Senior JavaScript Engineer

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 engineering experiences of tomorrow.

Responsibilities:

• Planning and developing new engineers-facing products and features
• Building robust and scalable software components and services
• Optimizing applications to maximize speed and scalability
• Ensuring the technical feasibility of UI/UX designs
• Collaborating with other team members and stakeholders
• Taking a flexible, proactive approach to your work

Requirements:

• Core Stack: Strong proficiency with TypeScript, React, Node.js, and web standards (semantic HTML, CSS, JS APIs)
• Quality & Modern Workflows: Commitment to high code quality using linters, automated test suites (e.g., Vitest), and modern AI/agentic coding tools to accelerate workflows
• Performance & Bundling: Understanding of client-side performance, code-splitting, and asset optimization for statically served applications
• Full-Stack Mindset: Basic familiarity with backend development, understanding REST APIs, and a willingness to touch full-stack code
• Product & UX Focus: Experience collaborating closely with designers, sharp attention to visual detail, and a user-centric product mindset 

Desirable:

• Modern SPA Stack: Experience with Vite, TanStack Query, TanStack Router, and Zustand
• Design Systems: Experience consuming, and building component libraries using Web Components
• Micro-Frontend Architecture: Exposure to or hands-on experience with micro-frontends using Single-SPA

Personal skills:

• 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
• Plan, schedule and monitor your own work competently
• Have learning agility (readiness for challenge and being open to change)
• Confident Intermediate English (or higher) is a must

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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