Petr Shelomovskiy
Verified Expert in Engineering
C# Developer
Prague, Czech Republic
Toptal member since March 26, 2018
Petr is a professional .NET developer and IT consultant. He has worked on different projects for the past few years, including high-availability eCommerce solutions and SPA back ends featuring modern architectures and different SDMs. His academic background always helps him to find the best solution available.
Portfolio
Experience
- C# - 20 years
- Full-stack - 15 years
- .NET - 15 years
- Architecture - 15 years
- Angular - 10 years
- .NET Core - 10 years
- Azure - 10 years
- Git - 7 years
Work Experience
Technical Lead | Solution Architect
Superstock Partners LLC
- Built an efficient AI taxonomy and ML clustering pipeline for a 40+ million asset stock media platform, automating content classification. Engineered prerender pipeline with multi-tier caching and CMS page system, improving SEO and Core Web Vitals.
- Spearheaded the transformation of an existing legacy application into a cutting-edge, heavy-loaded photo stock eCommerce solution with a modern, SEO-oriented, and responsive UI, PWA, external API integrations, and multiple back-end dashboards.
- Established a comprehensive DevOps framework for zero-downtime deployment, automated testing, database versioning, and release management on the Azure cloud. Ensured reliable change deployments and seamless operations.
- Architected a 100% cloud-based microservices framework, leveraging the Azure Compute infrastructure through custom Docker containers, Azure Functions, and VMs—an innovative approach enabling on-demand scaling and accelerated new feature development.
- Developed the modern UI using the latest Angular framework, Bootstrap UI library, and server-side rendering technology, seamlessly blending feature-rich responsiveness with optimal SEO practices.
- Orchestrated a smooth onboarding process and effectively managed a distributed team of developers involved in the ongoing system development.
- Engineered an OAuth 2-based identity solution for authenticating eCommerce clients, safeguarding both external and internal APIs.
Identity Architect, Azure Consultant
US Med-Equip
- Assisted in developing a medical asset management application.
- Designed a multi-tenant identity architecture framework for a company-wide application ecosystem.
- Developed the federated identity management server and REST APIs.
- Created a set of reference identity client applications.
- Built and supported automated CI/CD pipelines and developed custom DevOps tooling.
Full-stack Developer, Solution Architect
Shift Holdings
- Created a full CI/CD pipeline for a multi-service eCommerce application using the Azure DevOps cloud-based software delivery platform.
- Delivered several presentations about best practices in software development on-site at the client office in Kuala Lumpur.
- Introduced OAuth OIDC and JSON Web Tokens to the product ecosystem using identity server security components.
- Defined a REST Web API-based microservice architecture. Developed reference components and projects using .NET Core and Entity Framework.
- Created a fleet management system SPA using Angular 7 and .NET Core Web API.
Senior Software Developer
Techona
- Led the development of a distributed back-end product using Angular 5, .NET Core 2, and PostgreSQL.
- Defined highly scalable, modern microservice-based architecture. Implemented a standards-compliant security subsystem.
- Introduced best agile practices in the company’s software development process.
- Participated in a continuous integration ecosystem development project.
Team Leader, Software Engineer
Atalan
- Supervised a distributed development team of up to six members for a high-performance OneDirect eCommerce solution using ASP.NET and C#. The web portal serves two million hits a day and is ready for more.
- Established efficient communication with customers both onsite and offsite in their various European offices.
- Implemented continuous integration, bug tracking, small iterations, and other agile practices. Increased quality and smooth deployment led to more than 99% server uptime.
- Designed and maintained a highly scalable, robust architecture solution.
- Developed a high-demand eCommerce solution using Microsoft ASP.NET MVC and C#.
Project Manager
Software Experts
- Led an architecture, reverse engineering, and code review project of a large (500 KLOC) distributed antivirus system.
- Managed the development of several monitoring modules for a large distributed internal threat-protection system.
- Maintained efficient communication with several company clients.
Project History
Digital Asset Management Solution
https://www.superstock.com/Toptal React Academy
Onedirect eCommerce Solution
https://www.onedirect.fr/Education
PhD in Computer Science
National Research University of Electronic Technology - Moscow, Russia
Master's Degree in Computer Science
National Research University of Electronic Technology - Moscow, Russia
Certifications
Toptal React Academy Graduate
Toptal, LLC
Deep Learning Specialization
Coursera
Neural Networks and Deep Learning
Coursera
Skills
Libraries/APIs
Web API, LINQ, Node.js, Entity Framework, API Development, REST APIs, Back-end APIs, jQuery, Liquibase, React, FFmpeg, NgRx, QuickBooks API, Braintree API, CsvHelper
Tools
Visual Studio, NuGet, Azure DevOps Services, Git, Microsoft Visual Studio, TeamCity, Jira, NPM, RabbitMQ, Angular Universal, Elastic, Azure Application Insights
Languages
C#.NET, TypeScript, C#, SQL, HTML, CSS, JavaScript, Python, YAML, UML, C++, SAML, VB.NET
Frameworks
ASP.NET MVC, ASP.NET, ASP.NET Identity, .NET, .NET Core, OAuth 2, Angular, JSON Web Tokens (JWT), ASP.NET Core, Entity Framework Core, Bootstrap, Redux, Express.js, ASP.NET Core MVC, Selenium, Tailwind CSS, Ext JS, Swagger, .NET 8, .NET 5
Paradigms
Azure DevOps, Dependency Injection, Agile, Design Patterns, Object-oriented Programming (OOP), REST, Unit Testing, Continuous Integration (CI), Continuous Delivery (CD), DevOps, Application Architecture, Event-driven Architecture, Microservices, Automated Testing, CQRS, B2C, B2B, Microservices Architecture
Platforms
Azure, Windows, Azure Functions, Azure PaaS, Docker, Ubuntu Linux
Storage
Microsoft SQL Server, Azure SQL, JSON, SQL Server DBA, PostgreSQL, Amazon S3 (AWS S3), Elasticsearch, Redis Cache, Azure SQL Databases, Azure Blobs, Data Pipelines
Other
OAuth, Web Services, Software Architecture, Architecture, IIS, Algorithms, Multithreading, Data Structures, OpenID Connect (OIDC), APIs, Single Sign-on (SSO), Code Review, Security, eCommerce, Technical Leadership, Artificial Intelligence (AI), Full-stack, Web Development, System Architecture, User Interface (UI), Full-stack Development, Back-end Development, API Integration, Front-end Architecture, Front-end, Team Leadership, Technical Architecture, Software Design, Software Engineering, Microsoft Azure, Containers, Front-end Development, EF6 Code First, QA Automation, SEO Tools, Video Transcoding, Multitenancy, Technical Analysis, Large Language Models (LLMs), Product Management, Consul, Identity Server, Xamarin.Forms, Polly, Performance, Distributed Systems, Cloud, Account Management, Machine Learning, Neural Networks, Deep Learning, CRM APIs, CRM Systems, Leadership, Server-side Rendering (SSR), Virtualization, Computer Science, Distributed Software, CI/CD Pipelines, Team Mentoring, Deployment, Image Processing, Data Compression Algorithms, Solution Architecture, User Experience (UX), Containerization, LLM Integration, Cloud Infrastructure, Billing, Checkout, Customer Relationship Management (CRM), CRM, Cloud Security, Payment APIs, AI Automation, API Design, Data Modeling, Natural Language Processing (NLP), Image Compression, CSV, GDPR
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