Senior Software Engineer, UI (RFQ)

📍 Job Overview

Job Title: Senior Software Engineer, UI (RFQ)

Company: MarketAxess

Location: New York, New York, United States

Job Type: Full-Time

Category: Software Engineering (Front-End/UI)

Date Posted: August 01, 2025

Experience Level: Senior (7+ years enterprise, 4+ years ReactJS)

Remote Status: Hybrid

🚀 Role Summary

• Spearhead the development and enhancement of MarketAxess's next-generation fixed-income e-trading platform, with a strong emphasis on User Interface (UI) and User Experience (UX).

• Contribute to a high-performance, scalable, and fault-tolerant trading system, leveraging modern front-end technologies within the React ecosystem.

• Actively participate in the entire software development lifecycle, from analysis and design to implementation, testing, and documentation, adhering to exceptional software engineering practices.

• Drive agile and development practices within a collaborative team environment, focusing on continuous improvement, learning, and innovation in a cloud-native (Kubernetes) setting.

📝 Enhancement Note: While the role is for a Senior Software Engineer, the emphasis on UI/UX and the React ecosystem, coupled with the company's digital transformation journey in financial markets, suggests a focus on building intuitive and efficient interfaces for institutional credit product trading. This role is critical for improving accessibility, transparency, and competition within the fixed-income market.

📈 Primary Responsibilities

• Engage in hands-on development of new features and maintenance of the company's fixed-income e-trading platform, with a primary focus on enhancing UX/UI and the overall customer experience for institutional credit product trading.

• Participate actively in analyzing requirements, designing robust software solutions, writing clean and efficient code, and implementing comprehensive unit and integration tests.

• Collaborate with cross-functional teams to ensure functionally appropriate, technically sound, and well-integrated application systems that meet business needs.

• Serve as a core member of an agile development team, contributing to the refinement and execution of agile methodologies and development practices.

• Actively engage in code reviews, pair programming, and knowledge sharing to mentor and upskill other team members, fostering a culture of continuous learning and collaboration.

• Contribute to the architectural discussions and decision-making processes for the front-end components of the trading platform, ensuring scalability and maintainability.

• Work with API specifications and drive automation efforts to improve development efficiency and software quality.

📝 Enhancement Note: The responsibilities highlight a hands-on development role with significant ownership over the UI/UX aspects of a critical financial trading platform. The emphasis on agile practices, collaboration, and continuous improvement points to a team that values innovation and high-quality output, common in modern FinTech environments.

🎓 Skills & Qualifications

Education:

Experience:

• Minimum of 7+ years of enterprise software development experience, with a strong focus on the JavaScript/TypeScript development stack.

Required Skills:

• Proficiency in modern JavaScript (ES6+) and TypeScript for building scalable and maintainable front-end applications.

• Extensive experience with ReactJS, including component-based architecture, state management, and performance optimization.

• Demonstrated experience working with AG-Grid for high-performance data grids, essential for financial trading interfaces.

• Strong expertise in state management solutions like Redux.

• Proficiency in version control systems, specifically Git and familiarity with Git Flow branching strategies.

• Knowledge of CSS preprocessors (e.g., SASS/LESS) or modern CSS-in-JS solutions (e.g., Styled Components, Tailwind CSS) for efficient and maintainable styling.

• Experience with front-end testing frameworks such as Jest, React Testing Library, Cypress, or Playwright to ensure code quality and application reliability.

Preferred Skills:

• Desirable experience with DevOps tools and practices for continuous integration and continuous deployment (CI/CD).

• Experience with real-time data handling using WebSockets.

• Familiarity with Material UI for component design and consistency.

• Experience with OpenFin for building financial desktop applications.

• Understanding of Java development for potential integration with back-end services.

📝 Enhancement Note: The extensive list of required and preferred technical skills, particularly those related to data visualization (AG-Grid), state management (Redux), and testing frameworks, indicates a need for a highly skilled front-end engineer capable of handling complex financial data and building robust, real-time applications. The preference for DevOps and WebSockets suggests a forward-looking technology stack.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrate proficiency in building complex, data-intensive user interfaces, showcasing experience with financial data visualization and real-time updates.

