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OLENA DEMIANENKO
JUNIOR FULL-STACK DEVELOPER
Kyiv, Ukraine | Linkedin | Github | Telegram | Gmail

SUMMARY

Full-stack developer with hands-on experience in building scalable web
applications using Next.js, TypeScript, Node.js, and NestJS. Proficient in
integrating AI tools and designing robust database architectures. Skilled
in cross-functional team collaboration to deliver high-quality products
that drive business value.

PROJECTS

TECHNICAL SKILLS Portfolio Github
Frontend: [Next.js, TypeScript, SCSS, Canva-effects, 3D-animation] | Oct 2026
React, Redux, Next.js, AI-Job-Apply Github
JavaScript, TypeScript, Tailwind,
[LangGraph, LangChain, Google Sheets, NestJS, TS] |Oct 2026
SCSS, Material-UI, StoryBook
AI-driven backend application that streamlines job application routines
Backend: by 90% using AI matching, intelligent company research, and custom
Node.js, NestJS, Express.js, cover letter/PDF generation.
Python, FastAPI AI-Video-Guide Github
Database & Cloud: [AI, Next.js, Python, FastAPI, Tailwind] |Oct 2026
PostgreSQL, Prisma, Firebase Web app that automatically generates step-by-step guides from video
MongoDB recordings using (Gemini / Groq), optimizing documentation workflows
AI & Tools: by 80%.
LangChain, LangGraph, Git,
AlterEgo Github
Docker, Swagger, Postman
[AI, Stripe, Next.js, TS, NestJS, JWT, PostgreSQL] |Sep 2026
AI-Assisted Dev: E-commerce application with an integrated Admin Dashboard (CRM).
Cursor, Claude Code, Features AI, Stripe payments ‘and shipping data via Nova Poshta.
Antigravity AI-CRM
[AI, Next.js, NestJS, TS, StoryBook, Prisma, PostgreSQL] | Jun 2026
SOFT SKILLS Team project (Full-stack developer). Enterprise CRM monorepo
Self-Management, Adaptability, featuring AI integration, automated cron workflows.
Continuous Learning,

CERTIFICATES WORK EXPERIENCE

details are available in my ElifTech (Internship) | Full-stack Engineer Apr – Jun 2026
Portfolio Achievement:
Designed database architecture for a Logistics AI CRM (Next.js,
NestJS, Prisma ORM), reducing query latency by 25% with zero-
EDUCATION downtime migrations.
IT School GoIT Automated platform operations by implementing scheduled cron
Full-Stack Developer workflows, robust audit logging, and version-controlled AI prompts,
Nov 2023 – Oct 2024 optimizing processes by 60%.

LANGUAGES TetaLab (Internship) | Full-stack Engineer Dec 2025 – Feb 2026
Achievement:
English: Upper-Intermediate Engineered a full-stack web app (NestJS, PostgreSQL, Firebase) from
Ukrainian: Native scratch, building 15+ API endpoints and RBAC security independently.
Accelerated team delivery by 20% as Scrum Master and successfully
delivered 2 stakeholder project presentations.