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.