Senior UI Developer (IR-518)

📍 Job Overview

Job Title: Senior UI Developer (IR-518)

Company: Intellectsoft

Location: Poland

Job Type: Full-Time

Category: Software Engineering / Frontend Development

Date Posted: 2026-06-10

Experience Level: 5-10 Years

Remote Status: Fully Remote

🚀 Role Summary

• This role focuses on developing and implementing highly responsive user interface (UI) components and front-end architecture using React.js, crucial for an AI-powered platform that aids businesses in decision-making and efficiency.

• The position requires a strong command of core web technologies, including JavaScript, HTML, and CSS, to build user-friendly interfaces that are optimized for performance across various devices and browsers.

• Candidates will be responsible for writing application interface code within React.js workflows, troubleshooting interface software, and debugging application code to ensure a seamless user experience.

• The role involves optimizing components for maximum performance and documenting application changes, contributing to the continuous improvement and scalability of an innovative AI platform used in industries like healthcare.

📝 Enhancement Note: While the job title is "Senior UI Developer," the context provided by the company description and responsibilities suggests a role deeply embedded within a product development team. The focus on AI, machine learning, and data analytics for business insights indicates that this UI development role is not purely aesthetic but is integral to delivering functional, data-driven solutions. This implies a need for developers who can translate complex data visualizations and analytical outputs into intuitive user interfaces.

📈 Primary Responsibilities

• Develop and implement highly responsive user interface components using advanced React.js concepts and best practices.

• Write clean, maintainable, and efficient application interface code using JavaScript, adhering to React.js workflows and state management patterns.

• Troubleshoot and debug interface software, identifying and resolving issues to ensure optimal application performance and user satisfaction.

• Design and implement robust front-end architecture that supports complex user interface concepts and facilitates future scalability.

• Optimize UI components for maximum performance across a wide array of web-capable devices and browsers, ensuring a consistent and high-quality user experience.

• Collaborate with UX/UI designers, product managers, and backend engineers to translate design mockups and requirements into functional, interactive features.

• Document application changes, updates, and architectural decisions, contributing to the team's knowledge base and facilitating onboarding.

• Participate in code reviews, providing constructive feedback to peers and ensuring adherence to coding standards and best practices.

• Contribute to the software development lifecycle, including planning, development, testing, and deployment phases.

• Stay updated with emerging front-end technologies and industry trends, proposing innovative solutions to enhance the platform's user experience and functionality.

📝 Enhancement Note: The responsibilities highlight a blend of core UI development and architectural input. The emphasis on "highly responsive user interface components," "front-end architecture," and "optimizing components for maximum performance" suggests that this Senior UI Developer role requires more than just implementation; it involves strategic thinking about how the UI is built, scales, and performs. This is particularly relevant given the AI-powered nature of the client's product, where data visualization and complex interactions are key.

🎓 Skills & Qualifications

Education:

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a closely related technical field. Experience:

• A minimum of 5 years of commercial experience in frontend development, with a strong focus on UI development.

• Demonstrated experience in developing and implementing responsive user interfaces and front-end architectures.

• Proven track record of optimizing web application performance and ensuring cross-browser compatibility. Required Skills:

• React Expertise: Strong, in-depth knowledge and practical experience with React.js and its core principles.

• Core Web Technologies: Proficient in JavaScript (ES6+), HTML5, and CSS3.

• State Management & Tools: Proficiency in state management libraries like Redux or Flux.

• Build Tools: Experience with module bundlers and build tools such as Webpack.

• Testing Frameworks: Hands-on experience with testing tools like Enzyme for unit and integration testing of React components.

• Software Lifecycle: Solid understanding and experience with code reviews, source control (e.g., Git), build processes, and testing methodologies.

Preferred Skills:

• Advanced Frameworks: Experience with TypeScript for enhanced code quality and maintainability. Familiarity with other modern JavaScript frameworks like Angular or Vue.js.

• Architecture: Understanding and experience with micro-frontend architecture to enhance code modularity and team autonomy.

• Testing & Quality: Hands-on experience with end-to-end testing tools like Cypress.

• Specialized Tools: Knowledge of real-time communication tools like Socket.io, content management systems like Strapi CMS, or specific APIs such as 3CX APIs.

• Cross-functional Collaboration: Proven experience working effectively with UX/UI designers, Product Management, and Marketing teams.

