Senior Frontend Engineer (Design Systems)

📍 Job Overview

Job Title: Senior Frontend Engineer (Design Systems)

Company: Fairmarkit

Location: Warsaw, Masovian Voivodeship, Poland

Job Type: Full-time

Category: Software Engineering / Frontend Development

Date Posted: May 27, 2026

Experience Level: 5-10 Years

Remote Status: On-site

🚀 Role Summary

• Design, develop, and evolve core platform features and reusable UI components with a strong emphasis on a design system approach.

• Collaborate closely with product managers, designers, and fellow engineers to deliver robust, maintainable, and scalable frontend solutions.

• Provide technical leadership in an agile environment, utilizing modern technologies and best practices to drive efficient software development.

• Focus on building critical platform functionalities like notification systems, chats, and admin panels that empower other engineering teams.

📝 Enhancement Note: The role is specifically for a Senior Frontend Engineer with a specialization in Design Systems, implying a need to create and maintain a consistent, scalable, and efficient UI architecture across Fairmarkit's platform. This requires not only strong coding skills but also a strategic understanding of component-based development and cross-team adoption.

📈 Primary Responsibilities

• Lead the design, development, and implementation of a comprehensive design system, ensuring consistency and reusability of UI components across all Fairmarkit applications.

• Build and maintain high-performance, accessible, and maintainable frontend features and core functionalities, including notification systems, chat interfaces, and internal/customer-facing admin panels.

• Collaborate with product, design, and engineering teams to translate complex requirements and vision into well-defined user stories and technical specifications.

• Write high-quality, well-documented, and testable code in Angular and TypeScript, adhering to modern engineering practices and performance optimization standards.

• Provide technical guidance and mentorship to other engineers, fostering a culture of code quality, best practices, and continuous improvement within the platform team.

• Actively participate in agile ceremonies, contributing to sprint planning, daily stand-ups, and retrospectives to ensure timely and quality delivery.

• Troubleshoot and resolve frontend issues, optimizing application performance and user experience.

• Contribute to defining and evolving the frontend architecture, ensuring scalability and maintainability of the platform.

📝 Enhancement Note: While the raw description focuses on building features, the "Design Systems" title and the mention of "core building blocks" and "reusable and high-performance components" strongly suggest a focus on creating a standardized UI library. This role isn't just about feature development but about establishing and governing the foundational UI elements that other teams will consume.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a Bachelor's or Master's degree in Computer Science, Engineering, or a related field, or equivalent practical experience, is typically expected for a Senior role.

Experience: 5+ years of professional frontend development experience, with a significant portion focused on building complex applications and reusable component libraries.

Required Skills:

• 5+ years of professional frontend development experience.

• Deep proficiency in TypeScript and a strong command of Angular (including concepts like DI, change detection, modules, standalone components, signals).

• Expertise in RxJS for reactive programming.

• Solid understanding and practical application of modern HTML5 and CSS3 (including SASS).

• Experience building and maintaining common UI components and design systems.

• Proven ability to optimize frontend performance and ensure high levels of accessibility (WCAG standards).

• Solid understanding of API services and core JavaScript/TypeScript concepts.

• Familiarity with modern engineering practices, including CI/CD, testing, and agile methodologies.

Preferred Skills:

• Experience working with Angular Material for UI component implementation.

• Experience with Nx and managing monorepo setups.

• Familiarity with other frontend frameworks or libraries.

• Understanding of DevOps culture and practices.

• Experience in B2B SaaS environments.

📝 Enhancement Note: The emphasis on "5+ years" and the requirement for deep Angular (DI, change detection, modules, standalone components, signals) and TypeScript expertise, along with RxJS, points to a senior-level individual contributor role. The "Nice to have" section explicitly mentions Angular Material and Nx/monorepos, which are highly relevant for design systems and large-scale frontend architectures.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase at least 2-3 significant frontend projects that demonstrate expertise in Angular and TypeScript.

• Highlight projects where you were instrumental in building or contributing to a design system or a comprehensive library of reusable UI components.

• Include examples of performance optimization efforts and accessibility implementations within your projects.

• Provide evidence of collaboration with designers and product managers, illustrating your ability to translate requirements into functional UIs.

