Сергій

.NET developer

Age:: 23 years
City of residence:: Chernivtsi
Ready to work:: Chernivtsi, Remote

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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.
(look above in the "contact info" section)
(look above in the "contact info" section) 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

Сергій

.NET developer

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