Senior UI Developer (Blazor, .NET) (She/He/They)

📍 Job Overview

Job Title: Senior UI Developer (Blazor, .NET)
Company: Capco
Location: Warsaw, Poland
Job Type: Contract (B2B)
Category: Software Development / UI Engineering
Date Posted: 2026-01-23
Experience Level: Mid-Level to Senior (2-5 years)
Remote Status: Hybrid (Remote OK, but based in Warsaw)

🚀 Role Summary

• Implement and enhance the user interface layer for complex financial technology applications.
• Develop robust, testable code with a strong emphasis on high test coverage and quality assurance.
• Collaborate closely with cross-functional teams, including Business Analysts and fellow Developers, to ensure seamless integration and optimal user experience.
• Contribute to code reviews, upholding high standards of code quality, consistency, and maintainability.
• Participate actively in testing and debugging to deliver a polished and high-quality end-user product.

📝 Enhancement Note: While the title is "Senior UI Developer," the AI-derived experience level of "2-5 years" suggests this role might be more accurately positioned as a mid-to-senior level. The focus on implementing new requirements and ensuring test coverage indicates a hands-on development role rather than a purely architectural one. The "Remote OK" status with a specific office location (Warsaw) implies a hybrid model where occasional on-site presence may be expected or preferred.

📈 Primary Responsibilities

• Translate new business requirements into functional and visually appealing UI components within the Blazor/.NET application framework.
• Write clean, efficient, and well-documented C# code for the UI layer, adhering to established coding standards and best practices.
• Design and implement comprehensive unit and integration tests to ensure the reliability and stability of UI features.
• Actively participate in Agile ceremonies, providing technical input on UI development tasks and estimations.
• Work closely with UI/UX designers to ensure accurate implementation of user interfaces and intuitive user flows.
• Integrate UI components with backend services and APIs, ensuring smooth data flow and functionality.
• Troubleshoot and resolve UI-related bugs and performance issues identified during development or testing phases.
• Contribute to the continuous improvement of development processes, tools, and methodologies within the UI engineering team.
• Engage in peer code reviews, offering constructive feedback to improve code quality and knowledge sharing.

📝 Enhancement Note: The core responsibilities are geared towards hands-on development and ensuring the quality of the UI implementation. The emphasis on "seamless integration" and "collaboration" suggests a need for strong communication and teamwork skills beyond just coding. The mention of "Behavior Driven Development" points to a structured approach to requirements and testing.

🎓 Skills & Qualifications

Education: Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
Experience: 2-5 years of professional experience in front-end development, with a significant focus on Blazor and the .NET ecosystem.

Required Skills:

• Blazor Development: In-depth knowledge and practical experience building web applications with Blazor (Server or WebAssembly).
• C# & .NET Proficiency: Strong command of C# programming language and the .NET framework (including .NET Core/.NET 5+).
• Front-End Fundamentals: Solid understanding of HTML5, CSS3, and JavaScript for front-end development.
• UI Test Automation: Experience with UI automation testing frameworks such as Selenium, Playwright, or similar tools.
• Behavior Driven Development (BDD): Familiarity with BDD principles and experience writing specifications using Gherkin syntax.
• Version Control: Proficient in using Git or other distributed version control systems for code management.
• Analytical Skills: Strong problem-solving and analytical capabilities to diagnose and resolve complex technical issues.
• Team Collaboration: Proven ability to work effectively within a team environment, contributing to shared goals.
• English Fluency: Fluent spoken and written English communication skills are essential for international project collaboration.
• Proactive Work Ethic: Demonstrated ability to work independently, take initiative, and manage workload effectively.

Preferred Skills:

• Experience with UI/UX design principles and best practices.
• Familiarity with modern JavaScript frameworks (e.g., React, Angular, Vue.js) for broader context.
• Knowledge of RESTful API design and integration.
• Experience with CI/CD pipelines and tools.
• Understanding of cloud platforms (e.g., Azure, AWS) and their services.

📝 Enhancement Note: The required skills align directly with the job title and technical stack mentioned. The BDD and UI test automation requirements indicate a mature development process focused on quality and maintainability. The "2-5 years" experience level, combined with "Senior" in the title, suggests they are looking for someone who can hit the ground running with minimal supervision but may not yet be leading architectural decisions.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Blazor Project Examples: Showcase at least one significant Blazor project demonstrating UI implementation, component architecture, and integration capabilities.
• Code Quality Demonstration: Provide examples of well-structured, maintainable code, ideally with links to public repositories (e.g., GitHub) or code samples highlighting best practices.
• Test Automation Implementation: Include evidence of UI test automation setup and execution within projects, demonstrating how you ensure application quality.
• BDD Scenario Examples: If possible, include examples of Gherkin feature files and how they were translated into automated tests.

