Expert Java Developer

Ciklum is looking for an Expert Java Developer to join our team full-time in Ukraine.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As an Expert Java Developer, become a part of a cross-functional development team engineering experiences of tomorrow. You will join a highly motivated team and will be working on a modern solution for our existing client. We are looking for technology experts who want to make an impact on new business by applying best practices and taking ownership. 

Responsibilities:

• Back-end development to meet customer's business needs and implement components according  to modern software development environment (cloud-based platforms, microservice architecture,  etc.)
• Taking part in the decision-making process in design application architecture, solution  development, architecture and code review
• Develop and review feature design documents and provide inputs/update to specifications for the  solution
• Design and implement a set of various types of tests (unit, integration, functional, etc)
• Proactive position in solution development, processes improvements
• Working in an international distributed team in an Agile environment
• Communicate with PMs, engineers, Architects, QA and other colleagues and stakeholders
• Delivering the product roadmap and plannings
• To use high coding standards, software best practices and write highly testable, automatable and  performant code over the whole SDLC

Requirements: 

• 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, including familiarity with AI-assisted testing and debugging
  • Algorithms
  • Data structures
  • Architectural, Enterprise and Design Patterns
  • Security patterns, Reverse engineering resistance, Common attacks types (OWASP)
• 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 Java (more than 3 years)
• AWS proven knowledge and experience:
  • AWS Certification: Must hold at least AWS Certified Developer – Associate or AWS Certified Solutions Architect – Associate credential
  • Core AWS Services: Strong hands-on experience with EC2, S3, RDS, Lambda, and IAM
• Advanced AWS Services:
  • Amazon Cognito: Expertise in implementing secure user authentication and authorization for Java applications
  • AWS Systems Manager Parameter Store: Ability to manage application configuration and secrets securely
  • Amazon DynamoDB: Experience designing and optimizing NoSQL data models, implementing high performance queries, and handling scalability
  • Amazon SNS & SQS: Proficiency in building event-driven architectures and asynchronous messaging patterns using SNS topics and SQS queues.
  • Containerization & Orchestration: Hands-on experience with AWS container services such as ECS, EKS, or Fargate, and managing container images using ECR (Elastic Container Registry)
• Security Best Practices: Knowledge of encryption, IAM roles/policies, and VPC configurations
• Cost Optimization: Ability to design cost-efficient solutions leveraging AWS pricing models and monitoring tools
• Hands-on experience with Event-Driven Architecture (EDA) principles and implementation
• Familiarity with contract definition tools and standards like JSON Schema, Avro, OpenAPI, or similar specifications, including experience with code generation from these specs
• Proven experience in designing, implementing, and operating microservices at scale
• Experience with high-performance and high-load systems
• Practical commercial experience with:
  • REST API development
  • Web application frameworks (e.g. Spring Boot Framework)
  • Testing frameworks (e.g. JUnit, PowerMock, WiresMock) (more than 2 years), including leveraging AI tools to generate and maintain test cases
  • 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)
  • Messaging systems (e.g. RabbitMQ, Apache Kafka, Active MQ, AWS SQS, Azure Service Bus, Google Pub/Sub)
  • Web Servers
  • Version control systems (GIT)
  • Docker
  • Continuous Integration tools (e.g. Gitlab Pipeline, Jenkins, TeamCity, Bamboo)
  • Builders
  • Familiarity with AI-powered developer tools (e.g., GitHub Copilot, Amazon Q, ChatGPT) to improve productivity and code quality
• Experience with:
  • Troubleshooting, profiling and debugging applications (including AI-assisted approaches)
  • Creation of software architecture and design of complex applications, platforms, microservices solutions
  • Agile software processes and technologies
  • Code Review process, with ability to critically evaluate and safely integrate AI-generated code/output
  • Refactoring process
  • Basics of prompt engineering for efficient collaboration with AI assistants
• Fluent or Upper-Intermediate English

Desirable:

• Certifications on:
  • Java
  • Spring Frameworks
• Understanding of orchestration and containerization (e.g. Kubernetes, Swarm)
• Knowledge in Deployment patterns
• Ops insights, comfortable with Linux, command lines, Kubernetes
• 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)
• / Typescript experience (for AWS lambda)
• Experience with advanced AI integration into software development lifecycle (e.g., AI-driven quality checks, documentation generation, intelligent automation)

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice
• Care: We've got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you'll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
As one of Ukraine's largest IT companies and a top employer recognized by Forbes, we've spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future.
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Explore, empower, engineer with Ciklum

Interested already? We would love to get to know you Submit your application. We can't wait to see you at Ciklum.