Yuliia Kovalets | Senior Full-Stack Developer

01

About

Experienced across the full product lifecycle, from MVP development to production-grade solutions, in both product companies and outsourcing teams.

Full-stack developer with 5+ years of experience building scalable web applications: responsive front-end interfaces, backend architecture, and third-party integrations.

A background in Computer Technologies provides a strong foundation in software engineering, system design, and problem solving.

role: Senior Full-Stack Developer
experience: 5+ years
education: MSc, Computer Technologies
focus: Web apps · microservices · AI
status: Open to projects

02

What I do

2.1

Front-End Engineering

Responsive, pixel-perfect interfaces with React, Next.js, and Angular, from Figma handoff to state-heavy SPAs with Redux, RxJS, and NgRx.

2.2

Back-End & Microservices

APIs and services with Node.js, NestJS, and Python (Django, FastAPI): REST, GraphQL, WebSockets, and message-driven architectures with RabbitMQ and Kafka.

2.3

AI & LLM Features

LLM-powered functionality with OpenAI and Anthropic APIs, LangChain, and RAG, integrated into production systems.

2.4

Cloud, DevOps & Integrations

AWS deployments with Docker, Kubernetes, and CI/CD, plus Stripe, payment gateways, analytics, and third-party API integrations.

03

Experience

Feb 2026 — now

Senior Full-Stack Developer

Freelance

Delivering end-to-end web development services for international clients: architecture design, front-end and back-end implementation, AI/LLM feature integration, deployment, and ongoing support.

React · Next.js · Angular · TypeScript · Node.js · NestJS · Python · FastAPI · PostgreSQL · MongoDB · OpenAI/Anthropic APIs · LangChain · AWS · Docker

Jul 2023 — Feb 2026

Middle / Senior Full-Stack Developer

MaybeWorks

Developed and scaled web applications for international clients as part of dedicated development teams: designed backend architecture and APIs, built Python microservices and data processing pipelines, led feature delivery end-to-end, conducted code reviews, mentored junior developers, and worked directly with clients on requirements and technical solutions.

React · Next.js · Angular · TypeScript · Node.js · NestJS · Express · Python · Django · FastAPI · PostgreSQL · GraphQL · Redis · RabbitMQ · Docker · Kubernetes · AWS · CI/CD

May 2022 — Jun 2023

Full-Stack Developer

Genesis

Built and maintained full-stack features for high-traffic consumer products: developed REST APIs and backend services in Node.js and Python, integrated payment and analytics services, and optimized application performance.

React · Angular · TypeScript · Node.js · Express · Python · Flask · MongoDB · PostgreSQL · REST APIs · Docker

Mar 2021 — Apr 2022

Junior Front-End Developer

Ciklum

Built responsive UI components and single-page applications in Angular and React, collaborated with designers and back-end teams to deliver pixel-perfect interfaces.

Angular · RxJS · React · JavaScript/TypeScript · Redux · HTML5 · CSS3/SASS

04

Skills

Front-end: React · Next.js · Angular · TypeScript · JavaScript (ES6+) · Redux · RxJS · NgRx · HTML5 · CSS3/SASS · Tailwind CSS · Material UI · Responsive Design
Back-end: Node.js · NestJS · Express · Python · Django · FastAPI · Flask · REST APIs · GraphQL · WebSockets · Microservices
AI / ML: OpenAI API · Anthropic API · LangChain · LLM Integration · RAG · Prompt Engineering · Pandas · NumPy
Databases: PostgreSQL · MySQL · MongoDB · Redis · Elasticsearch · Prisma · TypeORM · SQLAlchemy
Cloud & DevOps: AWS (EC2, S3, Lambda, RDS) · Docker · Kubernetes · CI/CD (GitHub Actions, GitLab CI) · Nginx · Linux
Messaging & Integrations: RabbitMQ · Kafka · Stripe · Payment Gateways · Third-party API Integrations
Testing: Jest · Cypress · Pytest · Unit & Integration Testing · TDD
Practices & Tools: System Design · Clean Architecture · SOLID · Code Review · Agile/Scrum · Git · Jira · Figma

05

Education

Sep 2019 — Jan 2025

Master's Degree in Computer Technologies

West Ukrainian National University