Senior UI Developer

📍 Job Overview

Job Title: Senior UI Developer

Company: ESET

Location: Bratislava, Slovakia (with opportunities in Brno, Košice, and Prague)

Job Type: Full-time

Category: Software Engineering / Front-End Development

Date Posted: 2026-04-30

Experience Level: Mid-Senior (5-10 years)

Remote Status: Hybrid

🚀 Role Summary

• Design and implement a modern, scalable, and high-performance user interface for ESET's cutting-edge OpenXDR security platform.

• Visualize complex security data from endpoint, cloud, email, identity, and network domains, enabling seamless user interaction.

• Integrate AI-powered features into the user interface to enhance proactive security capabilities.

• Collaborate with backend teams to ensure efficient data flow and integration using technologies like gRPC.

• Focus on delivering an intuitive and user-friendly experience for security professionals.

📝 Enhancement Note: While the title is "Senior UI Developer," the core responsibilities and required technologies (TypeScript, React, gRPC, AI integration) suggest a role deeply embedded within a product development team focused on delivering sophisticated security solutions. This is not a purely aesthetic UI role but one that requires strong technical acumen in building complex, data-intensive applications. The "OpenXDR platform" context indicates a focus on Extended Detection and Response, a critical area in modern cybersecurity.

📈 Primary Responsibilities

• Develop and maintain a modern, responsive, and scalable user interface for the OpenXDR platform using TypeScript and React.

• Architect and implement component-based UI solutions, ensuring code reusability, maintainability, and adherence to best practices.

• Manage application state effectively using state management libraries such as Redux, Zustand, or similar, to handle complex data flows.

• Integrate front-end components with backend services via gRPC, ensuring efficient data retrieval and display.

• Design and implement effective data visualizations for complex security data, leveraging appropriate libraries to handle large datasets.

• Collaborate closely with product managers, UX designers, and backend engineers to translate requirements into robust front-end features.

• Optimize front-end application performance for speed, scalability, and responsiveness, particularly when dealing with real-time security data.

• Write clean, well-documented, and testable code, contributing to comprehensive unit and integration testing strategies.

• Explore and integrate AI-driven features and tools (e.g., Copilot) into the development workflow and potentially into the user-facing product.

• Participate actively in Agile/Scrum ceremonies, including sprint planning, daily stand-ups, and retrospectives, contributing to continuous process improvement.

📝 Enhancement Note: The responsibilities highlight a blend of core front-end development, architectural design, state management expertise, and specific integration skills (gRPC, AI). The emphasis on "visualizing complex security data" and "integrations with AI-powered features" points to a challenging and specialized front-end role within a cybersecurity context.

🎓 Skills & Qualifications

Education:

Experience:

• Minimum of 5 years of professional experience in front-end development, with a proven track record of building complex, data-driven web applications.

Required Skills:

• TypeScript: Strong proficiency in TypeScript for building robust and maintainable JavaScript applications.

• React: Deep expertise in React for developing modern, component-based user interfaces.

• State Management: Solid understanding and practical experience with state management libraries (e.g., Redux, Zustand, Context API).

• gRPC: Experience integrating with backend services using gRPC for efficient communication.

• HTML5 & CSS3: Advanced knowledge of semantic HTML and modern CSS for responsive and accessible web design.

• Responsive Design: Proven ability to create UIs that adapt seamlessly across various devices and screen sizes.

• Data Visualization: Experience with data visualization libraries (e.g., D3.js, Chart.js, Plotly.js) and handling large datasets in the UI.

• Performance Optimization: Familiarity with front-end performance optimization techniques (e.g., code splitting, lazy loading, efficient rendering).

• Clean Code Principles: Ability to write clean, maintainable, and testable code following established software development best practices.

• Modern UI Architecture: Strong understanding of modern UI design patterns, component-based architecture, and design systems.

Preferred Skills:

• GWT (Google Web Toolkit): Familiarity with GWT, indicating potential for working with legacy or specialized systems within the company.

• Cloud Platforms: Experience with cloud environments, particularly AWS, for deployment or integration purposes.

• Security Concepts: Understanding of cybersecurity principles or prior experience working on security-related products.

• Agile/Scrum: Experience working within Agile methodologies and Scrum frameworks.

• AI Development Tools: Familiarity with AI tools like GitHub Copilot or similar AI assistants for development.

📝 Enhancement Note: The combination of required skills points to a highly technical front-end role. The emphasis on TypeScript, React, state management, and gRPC suggests a need for developers who can build complex, performant, and data-intensive applications. The inclusion of AI tools and security concepts as preferred skills further refines the ideal candidate profile for this specialized cybersecurity platform.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Case Studies of Complex Web Applications: Showcase 2-3 significant projects where you were instrumental in developing the front-end architecture and user experience for complex web applications.

