Senior Lead Software Engineer & UI Developer & React

The Design Project; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

A financial technology corporation in London is seeking a Senior Lead Software Engineer specializing in front-end development with React. Candidates should possess at least 5 years of software engineering experience and a solid grasp of mentoring technical teams. This role emphasizes leadership, strategic decision-making, and the delivery of robust, high-quality solutions within a dynamic financial environment. Competitive salary and excellent benefits are offered alongside opportunities for professional growth.

Benefits

Comprehensive health insurance

Generous paid time off

Professional development opportunities

Qualifications

• 5+ years of experience in software engineering.
• Ability to independently tackle complex design and functionality problems.
• Hands-on experience with cloud-native technologies.

Responsibilities

• Lead the enhancement and delivery of technology products.
• Provide technical guidance to teams and vendors.
• Collaborate with stakeholders to drive product design decisions.

Skills

Advanced proficiency in programming languages

Deep understanding of software applications

Technical guidance and mentorship

Experience with Agile methodologies

Education

Bachelor's degree in Computer Science

Tools

React

AWS

AG Grid

Git

Job description

Sr Lead Software Engineer - UI Developer - React

Full_time • London, United Kingdom

Job Title: Sr Lead Software Engineer - UI Developer - ReactCompany: JPMorgan Chase & Co.Location: London, England, United KingdomJob Type: Full timeCategory: Software Engineering / Front-End DevelopmentDate Posted: January 19, 2026Experience Level: 5-10 yearsRemote Status: On-site

• Lead the enhancement, building, and delivery of market-leading technology products within the Equities Sales and Trading Technology division.
• Provide critical technical guidance and direction to internal teams, contractors, and vendors, ensuring secure, stable, and scalable solutions.
• Develop and review high-quality, production-ready code, contributing significantly to product design, application functionality, and technical operations.
• Serve as a subject matter expert in key technical disciplines, driving innovation and influencing the adoption of cutting‑edge technologies.
• Actively foster a team culture of diversity, opportunity, inclusion, and respect.

📝 Enhancement Note: While the title specifies "UI Developer - React," the responsibilities and requirements indicate a broader "Lead Software Engineer" role with a strong front‑end focus. The role requires not only development but also significant technical leadership, system design influence, and cross‑functional collaboration within a financial services technology context.

📈 Primary Responsibilities

• Provide comprehensive technical guidance and mentorship to software engineering teams, contractors, and external vendors, ensuring alignment with firm‑wide architectural standards and best practices.
• Drive strategic decisions impacting product design, application functionality, and the optimization of technical operations and SDLC processes, ensuring scalability, performance, and reliability.
• Act as a recognized subject matter expert in one or more technical domains, such as advanced front‑end architecture, performance optimization, cloud‑native development, or specific financial trading systems.
• Champion the adoption and effective utilization of firm‑wide software development frameworks, tools, and best practices across the Software Development Life Cycle (SDLC), promoting engineering excellence.
• Influence peers, product managers, and project stakeholders to evaluate and integrate leading‑edge technologies, fostering innovation and continuous improvement within the team.
• Contribute actively to building and maintaining a positive and inclusive team culture, championing diversity, equal opportunity, and mutual respect in all interactions.

📝 Enhancement Note: The responsibilities are framed to emphasize leadership and strategic contribution beyond pure coding, aligning with a "Sr Lead" title. The mention of "Equities Sales and Trading Technology" suggests a need for understanding financial market dynamics and the associated demands on technology.

🎓 Skills & Qualifications

Education:

• Bachelor's degree in Computer Science, Computer Engineering, Mathematics, or a closely related technical field.

Experience:

• A minimum of 5+ years of applied experience in software engineering, with a proven track record of delivering robust system designs, application development, rigorous testing, and ensuring operational stability.
• Demonstrated experience in delivering system design, application development, testing, and operational stability.
• Practical, hands‑on experience with cloud‑native technologies and architectures.

