Yaroslav

Yaroslav Lukianenko

Phone number: [відкрити контакти](див. вище в блоці «контактна інформація») (Mobile) Email address: [відкрити контакти](див. вище в блоці «контактна інформація»)

https://github.com/YaRuliY telegram: @yaruliy Address: Kyiv, Ukraine (Work)

ABOUT ME

Software Engineer with 7+ years of experience designing and delivering scalable, high-load systems and cloud solutions. Proven
expertise in Java (8–21), Spring ecosystem, and AWS, with a track record of designing and delivering production-ready systems from
scratch, from technical requirements and architecture to deployment, as well as migrating monolithic applications to microservices
across different domains. Experienced in working within globally distributed multicultural teams, and improving engineering
practices. Passionate about clean architecture, continuous learning, and building solutions that drive measurable business impact.
WORK EXPERIENCE

1PLUS1.MEDIA
JAVA ENGINEER – 05/2025 – CURRENT

Project Name: NDA
Description: Cloud-based OTT video streaming platform
Tech Stack: Java (8-21), Spring (MVC, Security, Data, Boot), AWS (EKS, ECR, SQS, S3), MongoDB, JWT, Docker, Maven
Responsibilities:
• Maintained and enhanced legacy systems through continuous support and bug fixing, ensuring long-term system stability and
reliability.
• Implemented new business requirements, from estimation and scoping to development, testing, and release planning.
• Developed and optimized RESTful API services, enhancing back-end functionality.
• Ensured high code quality by implementing and maintaining unit and integration test coverage.
• Led migration initiatives, including:
• Transition from Scala to Java, improving maintainability and onboarding speed for new engineers,
• Migration from JAX-RS to Spring ecosystem, unifying development standards and reducing integration issues by ~15%,
• Transformation of a monolithic system into microservices architecture, decomposing it into 10+ independent services,
enabling 5X scalability and reducing downtime impact by ~50%.

FORDEWIND.IO
JAVA ENGINEER – 03/2023 – 12/2024

Project Name: Pytronic
Description: Designed and implemented a scalable IoT cloud platform that enabled seamless integration with various virtual
assistants, enhancing compatibility and end-user experience
Tech Stack: Java 8, AWS (Elastic Beanstalk, EKS, ECR, SQS), Spring (MVC, Security, Data, Boot), Thymeleaf, MongoDB, Google API,
Alexa API, JWT, OpenVPN, Docker, Gradle
Responsibilities:
• Designed and implemented a scalable IoT cloud infrastructure from scratch, supporting integration with multiple virtual
assistants (e.g., Google Assistant, Alexa).
• Implemented new features and business requirements, developed RESTful APIs and backend services optimized for peak load
conditions, improving response time by ~35%.
• Covered back-end functionality with unit and integration tests, increasing coverage from ~50% to 85%, reducing production
incidents by ~25%.
• Built deployment scripts and packaging for CI/CD pipelines, contributing to faster and safer releases.
• Developed a secure backend solution enabling remote access to home devices via VPN, ensuring reliable and safe
connectivity for 100K+ devices (up to 200 per household/gateway).
• Participated in estimation, scoping, and release planning with cross-functional teams.
• Mentored junior developers, conducted code reviews, and facilitated knowledge transfer within the team.

JAVA ENGINEER – 05/2021 – 09/2022

Project Name: Arthrosight
Description: Developed backend services for a medical CRM web application used to manage documents, enable communication
between roles in the organization, handle patient data, and preview 3D scans (STL).
Tech Stack: Java 8, AWS (Elastic Beanstalk), Spring (MVC, Security, Data, Boot), PostgreSQL, JWT, Gradle, FHIR proto (R4)
Responsibilities:
• Designed backend solution architecture from scratch to support scalability and security in a medical context.
• Implemented new requirements, developed RESTful API services, supporting multi-role communication and secure access
control, improving operational efficiency within the organization by ~20%.

• Designed and implemented in-platform 3D scan (STL) preview functionality, enabling medical staff to access imaging data
without third-party tools, reducing software costs and procedure planning time by ~20%.
• Wrote unit and integration tests ensuring reliability and compliance with healthcare standards.

JAVA ENGINEER – 02/2018 – 01/2024

Project Name: Geeni
Description: Supported and enhanced a production-grade IoT cloud platform, delivering features such as system metrics, health
checks, externalized configuration, and API integrations. Focused on stability, scalability, and continuous improvement of services in
a high-load environment.
Tech Stack: Java 8, AWS (EC2, Elastic Beanstalk, SQS), Apache Kafka, Apache Pulsar, Spring (MVC, Security, Data, Boot), MongoDB/
DynamoDB, JWT, Gradle, Google API, IFTTT API
Responsibilities:
• Maintained and optimized a production IoT solution, resolving critical bugs and ensuring high availability, reducing incident
response time by ~40%.
• Developed and integrated RESTful APIs (Google API, IFTTT API), enabling seamless communication between IoT devices and
external platforms.
• Optimized AWS resource utilization (EC2, Elastic Beanstalk, SQS, IoT Core), reducing monthly infrastructure costs by ~25%
through instance right-sizing, auto-scaling policies, and removal of unused resources.

BIGDATAHUSH
JUNIOR JAVA DEV – 05/2017 – 08/2017

Project Name: LoraNet
Description: Developed an IoT control system for smart devices communicating via the LoRaWAN protocol.
Tech Stack: Java 8, Maven, OAuth2, Hibernate, JDBC, Spring MVC, LORAWAN protocol
Responsibilities:
• Collaborated with stakeholders to collect and clarify functional and technical requirements.
• Introduced a structured approach to requirements analysis (use cases, acceptance criteria), improving feature delivery
predictability and shortening the development cycle by ~15%.
• Implemented core backend functionality in Java, including RESTful API services.
• Created build and deployment scripts to streamline the CI/CD pipeline.
• Developed a scalable IoT control system supporting up to 10K LoRaWAN gateways, ensuring stable communication, secure
data transmission, and enabling OTA updates.

EDUCATION AND TRAINING

2013 – 2017
BACHELOR'S DEGREE IN SOFTWARE ENGINEERING National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic
Institute”, Kyiv, Ukraine

PROFESSIONAL SKILLS

Hard skills

Programming Languages: Java (8–21)
Frameworks & Technologies: Spring ecosystem (Boot, MVC, Security, Data), Hibernate, JDBC, Microservices, REST API
Databases: PostgreSQL, MySQL, MongoDB, DynamoDB
WEB: Javascript, Thymeleaf
Cloud & Messaging: AWS (EKS, ECR, S3, SQS), RabbitMQ, Kafka, Pulsar
Testing: JUnit, Mockito, Testcontainers
Operating System: Windows, Unix
Development Tools: Eclipse, IntelliJ IDEA, Docker, Jira, Rally, SVN, Git, Gradle, Maven, SBT, Ant

Soft skills

Core competencies: Decision-making, Innovation, Problem-solving in high-load environments, Communication,
Responsibility, Team-work oriented, Adaptability

LANGUAGE SKILLS

Mother tongue(s): UKRAINIAN
Other language(s):

UNDERSTANDING SPEAKING WRITING

Listening Reading Spoken production Spoken interaction

ENGLISH B1 B1 B1 B1 B1