Kostya Kapustin - Java Developer

Overview

An early-career front-end practitioner focused on creating simple static HTML pages with clear semantic form markup. The strongest proven skill is writing straightforward, semantic HTML forms and content structure as shown in index.html with labeled inputs and table-based personal data. There is no evidence of component-based frameworks, CSS architecture, JavaScript state management, testing, or build tooling in the public files.

Phone

Timeline

Java Developer · Middle

DataGile · Full-Time

Mar 2025 to Present 1 Year 8 Months In office

Developed Java integration connectors for identity management system interoperability. Designed and implemented REST and SOAP services for data exchange between external systems. Built and migrated PostgreSQL database changes using Liquibase without taking production services offline, and implemented workflow logic with BPMN. Used Spring and OSGi for a modular architecture, managed dependencies with Maven, and coordinated work via Jira and Confluence with CI/CD in TeamCity.

Java

PostgreSQL

Liquibase

BPMN

Spring Framework

Maven

Rest API

SOAP

Jira

Confluence

TeamCity

Java Developer · Middle

Omega Soft · Full-Time

Feb 2023 to Mar 2025 2 Years 1 Month In office

Built REST APIs using Spring Boot with PostgreSQL, managing schema and migrations via Flyway. Implemented data access with Hibernate/Spring Data and structured services using Spring Cloud microservices. Integrated MinIO S3 for file storage and set up CI/CD in TeamCity with Docker and Portainer. Implemented async messaging with RabbitMQ and Kafka, added authentication and authorization with JWT and Spring Security, and created unit/integration tests with JUnit and Mockito plus API testing and documentation with Postman and Swagger.

Spring Boot

PostgreSQL

Flyway

Hibernate

Spring Cloud

MinIO

TeamCity

Docker

RabbitMQ

Apache Kafka

Spring Security

Swagger

JUnit

Mockito

Rest API

Technical skills

Languages

2

Java

SQL

Java

8

Spring Cloud

Spring Security

Hibernate

Spring Boot

Spring Framework

Flyway

Maven

Liquibase

Databases

5

PostgreSQL

Apache Kafka

RabbitMQ

MinIO

Redis

DevOps

5

Rest API

Docker

TeamCity

CI/CD

Amazon S3

Other

8

Mockito

JUnit

Swagger

GitHub

Git

SOAP

Postman

Frontend

Junior Frontend Developer Confidence: Medium Generalist

An early-career front-end practitioner focused on creating simple static HTML pages with clear semantic form markup. The strongest proven skill is writing straightforward, semantic HTML forms and content structure as shown in index.html with labeled inputs and table-based personal data. There is no evidence of component-based frameworks, CSS architecture, JavaScript state management, testing, or build tooling in the public files.

UI Component Architecture

1/10

How interface parts are built

Minimal component architecture; a single static HTML file without modular components, CSS architecture, or composition patterns.

Evidence

KostayKapustin/resume/index.html: single static HTML file with form and table, no componentization or modular structure

Responsive & Cross-browser

1/10

Works on all screens and browsers

Basic mobile hint via viewport meta but no responsive layout techniques, media queries, RTL or feature detection.

Evidence

KostayKapustin/resume/index.html: meta name="viewport" and img width attribute present but no CSS or media queries

Performance Optimization

1/10

Speed of the interface

No measured or deliberate performance work; no lazy loading, srcset, or bundling/code-splitting strategies are present.

Evidence

KostayKapustin/resume/index.html: img tag with width attribute but no srcset, loading=lazy or performance hints

Accessibility & Semantics

2/10

Usable for everyone

Some basic semantic markup and form labels are present and the image has alt text, but there is no ARIA, focus management, or accessibility tooling.

Evidence

KostayKapustin/resume/index.html: label elements paired with input ids and img includes an alt attribute

State Management & Data Flow

1/10

Managing data in the app

No client-side state or async discipline; the page uses a plain HTML form action without client-side validation, request cancellation, optimistic updates, or state machines.

Evidence

KostayKapustin/resume/index.html: form action="/" with inputs but no JavaScript handling, validation or async logic

UX & Visual Polish

1/10

Look and feel quality

Minimal UX polish: basic placeholders and a submit button exist, but there are no styling, skeletons, loading/error/empty states or transitions.

Evidence

KostayKapustin/resume/index.html: input placeholders and a submit button are present but there is no CSS or UI state feedback

Technologies

Frontend

Recommendations

Produce and maintain static marketing or personal sites and simple landing pages that rely on semantic HTML.
Convert designs into HTML prototypes and improve accessibility on small content-driven pages using progressive enhancement.
Focus on adding CSS, responsive layouts, and basic client-side validation to evolve these artifacts into production-ready pages.

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

resume

Job preferences

Work permits: Russia
Salary: from $30k per year
Employment type: Full-Time