Process Documentation:

• Workflow Design: Be prepared to discuss how you approach translating requirements into technical UI specifications and development workflows.
• Testing Strategy: Articulate your approach to UI testing, including unit, integration, and end-to-end testing strategies.
• Collaboration & Integration: Describe how you integrate UI development into broader application development lifecycles and collaborate with backend teams.

📝 Enhancement Note: For a UI Developer role, a portfolio is crucial. The emphasis here is on demonstrating practical application of Blazor, C#, and .NET, along with a clear understanding of testing methodologies like BDD and automation. Candidates should focus on showcasing projects that highlight their ability to build robust, user-friendly interfaces and their commitment to code quality and testing.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Senior UI Developers with Blazor/.NET expertise in Poland, a B2B contract rate could range from 80-120 PLN per hour, or approximately 13,000 - 20,000 PLN gross per month, depending on experience, specific skill set, and negotiation.

Benefits:

• Flexible Collaboration Model: Primarily a B2B contract, offering flexibility in how you structure your business.
• Diverse Project Opportunities: Chance to work on a variety of projects within the financial services sector, providing exposure to different challenges and technologies.
• Global Consulting Firm Exposure: Opportunity to work with a leading global technology and management consulting firm, gaining experience with major financial institutions.
• Professional Development: Access to a dynamic work environment that fosters growth and learning, potentially including training and development opportunities.
• Remote Work Flexibility: The ability to work remotely (though based in Warsaw) offers a good work-life balance.

Working Hours: Standard full-time working hours are expected, likely around 40 hours per week, with flexibility offered through the remote work option.

📝 Enhancement Note: As this is a B2B contract role, the compensation is likely to be presented as an hourly or monthly rate, rather than a fixed salary with traditional employee benefits. The range provided is an estimate based on typical market rates for similar roles in Poland. The benefits listed are derived from the company's description and the contract nature of the role.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology and Management Consulting, with a strong focus on Financial Services (Banking, Payments, Capital Markets, Wealth, and Asset Management).
Company Size: Capco is a global firm, but the Poland office likely represents a significant and growing hub. The global company size is substantial (thousands of employees), offering stability and resources.
Founded: Capco was founded in 1998, giving it a long history and established presence in the consulting space.

Team Structure:

• The role is within the Capco Poland technology division, specifically focusing on UI development.
• You'll likely be part of a project team, working closely with other developers (backend, full-stack), Business Analysts, Project Managers, and potentially UI/UX designers.
• Reporting is expected to be to a Development Lead or Project Manager within the Capco structure.

Methodology:

• Capco emphasizes an agile, nimble, and innovative work environment, suggesting that development processes will likely follow Agile methodologies (Scrum, Kanban).
• A strong focus on digital transformation means teams are often working with cutting-edge technologies and client-facing solutions.
• Data-driven decision-making is implied, though more critical for analytics roles, it underpins the need for robust development and testing.

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

📝 Enhancement Note: Capco's reputation as a global leader in financial services consulting implies a professional, client-focused, and results-oriented culture. The emphasis on "spark behind digital transformation" suggests an environment that values innovation and problem-solving. The "fast, flexible, and fiercely entrepreneurial" culture points towards a dynamic workplace that encourages initiative.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Senior UI Developer. It implies a level of technical expertise and autonomy, where the individual is expected to contribute significantly to project delivery, mentor junior developers, and potentially influence technical decisions within their domain.

Reporting Structure: The Senior UI Developer will report to a Project Manager or a Development Lead within the Capco Poland organization. Collaboration will be extensive with peers in development, business analysis, and design.

Operations Impact: As a UI Developer, the impact is directly on the client's user experience and the successful implementation of digital solutions. High-quality UI development directly influences user adoption, client satisfaction, and the overall success of digital transformation projects within financial institutions.

Growth Opportunities:

• Technical Specialization: Deepen expertise in Blazor, .NET, and UI technologies, potentially becoming a subject matter expert.
• Cross-Functional Experience: Gain exposure to different areas of financial services through project work.
• Mentorship: Opportunity to mentor junior developers, honing leadership and communication skills.
• Project Leadership: Potential progression to a Technical Lead or Architect role on future projects.
• Consulting Skills: Develop client-facing and consulting skills through engagement on diverse client projects.

