Arūnas Račelis

Java Developer

About

Hello!

I am a Java Software Developer with over >5 years of experience.

I have worked on various large-scale projects, focusing on data-processing engines and internal management systems.

I am a self-driven developer with a strong interest in Clean Architecture and managing end-to-end cloud infrastructure using Kubernetes.

Basic Information

Age:

Email:

[email protected]

Address:

Vilnius, Lithuania

Language:

Lithuanian, English, German (A1)

My Skills

Languages: Java 17, Kotlin (basics), TypeScript, JavaScript

Back-end: Spring Boot, Spring Webflux, Spring Security, Quartz, Maven, Lombok, MapStruct

Front-end: React, TypeScript, Thymeleaf, HTML5/CSS3, ChakraUI

Architecture: Microservices, Clean Architecture, REST API, Event-Driven (SNS/SQS).

Data & Messaging: PostgreSQL, Elasticsearch, MySQL, Kafka, MinIO, ChatGPT API.

DevOps & Infra: Docker, Kubernetes (k3s/k8s), Helm, GitLab CI, Jenkins.

Security: Keycloak, OAuth2.

Testing: Junit5, Wiremock, Testcontainers

Work Experience

Oct, 2024 - Jan, 2026

(1 year, 3 months)

Unique X

Java Developer

Full Stack Development: Managed a mission-critical monolithic TMS (Theatre Management System), delivering features and bug fixes across a Java 8 backend and AngularJS frontend (~30% of tasks).

Hardware Control & Automation: Engineered complex Macro commands to orchestrate synchronization between core software and cinema hardware (Projectors, Players, Sound Processors).

Cloud Integration: Utilized AWS SNS/SQS to implement asynchronous data exchange for playlist and playout synchronization across distributed services.

Jul, 2022 - May, 2024

(1 year, 10 months)

Nortal

Java Developer

Cross-Functional Collaboration: Partnered closely with Frontend teams to define and implement robust API contracts, ensuring seamless data flow for the Cyber Security Training and Competence Building platforms.

Feature Ownership: Contributed to the development of the Business Result Reporting module, managing complex data logic to support organization-wide project management.

Technical Adaptability: Transitioned from Java to Kotlin to meet project requirements, taking a key role in developing and maintaining a new microservice from the ground up.

Quality & Standards: Actively participated in daily Code Reviews, ensuring the team’s Clean Architecture and OpenAPI (Swagger) standards were consistently applied.

Sep, 2021 - Jun, 2022

(10 months)

Zenitech

Java Developer

Data Processing: Developed microservices to transform and route real-time sports data "cards" to downstream users.

Enterprise Integration: Used Apache Camel and ActiveMQ to orchestrate messaging between distributed services.

Data Mapping: Handled complex XML transformations using XSL/XSLT to support legacy data formats.

Nov, 2020 - Aug, 2021

(10 months)

Nasdaq

Java Developer

Multinational Collaboration: Worked within a global team (US, Sweden, Lithuania) to develop and maintain an internal Trade Risk System.

Foundational Engineering: Established core software development best practices while contributing to mission-critical financial risk monitoring tools.

Aug, 2011 – Feb, 2016

Other

Previous experience

Oct, 2017 – Nov, 2020 (3 years, 2 months). RPA Developer At SEB
Feb, 2016 – Oct, 2017 (1 year, 9 month). Financial systems analyst at Western Union Processing Lithuania<
Aug, 2014 – Feb, 2016 (1 year, 7 months). Accounting associate at Western Union Processing Lithuania
Dec, 2012 – Aug, 2014 (1 year, 9 months). On-line/Off-line service specialist at Western Union Processing Lithuania
August 2011 – December 2012 (1 year, 5 months). Customer Service Representative at Transcom Worldwide

Education

January 2020 - December 2020

Java From Scratch course

Software Development Academy

Java From Scratch course