Ciklum is looking for a Senior JavaScript Engineer 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 JavaScript Engineer, become a part of a cross-functional development team working for the global leader in leisure, travel, and tourism industries that offers a high-quality end-to-end customer experience, from booking to accommodation and transportation.
Responsibilities:
Design and implement complex web applications using the established approaches and best practices
Improve existing engineering and quality standards in a team and help other team members adopt them
Create CI/CD pipeline by template and/or assist DevOps team in creating more complex pipelines
Participate in the hiring process and technical interview activities
Coach/supervise middle/junior engineers by demand of the project
Requirements:
We know that sometimes, you can’t tick every box. We would still love to hear from you if you think you’re a good fit!
Experience in designing solutions for complex features and creating documentation
Strong experience with MicroFrontend architecture
Strong experience in using AI coding assistants like Amazon-Q or similar (Github Copilot, Claude Code)
Uses the established standards and algorithms for implementing the application
SOLID / GRASP principles
Architectural Diagram Literacy (e.g., C4 model, Basic UML)
Data Structures and Formats
Common algorithms
Web Scaling Essentials (e.g., Load Balancers, Caching strategies, CDN)
Serverless / Microservices / Modular Monolith
CDN (Content Delivery Network)
Software Development:
Proficient in HTML, CSS, and JavaScript
Practical use of advanced features in React
Experience in refactoring existing applications according to new requirements
TypeScript
Browsers (DOM, Storages, Events)
WebComponents
Package management (npm)
ReactJs / Preact
CSS Preprocessors (SCSS)
Responsive and Adaptive Design Layout
Accessibility
UI Performance Optimization (Web Vitals)
Experience in configuring CI/CD pipelines (TravisCi, GitLabCI, etc.)
Collaborates with the DevOps team to set up the custom CI/CD pipeline
Bundlers & Builders (Rollup or Esbuild or SWC)
Docker
GitLab (MR, Pipeline, UI, Configuration, Tokens)
Branching strategies
DataDog
Monitoring and Logging tools
Downtime forecast
Shell script basics
Continuous Integration / Continuous Deployment / Continuous Delivery
Quality Assurance:
Hands-on experience with testing approaches and tools
Ability to adjust and maintain the code quality rules and metrics
Automated tests (unit, integration, e2e tests)
Common manual test practices
Jest or similar
Static code analysis: (ES)Lint
Code review
SonarQube
API Contract Testing
SDLC:
Agile (Principles, Scrum, Kanban)
Tech Risk Management
Technical Debt Management (Refactoring, Improvements)
Cloud:
Serverless in AWS
AWS CDK / CloudFormation
Dev Tools:
Modern IDEs (setup plugins, configuration)
Postman or similar
DevTools (Chrome DevTools or similar)
UI Design Tools (e.g., Zeplin, Figma, Sketch)
Security:
NodeJS Security (npm audit, vulnerability scanners)
Web Security (XSS, CSRF, CSP, Injections)
Personal skills:
Works under general direction, accepts guidance and has work reviewed at agreed milestones
Has working-level contact with customers and colleagues
May supervise others or make decisions which impact the work assigned to individuals or phases of projects
Performs a range of work, sometimes complex and non-routine
Demonstrates effective communication skills
Plans, schedules and monitors own work (and that of others where applicable) competently
Contributes fully to the work of teams
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.
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