• Provide examples of projects where you have designed and implemented scalable and performant React applications, highlighting architectural decisions and trade-offs.

• Showcase experience with state management solutions (e.g., Redux) and data grid components (e.g., AG-Grid) in practical application.

Process Documentation:

• Present case studies that detail your involvement in the design and implementation of front-end workflows, emphasizing process optimization and user-centric design principles.

• Document your approach to unit, integration, and end-to-end testing, illustrating how you ensure application stability and reliability.

• Provide evidence of your ability to collaborate effectively within an agile development process, including contributions to sprint planning, retrospectives, and code reviews.

📝 Enhancement Note: For a Senior UI Engineer role, a portfolio is crucial to showcase practical application of skills. The emphasis should be on the complexity of the data handled, the real-time nature of the application, and the engineer's ability to optimize performance and user experience within a structured development process. Demonstrating a solid understanding of testing and agile workflows is also key.

💵 Compensation & Benefits

Salary Range:

Benefits:

• Hybrid Work Environment: Offers a balance of in-office and remote work flexibility.

• On-site Amenities: Includes complimentary lunch provided on office days and stocked snack areas.

• Generous Paid Time Off: A competitive package comprising vacation, personal days, sick leave, and charity days.

• Parental Leave: Up to 20 weeks of fully paid parental leave.

• Retirement Savings: 401(k) plan with a dollar-for-dollar employer match up to $17,500.

• Employee Stock Purchase Plan: Opportunity to purchase company stock at a discount.

• Wellness Stipend: An annual allowance of up to $1,000 for gym memberships, home office equipment, and other wellness-related expenses.

• Onsite Healthcare: Access to world-class medical care through Mount Sinai at the Hudson Yards location.

• Professional Development: Support for learning through live and on-demand training, role-specific programs, employee-led sessions, and guest speakers.

• Comprehensive Core Benefits: Highly competitive medical, dental, and vision insurance programs.

Working Hours:

• The role is expected to involve approximately 40 hours per week, with the flexibility offered by the hybrid work arrangement.

📝 Enhancement Note: The salary range provided is competitive for a Senior Software Engineer in New York City. The benefits package is robust, offering significant perks related to work-life balance, financial well-being, health, and professional growth, aligning with industry standards for senior technical roles in major financial hubs.

🎯 Team & Company Context

🏢 Company Culture

Industry: Financial Technology (FinTech) – specifically focused on electronic trading platforms for fixed-income securities. MarketAxess is a leader in transforming analog trading processes in one of the world's largest financial markets.

Company Size: MarketAxess falls into the category of a large enterprise, indicated by its significant client base and global operations. This size suggests established processes but also opportunities for impact within a well-resourced organization.

Founded: MarketAxess was founded in 1997, indicating a company with a substantial history and proven track record in the financial markets, now actively undergoing digital transformation.

Team Structure:

• The UI engineering team is likely part of a larger engineering organization focused on developing and maintaining the core trading platform. Team members may specialize in different areas of the front-end stack or specific platform modules.

• Reporting structures would typically involve a Team Lead or Engineering Manager overseeing a group of engineers, with potential for leads within specific feature areas.

Methodology:

• The company emphasizes data-driven decision-making and is committed to digital transformation, suggesting a focus on leveraging data analytics to understand user behavior, market trends, and platform performance.

• Agile and iterative development methodologies are explicitly mentioned, indicating a preference for rapid prototyping, continuous feedback, and adaptive planning.

• The push towards modernization to the public cloud and Kubernetes implies an adoption of modern DevOps practices, automation, and containerization for efficient deployment and scaling.

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

📝 Enhancement Note: MarketAxess operates in a highly regulated and critical sector (FinTech). The company's culture appears to embrace innovation and digital transformation, aiming to modernize established financial markets. The emphasis on diverse perspectives and challenging assumptions is a positive sign for a collaborative and forward-thinking engineering environment.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned at a "Senior" level, signifying a need for seasoned engineers who can operate with a high degree of autonomy, mentor junior colleagues, and contribute to architectural decisions. Senior engineers are expected to drive technical initiatives and influence best practices.