Process Documentation:

• Be prepared to discuss your approach to component development, including design patterns, state management, and testing strategies.

• Articulate your process for ensuring accessibility compliance and performance optimization in frontend development.

• Describe your experience with agile development processes, including your role in sprint planning, code reviews, and retrospectives.

• Explain how you would contribute to or evolve a design system, including documentation, governance, and adoption strategies.

📝 Enhancement Note: For a Senior Frontend Engineer, especially one focused on Design Systems, a portfolio is crucial. It needs to demonstrate not just coding ability but also strategic thinking around component architecture, reusability, and cross-team impact. The emphasis on Angular, TypeScript, and specific concepts like standalone components and signals implies a need for practical, hands-on examples.

💵 Compensation & Benefits

Salary Range: For a Senior Frontend Engineer in Warsaw, Poland, with 5-10 years of experience, the estimated annual gross salary range is typically between PLN 160,000 - PLN 240,000 (approximately €36,000 - €54,000). This can vary based on specific skills, interview performance, and the company's compensation philosophy.

Benefits:

• Flexible working hours, allowing for better work-life balance and autonomy.

• High-level development environment and a strong DevOps culture with a top technology stack.

• Access to skilled and motivated teammates passionate about technology.

• Fast decision-making processes and effective inter-team interaction.

• Opportunities to improve development processes and contribute ideas, fostering knowledge sharing.

• Latest macOS work equipment (MacBook).

• 100% salary coverage for sick leaves.

• 20 days of paid vacation per year.

• Referral program rewarding successful hires.

• Professional training, courses, conferences, and meetups paid by Fairmarkit.

• A comfortable office environment with drinks and snacks.

Working Hours: The role is likely based on a standard 40-hour work week, with the benefit of flexible working hours allowing for some adjustment around core collaboration times.

📝 Enhancement Note: The provided benefits are quite comprehensive. For salary estimation in Warsaw, Poland, I've cross-referenced typical senior frontend engineer salaries in the region, considering the specific tech stack (Angular, TypeScript) and the "senior" designation. The exchange rate of approximately 4.4 PLN to 1 EUR was used for estimation.

🎯 Team & Company Context

🏢 Company Culture

Industry: Fairmarkit operates in the B2B SaaS industry, specifically revolutionizing procurement with an autonomous sourcing platform that leverages automation, AI, and GenAI. Their focus is on helping organizations buy and sell more competitively at scale, addressing tail spend and strategic sourcing needs.

Company Size: Fairmarkit is a growing company, evidenced by its Series C funding. While the exact current size isn't provided, Series C funding typically indicates a company that has moved beyond startup phase and is scaling significantly, likely employing several hundred individuals across various departments.

Founded: Fairmarkit was founded to address inefficiencies in procurement. Their journey from inception to Series C funding highlights a trajectory of innovation, market validation, and significant growth, suggesting a dynamic and forward-thinking environment.

Team Structure:

• The Platform team, which this role is part of, likely consists of engineers specializing in core infrastructure, shared services, and foundational components.

• The team structure emphasizes cross-functional collaboration, working closely with Product Management and Design to define and deliver features.

Methodology:

• Fairmarkit utilizes agile development methodologies, emphasizing iterative development, fast decision-making, and effective interaction between teams.

• The company promotes a "pure DevOps culture," suggesting a strong integration of development and operations, with a focus on automation, CI/CD, and continuous improvement.

• AI and GenAI are central to their product strategy, implying a data-driven approach and a continuous effort to leverage advanced technologies for product innovation.

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

📝 Enhancement Note: Fairmarkit's positioning as an "autonomous sourcing platform" using AI and GenAI indicates a company focused on cutting-edge technology and operational efficiency within the procurement space. The mention of Series C funding and backing by prominent investors suggests a financially stable and ambitious organization.

📈 Career & Growth Analysis

Operations Career Level: This role is classified as a Senior Frontend Engineer, indicating a mid-to-senior career stage. It requires a strong technical foundation, proven experience, and the ability to lead and mentor. The focus on Design Systems suggests a specialization within frontend development, offering a clear path for deepening expertise in UI architecture and component governance.

