Особисті дані приховані

Andrew Steshenko
Full-Stack Software Engineer
Kyiv, Ukraine | Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
Email: [відкрити контакти](див. вище в блоці «контактна інформація») | GitHub: github.com/steshweb | LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)

Professional Summary
Full-Stack Software Engineer specializing in building scalable web applications using TypeScript, React, Next.js,
Node.js, and NestJS.
Experienced in developing modern frontend applications and scalable backend services, delivering production-ready
features from architecture design through deployment and maintenance.
Skilled in designing REST APIs, working with SQL and NoSQL databases, integrating payment providers, cloud
services, authentication systems, and third-party APIs.
Passionate about clean architecture, performance optimization, and maintainable software. Daily user of AI-assisted
development tools including OpenAI, Claude, and Codex for architecture analysis, refactoring, code generation, and
efficient work with large technical documentation using Retrieval-Augmented Generation (RAG) workflows.

Core Skills
Languages: TypeScript • JavaScript
Frontend: React • Next.js • Redux Toolkit • RTK Query • HTML • CSS • Tailwind

Backend: Node.js • NestJS • Express • REST API • gRPC • Kafka • WebSocket

Databases: PostgreSQL • Prisma • MongoDB • Redis • TypeORM • Sequelize
DevOps: Docker • CI/CD • AWS • Render

Testing: Jest • Swagger

AI: Claude • Codex • Prompt Engineering • RAG

Professional Experience
Full-Stack Software Engineer
ArcticWeb | May 2025 - Present
• Develop full-stack applications from scratch, taking projects from architecture design through deployment and
long-term maintenance.
• Design application architecture, define project structure, organize modules, and make technical decisions focused
on scalability, maintainability, and long-term development.
• Build backend services using NestJS, designing REST APIs, implementing business logic, authentication systems,
third-party integrations, and database interactions.
• Develop frontend applications using React and Next.js, creating responsive user interfaces, implementing
SSR/SSG, and integrating client-side applications with backend services.
• Design and optimize database structures using PostgreSQL, MongoDB, Prisma, and Redis with a focus on
maintainability and application performance.
• Integrate third-party services including Stripe, PayPal, Google APIs, cloud services, authentication providers, and
AI-powered APIs.
• Implement payment processing, subscription management, webhooks, and asynchronous workflows for external
service integrations.

• Configure Docker environments and participate in deployment and CI/CD processes.
• Write unit and integration tests and maintain API documentation using Swagger.
• Conduct code reviews, participate in technical discussions, and help maintain development standards across
projects.
• Use Codex and Claude as part of an AI-first development workflow for code generation, debugging, architecture
analysis, refactoring, code review, and navigating large codebases, while validating AI-generated changes through
manual review and testing.

• Apply Retrieval-Augmented Generation (RAG) workflows to efficiently navigate technical documentation,
engineering standards, and large project documentation.

Full-Stack Developer
dZENcode | November 2023 - May 2025

• Developed and maintained backend functionality using NestJS and Express, modifying existing services and
implementing new REST API endpoints.
• Worked with Kafka and gRPC for communication between services in a microservice-based architecture.
• Implemented business logic, request processing, input validation, and error handling while maintaining the existing
application architecture.

• Worked with PostgreSQL and MongoDB using TypeORM, Sequelize, and Mongoose to manage database models,
migrations, and data access logic.
• Wrote SQL queries for complex data retrieval and performance optimization when required.
• Developed DTOs and used Validation Pipes to ensure reliable request validation across backend services.
• Participated in implementing new product features, delivering backend functionality and making the required
frontend changes to support business requirements.
• Maintained and extended an existing React application by implementing new UI features, fixing frontend issues,
and integrating client-side components with backend APIs.

• Used Redux Toolkit and RTK Query for state management and API integration within the existing React application.
• Contributed to the development and maintenance of React components, forms, and user interface elements within
the existing application architecture.

• Wrote and maintained unit, integration, and end-to-end tests using Jest, updating existing test suites alongside new
functionality.

• Used Docker and Docker Compose for local development, running application services, and testing environments.
• Collaborated with team members using Git throughout the development process, contributing to feature
implementation, bug fixes, and ongoing application maintenance.

Education
GoIT
Full-Stack Developer | 2022 - 2023

Languages
Ukrainian - Native
Russian - Native
English - Intermediate