Reporting Structure: A Senior Software Engineer typically reports to an Engineering Manager or a Lead Engineer. They may also work closely with Product Managers and Architects. Within the team, they are expected to guide and mentor more junior developers, acting as a technical resource.

Operations Impact: The UI engineering team directly impacts the user experience of MarketAxess's clients, who are institutional traders. Enhancing the platform's usability, speed, and reliability through effective UI development directly contributes to the company's mission of increasing transparency, efficiency, and competition in fixed-income markets. This role is pivotal in driving the adoption and success of the next-gen trading platform.

Growth Opportunities:

• Technical Specialization: Opportunities to deepen expertise in React, state management, UI performance optimization, and potentially explore adjacent areas like front-end architecture or specialized financial trading technologies.

• Leadership Development: Potential progression into a Tech Lead role, where one guides a specific feature team or component, or into an Architect role focusing on the broader platform's technical vision.

• Cross-Functional Exposure: Opportunities to collaborate with various departments, including product, design, and back-end engineering, providing a holistic understanding of the business and product development lifecycle.

• Industry Expertise: Gaining deep knowledge in the complex and evolving world of fixed-income trading and FinTech.

📝 Enhancement Note: The Senior title implies significant responsibility and opportunity for leadership and technical mentorship. The company's digital transformation focus suggests that engineers contributing to this initiative will have ample opportunities for skill development and career advancement within both technical and potential leadership tracks.

🌐 Work Environment

Office Type: The company offers a Hybrid Environment, meaning employees will split their time between working in the office and working remotely. This setup aims to balance the benefits of in-person collaboration with the flexibility of remote work.

Office Location(s): The primary location mentioned is New York, New York. The mention of "Hudson Yards location" in the benefits section for onsite healthcare provides a specific geographical context within New York City.

Workspace Context:

• The hybrid model fosters a collaborative workspace that encourages team interaction, brainstorming sessions, and knowledge sharing during in-office days.

• The availability of modern tools and technologies, as detailed in the "Tools & Technology Stack" section, ensures engineers have the necessary resources to be productive.

Work Schedule:

• The standard work schedule is likely aligned with typical business hours in New York (e.g., 9 AM - 5 PM ET), with an expectation of approximately 40 hours per week. The hybrid arrangement provides flexibility in managing these hours around in-office requirements.

📝 Enhancement Note: The hybrid model is a key component of the work environment, catering to modern workforce expectations. The specific mention of Hudson Yards suggests a modern office space conducive to collaboration and innovation within a major business hub.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will likely conduct an initial phone screen to assess basic qualifications, cultural fit, and salary expectations. This is a good time to articulate your interest in

FinTech and the company's mission.

• Technical Interviews: Expect multiple rounds of technical interviews. These may include:

  • Coding Challenges: Live coding sessions focusing on JavaScript, React, algorithms, and data structures. Be prepared to explain your thought process and consider edge cases.
  • System Design: A discussion around designing scalable and performant UI components or features, potentially related to trading platforms. Focus on architecture, trade-offs, and best practices.
  • Behavioral Questions: Questions designed to assess your experience with agile methodologies, teamwork, problem-solving, and handling challenging situations. Use the STAR method (Situation, Task, Action, Result).

• Portfolio Review/Discussion: You may be asked to walk through specific projects from your portfolio that demonstrate your UI/UX expertise, problem-solving skills, and impact.

• Final Round: Potentially a discussion with senior leadership or a final hiring manager interview to confirm fit and alignment with the team and company.

Portfolio Review Tips:

• Curate Selectively: Choose 3-4 projects that best highlight your senior-level UI/React skills, particularly those involving complex data, real-time updates, or significant performance optimizations.

• Focus on Impact: For each project, clearly articulate the problem you solved, your specific contributions, the technologies used, and the measurable outcomes or impact (e.g., improved performance by X%, reduced load times, increased user engagement).

• Prepare for Technical Deep Dives: Be ready to discuss architectural decisions, trade-offs made, testing strategies employed, and challenges encountered.