📝 Enhancement Note: The "Nice to have skills" section is crucial for this role, particularly TypeScript and Micro-frontend Architecture. Given the seniority implied by "Senior UI Developer," candidates with experience in these areas will be highly competitive. TypeScript is becoming a standard for robust frontend applications, and micro-frontend architecture is relevant for scaling complex applications, which is often the case with AI platforms. Experience with specific tools like Socket.io highlights the need for real-time features in the product.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrated UI/UX Impact: Showcase projects where you significantly improved user interface design, responsiveness, and overall user experience, quantifiable through metrics like user engagement, task completion rates, or conversion improvements.

• React.js Project Examples: Provide detailed examples of complex applications or features built using React.js, highlighting your approach to component architecture, state management, and performance optimization.

• System Integration & Workflow: Include examples of how your frontend work integrated with backend services or APIs, demonstrating your understanding of the full application lifecycle and data flow.

• Code Quality & Best Practices: Present code samples or case studies that exemplify your adherence to software development best practices, including clean code, modularity, testing, and documentation.

Process Documentation:

• Workflow Design & Optimization: Be prepared to discuss your process for designing and optimizing front-end workflows, including how you identify bottlenecks and implement solutions for improved efficiency.

• Implementation & Automation: Showcase your methods for implementing new features and automating repetitive tasks within the development process, such as build scripts or testing procedures.

• Measurement & Performance Analysis: Demonstrate how you measure the performance of your UI components and applications, and how you use data to drive optimization efforts.

📝 Enhancement Note: For a Senior UI Developer role, a portfolio is essential. It should go beyond just showcasing visually appealing interfaces; it needs to demonstrate technical depth, problem-solving skills, and an understanding of the development lifecycle. Emphasis should be placed on projects where performance optimization, scalability, and integration with complex systems (like AI/ML platforms) were key challenges. Quantifiable results are crucial for demonstrating impact.

💵 Compensation & Benefits

Salary Range:

• Based on industry benchmarks for Senior UI Developers with 5-10 years of experience in Poland, particularly in remote roles for international companies, the estimated salary range is PLN 15,000 - PLN 25,000 gross per month. This range can vary based on specific experience, skill set, and the client's budget. Benefits:

• Professional Development: Access to Udemy courses of your choice for continuous learning and skill enhancement.

• Team Engagement: Regular team-buildings, events, marathons, and charity activities to foster camaraderie and a strong team spirit.

• Skill Enhancement: Workshops, trainings, and expert knowledge-sharing sessions to keep your technical skills sharp and encourage professional growth.

• Career Progression: A clear career path with defined opportunities for advancement within the organization.

• Work-Life Balance: Generous absence days to ensure a healthy work-life balance.

• Flexibility: Flexible working hours and a flexible work setup, allowing you to work from anywhere and organize your day according to your preferences.

Working Hours:

• The standard working hours are equivalent to a full-time position (approximately 40 hours per week). However, the role offers significant flexibility, allowing for remote work and the organization of your day according to your preferences.

📝 Enhancement Note: The salary estimate is based on research for senior-level software development roles in Poland, considering the remote nature for an international company. The benefits package is quite comprehensive, emphasizing continuous learning, work-life balance, and flexibility, which are attractive to experienced developers. The "work from anywhere" aspect is a significant perk, aligning with modern remote work trends.

🎯 Team & Company Context

🏢 Company Culture

Industry: Software Development & IT Consulting, with a focus on delivering innovative solutions for various sectors including Fintech, Healthcare, EdTech, Construction, and Hospitality. The client's product operates in the AI/Machine Learning space, focused on business decision-making and optimization.

Company Size: Intellectsoft is a mid-sized to large company, with a global presence and teams operating across North America, Latin America, and Europe. This size allows for both structured processes and a dynamic, innovative environment.

Founded: 2007, providing over 15 years of experience in delivering digital transformation and software solutions.

Team Structure:

• Cross-functional Product Teams: You will likely be part of a dedicated, cross-functional product team working on the AI-powered platform. This team will include engineers (frontend, backend), QA, DevOps, UX/UI designers, and Product Managers.

• Reporting Hierarchy: You will report to a Team Lead or Engineering Manager, with potential indirect reporting to a Product Owner for project-specific priorities.

• Collaboration Focus: The emphasis is on agile methodologies, with strong collaboration between development teams and business stakeholders to ensure the product meets market needs and client expectations.

Methodology:

• Agile Development: Expect to work within an Agile framework (Scrum or Kanban) for iterative development, continuous feedback, and rapid adaptation.

