Микола

MYKOLA SOTNICHENKO
Full-Stack Developer | TypeScript, React, NestJS, AI Assistants
Kyiv, Ukraine | Remote / Hybrid | [open contact info](look above in the "contact info" section)
GitHub: github.com/KolyaSotnichenko | LinkedIn: [open contact info](look above in the "contact info" section)

PROFILE
Full-Stack Developer with 4+ years of commercial experience in web applications, internal tools and AI-assisted workflows. Main stack: TypeScript,
React/Next.js, Node.js/NestJS, REST APIs, PostgreSQL, MongoDB, Docker, Kubernetes and Azure DevOps. In my current role I build backend and
frontend features, set up infrastructure, work with AI assistants/RAG-style solutions, and help business teams automate routine work.
HIGHLIGHTS
• Own features across frontend, backend, database layer, integrations and deployment.
• Build practical AI functionality: internal assistants, document search, RAG-style flows and multi-step agents.
• Configured Percona for MongoDB and worked with MongoDB setup/maintenance in backend projects.
• Mentor a junior developer through code reviews, task decomposition and implementation guidance.
TECHNICAL SKILLS
Frontend React.js, Next.js, TypeScript, JavaScript, React Hooks, React Query, Zustand, React Hook Form, Tailwind CSS, HTML5, CSS3
Backend Node.js, NestJS, REST API design, Swagger, TypeORM, Prisma, Mongoose, class-validator, Zod, Yup
Databases PostgreSQL, MySQL, MongoDB, Percona for MongoDB
AI / Automation Azure OpenAI, OpenAI API, Azure AI Search, LangChain, LangGraph, RAG, AI assistants, n8n
Cloud / DevOps Azure, Azure DevOps, Azure Pipelines, Docker, Kubernetes, CI/CD, TLS-enabled self-hosting
Other Git, Jest basics, software architecture fundamentals, performance optimization, custom hooks

EXPERIENCE
Full-Stack Developer with AI Focus - MHP | Oct 2023 - Present | Remote / Kyiv, Ukraine
• Develop full-stack applications with NestJS, Next.js, PostgreSQL and MongoDB, focusing on clean APIs, maintainable code and reliable delivery.
• Build AI assistants and agent-like workflows with LangChain, LangGraph, Azure OpenAI and Azure AI Search for internal business use cases.
• Configure and support infrastructure with Docker, Kubernetes, TLS and Azure DevOps CI/CD pipelines.
• Worked with MongoDB environments and configured Percona for MongoDB as part of database setup and operational tasks.
• Automate internal processes and integrations with n8n, reducing repetitive manual work for non-technical teams.
Front-End Developer - Siema | May 2023 - Aug 2023 | Remote / Kyiv, Ukraine
• Built responsive landing pages and CRM-related frontend components using React, TypeScript, Tailwind CSS and Axios.
• Integrated REST APIs and improved reuse through custom hooks and component-level abstractions.
Front-End Developer - Level99 | Feb 2022 - Jul 2022 | Remote / Kyiv, Ukraine
• Implemented UI components and dashboard screens for business platforms using React, Zustand, Tailwind CSS and REST APIs.
• Worked on component structure, state management and consistent design-system usage.
Junior Front-End Developer - N-Six | Nov 2020 - Nov 2021 | Ukraine / Remote
• Built UI components and landing pages with React, JavaScript, Tailwind CSS, HTML and CSS.
• Participated in code reviews and collaborated with senior developers on production team projects.
SELECTED ENGINEERING WORK
• Designed RAG pipelines with Azure SQL Database, Blob storage, Azure AI Search, Azure OpenAI embeddings and source-grounded answer
generation.
• Built LangGraph.js agent workflows for document-heavy scenarios, including PDF/DOCX processing and assistant-style interaction patterns.
CERTIFICATIONS
• AI Fluency Framework & Foundations - Anthropic, issued Aug 2025. Verification: verify.skilljar.com/c/j5gva4sne4rc
• Building Ambient Agents with LangGraph - LangChain Academy, issued Aug 2025. Certificate: academy.langchain.com/certificates/7gnziuwmlu
LANGUAGES & PREFERENCES
• Ukrainian - Native; English - B1 / Intermediate.
• Open to Full-time, Part-time and Freelance roles. Preferred format: Remote or Hybrid.