• Showcase Process: Demonstrate your understanding of the development lifecycle, from requirements gathering and design to implementation, testing, and deployment. Highlight your experience with agile and Git workflows.

Challenge Preparation:

• React Fundamentals: Refresh your knowledge of core React concepts, hooks, state management (Redux), component lifecycle, and performance optimization techniques.

• Data Handling: Practice working with large datasets and real-time data streams, as this is critical for trading platforms. Be familiar with efficient rendering strategies.

• Testing: Prepare to discuss and implement tests using Jest, React Testing Library, or end-to-end tools like Cypress/Playwright.

• Agile Simulation: Understand how to articulate your role within an agile team, including participation in ceremonies and collaboration.

📝 Enhancement Note: The interview process will likely be rigorous, reflecting the demanding nature of FinTech roles. A strong portfolio that showcases practical application of advanced UI development skills, coupled with clear communication of technical thought processes and business impact, will be key to success.

🛠 Tools & Technology Stack

Primary Tools:

• ReactJS: The core framework for building the user interface, requiring deep expertise in its ecosystem.

• JavaScript/TypeScript: Essential for front-end development, with TypeScript being preferred for its type safety and scalability.

• AG-Grid: A powerful data grid component, crucial for displaying and interacting with large volumes of financial data efficiently.

• Redux: The primary state management library for complex client-side applications, ensuring predictable state changes.

• Git/Git Flow: Standard version control system for collaborative development and code management.

• CSS Preprocessors (SASS/LESS) / CSS-in-JS (Styled Components) / Tailwind CSS: Tools for efficient and maintainable styling of the UI components.

Analytics & Reporting:

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

• Browser Developer Tools: Essential for debugging, performance profiling, and inspecting application behavior.

CRM & Automation:

• DevOps Tools (Desirable): Experience with CI/CD pipelines, containerization (Docker, Kubernetes), and related automation tools would be advantageous for modern development practices.

• WebSockets (Desirable): For real-time data streaming and communication between the client and server.

• Material UI (Desirable): A popular React UI component library for building consistent and aesthetically pleasing interfaces.

• OpenFin (Desirable): A specific technology for building and deploying financial desktop applications, which could be relevant for trading platforms.

📝 Enhancement Note: The technology stack is heavily focused on modern front-end development practices within the React ecosystem, with specific emphasis on tools critical for handling financial data and building complex interfaces. Experience with real-time data and DevOps is highly valued.

👥 Team Culture & Values

Operations Values:

• Innovation & Transformation: A drive to modernize and improve processes within a traditionally analog industry, encouraging new ideas and approaches.

• Collaboration & Teamwork: A culture that values open communication, knowledge sharing, and collective problem-solving. Expect active participation in code reviews and pair programming.

• Continuous Improvement & Learning: Encouragement to constantly learn new skills, adapt to changing demands, and refine existing processes and technologies.

• Customer Focus: A commitment to enhancing the user experience and delivering value to clients through a robust and intuitive trading platform.

• Excellence & Quality: A dedication to high standards in software engineering, ensuring the reliability, scalability, and performance of the platform.

Collaboration Style:

• Cross-functional Integration: Engineers work closely with product management, design, QA, and back-end teams to ensure seamless delivery of features.

• Agile Practices: Collaboration is structured around agile ceremonies like daily stand-ups, sprint planning, and retrospectives, fostering transparency and adaptability.

• Feedback & Mentorship: A culture that supports constructive feedback, pair programming, and knowledge sharing to uplift the entire team's capabilities.

• Experimentation: Openness to trying new approaches and technologies to solve problems, within a framework that balances innovation with stability.

📝 Enhancement Note: The company culture seems to balance the stability and rigor required in financial services with a modern, agile approach to technology development. The emphasis on learning, collaboration, and innovation is a strong indicator of a positive and growth-oriented team environment.

⚡ Challenges & Growth Opportunities

Challenges:

• Modernizing Legacy Systems: Transitioning a well-established financial trading platform to modern technologies and cloud infrastructure presents complex technical challenges.

• Real-time Data Handling: Effectively managing and displaying high-volume, real-time financial data with low latency and high accuracy requires sophisticated UI solutions.

