Senior Software Engineer (Unique)

Ciklum is looking for a Senior Software Engineer (Unique) 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 a Senior Software Engineer (Unique), become a part of a cross-functional development team engineering experiences of tomorrow. On behalf of Ciklum Digital Engineering Team, we are looking for a Senior Java Developer to join the team on a full-time basis. 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
Taking part in the decision-making process in application code design, solution development, 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
Strong knowledge in Computer Science, Computing Theory:
Paradigm & Principles (OOP, SOLID)
Database theory (RDBMS)
Code testing practices
Algorithms
Data structures
Design Patterns
Understanding of network interactions
protocols
conventions (e.g., REST, RPC);
authentication and authorization flows
standards and practices (e.g., OAuth, JWT)
Strong knowledge and experience in Java (more than 5 years)
Knowledge of Kotlin / Reactive programming experience (Spring Boot)
Good knowledge and experience in Golang
Experience with REST API design and development
Experience with Microservices architecture
Event-driven architecture fundamental
Experience building high-traffic/high-load distributed systems
Experience with Synchronous/Asynchronous API Orchestration
Proven expertise in performance optimization and scalability
Experience analyzing production performance and latency issues
Experience with resilience patterns (circuit breakers, retries, timeouts)
Understanding of Domain Driven Design
Big Plus: Ops insights, comfortable with Linux, command lines, Kubernetes
Testing frameworks (e.g., JUnit, PowerMock, WiresMock)
ORM (e.g., Hibernate)
RDBMS (e.g MySQL/MariaDB, PostgreSQL, Oracle)
Web Servers
Version control systems (GIT)
Docker
Continuous Integration tools (e.g. Gitlab Pipeline, Jenkins, TeamCity, Bamboo)
Builders
Plus: Node.js / Typescript experience (for AWS Lambda)
Plus: AWS experience (Aurora, Lambda, Step Functions, etc.)
Experience with:
Agile software processes and technologies
Code Review process
Refactoring process
Upper-Intermediate English
Desirable
Knowledge in:
TDD, BDD
Architectural, Enterprise Patterns
Security patterns, Common attacks types (OWASP)
Deployment patterns
Practical commercial experience with
Key-value storages (e.g.

Redis, Memcached)
Messaging systems (e.g. RabbitMQ, Apache Kafka, ActiveMQ, AWS SQS, Azure
Service Bus, Google Pub/Sub)
Cloud solutions (e.g. AWS, Google Cloud Platform, Microsoft Azure)
Serverless architecture
Integration with 3rd party solutions
NoSQL (e.g.

MongoDB, ElasticSearch, CouchDB)
Search Engines (e.g. ElasticSearch, Azure Search, Apache Solr)
Quality tools (e.g. SonarQube)
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. 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.
#LI-NO1