Reporting Structure: The Senior Frontend Engineer will likely report to an Engineering Manager or a Lead Frontend Engineer within the Platform team. They will collaborate extensively with Product Managers and Designers, and may mentor junior engineers.

Operations Impact: As a Senior Frontend Engineer focused on Design Systems, the impact is significant. By building robust, reusable, and consistent UI components, this role directly contributes to:

• Developer Velocity: Enabling other engineering teams to build features faster and more consistently.

• Product Quality & Consistency: Ensuring a cohesive and high-quality user experience across the entire Fairmarkit platform.

• Scalability: Providing a strong foundation for future platform growth and new feature development.

• Efficiency: Reducing redundant development efforts and design inconsistencies.

Growth Opportunities:

• Technical Specialization: Deepen expertise in Design Systems, UI architecture, and advanced Angular features.

• Leadership: Transition into a Tech Lead role, guiding a team and taking ownership of larger architectural initiatives.

• Mentorship: Guide and mentor junior engineers, developing leadership and coaching skills.

• Cross-Functional Exposure: Gain deeper understanding of product strategy, design principles, and AI/GenAI applications within procurement.

• Broader Impact: Potentially move into roles involving frontend architecture, engineering management, or even product management over time.

📝 Enhancement Note: The "Senior" title and the specific focus on "Design Systems" imply a role with significant technical ownership and influence. Growth opportunities would naturally extend into leadership, architectural design, and potentially team management, leveraging the foundational expertise gained in this role.

🌐 Work Environment

Office Type: Fairmarkit maintains a physical office in Warsaw, suggesting a preference for an on-site or hybrid work model, as indicated by the "On-site" remote status. The description mentions a "cute office with a cozy workplace, drinks and snacks," implying a comfortable and collaborative physical environment.

Office Location(s): The job is located in Warsaw, Masovian Voivodeship, Poland. Specific office address details are not provided but would typically be available upon inquiry or during the interview process.

Workspace Context:

• The on-site requirement suggests an environment conducive to in-person collaboration, team meetings, and spontaneous discussions, which can be highly beneficial for complex problem-solving and design system development.

• The "pure DevOps culture" and "top technology stack" imply access to modern development tools and infrastructure, facilitating efficient workflows.

• The presence of skilled and motivated teammates, along with opportunities for knowledge sharing, creates a stimulating and supportive work environment for continuous learning and professional development.

Work Schedule: Standard full-time employment with flexible working hours, allowing employees to manage their schedules while ensuring core collaboration times are met. This flexibility is beneficial for engineers balancing deep work on complex frontend tasks with team interactions.

📝 Enhancement Note: The "On-site" remote status is a key indicator. While flexible hours are offered, the expectation is that the engineer will be physically present in the Warsaw office, facilitating the team-based and collaborative nature often associated with design system development and agile processes.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A brief call with a recruiter to assess basic qualifications, cultural fit, and interest in the role and Fairmarkit.

• Technical Assessment (Online/Take-home): Candidates may be given a coding challenge or a take-home assignment focused on Angular, TypeScript, and potentially building a small component or addressing a design system-related problem.

• Technical Interview(s): In-depth interviews with engineering team members, focusing on technical skills, problem-solving abilities, experience with Angular, TypeScript, RxJS, performance, accessibility, and design systems. This stage will likely involve live coding or whiteboard exercises.

• System Design/Architecture Interview: A discussion focused on how you approach designing scalable, maintainable frontend systems, particularly in the context of a design system. Questions may explore architectural patterns, decision-making processes, and trade-offs.

• Hiring Manager/Team Lead Interview: A conversation to assess leadership potential, team collaboration skills, cultural fit, and alignment with Fairmarkit's values and mission.

• Final Round (Potentially with Senior Leadership): A final discussion to ensure overall alignment and suitability for the senior role.

Portfolio Review Tips:

• Curate Selectively: Choose 3-4 of your strongest projects that best showcase your Angular, TypeScript, and design system expertise.

• Highlight Design System Contributions: Clearly articulate your role in building, maintaining, or contributing to design systems or reusable component libraries. Explain the challenges and your solutions.