• Balancing Innovation with Stability: In the FinTech space, adopting new technologies must be balanced with the critical need for platform stability, security, and regulatory compliance.

• Cross-Functional Alignment: Ensuring seamless integration and communication between front-end, back-end, and product teams to deliver cohesive solutions.

Learning & Development Opportunities:

• Advanced React & UI Techniques: Deepen expertise in cutting-edge React patterns, state management, performance optimization, and modern CSS architectures.

• FinTech Domain Knowledge: Gain in-depth understanding of fixed-income markets, trading workflows, and the regulatory landscape.

• Cloud & DevOps Skills: Opportunity to learn and work with public cloud platforms (e.g., AWS, Azure, GCP) and Kubernetes for modern application deployment and management.

• Mentorship & Leadership: Develop leadership skills by mentoring junior engineers, contributing to architectural discussions, and potentially taking on team lead responsibilities.

📝 Enhancement Note: The challenges presented are typical for companies undergoing digital transformation in established industries. The growth opportunities are substantial, offering a chance to develop highly sought-after skills in FinTech, modern web development, and cloud technologies.

💡 Interview Preparation

Strategy Questions:

• UI Architecture & Scalability: "How would you design a reusable component library for a large-scale financial trading platform? What considerations would you make for performance and scalability?" Focus on modularity, state management, and efficient rendering.

• Agile & Collaboration: "Describe a time you disagreed with a team member on a technical approach. How did you resolve it?" Emphasize communication, compromise, and focusing on project goals.

• Problem-Solving & Efficiency: "Walk me through a complex UI bug you encountered and how you debugged it. What tools did you use, and what was the root cause?" Highlight your systematic approach and efficiency in resolution.

Company & Culture Questions:

• MarketAxess Mission: "What excites you about MarketAxess's mission to digitally transform the fixed-income market?" Research the company's impact and articulate your alignment.

• Team Dynamics: "How do you contribute to a positive and productive team environment?" Discuss your collaborative style, mentorship approach, and commitment to shared goals.

• Operations Impact: "How would your UI development efforts directly contribute to improving efficiency and transparency for institutional traders on our platform?" Connect your technical skills to business outcomes.

Portfolio Presentation Strategy:

• Structure: For each project, follow a clear narrative: Problem -> Solution (Your Role, Tech Stack, Key Decisions) -> Results/Impact.

• Metrics: Quantify achievements whenever possible (e.g., "Improved data load time by 30%," "Reduced component rendering time by 15%").

• Interaction: Be prepared to answer deep technical questions about your code, architectural choices, and trade-offs. Show enthusiasm for discussing your work.

• Company Relevance: Tailor your presentation to highlight skills and experiences most relevant to MarketAxess's needs, such as financial data handling, real-time updates, and complex UI development.

📝 Enhancement Note: Preparation should focus on demonstrating not only technical proficiency but also strong problem-solving skills, collaborative spirit, and an understanding of the business context. A well-prepared portfolio walkthrough is critical for showcasing practical experience.

📌 Application Steps

To apply for this Senior Software Engineer, UI (RFQ) position:

• Submit your application through the provided link on the MarketAxess careers page.

• Portfolio Customization: Tailor your resume and portfolio to highlight your most relevant experience with ReactJS, AG-Grid, Redux, TypeScript, and complex UI development, particularly in data-intensive applications. Prioritize projects that demonstrate performance optimization and excellent UX/UI design.

• Resume Optimization: Ensure your resume clearly outlines your 7+ years of enterprise software development experience and 4+ years of ReactJS experience. Use action verbs and quantify achievements where possible, focusing on roles and responsibilities that align with the job description.

• Interview Preparation: Thoroughly review common JavaScript, React, and system design interview questions. Practice articulating your thought process for coding challenges and prepare specific examples for behavioral questions using the STAR method. Be ready to discuss your portfolio in detail.

• Company Research: Familiarize yourself with MarketAxess's business, its mission to transform fixed-income trading, and its commitment to technology and innovation. Understand the value proposition of their platform for institutional clients.

⚠️ 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.