• Data Visualization Examples: Include specific examples or links to projects demonstrating your ability to visualize large or complex datasets effectively within a UI. Highlight the libraries and techniques used.

• Component-Based Design Showcase: Provide examples of reusable UI components you have designed and implemented, illustrating your approach to modularity and maintainability.

• Performance Optimization Documentation: Detail a project where you significantly improved front-end performance. Quantify the improvements (e.g., load times, responsiveness) and explain the methods used.

• Integration Experience: If possible, include a project that showcases integration with backend services, particularly if it involved APIs or similar communication protocols.

Process Documentation:

• Workflow Design & Optimization: Be prepared to discuss how you approach designing user workflows for complex applications and how you identify and implement optimizations.

• System Implementation Standards: Articulate your understanding of best practices for implementing UI systems, including considerations for scalability, maintainability, and security.

• Measurement & Performance Analysis: Demonstrate how you measure the success of your UI implementations, focusing on user engagement, performance metrics, and bug reduction.

📝 Enhancement Note: For a Senior UI Developer role, especially one involving complex data visualization and AI integration on a security platform, a portfolio that highlights technical depth, architectural thinking, and quantifiable results is crucial. The emphasis should be on the how and why behind your technical decisions, not just the final product.

💵 Compensation & Benefits

Salary Range:

• Estimated Base Salary: 3,200 EUR - 5,000+ EUR per month (Brutto)

• Explanation: The provided base wage component starts at 3,200 EUR brutto per month. Based on the "Senior" title, 5+ years of experience, and the demand for specialized skills like TypeScript, React, gRPC, and data visualization in a cybersecurity context, a competitive range for a senior role in Bratislava would typically extend significantly higher. The final salary is subject to individual skills and experience.

• Performance Bonus: Up to 10% of the basic salary, paid twice per year (performance-based, typically evaluated over 6-month periods).

Benefits:

• Health & Well-being:

  • BenefitPlus program
  • Healthcare services (check-ups/annual programs)
  • Multisport card for fitness activities
  • Travel card ("električenka") for public transport
  • Supplementary pension saving contributions
  • Sick days policy

• Family Support:

  • Marriage allowance
  • Childbirth allowance
  • Parental contribution
  • ESET family events (Family Day, St. Nicholas)

• Office Perks:

  • Refreshments in the office (fruits, coffee, soft drinks)
  • "Let's get together" breakfast events
  • Access to activity rooms and quiet rooms
  • ESET company events (e.g., Žranica, Christmas party) and team-building activities

• Other:

  • Loyalty allowance and extra loyalty days off
  • Loyalty cake and glass award for long-term commitment
  • Refer-a-friend bonus program
  • Christmas presents for employees

Working Hours:

• Full-time employment, typically around 40 hours per week.

• Hybrid work arrangement, allowing for a balance between in-office collaboration and remote flexibility.

📝 Enhancement Note: The base salary of 3,200 EUR brutto is a starting point. For a Senior UI Developer in Bratislava with the specified skills, the market rate can often reach 4,000-5,000 EUR or more, depending on the depth of experience and specific technical expertise. The bonus structure and comprehensive benefits package add significant value beyond the base salary. The "LI-Hybrid" tag confirms the hybrid nature of the role.

🎯 Team & Company Context

🏢 Company Culture

Industry: Cybersecurity Software. ESET is a global leader in cybersecurity, known for its innovative antivirus and threat detection solutions. The company operates in a dynamic and highly competitive technology sector, requiring continuous adaptation and cutting-edge development.

Company Size: ESET is a large, established technology company with a global presence. This implies structured processes, robust HR support, and opportunities for career advancement within a large organization.

Founded: ESET was founded in 1992, signifying a long history of experience and stability in the cybersecurity market. This longevity suggests a strong foundation, deep industry knowledge, and a resilient business model.

Team Structure:

• OpenXDR Platform Team: This team is focused on developing and enhancing ESET's OpenXDR solution, a critical component of their cybersecurity offering.

• Cross-Functional Collaboration: The Senior UI Developer will work closely with backend engineers, product managers, UX designers, AI specialists, and potentially security analysts.

• Reporting: Likely reports to a Development Manager or Engineering Lead responsible for the OpenXDR front-end.

Methodology:

• Agile/Scrum: The team operates within an Agile/Scrum framework, emphasizing iterative development, frequent feedback, and continuous improvement.

• Data-Driven Development: Decisions are informed by data, user feedback, and performance metrics, particularly crucial for a security platform dealing with complex data.

