Aleksey

Alexey Niki n
Java / Full-stack Developer (Spring Boot + React/Next.js)
E-mail: [open contact info](look above in the "contact info" section)
Phone: [open contact info](look above in the "contact info" section)
Telegram: @Alexey_Niki n1313
LinkedIn : h ps://[open contact info](look above in the "contact info" section) n-62728414b/
GitHub: h ps://github.com/AlexNik13/
Loca on: Ukraine, Cherkasy (ready for remote work)

About me
Java Backend / Full-Stack Developer with 4 years of experience building web applica ons. Specializing in
the Spring Boot ecosystem (Spring Security, Data JPA, REST API), JWT-based authen ca on, and
rela onal databases (PostgreSQL, MySQL). Proven track record of designing and developing CRM/LMS
systems from scratch, including mul -tenant architecture and role-based access control. Strong exper se
in Full-Stack Next.js (SSR/ISR) ensures seamless integra on between backend logic and UI, driving full
ownership of the product lifecycle.

Technical skills
Backend:
Java, Spring Boot, Spring Security, Spring Data JPA, JDBC, REST API, WebSocket, JWT Authen ca on
Frontend: Next.js, React, TypeScript, JavaScript, HTML/CSS
Databases: PostgreSQL, MySQL, Redis
DevOps / Infrastructure: Docker, Nginx, DigitalOcean, Google Cloud, Let's Encrypt, Maven
Tools and technologies: Git, Swagger/OpenAPI, Hibernate/JPA, Telegram Bot API

Work experience
Full-stack Developer (Java + Next.js)
2023 – present
Designed and developed a scalable web pla orm from scratch, integra ng CMS, LMS, an admin panel,
and a CRM module for lead genera on.

 Designed and developed a scalable web pla orm from scratch, integra ng CMS, LMS, an admin
panel, and a CRM module for lead genera on.
 Implemented mul -lingual and mul -domain support to scale the pla orm across different
regions.
 Developed SEO-op mized blog systems and lead capture forms to boost organic traffic.
 Built an RBAC (Role-Based Access Control) system to manage user permissions.
 Created a CRM/LMS module featuring message history, applica on status tracking, advanced
search/filtering, and course access management.

Stack:
Backend: Java, Spring Boot, Spring Security, Spring Data JPA, WebSockets, REST.
Frontend: Next.js, React, TypeScript.
DevOps / DB: PostgreSQL, Docker, Nginx, Let's Encrypt.

Website: h ps://sea-gull.school/
h p://courses.sea-gull.school/

Java Backend Developer - UAPP
2021 - 2023
Developed CRM systems and solu ons for internal document management.
Main tasks:
• REST API implementa on;
• development of real- me func onality via WebSocket;
• op miza on of business logic and SQL queries;
• support and development of exis ng func onality;
• bug fixing and refactoring.
Worked with Spring Security and JWT authen ca on, implemented a role system and access control.
Used JPA Specifica on and plain JDBC to work with the database.
Stack:
Java, Spring Boot, Spring Security, Spring Data JPA, JDBC, PostgreSQL, WebSocket, Swagger/OpenAPI,
Docker, Git.

Educa on
Cherkasy State Technological University (CSTU)
Bachelor of Science (B.S.) in Economics and Management
2003 - 2008

Languages
Ukrainian: na ve
Russian: na ve
English: Intermediate B1 - reading technical documenta on