• Showcase Problem-Solving: For each project, describe the problem you solved, your approach, the technologies used, and the quantifiable results (e.g., improved performance metrics, increased development speed, enhanced consistency).

• Demonstrate Technical Depth: Be ready to discuss specific Angular concepts (DI, change detection, signals), RxJS patterns, performance optimization techniques, and accessibility best practices.

• Prepare for Live Walkthroughs: Be ready to walk through your code or a live demo of a project during the interview. Ensure your code is clean, well-documented, and organized.

Challenge Preparation:

• Angular Deep Dive: Revisit core Angular concepts, especially standalone components, signals, and dependency injection. Practice building complex components and managing state.

• TypeScript Mastery: Ensure you are comfortable with advanced TypeScript features, type inference, and generics.

• RxJS Proficiency: Understand common RxJS operators and how to chain them effectively for asynchronous operations and event handling.

• Design System Principles: Familiarize yourself with common design system frameworks, component libraries (like Angular Material), and best practices for documentation and governance.

• Performance & Accessibility: Brush up on techniques for frontend performance optimization (lazy loading, code splitting, efficient rendering) and accessibility standards (ARIA, semantic HTML).

• Agile & Collaboration: Be prepared to discuss your experience working in agile teams, handling code reviews, and collaborating with non-technical stakeholders.

📝 Enhancement Note: For a Senior role, especially one focused on Design Systems, interviews will heavily scrutinize not just coding skills but also architectural thinking, leadership potential, and the ability to influence and collaborate across teams. A strong portfolio demonstrating these aspects is paramount.

🛠 Tools & Technology Stack

Primary Tools:

• Angular: The primary framework for building frontend applications. Deep expertise in versions supporting standalone components and signals is expected.

• TypeScript: The primary language, ensuring type safety and code maintainability.

• RxJS: Essential for reactive programming, handling asynchronous operations and event streams within Angular applications.

• HTML5 & CSS3 (SASS): Core technologies for structuring and styling web interfaces.

Analytics & Reporting:

CRM & Automation:

Design System & Development Tools:

• Angular Material: Preferred for building UI components, suggesting a need for familiarity or experience with it.

• Nx (Nice to have): Experience with Nx for managing monorepos is a plus, indicating a potential for larger, more complex frontend codebases.

• Version Control: Git is standard.

• CI/CD Tools: Familiarity with CI/CD pipelines (e.g., Jenkins, GitLab CI, GitHub Actions) for automated testing and deployment.

• Testing Frameworks: Jasmine, Karma, Jest for unit and integration testing of Angular components.

📝 Enhancement Note: The emphasis on Angular, TypeScript, and RxJS is clear. The "Nice to have" mentions of Angular Material and Nx are significant indicators of the preferred technical environment and tooling for this design system-focused role.

👥 Team Culture & Values

Operations Values:

• Innovation: A drive to leverage AI, GenAI, and cutting-edge technologies to revolutionize procurement.

• Efficiency: A strong focus on automation, process optimization, and driving out costs, reflected in their product and DevOps culture.

• Collaboration: Emphasis on effective interaction between teams and departments, fostering a unified approach to delivering value.

• Quality & Excellence: A commitment to high standards in technology, product development, and customer experience, evidenced by awards from Gartner and IDC.

• Growth Mindset: Encouraging continuous learning, knowledge sharing, and the pursuit of professional development.

Collaboration Style:

• Cross-functional Integration: Engineers work closely with Product Managers and Designers, implying a collaborative process from ideation to implementation.

• Agile & Iterative: The team likely embraces agile methodologies, encouraging frequent feedback loops and iterative improvements.

• Knowledge Sharing: Opportunities for knowledge sharing between colleagues and teams are explicitly mentioned, suggesting an open and supportive environment for learning.

• DevOps Partnership: A strong integration between development and operations ensures smooth deployment and continuous improvement cycles.

📝 Enhancement Note: The company culture appears to be a blend of ambitious technological innovation (AI/GenAI) and disciplined execution (DevOps, agile, efficiency). This suggests a dynamic environment where engineers are expected to be both creative and results-oriented, with a strong emphasis on teamwork.

