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Ciklum is a software development and IT outsourcing firm that hires engineers for client-facing projects and billable hours rather than internal product development.

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Posted 6d ago

Senior JavaScript Engineer

@ Ciklum
View All Jobs
Ukraine
RemoteFull Time
Responsibilities:designing solutions, implementing applications, coaching engineers
Requirements Summary:Experience designing complex web solutions, MicroFrontend architecture, advanced React/TypeScript/JavaScript skills, CI/CD pipeline and DevOps collaboration, testing and code quality tools, and cloud/serverless knowledge.
Technical Tools Mentioned:Amazon-Q, GitHub Copilot, Claude Code, HTML, CSS, JavaScript, ReactJs, TypeScript, npm, SCSS, TravisCi, GitLabCI, Rollup, Esbuild, SWC, Docker, GitLab, DataDog, Shell, Jest, ESLint, SonarQube, AWS CDK, CloudFormation, Postman, Chrome DevTools, Figma, Zeplin, Sketch, NodeJS
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Job Description

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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