Required Skills:

• Advanced proficiency in at least one programming language, with a strong foundation applicable to complex enterprise systems.
• Deep understanding of software applications and technical processes, with significant expertise in one or more technical disciplines (e.g., cloud computing, AI, ML, mobile development).
• Proven ability to independently tackle complex design and functionality problems with minimal oversight.
• Strong grasp of software engineering concepts, evidenced by formal training, certifications, or equivalent practical experience.
• Experience in debugging complex software issues and implementing effective solutions.
• Demonstrated ability to provide technical guidance and mentorship to junior engineers and cross‑functional teams.

Preferred Skills:

• Expertise in React version 17 or later, along with a comprehensive understanding of modern front‑end development practices, component‑based architecture, and state management.
• Experience with advanced data grid libraries such as AG Grid, enabling efficient display and interaction with large, high‑frequency datasets.
• Proven ability to optimize web applications for peak performance, responsiveness, and excellent user experience, utilizing profiling and tuning techniques.
• Familiarity with handling and visualizing high‑frequency data updates in real‑time within UI applications.
• Strong understanding of application profiling tools and performance tuning methodologies.
• Knowledge of AI integration principles or cloud technologies, with a preference for AWS.
• Experience working within fast‑paced, agile development environments, particularly in the financial services sector.

📝 Enhancement Note: The preferred skills highlight specific front‑end technologies and financial industry context, which are critical for success in this role. The "5+ years of applied experience" combined with "advanced knowledge" suggests a mid‑to‑senior level of expertise.

• Demonstrate a portfolio showcasing successful front‑end application development projects, particularly those involving complex UIs, data visualization, and performance optimization.
• Provide case studies highlighting the design and implementation of scalable, responsive, and user‑friendly web applications, with clear explanations of architectural decisions.
• Include examples of how you have integrated new technologies or improved existing systems to enhance efficiency, user experience, or operational stability.
• Showcase contributions to projects that required significant problem‑solving, debugging, and collaboration within an agile framework.

Process Documentation:

• Document your approach to designing and developing front‑end components and features, emphasizing reusability, maintainability, and adherence to coding standards.
• Illustrate your methods for performance profiling, bottleneck identification, and implementing optimizations to ensure fast load times and smooth user interactions.
• Detail your experience with Agile methodologies, including sprint planning, daily stand‑ups, and retrospectives, and how you contribute to process improvement within the team.
• Provide examples of how you have collaborated with backend engineers and product managers to define APIs, manage data flow, and ensure seamless integration of front‑end and back‑end systems.

📝 Enhancement Note: For a Sr. Lead Engineer role, a portfolio is crucial. It should emphasize not just finished products but the process behind them, including design choices, problem‑solving, performance tuning, and collaboration. This section guides candidates on what kind of evidence to prepare.

Salary Range:

• Based on JPMorgan Chase & Co.'s compensation practices for Senior Lead Software Engineers in London, and considering the required 5‑10 years of experience and specialized skills in React and financial technology, an estimated annual salary range would be between £90,000 and £130,000. This estimate is derived from industry benchmarks for similar roles in London's financial sector, factoring in the seniority and technical depth required.
• Comprehensive health, dental, and vision insurance plans.
• Generous paid time off (PTO), including vacation, sick leave, and public holidays.
• Retirement savings plan (e.g., company‑matched pension scheme).
• Opportunities for professional development, including training, certifications, and conference attendance.
• Employee assistance programs and wellness initiatives.
• Potential for performance‑based bonuses and stock options.
• Access to company‑wide benefits and discounts.

Working Hours:

• Standard full‑time working hours are typically 40 hours per week. While the role is on‑site, JPMorgan Chase & Co. often supports flexible working arrangements where appropriate and agreed upon with management, balancing business needs with employee flexibility.

📝 Enhancement Note: Salary is an estimate based on general market data for senior engineering roles in London's financial industry. Specific benefits are typical for large financial institutions and should be confirmed directly with the employer. The "on‑site" nature is noted, but standard corporate flexibility policies might apply.

Industry: Financial Services / Investment Banking TechnologyCompany Size: 100,000+ employeesFounded: 1871 (JPMorgan Chase & Co.)