⚡ Challenges & Growth Opportunities

Challenges:

• Scaling a Design System: Establishing and evolving a design system for a growing B2B SaaS platform requires continuous effort, stakeholder buy-in, and robust governance to ensure adoption and maintainability.

• Integrating AI/GenAI into Frontend: Translating complex AI/GenAI capabilities into intuitive and user-friendly frontend experiences presents a unique technical challenge.

• Maintaining High Performance and Accessibility: Balancing feature development with the ongoing need for optimal performance and comprehensive accessibility across a large application.

• Navigating a Fast-Paced Environment: Adapting to rapid product development cycles and evolving business needs inherent in a growing tech company.

Learning & Development Opportunities:

• Advanced Angular & Frontend Architecture: Deepen expertise in modern Angular features, state management, and best practices for building scalable frontend architectures.

• Design System Expertise: Become a subject matter expert in design systems, component libraries, and UI governance.

• AI/GenAI Integration: Gain exposure to how AI/GenAI technologies are integrated into frontend applications, offering a unique skill set.

• Mentorship & Leadership: Develop leadership skills through mentoring junior engineers and potentially leading technical initiatives.

• Industry Conferences & Training: Fairmarkit supports attendance at professional trainings, courses, conferences, and meetups, providing ample opportunities for skill enhancement and networking.

📝 Enhancement Note: The challenges are typical for a senior role in a growing tech company focused on complex products. The growth opportunities are strongly tied to specialization in design systems and exposure to cutting-edge AI technologies, alongside leadership development.

💡 Interview Preparation

Strategy Questions:

• Design System Philosophy: "Describe your approach to building and maintaining a design system. What are the key principles, and how do you ensure adoption across multiple teams?" (Prepare to discuss component lifecycle, documentation, governance, and versioning.)

• Angular Architecture: "How would you design a notification system in Angular to be scalable, performant, and easily integrated by other teams? Discuss your choice of state management, data fetching, and component structure." (Focus on modularity, separation of concerns, and efficient data handling.)

• Problem-Solving & Collaboration: "Imagine a scenario where a product team needs a new complex UI component that doesn't fit neatly into the existing design system. How would you handle this? What steps would you take to balance their needs with design system integrity?" (Highlight communication, negotiation, and iterative refinement.)

Company & Culture Questions:

• "What interests you about Fairmarkit's mission and its use of AI/GenAI in procurement?" (Research Fairmarkit's product and market position.)

• "How do you see your role contributing to Fairmarkit's 'pure DevOps culture' and agile development practices?" (Connect your experience with their stated values.)

Portfolio Presentation Strategy:

• Structure Your Narrative: For each project, clearly present the problem, your solution (focusing on design system aspects), the technologies used, and the impact/results.

• Quantify Your Achievements: Use metrics whenever possible (e.g., "Reduced component development time by X%", "Improved accessibility score from Y to Z", "Increased UI consistency across N applications").

• Showcase Code Quality: Be prepared to discuss your code structure, testing strategies, and why you made specific technical decisions.

• Highlight Collaboration: Emphasize how you worked with designers, product managers, and other engineers.

• Focus on Design System Value: Clearly articulate the business value and technical benefits your design system contributions provided.

📝 Enhancement Note: Preparing for this role involves not just technical coding skills but also demonstrating strategic thinking around UI architecture, collaboration, and the ability to lead and mentor. The interview process will likely probe these areas deeply.

📌 Application Steps

To apply for this Senior Frontend Engineer position:

• Submit your application through the provided Greenhouse link.

• Curate and refine your resume: Ensure it prominently features your 5+ years of frontend development experience, with specific bullet points detailing your expertise in Angular, TypeScript, RxJS, and any contributions to design systems or reusable component libraries. Quantify achievements where possible.

• Prepare your portfolio: Select 2-3 of your strongest projects that showcase your skills in Angular, TypeScript, performance optimization, and accessibility. Be ready to articulate your contributions to design systems or component-based development.

• Research Fairmarkit: Understand their product, mission, and the B2B SaaS procurement space. Prepare to discuss why you are interested in their technology and company culture.

• Practice technical and behavioral questions: Anticipate questions about Angular, TypeScript, RxJS, design systems, agile methodologies, and your approach to problem-solving and collaboration.

⚠️ 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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