Volodymyr P. — Full-Stack Engineer

Expertise in Full Stack Web, AI and Machine Learning.

Last verified on December, 2025

Core Skills

Bio Summary

- Full-Stack Engineer with 10 years of experience building and scaling web and SaaS products across fintech, edtech, martech, crypto, energy, and AI-driven domains.
- Skilled in JavaScript, TypeScript, and Python, with hands-on experience in frontend development using React, Next.js, and Vue.js, and backend development with Node.js, NestJS, Express, and Python-based frameworks.
- Designed and implemented system architectures for complex platforms, including distributed systems, microservices, real-time applications, and API-driven products with PostgreSQL, MongoDB, Redis, ClickHouse, and Elasticsearch.
- Led full-cycle development of high-load platforms such as crypto trading systems, communication automation tools, educational video platforms, and SaaS products, from requirements and architecture to production launch and scaling.
- Integrated AI and machine learning components into production systems using OpenAI APIs, LangChain, FAISS, PyTorch, and other AI tooling for personalization, automation, and content generation.
- Built and maintained infrastructure using Docker, Kubernetes, Terraform, and CI/CD pipelines, working extensively with AWS and Google Cloud environments.
- Experienced in technical leadership, including frontend architecture ownership, mentoring engineers, hiring, and organizing engineering teams across multiple projects.

Technical Skills

Programming Languages	C#, Go, Java, JavaScript, PHP, Python, TypeScript
AI & Machine Learning	AI, Anthropic, Faiss, LangChain, LDA (Latent Dirichlet Allocation), OpenAI, Pinecone, PyTorch, TensorFlow
JavaScript Frameworks	Angular, Ext JS, NestJS, Next.js, Node.js, React, tRPC, Vue.js
JavaScript Libraries and Tools	Apollo, Electron, Ethers.js, Expo, mui, React Native, Strapi, Web3.js
Mobile Frameworks and Libraries	Crashlytics
.NET Platform	EF Core, .NET
Go Frameworks	Fiber
Python Libraries and Tools	pytest, PyTorch, TensorFlow
Java Frameworks	Spring Boot
UI Frameworks, Libraries, and Browsers	Tailwind CSS, UI
Security	Auth0, RBAC
Databases & Management Systems / ORM	AWS ElasticSearch, Clickhouse, MongoDB, MySQL, PostgreSQL, Prisma, Redis, SQLAlchemy, Typeorm
Cloud Platforms, Services & Computing	AWS, GCP, Vercel
Amazon Web Services	AWS CloudFront, AWS ElasticSearch
Azure Cloud Services	Azure Key Vault
SDK / API and Integrations	API, GraphQL, JWT, OAuth, RESTful API
Message/Queue/Task Brokers	Celery, Kafka, RabbitMQ
Deployment, CI/CD & Administration	CI/CD, GitLab CI, Jenkins
Platforms	Contentful, SAAS
QA, Test Automation, Security	Cypress, Jest, Playwright, pytest, Sanity Testing
Virtualization, Containers and Orchestration	Docker, Kubernetes, Terraform
BlockChain and Decentralized Software	Ethers.js, Hardhat, Web3
Methodologies, Paradigms and Patterns	FDD, Flows, SOLID
Version Control	Github Actions
Mail / Network Protocols / Data transfer	GRPC, JWT, WebSockets
Project Management & Administration	MVP
Logging and Monitoring	Prometheus, Sentry
UI/UX/Wireframing	UX

Work Experience

Lead Full-Stack Engineer & Product Architect, PlagTV (EdTech, Language Learning, AI)

Duration: Feb 2025 - Sep 2025

Summary:Led product architecture and full-stack development for an educational video platform for language learners, owning end-to-end delivery from requirements to production launch.

Key Responsibilities:

Designed system architecture from raw requirements covering UX/UI, data layer, backend services, infrastructure, CI/CD, and AI personalization module;
Built learning features with video playback, interactive subtitles, vocabulary system, and adaptive AI adjusting to learner progress;
Organized hiring and onboarded a 4-engineer team with documentation and architecture maps;
Delivered production-ready platform for market launch and scaling.

Technologies:React, Next.js, Vue.js, Node.js, NestJS, TypeScript, C#, .NET, Python, Anthropic, LangChain, FAISS, MongoDB, PostgreSQL, Redis, Docker, Kubernetes, Google Cloud.

Senior Full-Stack Engineer & Frontend Architect, Darkbot.io (FinTech, Crypto Trading, ML)

Duration: Jul 2024 - Jan 2025

Summary:Joined to elevate engineering standards, stabilize the platform, and establish reliable development processes for a crypto trading system.