• Data-Driven Decision Making: The client's product itself is data-driven, implying that the development process also values data analysis for performance monitoring, user feedback interpretation, and strategic planning.

• Innovation & Scalability: The company culture supports delivering cutting-edge solutions and building scalable architectures, encouraging proactive problem-solving and forward-thinking development practices.

Company Website: www.intellectsoft.net

📝 Enhancement Note: The company's experience with diverse industries and its client roster (Jaguar Motors, Universal Pictures, Harley-Davidson) suggest a robust project management structure and a high standard for delivery. The specific client product's focus on AI and data analytics means the UI developer will be integral to making complex information accessible and actionable, requiring strong analytical and problem-solving skills in addition to UI expertise.

📈 Career & Growth Analysis

Operations Career Level: Senior UI Developer. This level implies significant autonomy, the ability to mentor junior developers, and a role in shaping technical direction for frontend development within the project. It signifies a transition from pure implementation to strategic contribution.

Reporting Structure: You will likely report to an Engineering Manager or a Lead Developer. There will be close collaboration with Product Managers, UX Designers, and Backend Engineers, forming a core product development unit.

Operations Impact: As a Senior UI Developer on an AI-powered platform, your impact will be direct and significant. You will be responsible for translating complex data insights and machine learning outputs into intuitive, user-friendly interfaces. This directly influences user adoption, client satisfaction, and the overall effectiveness of the AI solution in helping businesses make better decisions. Your work will be critical in making advanced technology accessible and actionable.

Growth Opportunities:

• Technical Specialization: Deepen expertise in React.js, explore advanced frontend architectures (like micro-frontends), or expand into areas like performance optimization and accessibility.

• Leadership Development: Transition into a Tech Lead role, guiding a team of developers, contributing to architectural decisions, and mentoring junior team members.

• Cross-functional Expertise: Gain exposure to AI/ML concepts, data visualization best practices, and product management, broadening your understanding of the entire product lifecycle.

• Client-Facing Roles: Develop skills in client communication and technical consultation, potentially moving into roles that involve direct client interaction or solution architecture.

📝 Enhancement Note: The "Senior" title indicates that candidates are expected to not only excel technically but also contribute to team leadership and process improvement. The growth opportunities are geared towards both deepening technical skills and moving into leadership or more strategic roles within product development, aligning with the company's focus on innovation and scalability.

🌐 Work Environment

Office Type: This position is fully remote, offering a "work from anywhere" setup. This indicates a distributed team environment where collaboration relies heavily on digital communication tools and asynchronous work practices.

Office Location(s): While the role is based in Poland, the "work from anywhere" flexibility means you are not tied to a specific physical office location within Poland or potentially even outside of it, depending on company policy for remote international employees.

Workspace Context:

• Digital Collaboration Hub: Expect a highly digital work environment utilizing tools like Slack, Microsoft Teams, Jira, Confluence, and video conferencing platforms for daily communication, project management, and knowledge sharing.

• Tools & Technology: Access to modern development tools and technologies, including robust IDEs, version control systems, CI/CD pipelines, and the specified frontend frameworks and libraries.

• Autonomous Work: The environment fosters autonomy, requiring self-discipline, proactive communication, and effective time management to collaborate successfully with a distributed team.

Work Schedule:

• Flexible hours are a key benefit, allowing you to structure your workday to suit your productivity peaks and personal commitments. While core hours for team synchronization might exist, the overall approach is designed for remote autonomy.

📝 Enhancement Note: The "work from anywhere" and "flexible hours" aspects are significant. This suggests a mature remote work culture that prioritizes results and autonomy over strict scheduling. Candidates should be comfortable with asynchronous communication and proactive in their engagement with the team.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A brief call with an HR representative or recruiter to assess basic qualifications, cultural fit, and alignment with the role's expectations.

• Technical Interview (Round 1): An in-depth interview with a Senior Developer or Engineering Manager focusing on your React.js expertise, core web technologies, state management, and problem-solving abilities. This may involve live coding exercises.

• Technical Interview (Round 2) / System Design: This stage often involves discussing your experience with front-end architecture, performance optimization, and potentially a system design exercise related to building scalable UI components or features for an AI platform.

• Portfolio Review & Discussion: A dedicated session where you present key projects from your portfolio, explaining your role, technical approach, challenges faced, and outcomes achieved. This is a critical part of assessing your experience and impact.