• Focus on Scalability and Performance: Given the nature of cybersecurity platforms, there's a strong emphasis on building solutions that are scalable, performant, and reliable under heavy load.

Company Website: https://www.eset.com/

📝 Enhancement Note: ESET's established presence in cybersecurity suggests a culture that values innovation, technical excellence, and a commitment to security. The company size offers stability and growth potential, while the team structure points to a collaborative, cross-functional development environment focused on a high-impact product.

📈 Career & Growth Analysis

Operations Career Level: Senior UI Developer. This level signifies a high degree of technical expertise, autonomy, and responsibility. The role is expected to contribute significantly to architectural decisions, mentor junior developers, and drive the implementation of complex features. In a GTM context, this role is crucial for ensuring the product's usability and effectiveness, directly impacting customer adoption and satisfaction.

Reporting Structure: The Senior UI Developer will likely report to a Lead Developer or Engineering Manager overseeing the OpenXDR platform's front-end development. They will collaborate extensively with cross-functional teams, including product management, backend engineering, and UX/UI design.

Operations Impact: The UI is the primary interface through which customers interact with ESET's OpenXDR platform. A well-designed, intuitive, and performant UI directly impacts:

• Customer Adoption & Retention: Ease of use encourages wider adoption and reduces churn.

• Operational Efficiency: Clear data visualization and intuitive controls help security analysts detect threats faster and respond more effectively.

• Product Perception: The UI is a key differentiator and reflects the quality and sophistication of ESET's technology.

• AI Feature Adoption: Seamless integration of AI features through the UI is critical for users to leverage advanced capabilities.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced front-end technologies, state management, data visualization, or explore specific areas like performance engineering or accessibility.

• Architectural Leadership: Progress into roles like Lead UI Developer or Front-end Architect, taking ownership of the UI's technical direction and strategic planning.

• Mentorship & Team Lead: Mentor junior developers, lead feature development efforts, and potentially move into a team lead or management position.

• Cross-Functional Expansion: Gain exposure to backend systems, cloud infrastructure (AWS), or even product management within the cybersecurity domain.

• Security Domain Expertise: Develop specialized knowledge in cybersecurity concepts, enhancing value in this niche.

📝 Enhancement Note: This role offers a clear path for technical growth within a specialized and high-demand field. The "Senior" designation implies significant opportunities for leadership, mentorship, and architectural influence, making it an attractive position for experienced front-end engineers looking to make a substantial impact.

🌐 Work Environment

Office Type: ESET offers a hybrid work model, combining the benefits of in-office collaboration with the flexibility of remote work. This allows for team synergy and focused individual work.

Office Location(s):

• Primary: Bratislava, Slovakia

• Additional: Brno, Košice (Slovakia), Prague (Czechia)

Workspace Context:

• Collaborative Environment: The office setup likely includes meeting rooms, open collaboration spaces, and potentially dedicated areas for team discussions, facilitating seamless interaction with colleagues.

• Tools & Technology: Access to up-to-date development hardware and software, including high-performance workstations necessary for complex development tasks.

• Team Interaction: Opportunities for spontaneous discussions, knowledge sharing, and pair programming with fellow developers and team members.

Work Schedule: Full-time employment with a hybrid arrangement. While core working hours are expected, the hybrid model typically allows for some flexibility in scheduling individual workdays and hours, balanced with team needs and in-office days.

📝 Enhancement Note: The hybrid model is a significant draw for modern developers, offering a balance of focused work and team interaction. The presence of multiple office locations suggests a well-established company infrastructure capable of supporting diverse teams and work arrangements.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: HR or recruiter call to assess basic qualifications, cultural fit, and interest in the role.

• Technical Interview 1 (Coding Challenge): A practical coding exercise, likely focused on TypeScript/React, state management, or algorithmic problem-solving, potentially conducted live or as a take-home assignment. Be prepared to discuss your approach and trade-offs.

• Technical Interview 2 (Architecture & System Design): Discussion of your experience with UI architecture, component design, state management strategies, and integration with backend services (like gRPC). You may be asked to design a UI for a hypothetical complex feature.

• Portfolio Review & Discussion: Presentation of your portfolio, focusing on 1-2 key projects. Be ready to explain your role, technical decisions, challenges faced, and outcomes achieved, especially regarding data visualization and performance.

• Hiring Manager / Team Lead Interview: Focus on team fit, career aspirations, problem-solving approach, and understanding of the OpenXDR platform's goals.

• Final Interview (Optional): May involve senior leadership or a final technical deep dive.

