Сергій

SERHII BUNIAK
.NET BACKEND DEVELOPER

WORK EXPERIENCE
MIDDLE BACKEND DEVELOPER — TRAVELATED
Aug 2023 to Present

CONTACT Worked on a travel platform aggregating 1M+ hotels and 10M+ rooms, focusing
on integrations, search performance, and payments.
[открыть контакты](см. выше в блоке «контактная информация»)
[открыть контакты](см. выше в блоке «контактная информация») Key Achievements:
https://github.com/Serhii-Buniak ●​ Integrated 10+ suppliers (REST, gRPC, GraphQL), enabling scalable data
Ukraine, Chernivsi
aggregation
●​ Optimized queries and indexing for datasets with 1M+ records, reducing DB
load
●​ Designed and implemented Elasticsearch search with ~100ms response
SKILLS
time, improving user experience and search relevance
C#, .NET, ASP.NET ●​ Integrated payment systems (Adyen, Stripe), including secure handling of
PostgreSQL, MS SQL raw card data and payment flows
●​ Built ChatGPT-based system for email parsing, tagging, and prioritization
Elasticsearch, Redis
●​ Implemented full localization pipeline for 15+ languages (including RTL and
RabbitMQ pluralization rules)
REST, gRPC, GraphQL ●​ Built microservices from scratch for authorization and browser extension
features
Docker, Git
Technologies :
●​ Backend: ASP.NET (.NET 8), Entity Framework, PostgreSQL, Microservices,
EDUCATION RabbitMQ, Redis, Sentry, Docker, NUnit, Moq
Bachelor of Computer Science ●​ Frontend: React, i18next
Chernivtsi National University,
Ukraine - 2024
FULLSTACK DEVELOPER — EPlast — Open Source Project
May 2022 to Oct 2022
Key Achievements:
CERTIFICATIONS
●​ Implemented authentication & authorization using JWT
.Net Certification - SoftServe
●​ Developed real-time features using SignalR
English Evaluation - SoftServe
●​ Contributed to refactoring and stabilization of the codebase
●​ Collaborated in a Scrum team (5-7 developers)

LANGUAGES Technologies :
●​ Backend: ASP.NET Core 3.1, Entity Framework, MS SQL Server, MediatR,
Ukrainian - Native
SignalR, AutoMapper
English - Intermediate (B1)
●​ Frontend: React, redux, Axios, Ant Design