• Final Interview: A discussion with a hiring manager or senior leadership, focusing on career aspirations, cultural fit, and broader contributions you can make to the team and company.

Portfolio Review Tips:

• Curate Strategically: Select 2-3 of your most impactful projects that best showcase your React.js skills, front-end architecture experience, and ability to work on complex, data-driven applications.

• Quantify Your Impact: For each project, clearly articulate the business problem, your specific contributions, the technical challenges you overcame, and the measurable results (e.g., performance improvements, user engagement increases, efficiency gains).

• Showcase Code Quality: Be prepared to walk through code snippets that highlight your clean coding practices, modular design, and effective use of state management. If possible, include links to live demos or well-documented GitHub repositories.

• Focus on Architecture: For a senior role, emphasize your thought process behind architectural decisions, including how you addressed scalability, maintainability, and performance. Discuss your experience with micro-frontends if applicable.

• Tell a Story: Frame your project presentations as narratives, explaining the context, your journey through the problem, the solution you implemented, and the lessons learned.

Challenge Preparation:

• Frontend Challenges: Practice common coding challenges focused on data structures, algorithms, and JavaScript/React problem-solving. Be ready for live coding sessions.

• System Design Scenarios: Prepare for discussions on how to design scalable and performant front-end systems, considering factors like state management, API integrations, and rendering strategies for complex data.

• Behavioral Questions: Anticipate questions about teamwork, problem-solving, handling conflict, and your approach to learning new technologies. Use the STAR method (Situation, Task, Action, Result) to structure your answers.

📝 Enhancement Note: The interview process is structured to assess both technical proficiency and the ability to contribute strategically. The portfolio review is highlighted as a key component, emphasizing the need for candidates to demonstrate tangible results and a deep understanding of their work's impact. Preparing specific, quantifiable examples is crucial for this stage.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend Framework: React.js is the primary technology.

• State Management: Redux, Flux, or similar state management libraries.

• Build Tools: Webpack for bundling and build process management.

• Testing Frameworks: Enzyme for component testing; Cypress is a preferred skill for end-to-end testing.

• Version Control: Git is standard for source control.

Analytics & Reporting:

• Performance Monitoring: Tools for tracking application performance, load times, and user interactions (e.g., Lighthouse, browser developer tools, potentially integrated APM tools).

• Data Visualization Libraries: Experience with libraries like D3.js, Chart.js, or Recharts would be beneficial for displaying insights from the AI platform.

CRM & Automation:

• API Integration: Proficiency in integrating with RESTful APIs and potentially GraphQL.

• CMS: Strapi CMS is listed as a preferred skill, indicating potential use for content management within the application.

• Real-time Communication: Socket.io is a preferred skill, suggesting the need for real-time features within the UI.

📝 Enhancement Note: The technology stack is focused on modern frontend development. Proficiency in React.js and its ecosystem (Redux, Webpack, Enzyme) is non-negotiable. The preferred skills like TypeScript, micro-frontend architecture, Cypress, and specific integrations (Socket.io, Strapi) indicate the direction towards building robust, scalable, and feature-rich applications. Developers should be comfortable with these tools and frameworks.

👥 Team Culture & Values

Operations Values:

• Innovation & Excellence: A drive to deliver cutting-edge solutions and maintain high standards of quality in development and delivery.

• Collaboration & Teamwork: Emphasis on working together effectively across functions to achieve common goals, valuing open communication and mutual support.

• Continuous Learning: A commitment to ongoing professional development, skill enhancement, and staying abreast of technological advancements.

• Impact & Ownership: A focus on creating solutions that make a real difference for clients and taking ownership of one's work and its outcomes.

• Flexibility & Autonomy: Valuing individual autonomy, work-life balance, and the ability to work flexibly to maximize productivity and well-being.

Collaboration Style:

• Agile & Iterative: A collaborative approach centered around agile methodologies, involving regular stand-ups, sprint reviews, and retrospectives to foster continuous improvement and transparency.

• Cross-functional Synergy: Strong emphasis on seamless collaboration between frontend, backend, QA, UX, and product teams to ensure cohesive product development.

• Open Communication: An environment that encourages open dialogue, constructive feedback, and proactive problem-solving, facilitated by digital communication tools.

📝 Enhancement Note: The culture emphasizes a balance between high performance and employee well-being. The "work from anywhere" and flexible hours are strong indicators of a trust-based environment that values results. For a senior role, demonstrating an ability to mentor, provide constructive feedback, and contribute positively to team dynamics will be key.