Portfolio Review Tips:

• Focus on Impact: Clearly articulate the business value and impact of your projects. Quantify results whenever possible (e.g., "reduced load time by 30%", "improved user task completion rate by 15%").

• Technical Depth: Be prepared to explain why you made certain technical choices (e.g., choice of state management library, architectural patterns used, specific CSS techniques).

• Showcase Data Visualization: If data visualization is a key requirement, ensure your portfolio prominently features relevant examples and highlights your approach to handling complex data.

• Clean Code & Maintainability: Briefly touch upon how you ensure code quality, testability, and maintainability in your projects.

• Tailor to the Role: Emphasize projects that align with building complex, data-intensive applications, ideally with elements of real-time data or advanced UI features.

Challenge Preparation:

• TypeScript & React Proficiency: Practice common React patterns, state management techniques (Redux/Zustand), and TypeScript features.

• Data Structures & Algorithms: Refresh knowledge on fundamental data structures and algorithms, as these are often tested in coding challenges.

• System Design: Prepare to discuss how you would design a scalable and performant UI for a complex application, considering factors like data fetching, state management, and rendering.

• gRPC Integration: Understand the principles of gRPC and how it's used for client-server communication.

• Problem-Solving: Practice breaking down complex problems into smaller, manageable parts and articulating your thought process clearly.

📝 Enhancement Note: The interview process is designed to thoroughly assess technical skills, architectural thinking, and problem-solving abilities. A strong portfolio that clearly demonstrates experience with complex UIs, data visualization, and performance optimization, along with the ability to articulate technical decisions, will be key to success.

🛠 Tools & Technology Stack

Primary Tools:

• TypeScript: The core language for modern JavaScript development, ensuring type safety and code robustness.

• React: The primary JavaScript library for building user interfaces, known for its component-based architecture and declarative programming model.

• State Management: Libraries like Redux, Zustand, or React's Context API are essential for managing complex application state efficiently.

• gRPC: A high-performance, open-source framework for Remote Procedure Calls, used for efficient client-server communication.

• HTML5 & CSS3: Fundamental web technologies for structuring and styling web applications.

• Responsive Design Frameworks/Libraries: Potentially used for rapid development of responsive layouts (e.g., Tailwind CSS, Material UI, Bootstrap, though custom CSS is also likely).

Analytics & Reporting:

• Data Visualization Libraries: Tools such as D3.js, Chart.js, Plotly.js, or custom SVG/Canvas implementations for displaying complex security data.

• Performance Monitoring Tools: Browser developer tools (e.g., Chrome DevTools Performance tab), Lighthouse, or specialized APM tools for front-end performance analysis.

• Testing Frameworks: Jest, React Testing Library, Cypress, or similar for unit, integration, and end-to-end testing.

CRM & Automation:

• Version Control: Git, used with platforms like GitHub, GitLab, or Bitbucket for code management and collaboration.

• Build Tools: Webpack, Vite, or similar for bundling, transpiling, and optimizing front-end assets.

• AI Development Assistants: Tools like GitHub Copilot may be used to enhance developer productivity.

• Cloud Platforms (Preferred): Familiarity with AWS or other cloud providers, potentially for deployment, CI/CD pipelines, or integration with cloud-based services.

📝 Enhancement Note: The technology stack is modern and geared towards building sophisticated, high-performance web applications. Proficiency in TypeScript, React, and state management is non-negotiable. Experience with gRPC and data visualization is highly valued given the role's focus on integrating with backend systems and representing complex security data.

👥 Team Culture & Values

Operations Values:

• Innovation: ESET fosters a culture of continuous innovation to stay ahead in the rapidly evolving cybersecurity landscape. This means embracing new technologies and creative problem-solving.

• Technical Excellence: A strong emphasis on writing high-quality, performant, and maintainable code. There's a drive for technical mastery and best practices.

• Collaboration: Teamwork is paramount. Developers are expected to work effectively with cross-functional teams, share knowledge, and support each other.

• Customer Focus: While a technical role, the ultimate goal is to deliver value to customers. Understanding user needs and translating them into effective UI solutions is key.

• Integrity & Security: Given the nature of ESET's business, there's an inherent value placed on integrity, data security, and building trustworthy products.

Collaboration Style:

• Agile & Iterative: Collaboration occurs within an Agile framework, with regular stand-ups, sprint reviews, and retrospectives to ensure alignment and continuous improvement.

• Open Communication: Encourages open dialogue, constructive feedback, and knowledge sharing among team members.

• Cross-Functional Integration: Developers work closely with product managers, designers, and backend engineers, fostering a holistic approach to product development.

• Mentorship: Senior members are expected to mentor junior developers, contributing to team growth and knowledge dissemination.