📝 Enhancement Note: The growth path for a Senior UI Developer at a consulting firm like Capco often involves not just technical advancement but also developing consulting acumen. The ability to translate technical solutions into business value and communicate effectively with clients will be key to career progression.

🌐 Work Environment

Office Type: Capco operates as a consulting firm, which typically means client-site work is common. However, with a "Remote OK" status and a specific office in Warsaw, it suggests a hybrid model where Capco offices serve as hubs for collaboration, training, and potentially client meetings, while remote work is supported for day-to-day development.

Office Location(s): Warsaw, Poland. This implies a vibrant business environment with access to talent and resources.

Workspace Context:

• Collaborative Spaces: Capco offices are likely designed with collaboration in mind, featuring meeting rooms and open spaces for team discussions.
• Technology Access: Developers will have access to modern development tools and potentially company-provided hardware.
• Team Interaction: Opportunities for in-person interaction with colleagues and clients in Warsaw, fostering team cohesion and knowledge sharing.

Work Schedule: A standard 40-hour work week is typical, with flexibility afforded by the remote work option. This allows for effective management of development tasks and personal commitments, crucial for maintaining productivity in a demanding consulting environment.

📝 Enhancement Note: The "Remote OK" status in Warsaw suggests a modern approach to work, balancing the need for collaboration and client presence with the benefits of remote work. The specific office location in Warsaw is a key detail for candidates who prefer a hybrid setup.

📄 Application & Portfolio Review Process

Interview Process:

• Recruiter Screening Call: Initial conversation to assess basic qualifications, motivation, and cultural fit. Be prepared to discuss your experience with Blazor, .NET, and your career aspirations.
• Hiring Manager Technical Interview: In-depth technical discussion focusing on your Blazor and C#/.NET skills, problem-solving abilities, and experience with UI development best practices. Expect to walk through your portfolio and discuss specific projects.
• Feedback: A period for the hiring team to discuss your candidacy internally.
• Offer: If successful, a formal offer will be extended.

Portfolio Review Tips:

• Curate Selectively: Focus on 2-3 of your strongest Blazor/.NET projects that best demonstrate the required skills.
• Highlight Impact: For each project, clearly articulate the problem you solved, your role, the technologies used, and the outcomes achieved (e.g., improved performance, enhanced user experience, successful feature delivery).
• Showcase Code Quality: Be ready to share code snippets or a link to a repository that exemplifies clean, well-structured, and documented code.
• Demonstrate Testing: Clearly explain your approach to testing within the project, detailing any UI automation or BDD implementation.
• Prepare for Technical Deep Dives: Be ready to discuss architectural decisions, challenges faced, and how you navigated them.

Challenge Preparation:

• Coding Exercises: You might be asked to solve a small coding problem related to Blazor or C#. Practice common algorithms and data structures.
• System Design Discussion: Be prepared to discuss how you would approach building a specific UI feature or component, considering scalability, performance, and maintainability.
• Behavioral Questions: Prepare examples for questions about teamwork, problem-solving, handling challenges, and your motivation for joining Capco.

📝 Enhancement Note: The interview process is standard for a technical role. The emphasis on a portfolio review and technical interview means candidates should thoroughly prepare their project examples and be ready for detailed technical questioning on Blazor, .NET, and UI development principles.

🛠 Tools & Technology Stack

Primary Tools:

• Blazor: The core framework for UI development.
• C# / .NET: The primary programming language and framework.
• HTML5 / CSS3 / JavaScript: Essential for front-end web development.
• Visual Studio / VS Code: Common IDEs for .NET development.
• Git: For version control and collaborative development.

Analytics & Reporting:

• While not a primary focus for this role, understanding how UI performance is tracked (e.g., browser developer tools, application performance monitoring tools) is beneficial.

CRM & Automation:

• Not directly applicable to this UI Development role, but awareness of how UI integrates with backend systems that might use CRMs or automation platforms is helpful.

📝 Enhancement Note: The technology stack is clearly defined: Blazor, .NET, C#, and standard web front-end technologies. Proficiency in these is paramount. Experience with Git is also a non-negotiable requirement.

