Senior Java (+Kotlin NodeJS) Developer

We are looking for a talented

Senior Java Developer

• to join our partner’s team and work on a modern software solution in the
• travel and tourism industry
• . This is an exciting opportunity for a strong Java engineer who enjoys working with modern technologies, distributed systems, and international teams.
• Position details

Start

ASAP

Duration

3 months initially

Location

Ukraine

Employment model

Direct hire

Workload

Full-time

Industry

Travel & Tourism

English

Upper-Intermediate (B2+) to Fluent

Key Responsibilities

• Develop backend solutions based on modern software development practices, cloud platforms, and microservice architecture.
• Participate in application architecture and solution design.
• Take part in architecture and code reviews.
• Design and implement unit, integration, functional, and other types of tests.
• Develop highly testable, scalable, performant, and maintainable code.
• Work with Agile methodologies and participate in Scrum activities.
• Collaborate closely with PMs, engineers, architects, QA, and other stakeholders.
• Communicate directly with the client on a daily basis to clarify requirements and discuss technical solutions.
• Contribute to technical documentation and feature design.
• Troubleshoot, profile, debug, and optimize applications.
• Participate in refactoring and continuous improvement of development processes.

Requirements

• 5+ years of commercial software development experience.
• 3+ years of strong commercial experience with Java.
• Strong knowledge of

OOP, SOLID, DDD, TDD/BDD

• , algorithms, data structures, and design patterns.
• Strong experience with

Spring Boot

and backend development.

Experience with

• high-performance and high-load systems
• .
• Good knowledge of

Kotlin

and reactive programming, preferably with Spring Boot Reactor.

Experience with

• Node.js / TypeScript
• , particularly for AWS Lambda functions.
• Strong understanding of

REST APIs

• , authentication and authorization flows, OAuth, JWT, and network protocols.
• Experience with relational databases such as

PostgreSQL, MySQL/MariaDB, or Oracle

.

Experience with

• NoSQL / key-value storage
• such as Redis or Memcached.
• Experience with messaging systems such as

Kafka, RabbitMQ, AWS SQS

, or similar.

Experience with

Docker

• and cloud platforms, preferably AWS.
• Good knowledge of

Git

• and CI/CD practices.
• Understanding of security principles and common vulnerabilities, including

OWASP

• .
• Experience with microservices architecture and distributed systems.
• Ability to communicate directly with international clients and clarify technical requirements.
• English: Upper-Intermediate (B2+) or higher.

Technical Skills

Languages

Java, Kotlin, Node.js, TypeScript

Frameworks

Spring Boot, Spring Boot Reactor

Architecture

Microservices, DDD, design patterns, distributed systems

Databases

PostgreSQL, MySQL/MariaDB, Oracle, Redis, Memcached

Messaging

Apache Kafka, RabbitMQ, AWS SQS or similar

Cloud

AWS

Testing

JUnit, PowerMock, WireMock

DevOps

Docker, CI/CD, Git

Security

OAuth, JWT, OWASP

OS

Linux and command-line tools

Nice to Have

• Hands-on experience with
• AWS services
• such as Aurora, Lambda, and Step Functions.

Experience with

Kubernetes

.

Knowledge of

Terraform or Ansible

• .
• Experience with serverless architecture.
• Experience integrating third-party solutions.

Knowledge of

MongoDB, Elasticsearch

• , or other NoSQL technologies.
• Experience with search engines.
• Relevant Java, Spring, or cloud certifications.

What We Offer

• Opportunity to work on an international project in the
• travel and tourism industry
• .
• Collaboration with experienced engineering professionals.
• Exposure to modern cloud-based and microservices architecture.
• Professional growth and knowledge-sharing opportunities.
• International and collaborative working environment.