📝 Enhancement Note: ESET's culture likely values technical prowess, a proactive approach to problem-solving, and a strong sense of teamwork. For a Senior UI Developer, demonstrating these values through contributions, communication, and a commitment to quality will be important for cultural integration.

⚡ Challenges & Growth Opportunities

Challenges:

• Complexity of Security Data: Visualizing and interacting with complex, high-volume security data in real-time presents significant UI/UX challenges.

• Integration with AI Features: Seamlessly integrating AI-powered insights and controls into the UI requires careful design and technical execution to ensure user comprehension and trust.

• Performance Optimization: Maintaining high performance for a feature-rich application, especially with large datasets, demands continuous optimization efforts.

• Cross-Functional Dependencies: Balancing the needs and timelines of various teams (backend, product, UX) requires strong communication and negotiation skills.

• Keeping Pace with Technology: The front-end landscape evolves rapidly; staying current with best practices and new technologies is an ongoing challenge.

Learning & Development Opportunities:

• Advanced TypeScript & React Techniques: Opportunities to master advanced patterns, performance tuning, and new features within these core technologies.

• Data Visualization Expertise: Deepen skills in creating sophisticated and interactive data visualizations for complex domains.

• Cybersecurity Domain Knowledge: Develop a strong understanding of cybersecurity concepts, threats, and detection methodologies, becoming a valuable asset in this specialized field.

• gRPC & Backend Integration: Gain deeper experience in integrating front-end applications with high-performance backend services.

• Cloud Technologies: Potential to learn or expand knowledge in cloud platforms like AWS, relevant for modern application deployment and scaling.

• Architectural Leadership: Develop skills in UI architecture, design systems, and technical strategy through mentorship and project leadership.

📝 Enhancement Note: The challenges presented are inherent to developing cutting-edge cybersecurity software. Overcoming them offers significant opportunities for professional growth, skill development, and specialization in a high-demand field.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to visualize a large or complex dataset in a user interface. What was your approach, what tools did you use, and what were the key challenges?"

• "How would you design a UI component for real-time threat detection alerts, ensuring it's informative, actionable, and doesn't overwhelm the user?"

• "Imagine integrating an AI-powered anomaly detection feature into our platform. How would you design the user experience to build trust and effectively communicate the AI's findings?"

• "Walk me through a project where you significantly improved front-end performance. What metrics did you focus on, and what techniques did you employ?"

Company & Culture Questions:

• "What interests you about ESET and our OpenXDR platform specifically?"

• "How do you stay updated with the latest front-end technologies and best practices?"

• "Describe your ideal team environment and how you contribute to a collaborative culture."

• "What are your thoughts on working in a hybrid environment?"

Portfolio Presentation Strategy:

• Select Relevant Projects: Choose 2-3 projects that best showcase your skills in React,

TypeScript, complex UI development, and ideally, data visualization or performance optimization.

• Structure Your Narrative: For each project, clearly state:

  • The problem you were solving.
  • Your specific role and contributions.
  • The technologies used and why.
  • Key technical challenges and how you overcame them.
  • The quantifiable results or impact of your work.

• Showcase Code Quality: If possible, briefly highlight aspects of your code that demonstrate maintainability, testability, or clean architecture.

• Prepare for Deep Dives: Be ready to answer detailed questions about your technical decisions, architecture, and problem-solving approaches.

• Connect to ESET: Frame your experience in a way that highlights how it aligns with the requirements and goals of the Senior UI Developer role at ESET.

📝 Enhancement Note: Preparation should focus on articulating technical expertise with clear examples, demonstrating problem-solving skills, and showcasing an understanding of how UI development contributes to product success and business goals, especially in the cybersecurity domain.

📌 Application Steps

To apply for this Senior UI Developer position:

• Submit your application through the provided link on the ESET careers portal.

• Tailor Your Resume: Highlight your 5+ years of front-end development experience, specifically mentioning TypeScript, React, state management (Redux/Zustand), gRPC integration, and experience with data visualization and performance optimization. Use keywords from the job description.

• Curate Your Portfolio: Select your strongest projects that demonstrate complex web application development, sophisticated UI architecture, and effective data visualization. Prepare to walk through 1-2 key projects during the interview, focusing on your technical contributions and the impact of your work.

• Prepare for Technical Interviews: Practice coding challenges involving TypeScript and React. Be ready to discuss UI architecture, state management, and performance optimization strategies. Review concepts related to gRPC and data visualization libraries.

• Research ESET and the OpenXDR Platform: Understand ESET's mission, its position in the cybersecurity market, and the goals of the OpenXDR platform. This will help you ask informed questions and demonstrate genuine interest.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.