Oleh

OLEH SERHUSHYN
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Laois, Ireland

SUMMARY
Highly motivated Full-Stack Developer with a robust foundation in Software Engineering and Computer
Programming, combining expertise in ASP.NET/.NET with modern TypeScript-based React and Node.js
ecosystems. Experienced in end-to-end full-stack web development, project maintenance, and feature delivery,
including leading development efforts within small teams. Proven ability to modernize legacy systems, build
complex backend architectures, and contribute to diverse applications across various industries. Eager to leverage
my skills to drive organizational success and continue professional growth.

WORK EXPERIENCE
Web Developer & Team Contributor | Pickrell Global Technologies | June 2024 – Present
· Led and contributed to the full-stack development of multiple key projects, often guiding efforts within a small
team, utilizing React, Node.js (TypeScript), PostgreSQL, and GraphQL.
· Architected and implemented robust backend solutions for a social mobile application (Node.js/GraphQL) and
a dual-platform web application (React/Node.js/PostgreSQL) for event management.
· Helped manage the software development lifecycle (SDLC) from requirements to deployment, including
translating PRD documents into database schemas, contributing to architectural design (e.g., hexagonal),
breaking down tasks, assigning work to team members, performing code reviews, and providing technical
support.
· Managed the end-to-end modernization of a critical internal portal for a mining contractor, migrating a legacy
PHP 5 application to a secure, performant, and maintainable .NET 8 MVC application.
o Orchestrated the migration of the existing MySQL database to a new server, ensuring data integrity.
o Developed and integrated core functionalities within the ASP.NET MVC framework, including robust
LDAP authentication and user management flows in C#.
o Re-engineered server-side logic and routing from PHP to C#, optimizing application performance.
· Developed and maintained full-stack features for a recruiting platform utilizing React, Node.js (TypeScript), and
PostgreSQL. Implemented core backend logic, including user authorization and CRUD operations.
· Actively participated in code reviews for both frontend and backend contributions, ensuring code quality and
adherence to best practices.
· Contributed to developing and maintaining B2B SaaS and custom applications across manufacturing, logistics,
IoT, education, and mining using .NET 7/8, ASP.NET MVC, React, SQL Server, Firebase, and Azure.
· Optimized performance with raw SQL queries and enhanced CI/CD pipelines with automated tests.
· Actively collaborated in Agile teams through pair programming and design discussions.

EDUCATION
QQI 5 | Carlow Institute | 2023-2024
· Course: Computer Programming and Coding
· Modules: OOP, Mathematics, Software Architecture, Web Authoring, Programming and Design Principles,
Mobile Technologies.

Bachelor (unfinished) | Donetsk National Technical University | 2020-2022
· Course: Software Engineering
· Modules: OOP, Mathematics, Algorithms and data structures, Computer architecture, Databases, Modelling and
analysis software.

TECHNICAL SKILLS
Languages & Frameworks: C#, .NET, ASP.NET MVC, Node.js, TypeScript, React.js, GraphQL, HTML, CSS, jQuery
Databases: PostgreSQL, MSSQL, MySQL, SQL, Firebase
Tools & Platforms: Git, GitHub, Visual Studio, VS Code, Microsoft Azure, Postman, Jest, NPM
Concepts & Practices: Full-Stack Development, Backend Development, Frontend Development, Software
Development Life Cycle (SDLC), RESTful APIs, Hexagonal Architecture, SOLID Principles, Database Design, Unit
Testing, Code Review, CI/CD, Agile Methodologies, Authentication (LDAP), Scalability, SecurityPostman.