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Senior Java Developer for Ciklum Digital


Java vacancies


On behalf of Ciklum Digital, we are looking for a Senior Java Developer to join our team on a full-time basis.

You will join a highly motivated team and will be working on a modern solution for our client. We are looking for technology experts who want to make an impact on new business by applying best practices and taking ownership.

About project:

We are looking to extend our back-end team with a Senior Java Developer with experience in building high-performing, scalable, event-driven applications. You will be responsible for maintaining and developing a tech stack, consisting of a core gaming platform system and an event-driven microservice-based application operating on top of it. The technology it is built upon is Groovy (core platform), Java (microservice layer), Spring and Kubernetes. You will be a part of a friendly and open-minded team, enjoying informal attitude and high level of cooperation, so bring your positive mindset and be ready to smile while at work!



  • Participate in the design, extend and support the stack functionality – transactional logic, game play events, campaign and bonus logic, compliance requirements, etc
  • Assist customer support and site owners in resolving production issues in a timely manner
  • Propose and implement improvements and optimizations of the tech stack
  • Collaborate with the product owners and stakeholders on grooming and estimating stories
  • Work closely with the front-end team and BI specialists on any back-end dependencies


  • Experience in software development for more than 5 years
  • Excellent knowledge in Computer Science, Computing Theory:
    • Paradigm & Principles (OOP, SOLID, DDD, TDD, BDD)
    • Database theory (RDBMS, NoSQL)
    • Code testing practices
    • Algorithms
    • Data structures
    • Architectural, Enterprise and Design Patterns
    • Security patterns, Reverse engineering resistance, Common attacks types (OWASP)
  • You possess solid OOP skills
  • Understanding of network interactions:
    • protocols
    • conventions (e.g. REST, RPC)
    • authentication and authorization flows
    • standards and practices (e.g. oAuth, JWT)
  • Excellent knowledge and experience in Javas (Java 8 or above) (more than 3 years)
  • Practical commercial experience with:
    • REST API development
    • You are experienced with Spring Framework (Spring Boot, Spring Cloud, Spring Integration and Spring Web) (more than 2 years)
    • Testing frameworks (e.g. JUnit, PowerMock, WiresMock) (more than 2 years)
    • ORM (e.g. Hibernate) (more than 2 years)
    • RDBMS (e.g MySQL/MariaDB, PostgreSQL, Oracle) (more than 2 years)
    • Key-value storages (e.g. Redis, Memcached)
    • Solid experience with message brokers – RabbitMQ, ActiveMQ etc
    • Web Servers
    • Version control systems (GIT)
    • Strong understanding of Docker and containerization
    • Experience with CI/CD – (we are currently using GitLab, but any other system like Bitbucket, Bamboo, Jenkins etc. will also count)
    • Builders
    • Experience in supporting production systems, analyzing logs, dashboards etc. (we are currently using the ELK stack)
  • Experience with:
    • Troubleshooting, profiling and debugging applications
    • Creation software architecture and design of complex applications, platforms, microservices solutions
    • Agile software processes and technologies
    • Code Review process
    • Refactoring process
  • Fluent or Upper-Intermediate English is a must


  • Knowledge and experience in Groovy
  • Cloud computing platforms (Google Cloud Platform)
  • Experience with Kafka
  • Experience with Event-Driven systems, Event sourcing, CQRS
  • Experience with Container Orchestration tools (we are currently using Kubernetes and Nomad)
  • Certifications on:
    • Java
    • Spring Frameworks
    • Cloud computing platforms (AWS, GCP, Microsoft Azure)
  • Knowledge in Deployment patterns
  • Practical commercial experience with:
    • Serverless architecture
    • Integration with 3rd party solutions
    • NoSQL (e.g. MongoDB, ElasticSearch, CouchDB)
    • Experience with Search Engines (e.g. ElasticSearch, Azure Search, Apache Solr)
    • Provisioning tools (e.g. Terraform, Ansible)
    • Quality tools (e.g. SonarQube)
  • Past working experience in a Gambling/Casino company or understanding the Gambling/Casino business domain
  • Understanding of React/Redux or a relevant experience

You can:

  • Perform a broad range of complex technical or professional activities, in a variety of contexts. Investigate, define and resolve complex issues
  • Able to work in distributed cross-functional teams effectively
  • Influence customers and team members on the project level
  • May supervise others or make decisions which impact the work assigned to individuals or phases of projects
  • Plan, schedule and monitor own work (and of others where applicable) competently
  • Have learning agility (readiness for challenge and being open to change)

What's in it for you

  • Career growth opportunities
  • Realization of your innovative ideas in building new Ciklum Solutions and Services
  • Friendly collaborative teams and an enjoyable working environment
  • Professional skills development and training programs
  • Variety of knowledge sharing, training and self-development opportunities
  • State of the art, cool, centrally located offices with a warm atmosphere which creates really good working conditions

Your dream job isn’t here? Let’s stay in touch! We’ll inform you about the best opportunities.


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