Олексій Ветеран

Oleksii Zamyslov
Contacts:
Telegram: @oleksiizam
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
Linkedin: [відкрити контакти](див. вище в блоці «контактна інформація»)
Skills:
Languages & Frameworks: C#, .NET, ASP.NET Web API, ASP.NET MVC, WCF, WPF, VB.NET;
Architecture & Design: Microservice Architecture, Domain-Driven Design (DDD), Event-Driven Architecture
Databases: MS SQL / T-SQL, PostgreSQL
Messaging & Infrastructure: RabbitMQ, Docker, Kubernetes, Helm
CI/CD & DevOps: Jenkins, GitHub, Grafana, Kibana, Prometheus
CMS & Other Tools: EpiServer CMS, ADO.NET, Microsoft Enterprise Library, RedGate Profilers, NDepend, CSLA, DevExpress, Actian Data Flow
Methodologies: Agile / Scrum (incl. Scrum Master role), Code Review, Mentoring, Technical Leadership, Architecture Design

Professional Experience:

Company: BigTree108
Role:Senior Software Engineer
Duration: 2026
Development of new features for a messaging client.

Technologies: Claude Code, NET 8, ASP.NET Web API, Websockets

Company: Armed Forces of Ukraine
Role:Soldier
Duration: 2024-2025

Fulfilled mandatory military service obligations.

Company:Lodgify
Role:Lead Software Engineer
Duration:2022-2024

Lodgify is a property management/channel manager platform for websites such as AirBnb, Expedia, Booking.com

My responsibilities were managing the ‘Rates’ team (of 3 people). We were maintaining 3 microservices responsible for forming prices for our users. Developing new features, fixing bugs, discussing solutions, deploying, monitoring, i.e. all of microservices life cycle were in our responsibility.

Achievements:
• Built monitoring infrastructure from scratch, delivering 2 Grafana dashboards covering service health, latency, error rates and kubernetes statistics;
• Reduced p95 latency to under 100ms across pricing microservices;
• Reduced daily error and warning log volume by 99%, significantly improving system reliability and on-call noise;

Technologies: C#, NET 7, ASP.NET Web API, Microservice Architecture, DDD, MS SQL, Postgres, RabbitMq, Docker, Kubernetes, Helm, Jenkins, GitHub, Grafana, Kibana, Prometheus.

Company:Genesis, Kyiv
Role:Lead Software Engineer
Duration:2020-2021

Suits is a mobile app startup focused on managing your virtual wardrobe. Users can purchase clothes (coming from our connections with many brands and retailers), style their looks and share. Competitions called challenges are offered to encourage users. Voting is used to determine the most fashionable look.

As a lead backend developer, I was responsible for building our backend services hosted in AWS. My responsibilities included preparing the architecture, CI/CD, writing the backbone features for our microservices, distributing tasks between developers and DevOps and making sure we deliver on time.

Technologies:C#, .NET Core 3.1, ASP.NET Web.API, MS SQL

Company:Criteo (Paris, France)
Role:Senior Software Engineer
Duration:2017 – 2019

At Criteo, we connect 1.4 billion active shoppers with the things they need and love. Our technology takes an algorithmic approach to determining what user we show an ad to, when, and for what products. Our dataset is about 45 petabytes in Hadoop (more than 90 TB extra per day) and we take less than 10ms to respond to an ad request.
My team here in Criteo was focused on building SDK for other teams to base their codebase on. Building our in-house solution for flexible configuration of our systems, which is crucial for smooth version upgrades and A/B testing.
Technologies:C#, .NET 4.5, ASP.NET Web.API, MS SQL, Red Gate profilers.

Company:Telenor Group
Role:Architect
Duration:2016 – 2017

OneScreen was an ambitious project aimed at unifying the business processes of Telenor Group (a telecommunications company) in multiple countries. The goal was to replace standalone existing solutions in 7+ countries with a single OneScreen solution. It was able to offer the most of the functionality out of the box, while still allowing country-specific customizations. Technically it was a ASP.NET MVC application making use of EpiServer CMS functionality that is built on top of the backend REST API provided by a separate vendor.

As a Lead Architect I was responsible for all technical aspects on the project of 90 people, overseeing work of the architects team, CI/CD team and automated QA team.

Technologies:C#, .NET 4.5, ASP.NET MVC, EpiServer CMS, T-SQL, RestSharp, NDepend, Red Gate profilers.

Company:EPAM Systems
Role:Lead Developer, Scrum Master, Resource Manager
Duration:2013 – 2016

The project was a software platform for collecting, analyzing and querying data on medical service providers in the USA. It consisted of several components that communicate using WCF services. The main services provided by the platform include:
• Provider data aggregation from various sources: text, csv, xlsx etc. files with different format are normalized and stored in several databases;
• Cleaning up the dirty data: duplicates and corruptions caused by the OCR. Complex ETL algorithm that includes fuzzy logic, address validation, name validation and complex data analysis is used to ensure best data quality;
• Provider search: system allows a highly customizable search based on all data accumulated in the databases;
• Provider benchmarking: using statistical information available to the system, it automatically assigns scores to the providers using a proprietary statistical algorithm;
• Generation of various reports based on accumulated data;

Technologies:C#, .NET 4.0, WCF, T-SQL, ASP.NET MVC, Microsoft Enterprise Library, ADO.NET, Actian Data Flow.

Company:EPAM Systems
Role:Senior Developer
Duration:2012 – 2013
Project Name:Bloomberg Charts

The project was a WPF client with a WCF server used for displaying information related to stock exchange, mostly in chart form. My responsibilities consisted of implementing new features, fixing bugs.

Responsibilities:
• Implementing new features
• Bug Fix
• Code review
Technologies:C#, .NET 4.0, WPF, WCF

Company:GlobalLogic
Role:Sub-Lead Developer
Duration:2011 – 2012
Project Name:Mobile ClearingHouse Network
The Mobile ClearingHouse Network software is a framework for banks, bank processors and money transmitting companies to mobilize their services for their end users. Mobile ClearingHouse Network project is a server and mobile phone applications, which allows highly secure mobile commerce solutions to manage debit or credit cards, mobile wallet, international money movement, paying bills etc. The team worked on development of the core of the system – the server side of the application, including integration with SMS providers, e-commerce systems and banking processors on all the levels from domain research and architecture creation to development, testing and system configuration. The team also worked on the mobile applications for iOS, Android, BlackBerry, WP7 and j2me platforms.

Responsibilities:
• Participating in feature design, estimation and planning
• Assigning tasks and mentoring a team of up to six developers
• Code review
• Design and implementation of WCF services, business layer objects and database.
• Collaborating with mobile developers’ team to assist client-server integration
• Performance profiling and troubleshooting
• Designing and implementing utilities for development simplification.
Technologies:C#, .NET 4.0, WCF, T-SQL, Azure, Silverlight, WebSocket, ASP.NET

Company:GlobalLogic
Duration:2009 – 2011
Project Name:Paceart Optima
Role:Junior Developer, then Middle Developer
Product Workload:A client-server application offering rich functionality for managing clinical patient records.
Technologies:Windows Forms, MS SQL, DevExpress, CSLA, Linq, NUnit
Company:GlobalLogic
Duration:2008 – 2009
Project Name:OSCARNet
Role:Junior Developer
A web application supporting a network of online shops.
Technologies:ASP.NET, VB.NET, C#, JavaScript, SQL, CSS.