⚡ Challenges & Growth Opportunities

Challenges:

• Complex Data Visualization: Translating intricate AI and machine learning outputs into intuitive and performant UI components can be a significant technical challenge.

• Scalability of Frontend Architecture: Ensuring the frontend architecture remains robust, maintainable, and performant as the AI platform evolves and handles larger datasets.

• Cross-functional Alignment: Effectively collaborating with diverse teams (backend, data science, product) to ensure seamless integration and a unified product vision.

• Keeping Pace with Technology: Continuously learning and adapting to the rapidly evolving landscape of frontend technologies and best practices.

Learning & Development Opportunities:

• Advanced React Ecosystem Training: Opportunities to deepen expertise in areas like React hooks, context API, performance optimization techniques, and potentially server-side rendering or static site generation with React.

• Exposure to AI/ML Concepts: Gaining a better understanding of the underlying AI and machine learning principles driving the client's product, enabling more effective UI design for data-driven insights.

• Architectural Design Workshops: Participating in or leading discussions on front-end architectural patterns, including micro-frontends and scalability strategies.

• Industry Conferences & Certifications: Support for attending relevant tech conferences or pursuing certifications that enhance frontend development skills.

📝 Enhancement Note: The challenges presented are typical for senior roles in innovative tech companies, especially those dealing with complex data and AI. The growth opportunities are well-aligned with these challenges, offering pathways to specialize, lead, and broaden one's technical and strategic skill set.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to optimize the performance of a React application. What was the issue, what steps did you take, and what was the outcome?" (Focus on metrics, tools used, and problem-solving approach).

• "How would you approach building a complex, real-time dashboard for visualizing large datasets generated by an AI model?" (Focus on architecture, state management, data fetching, and rendering strategies).

• "Discuss your experience with micro-frontend architecture. What are its benefits and drawbacks, and when would you recommend its use?" (Demonstrate understanding of modularity, scalability, and team coordination). Company & Culture Questions:

• "What interests you about working on an AI-powered platform, and how do you see UI development contributing to its success?" (Showcase understanding of the product's value proposition and your role's impact).

• "Given our flexible work environment, how do you ensure effective communication and collaboration with a distributed team?" (Highlight self-discipline, proactivity, and familiarity with remote collaboration tools).

• "How do you stay updated with the latest trends in frontend development, and how do you apply that knowledge to your work?" (Demonstrate a commitment to continuous learning and innovation). Portfolio Presentation Strategy:

• Structure your presentation: Start with an overview of the project, your role, and the core problem. Detail the technical challenges and your solutions, focusing on React.js implementation, performance optimizations, and any integration aspects. Conclude with the measurable impact and lessons learned.

• Highlight Key Technologies: Clearly articulate where and why you used specific technologies like Redux, Webpack, or any preferred skills you possess.

• Showcase Code Snippets: Be ready to share well-commented code examples that illustrate your coding style, architectural patterns, and problem-solving approach.

• Be ready for deep dives: Expect interviewers to ask detailed questions about your decisions, trade-offs, and alternative approaches you considered.

📝 Enhancement Note: Interview preparation should focus on articulating not just what you did, but why you did it, and the impact it had. For a senior role, demonstrating strategic thinking, problem-solving depth, and an understanding of the business context is as important as technical fluency.

📌 Application Steps

To apply for this operations position:

• Submit your application through the provided link on Workable.

• Tailor your Resume: Update your resume to highlight your 5+ years of experience in UI development, specifically with ReactJS. Emphasize achievements related to performance optimization, responsive design, and front-end architecture. Use keywords from the job description like "ReactJS," "JavaScript," "HTML," "CSS," "Redux," and "Webpack."

• Prepare Your Portfolio: Curate 2-3 strong projects that showcase your best React.js work. Ensure each project clearly outlines your role, the challenges, the solutions you implemented, and any quantifiable results. Be ready to present these projects confidently.

• Research Intellectsoft & Client Product: Familiarize yourself with Intellectsoft's services and client portfolio (www.intellectsoft.net). Understand the client's AI-powered platform and its value proposition in helping businesses make better decisions. This will help you tailor your answers during interviews.

• Practice Technical Questions: Review common React.js interview questions, data structures, algorithms, and front-end system design concepts. Practice live coding exercises if possible.

⚠️ 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.

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