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Nazarii – AWS, Angular, Microsoft Azure, experts in Lemon.io

Nazarii

From Ukraine (UTC+3)flag

Full-stack Web Developer|Senior
Lemon.io stats
2
projects done
440
hours worked

Nazarii – AWS, Angular, Microsoft Azure

Nazarii is a seasoned Full-stack Engineer with over 9 years of experience building, scaling, and leading high-impact technical projects. His expertise spans the entire development lifecycle—from orchestrating AI agents with Semantic Kernel to architecting real-time payment platforms and enterprise-grade .NET/Angular systems. With a deep command of Azure, AWS, and Terraform, Nazarii is comfortable with DevOps setup. He has built MVPs and scaled products, leading teams from prototype to production. During his service in the Ukrainian Armed Forces, he developed a production system that remains operational today—a testament to his ability to deliver mission-critical software under the most demanding conditions imaginable.

9 years of commercial experience in
Accounting
Administration
AI
Analytics
Communications
Construction
Consumer services
E-commerce
Information services
Social services
Transportation
Main technologies
AWS
3 years
Angular
3 years
Microsoft Azure
5 years
.NET
9 years
Additional skills
JavaScript
Golang
Azure DevOps
Python
Stripe API
ADO.NET
ASP.NET MVC
Postman
ASP.NET Web API
Microsoft SQL Server
DynamoDB
PostgreSQL
AI
Cloud Architecture
Design system
AWS Lambda
Terraform
.NET Core
GraphQL
React
Testimonials
#37494466953C# developer for a fitness app

"Interview prep conducted

Nazarii is incredibly pleasant to talk to and very knowledgeable as a developer. Knows how to introduce his expertise and ask the right questions. No more preps needed."

Kate BulezaLemon.io Matching Team
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Experience Highlights

Senior Full-stack Engineer
Nov 2022 - Ongoing3 years 2 months
Project Overview

The project involves the development of a translation platform that allows users to upload and translate documents from their original language into any target language. The platform is designed to support various file formats, ensuring a seamless and user-friendly experience for individuals or businesses needing fast and accurate document translation. Key features include automatic language detection, multiple output formats, and integration with machine translation technologies to provide efficient and scalable solutions.

Responsibilities:
  • Initiated and led the project from scratch;
  • Participated in architecture design meetings to define system structure and key technical decisions;
  • Designed and implemented the DevOps infrastructure to support deployment, scalability, and monitoring;
  • Set up CI/CD pipelines to streamline development and release processes;
  • Collaborated with stakeholders to gather requirements and align technical solutions with business goals;
  • Ensured code quality and maintainability by establishing project standards.
Project Tech stack:
.NET
Azure DevOps
Microsoft Azure
AWS
AWS Lambda
PostgreSQL
DynamoDB
Design system
Cloud Architecture
AI
Senior Back-end Developer
Sep 2025 - Dec 20253 months
Project Overview

Noncommercial startup, for all range of people, to help them navigate social help options. Mental health facilitator.

Responsibilities:
  • Designed and implemented an AI-powered agent system using Microsoft Semantic Kernel, orchestrating multiple specialized agents with rolebased task delegation and plugin extensibility;
  • Built a dynamic GraphQL query generator that translated natural language user intents into optimized GraphQL operations at runtime, eliminating the need for hardcoded queries;
  • Integrated a RAG (Retrieval-Augmented Generation) pipeline with vector search and document ingestion to ground AI outputs in domain-specific knowledge;
  • Architected multi-agent coordination framework with memory management, context sharing, and adaptive response strategies.
Project Tech stack:
.NET
GraphQL
AI agent development
Azure Functions
Senior Full-stack Engineer
Apr 2025 - Dec 20258 months
Project Overview

Fire safety inspection application

Responsibilities:
  • Developed, and maintained a mission-critical offline-capable inspection application;
  • Implemented Azure AD / Microsoft OAuth Single Sign-On with per-district enforcement, account linking flows;
  • Resolved multi-stage SSO redirect issues across several production hotfix cycles, enabling secure passwordless login for enterprise clients;
  • Migrated to latest .NET Framework version from deprecated 4.5;
  • Architected an extensible validation system with repository/service/rule pattern and DI;
  • Migrated stored procedures to EF Core, established patterns for known EF Core translation pitfalls.
Project Tech stack:
ADO.NET
ASP.NET MVC
Knockout.js
React
Microsoft SQL Server
Internet Information Services
Tech Lead, Senior Back-end Developer
Jan 2024 - Aug 20251 year 7 months
Project Overview

A startup for people to connect and help each other by checking what is inside the store and where you can find it.

Responsibilities:
  • Created back-end architecture;
  • Implemented advanced full-text search;
  • Wrote unit, integration, and e2e tests;
  • Integrated with different providers.
  • Managed communication with Stripe support regarding complex escrow-like flow.
Project Tech stack:
.NET Core
Stripe API
Azure DevOps
Microsoft Azure
PostgreSQL
Senior Full-stack Engineer
Sep 2021 - Mar 20226 months
Project Overview

A transportation management solution developed for one of the largest TMS platforms in the U.S. market. The product was built by a Ukrainian startup and includes a mobile application for drivers and a web-based admin panel for management. The system helps drivers track their daily activities, manage their schedules, and remain compliant with U.S. Department of Transportation regulations. It streamlines communication between drivers and dispatchers while offering real-time visibility into routes, logs, and operational data.

Responsibilities:
  • Designed and implemented front-end and back-end architecture to support scalability and maintainability of the platform;
  • Redesigned the existing database structure to ensure better performance and prepare the project for long-term growth;
  • Led Scrum ceremonies and took on Scrum Master responsibilities to improve team velocity and collaboration;
  • Refactored and redesigned the legacy front-end codebase to enhance usability, performance, and code consistency.
Project Tech stack:
ADO.NET
ASP.NET MVC
ASP.NET Web API
JavaScript
Microsoft SQL Server
Postman
Angular
Lead Developer
Jun 2021 - Aug 20212 months
Project Overview

The project focused on building a custom Content Management System to support the e-commerce needs of a professional lighting tools manufacturer. The CMS enabled efficient management of a large product catalog, multilingual content, and media assets. It was built for seamless integration with the existing platform, ensuring scalability, performance, and an improved content workflow for global teams.

Responsibilities:
  • Implemented an advanced full-text search functionality to enhance data discoverability and user experience;
  • Debugged and resolved complex application issues, improving system stability and performance;
  • Redesigned the existing front-end architecture and UI components, leading to a more modern, user-friendly interface and better maintainability.
Project Tech stack:
.NET
ADO.NET
ASP.NET MVC
Junior Full-stack Developer
Dec 2016 - Dec 20204 years
Project Overview

A system designed to track the condition and usage status of industrial tools for technicians and B2B clients. The platform enables real-time monitoring of tool availability, maintenance schedules, and operational status. It supports better planning and decision-making by providing accurate data on the tool lifecycle, reducing downtime, and improving overall efficiency in industrial environments.

Responsibilities:
  • Developed a customizable tool to adapt actions based on company region specifications;
  • Mentored new team members to support onboarding and integration;
  • Refactored and improved a legacy codebase to enhance maintainability and performance;
  • Coordinated and managed feature rollouts across multiple global regions.
Project Tech stack:
.NET
Windows Presentation Foundation (WPF)
ADO.NET
Angular.js

Languages

Ukrainian
Advanced
English
Advanced

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