Gleb

GLEB KONONENKO
FULL-STACK SOFTWARE ENGINEER
Web · Mobile · Backend · AI-Native Development

SUMMARY CONTACT

Dynamic software engineer with over 4 years of experience building
[відкрити контакти](див. вище в блоці «контактна інформація»)
production web, mobile, and backend applications across TravelTech, FinTech,
e-commerce, and custom business solutions. [відкрити контакти](див. вище в блоці «контактна інформація»)

Remote
Experienced in delivering end-to-end features using Flutter, React, Node.js,
and TypeScript — from responsive interfaces, state management, and native LinkedIn
mobile integrations to REST APIs, databases, background jobs, payment
workflows, and third-party services. Github

Developed and delivered numerous freelance projects, including e-commerce SKILLS
platforms, corporate websites, landing pages, dashboards, CRM systems, admin
panels, and internal business tools. Languages
JavaScript & TypeScript
Practice spec-driven and AI-native development using multiple LLMs and
Dart
coordinated teams of specialized AI agents for architecture planning,
implementation, testing, debugging, code review, security analysis, refactoring, Frontend
and technical documentation. HTML5 & CSS3
React.js & React Ecosystem
Strong focus on clean architecture, maintainable code, automated testing,
production reliability, and effective collaboration with product, design, Navigation & Routing
development, and QA teams. Responsive Design
State Management

WORK EXPERIENCE UI/UX Implementation
Form Handling & Validation
tict (AI & TravelTech company) October 2023 – Present
Unit & Integration Testing
Mobile Application Developer/Software Engineer
API Integration
Develop and maintain end-to-end features for an AI-powered travel
platform across Flutter mobile applications and Node.js/TypeScript Mobile
backend services. Flutter & Flutter Ecosystem
Build cross-platform mobile functionality using Flutter, Dart,
Bloc/Cubit
Bloc/Cubit, Dio, local caching, deep linking, and native iOS and
Android integrations. Native iOS and Android
Design and implement RESTful API endpoints, application use cases, Integrations
domain models, repositories, validation schemas, and database
Local Caching
access layers.
Work with MongoDB, PostgreSQL, Redis, and Elasticsearch to support Backend
travel planning, booking, user preferences, search, and background- API Design & Endpoints
processing workflows. Development
Developed scheduled backend jobs for upcoming-trip reminders, in-
trip notifications, and user re-engagement, using distributed locks and Node.js & Express.js
duplicate-delivery protection. Validation & Authorization
Contributed to booking and payment workflows involving Stripe and Background Jobs & Caching
external providers.
Rate Limiting & API
Collaborated closely with product owners to deliver high-quality
features in iterative sprints. Performance Optimization
Maintained code quality through reviews and refactoring. Databases & Search
Expanded capabilities to full-stack development by designing,
MongoDB & PostgreSQL
developing, and deploying robust RESTful API endpoints, ensuring
seamless frontend-backend integration. Redis & Elasticsearch

Participated in backend architecture and database-structure planning Testing & Debugging
while collaborating with team of 10 people - developers, designers, Vitest
product owners, and QA engineers. Flutter Test
Wrote unit and integration tests for both Flutter and Node.js
Unit Testing
functionality, covering business logic, APIs, scheduled jobs, database
Integration Testing
queries, partial failures, and edge cases.
Test-Driven Development
Managed end-to-end iOS and Android release processes, including Deployment and Tools
production builds, code signing, certificates and provisioning profiles, Git
App Store Connect and Google Play Console configuration, store Docker & CI/CD
submissions, and release updates. App Store Connect & Google
Leveraged AI-assisted development (LLM prompt engineering) to Play Console
accelerate boilerplate code generation, automate unit testing, and iOS and Android Release
perform legacy code refactoring, boosting personal feature delivery Management
speed. Development Practices
Work in a spec-driven development process, translating product Spec-Driven Development
requirements, technical specifications, API contracts, and acceptance Agile
criteria into production-ready features. Code Review
Use multi-agent AI development workflows with specialized agents for Automated Testing
architecture planning, test-first implementation, coding, verification, Technical Documentation
code review, security analysis, refactoring, and documentation.
AI-Native Development
Work with multiple LLMs and AI development environments, selecting
AI-Assisted Software
models and tools based on task complexity, context requirements,
Engineering
quality, speed, and cost.
Multi-Agent Development
Coordinate parallel AI-assisted tasks using structured specifications,
Workflows
isolated Git worktrees, reusable prompts, project knowledge bases,
LLM Orchestration
verification gates, and technical handoffs.
Agent-Based Planning
OlyPay (FinTech company) Context Management
Structured Agent Handoffs
Front-end Engineer January 2022 – March 2023
Knowledge-Base-Assisted
Developed reusable UI components, ensuring consistent design and Code Analysis
behavior across different product modules.
Built responsive user interfaces and implemented product features LANGUAGE
using modern JavaScript and React.
Integrated complex APIs, including payment systems, authentication, English: Upper-Intermediate
and user-account flows. Ukrainian: Native
Collaborated with backend engineers to define API contracts and Russian: Native
ensure reliable frontend-backend integration.
Optimized the performance of key pages, reducing load times and
improving the overall user experience.
Improved application maintainability through component refactoring
and reusable development patterns.
Participated in code reviews and introduced best practices for code
quality, scalability, and maintainability.
Worked closely with product, design, and QA teams in an Agile
development environment.

Freelance/Contract
Software Engineer/Full-Stack Engineer January 2022 – Present

Designed, developed, and delivered numerous full-stack projects,
including e-commerce platforms, landing pages, corporate websites,
dashboards, CRM systems, admin panels, and custom internal tools.
Managed the complete project lifecycle from requirements gathering
and technical planning to development, deployment, maintenance,
and client support.
Built responsive and accessible user interfaces using React,
JavaScript, TypeScript, HTML, and CSS.

Developed backend services, REST APIs, authentication flows,
business logic, database models, and third-party integrations using
Node.js and TypeScript.
Implemented e-commerce functionality including product catalogs,
shopping carts, checkout flows, payment integrations, order
management, and administrative interfaces.
Created dashboards and CRM interfaces with role-based access,
filtering, reporting, workflow management, and customer-data
functionality.
Developed conversion-focused landing pages and corporate
websites with attention to responsive design, performance, SEO,
usability, and cross-browser compatibility.
Integrated payment providers, analytics platforms, email services,
authentication systems, content-management solutions, and external
APIs.
Translated client requirements and business goals into technical
solutions, independently selecting architecture, technologies, and
implementation strategies.
Deployed and maintained applications, configured production
environments, resolved issues, and delivered iterative improvements
based on client feedback.
Created reusable components and modular solutions to reduce
development time and maintain consistent quality across different
projects.
Used AI-assisted development for research, prototyping,
implementation, testing, debugging, refactoring, and documentation.