Key Responsibilities:

Rebuilt frontend architecture with modular structure, centralized state management, and type safety;
Removed architectural bottlenecks and fixed backend failures in trading execution and account management;
Established CI/CD pipelines, automated testing, and code review standards;
Enabled regular releases and onboarding of first users.

Technologies:React, Next.js, TypeScript, PHP, Laravel, MySQL, Redis, Kafka, RabbitMQ, Docker, Terraform, AWS.

Technical Consultant & Product Architect, Emotive.io (MarTech, E-commerce)

Duration: May 2024 - Mar 2025

Summary:Provided technical consultation and product strategy guidance for a communication-automation platform for e-commerce and DTC brands.

Key Responsibilities:

Defined modernization strategy and product evolution roadmap;
Mentored junior and mid-level engineers to improve engineering standards;
Restructured engineering organization and participated in technical hiring;
Resolved critical platform issues and stabilized operations during high-load events.

Senior Full-Stack Engineer & Engineering Lead, Emotive.io (MarTech, E-commerce)

Duration: Oct 2020 - May 2024

Summary:Owned frontend architecture and full-stack engineering, driving platform transformation and building engineering organization from the ground up.

Key Responsibilities:

Unified fragmented micro-applications into a single platform;
Migrated legacy monolithic system to microservice architecture;
Built production-ready chat system, AI support assistant, and operator console;
Hired and structured frontend, backend, and QA teams;
Stabilized development and delivered product improvements.

Technologies:React, GraphQL (Apollo), TypeScript, Node.js, Python, Django, Flask, OpenAI API, LangChain, PyTorch, PostgreSQL, Redis, Kafka, ClickHouse, Elasticsearch, Docker, Terraform, AWS.

Lead Frontend Engineer, CoinFlex (FinTech, Crypto Trading)

Duration: Jan 2020 - Oct 2020

Summary:Built UI architecture from scratch and led frontend development for a high-load crypto trading platform.

Key Responsibilities:

Built entire UI architecture delivering high-performance real-time trading interface;
Implemented ultra-fast real-time data flows handling thousands of updates per second;
Contributed to backend code and API integration;
Delivered production-ready trading environment comparable to major platforms.

Technologies:React, GraphQL (Relay), TypeScript, Node.js, Java, Spring Boot, Python, PostgreSQL, Redis, Kafka, Elasticsearch, Docker, Kubernetes, Grafana, AWS.

Founding Full-Stack Engineer & Acting CTO, FinRev (FinTech, Energy, Web3)

Duration: Apr 2019 - Dec 2019

Summary:Designed and built MVP of a tokenized energy exchange platform, establishing system architecture and engineering organization from scratch.

Key Responsibilities:

Designed and built MVP covering smart contracts, token marketplace, exchange mechanics, and energy accounting flow;
Created exchange dashboard and integrated wallet functions;
Established R&D office in Kyiv and conducted technical hiring;
Delivered production-ready MVP for pilot tests.

Technologies:Vue.js, TypeScript, Node.js, Python, Go, web3.js, Ethereum, Polygon, Solidity, Docker, Kubernetes, Terraform, Google Cloud.

Lead Frontend Engineer & Product Architect, Nimses (Social Media, AdTech, FinTech, Web3)

Duration: Jun 2017 - Mar 2019

Summary:Led frontend architecture and development across multiple platforms within a social-media and blockchain ecosystem.

Key Responsibilities:

Established frontend architecture standards across distributed teams;
Built and launched Exchange and Ads platforms;
Led 15+ engineers and scaled organization by hiring 25+ senior engineers;
Integrated Exchange, Ads, and Music platforms into a unified ecosystem.

Technologies:React, GraphQL (Apollo), TypeScript, Node.js, Go, PostgreSQL, Kafka, ClickHouse, Elasticsearch, Docker, Kubernetes, AWS.

Full-Stack Engineer, AVyS Wholesale LDA (Telecom, VoIP)

Duration: Mar 2015 - May 2017

Summary:Architected and developed end-to-end SaaS platform for virtual PBX systems from prototype to production.

Key Responsibilities:

Architected and developed SSR-based platform, dashboard, and REST APIs;
Built Visual Flow Builder for drag-and-drop IVR construction;
Defined technology stack and managed deployment pipelines;
Led product growth to first 500 users.

Technologies:React, Node.js, Express, MongoDB, AWS.

Education

Master's degree, Economic Cybernetic,Taras Shevchenko National University of Kyiv (2012 - 2014).
Bachelor's degree, Economic Cybernetic,Taras Shevchenko National University of Kyiv (2008 - 2012).

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