines.
Built AI-powered automation pipelines that reduced manual moderation efforts and improved
content review efficiency.
Integrated the TikNeuron AI service to automatically generate TikTok content briefs and
recommendations based on video analysis.
Designed and implemented scalable third-party AI API integrations with robust error handling,
retries, and monitoring.
Technologies: NestJS, Node.js, TypeScript, React, React Native, Firebase, Firestore, Firebase
Authentication, Firebase Cloud Functions, Google Gemini API, TikNeuron API, BigQuery, RESTful
APIs, AI/LLM Integrations, Git, GitHub, Postman, Heroku, Agile/Scrum

Project: MicroManagement
Developed and maintained backend services using NestJS and Node.js for a mobile habit-
tracking application.
Designed REST APIs for journaling, habit tracking, calendar management, subscriptions, and
user settings.
Implemented secure authentication, user management, and cloud synchronization with
support for local and account-based storage.
Integrated Apple StoreKit for subscription lifecycle management, including trial activation,
purchase validation, and restore purchases.
Developed multilingual application support and scalable backend architecture for
internationalization.
Built notification and reminder services with configurable schedules and background
processing.
Optimized backend performance, database interactions, and application workflows to improve
scalability and maintainability.
Participated in architecture design, feature planning, and end-to-end product development
within an Agile environment.

Technologies: TypeScript, NestJS, Node.js, Firebase, Firestore, Firebase Authentication, Apple
Sign-In, Apple StoreKit, REST API, Redux Toolkit, i18next, Firebase Cloud Messaging (FCM), Heroku
Git, GitHub, Postman, Figma, Agile/Scrum

Project: Kaban
Developed and maintained a web-based workforce management platform using React and
Node.js.
Built an interactive calendar for tracking employee working hours, leave requests, and
attendance.
Developed dashboards with real-time statistics and reporting for workforce activity and
business performance.
 Implemented an interactive map displaying employees, clients, and job locations to improve
task coordination.
Built a week generator and scheduling system for creating and managing employee work plans.
Integrated AWS S3 for secure file storage and management of documents and media assets.
Developed REST APIs and optimized backend services to improve application performance,
scalability, and maintainability.
Collaborated with cross-functional teams on architecture design, feature planning, and Agile
software development.
Integrated OpenAI APIs to automate work schedule generation based on employee availability,
workload, and business requirements.
Developed AI-powered assistants for generating shift descriptions, task summaries, and
internal notes, reducing manual administrative work.

Technologies: React, Node.js, TypeScript, Nest.js, PostgreSQL, Prisma, JWT, Redis, Docker, AWS S3,
REST API, HTML5, SCSS, Git, GitHub, Postman, Jira, Agile/Scrum.

INCORA | Backend Developer January 2025 - now
Project: CRM System for Medical Clinic

Led the migration of a legacy Express.js monolith to a modular NestJS architecture,
significantly improving maintainability, scalability, and code organization.
Designed and developed REST APIs supporting patient management, appointment scheduling,
treatment workflows, and clinic operations.
Integrated the Health Gorilla FHIR API for secure synchronization of patient records,
appointments, practitioners, and clinical resources using HL7 FHIR standard
Implemented a hybrid data storage architecture using MySQL and DynamoDB to efficiently
support both transactional and high-volume workloads.
Refactored legacy business logic into reusable modules following Clean Architecture, SOLID
principles, and dependency injection patterns.
Developed AI-powered automation features using OpenAI APIs to generate clinical summaries,
assist with documentation, and streamline administrative workflows.
Optimized database performance, API response times, and backend workflows while
contributing to system architecture and future third-party integrations.

Technologies: NestJS, Node.js, Express.js, TypeScript, MySQL, DynamoDB, Prisma, Docker, AWS
(DynamoDB, S3), Health Gorilla API, OpenAI API, REST API, JWT, Swagger/OpenAPI, Git, GitHub,
Postman.

WISEVISION | Full Stack Developer March 2024 - December 2024
Project: Email Generation & Delivery Platform

Developed and maintained REST APIs and backend services using NestJS within a
microservices-based email automation platform.
Built responsive web interfaces with React and Next.js for email template management and
delivery workflows.
Designed and implemented MongoDB schemas and data models using Mongoose.
Developed a template-based email generation service with support for automated scheduled
delivery.
Contributed to platform scalability, maintainability, and feature development within a
microservices architecture.
Technologies: NestJS, Node.js, TypeScript, React, Next.js, MongoDB, Mongoose, Nodemailer
EDUCATION

Lviv Polytechnic National University
Institute of Computer Science and Information Technologies
Bachelor's Degree in Software Engineering | 2021 – 2025

CERTIFICATIONS

SoftServe IT Academy
Complete Full-Stack Developer Course

LANGUAGES

English — Upper-Intermediate (B2)

Ukrainian — Native