Олексій

O l e k s i i B i ke re i i

J ava D eve l o p e r, C h e r k a s y

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o l e k s i i . b i k e re i @ g m a i l .c o m

L i n ke d I n

@ b i ke re i

Professional Summary

I`m a Java Developer who has more than 4 years of experience. Skilled in translating

business requirements into technical solutions. Adept at collaborating with cross-functional

teams to deliver high-quality software solutions within deadlines. Responsible team-player,

who is also organized and calm, searching for a long-term job with ability to learn and

develop hard and soft-skills

Experience

Kyivstar.Tech (Online Shop)


Jan 2023 – Jan 2025

Kyivstar eShop is an online store where customers can order devices, SIM cards, and

exclusive mobile numbers. A key feature of this platform is Pick Number, which allows

customers to browse, select, and purchase exclusive mobile numbers directly through

the store. The platform is now being re-engineered to replace the legacy solution with a

modern, scalable, and maintainable architecture.

Responsibilities & achievements

Developed a new backend service from scratch to replace the legacy system for

exclusive number ordering.

Designed and implemented the database schema to suppor t reservation and ordering

flows.

Built RESTful APIs for internal and external integrations, ensuring reliability and

per formance.

Implemented core business logic for order validation, number availability checks, and

payment handling.

Par ticipated in architectural design and code review sessions to maintain high code

quality.

Set up CI/CD pipelines for automated testing, build, and deployment.

Collaborating cross-functionally with UI/UX, frontend, QA, and DevOps teams to

deliver a smooth customer journey and quality user inter face.
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Technology stack used
Java 21, Spring, PostgreSQL, Lombok, Mapstruct, OpenAPI, Gradle, Docker, Kubernetes,
Flyway, Junit, AWS, Kibana, Git, CI/CD, Jira.

Intellias (Trustd)

Jan 2023 – Jan 2025

Trustd is a user verification and identification platform designed to integrate with third-
party services for enhanced security and compliance. It leverages BPMN-based
workflows, DMN business rules, and various authentication mechanisms to ensure a
seamless and secure verification process. The platform is continuously evolving,
integrating new features, and optimizing its infrastructure to enhance user experience
and system efficiency.

Responsibilities & achievements
Developing a platform to verify and identify users, integrating additional verification
steps from third-party services.

Ensuring seamless communication between services using RESTful and SOAP APIs.

Customizing the authentication flow using Keycloak to improve security and user
experience.

Writing comprehensive API documentation, including endpoints, request/response
formats, authentication methods, and usage guidelines.

Managing releases to production, ensuring smooth deployment of new features.

Addressing and resolving production issues to maintain system stability and user
satisfaction.

Implementing email and SMS notifications to keep users informed throughout the
verification process.

Technology stack used
Java, Spring, Amazon Web Services (AWS), MongoDB, Camunda BPM, PostgreSQL,
Keycloak, Lombok, Mapstruct, OpenAPI, Maven, Docker, Kubernetes, New Relic, Flyway,
SendGrid, Twilio, Junit, Git, CI/CD, Jira.

Intellias (BlaBlaCar)

Apr 2022 – Jan 2023

The project focuses on integrating and onboarding new transportation partners into the
BlaBlaCar system, ensuring seamless connectivity, service availability, and enhanced
user experience. This involves designing adapter solutions, analyzing technical
requirements, conducting testing, and optimizing integration processes to maintain
system reliability and scalability.

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Responsibilities & achievements
Integrating new transportation partners into the system for seamless operations.

Ensuring compatibility and consistency across different platforms.

Designing and implementing adapter solutions for smooth carrier integration.

Maintaining technical alignment with existing infrastructure.

Reviewing and understanding operator documentation.

Defining integration strategies based on technical specifications.

Conducting comprehensive testing of newly integrated carriers.

Validating functionality, performance, and compatibility with existing systems.
Technology stack used
Java, Spring, MongoDB, Microservices, Lombok, Mapstruct, OpenAPI, Maven, Gradle,
Apache Kafka, Redis, Docker, Kubernetes, New Relic, Grafana, Junit, Git, CI/CD, Jira.

Intellias (Payment System)

Sep 2021 – Apr 2022
The client was an Austrian company that focused on technology solutions for the
Banking domain. One of the goals of their business transformation strategy geared
towards the implementation of a payment system. The core task was to speed up
payment times as much as possible. The dedicated team was engaged in the
development of a full-featured product from scratch, maintenance and extension of the
existing functionalities. Engineering efforts comprised the creation of an API and a
backend part. The development team united 10 engineers
Responsibilities & achievements
Created integration tests using test containers

Designed a scheduler lock

Implemented GraphQL scheme

Developed new microservices
Technology stack used
Java 11, Spring Boot, Kubernetes, Docker, Postman, PostgreSQL

Education: L anguages:
National Technical University of Ukraine English pper-Intermediate ,
(U )

'Kyiv Polytechnic Institute' Ukrainian Native
( )

• Bachelor s Degree, Computer Engineering.

’

• Master s Degree, Computer Engineering.
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