👥 Team Culture & Values

Operations Values:

• Agile & Nimble: Embrace rapid iteration, flexibility, and quick adaptation to changing project needs.
• Entrepreneurial Spirit: Take initiative, be proactive, and contribute innovative ideas to drive digital transformation.
• People First: Value collaboration, mutual respect, and a supportive team environment.
• Client Focus: Deliver high-quality solutions that meet client needs and drive business value.
• Excellence & Quality: Strive for high standards in code, testing, and overall delivery.

Collaboration Style:

• Cross-functional Integration: Work seamlessly with Business Analysts, Backend Developers, and UI/UX Designers to achieve project goals.
• Open Communication: Foster an environment of transparency and open dialogue, especially during code reviews and team meetings.
• Knowledge Sharing: Actively participate in sharing best practices, insights, and solutions with team members.

📝 Enhancement Note: Capco's stated culture emphasizes dynamism and client delivery. For a Senior UI Developer, this translates to being a proactive, collaborative team player who can contribute to fast-paced projects while maintaining a high standard of technical execution.

⚡ Challenges & Growth Opportunities

Challenges:

• Rapidly Evolving Technologies: Staying current with the latest advancements in Blazor, .NET, and front-end development trends.
• Complex Financial Systems: Adapting to the intricate requirements and regulatory landscape of the financial services industry.
• Client-Specific Environments: Navigating diverse client technology stacks and integration challenges.
• Balancing Speed and Quality: Delivering features quickly while maintaining high code quality and robust testing.

Learning & Development Opportunities:

• Advanced Blazor/ .NET Training: Opportunities to deepen expertise through specialized training programs.
• Industry Certifications: Potential to pursue certifications relevant to .NET development or cloud technologies.
• Exposure to Diverse Financial Domains: Gaining broad knowledge across banking, capital markets, and wealth management.
• Mentorship Programs: Formal or informal mentorship opportunities to guide career growth.

📝 Enhancement Note: The challenges are typical for a consulting role focused on technology. The growth opportunities are significant, especially within a global firm like Capco, offering exposure to various projects and career paths.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex UI component you built in Blazor. What were the challenges, and how did you overcome them?" (Preparation: Select a challenging project, detail your technical decisions, and highlight problem-solving skills.)
• "How do you ensure high test coverage for your UI code? Can you give an example of your experience with UI test automation or BDD?" (Preparation: Prepare specific examples of your testing strategies and tools used.)
• "How do you collaborate with backend developers and Business Analysts to ensure seamless integration of UI features?" (Preparation: Discuss your communication strategies and experience with API integrations and requirement clarification.)

Company & Culture Questions:

• "Why are you interested in Capco and this specific role?" (Preparation: Research Capco's work in financial services and digital transformation; align your skills and career goals.)
• "How do you embody Capco's values of being agile, entrepreneurial, and people-focused?" (Preparation: Think of specific examples from your past experience that demonstrate these traits.)
• "How do you stay up-to-date with new technologies in the Blazor and .NET ecosystem?" (Preparation: Mention blogs, conferences, online courses, personal projects.)

Portfolio Presentation Strategy:

• Start with the "Why": For each project, explain the business problem and the user need.
• Focus on Your Role: Clearly delineate your contributions, especially if it was a team project.
• Showcase Technical Depth: Be ready to explain architectural choices, design patterns used, and specific Blazor/C#/.NET implementations.
• Quantify Impact: If possible, use metrics to demonstrate the success of your work (e.g., performance improvements, user engagement metrics).
• Be Concise and Engaging: Practice your presentation to be clear, efficient, and interesting.

📝 Enhancement Note: Interview preparation should focus on demonstrating not only technical proficiency in Blazor/.NET but also strong communication, problem-solving, and alignment with Capco's consulting culture. The portfolio is a critical component.

📌 Application Steps

To apply for this Senior UI Developer position:

• Submit your application through the provided link on Capco's careers page.
• Customize Your Resume: Highlight your experience with Blazor, C#, .NET, UI test automation, and BDD. Use keywords from the job description. Quantify achievements where possible.
• Prepare Your Portfolio: Select your strongest Blazor/.NET projects. Ensure you can clearly articulate your role, the technical challenges, your solutions, and the impact. Have code samples or repository links ready.
• Practice Interview Questions: Rehearse answers to common technical and behavioral questions, focusing on demonstrating your skills and cultural fit with Capco's dynamic environment.
• Research Capco: Understand Capco's work in the financial services sector and its approach to digital transformation to tailor your responses and show 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.