Senior JavaScript Engineer

Ciklum is looking for a Senior JavaScript Engineer to join our team full-time in Slovakia.

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.

You will be working for a Data Platform that sets the standard for engineering excellence with a high-performance software solution built on Node.js, React, and TypeScript. It transforms complex product ideation into scalable backend architectures that make RESTful APIs and cloud-native features run faster, work more reliably, and deliver low-latency experiences for the global fintech market.

Responsibilities

Take involvement and ownership of all aspects of product development, from ideation through architecture to implementation, testing, and continuous deployment

Work closely with developers, product managers, and other stakeholders to ensure smooth integration and timely delivery of features

Lead the design and implementation of RESTful APIs to enable seamless integration with various internal and external systems

Optimize application performance to ensure low latency, high availability, and reliability

Participate in design and code reviews and ensure adherence to coding standards and best practices

Conduct thorough testing of backend components, write automated tests, and ensure high code quality and reliability

Identify and address bottlenecks, bugs, and performance issues within the backend infrastructure

Stay up-to-date with industry trends, emerging technologies, and best practices to continually improve the development process

Contribute to the overall technical strategy and architecture of the product

Drive engineering excellence across the team, setting the standard for code quality, testing, scalability, and security

Requirements

5+ years of professional experience in software development with strong expertise in Node.js, React, and TypeScript

Strong hands-on coding skills with a passion for building scalable, reliable, and maintainable systems

Solid understanding of software architecture, design patterns, and modern development practices (Agile, CI/CD, DevOps)

Experience with RESTful API design and development

Strong problem-solving skills and excellent communication abilities

Comfortable in a fast-paced, dynamic environment where priorities can shift quickly

Desirable

Experience in fintech, payments, or financial services

Familiarity with cloud platforms such as AWS, Azure, or GCP

Experience working with microservices or event-driven architectures

What`s in it for you?

Strong community: Work alongside top professionals in a friendly, open-door culture that values initiative and empowers its people to succeed

Fast-paced & agile environment: Be part of a dynamic, fast-moving organization that champions efficiency and innovation

Global exposure: Collaborate with international, cross-functional teams and contribute to large-scale initiatives

Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications

Flexibility: Balance office and remote work to fit your rhythm

Care: Take advantage of our extensive benefits offering, aligned with the best market standards The salary starts from 3300 Euro gross. The final salary depends on the previous experience and professional knowledge of the candidate.

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.

Our Slovakia hub brings together passionate professionals working on global initiatives. Be part of a close-knit team that’s driving digital transformation and creating lasting impact.

Want to learn more about us?

Follow us on Instagram, Facebook, LinkedIn, stop by one of our IT meetups Nalejvárna.

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.