Team Structure:

• The role is within the Equities Sales and Trading Technology division, indicating a specialized team focused on supporting critical trading platforms and client‑facing applications.
• As a Senior Lead Engineer, you will likely report to an Engineering Manager or Director, and will be expected to mentor and guide a team of 3-7 software engineers, potentially including junior developers, mid‑level engineers, and contractors.
• This team will collaborate closely with various stakeholders, including traders, sales teams, product managers, other engineering teams (e.g., backend, QA, DevOps), and potentially business analysts.

Methodology:

• The team operates within an agile framework, likely utilizing methodologies such as Scrum or Kanban to manage the software development lifecycle. This involves iterative development, continuous integration and deployment (CI/CD) practices, and a focus on rapid feedback loops.
• Emphasis is placed on data‑driven decision‑making, leveraging application performance metrics, user feedback, and business impact analysis to prioritize development efforts and measure success.
• Workflow planning and optimization are continuous processes, aiming to streamline development, testing, and deployment pipelines to enhance team velocity and product quality.
• Automation is a key focus, from testing and deployment to operational monitoring and incident response, driving efficiency and reducing manual effort.

📝 Enhancement Note: JPMorgan Chase is a global financial services giant. The "Equities Sales and Trading Technology" context implies a high‑stakes, fast‑paced environment demanding robust, performant, and secure solutions. The company's size suggests established processes and a structured approach to engineering.

Operations Career Level: Senior Lead Software Engineer

• This role represents a significant step in a software engineering career, moving beyond individual contribution to encompass technical leadership, mentorship, and strategic influence. It requires a deep technical skill set combined with the ability to guide teams and shape technical direction. This level is often a precursor to management or principal engineering roles.

Reporting Structure:

• You will report to a senior technology leader within the Equities Sales and Trading Technology group. You will be expected to lead and mentor a team of software engineers, fostering their technical and professional growth, and ensuring the team's output aligns with departmental and firm‑wide objectives.

Operations Impact:

• As a Senior Lead Engineer in Equities Sales and Trading Technology, your impact is directly tied to the performance, stability, and functionality of the systems that support critical trading operations. Your contributions will influence revenue generation, risk management, and the overall client experience by ensuring the delivery of reliable and efficient trading tools and platforms.
• Technical Specialization: Deepen expertise in areas like high‑frequency trading UIs, advanced front‑end performance tuning, cloud‑native architectures for trading systems, or emerging UI technologies.
• Leadership Development: Transition into management roles (e.g., Engineering Manager) or pursue principal engineer tracks, focusing on architecting complex systems and driving firm‑wide technical strategy.
• Cross‑Functional Exposure: Gain experience working with diverse teams across trading desks, quantitative research, risk management, and other technology domains within the investment bank.
• Industry Certifications & Training: Access to extensive internal and external training programs, as well as opportunities to pursue relevant industry certifications in cloud, security, or financial technology.

📝 Enhancement Note: The role emphasizes leadership and impact within a specialized financial technology domain, offering clear paths for career advancement in either technical leadership or people management.

Office Type: Corporate Office EnvironmentOffice Location(s): 25 Bank Street, Canary Wharf, London, E14 5JP. This is a prominent financial district location, suggesting a professional and collaborative workplace.

Workspace Context:

• The workspace is likely a modern, open‑plan office designed to foster collaboration among engineering teams. You will have access to high‑performance workstations and a robust IT infrastructure to support development activities.
• Expect regular interaction with team members, product owners, and other engineering disciplines, facilitating quick problem‑solving and knowledge sharing.
• The environment is fast‑paced and dynamic, characteristic of investment banking technology, requiring adaptability and a proactive approach to challenges.

Work Schedule:

• The role is on‑site, requiring your presence in the London office. Standard working hours will apply, with expectations for flexibility to meet project deadlines and critical business needs, especially given the 24/7 nature of financial markets.

📝 Enhancement Note: The on‑site requirement in a major financial hub like Canary Wharf implies a traditional corporate setting focused on in‑person collaboration and adherence to established work protocols within the financial services industry.

Interview Process:

• Initial Screening: A recruiter or hiring manager will review your application and conduct an initial phone screen to assess basic qualifications, experience, and cultural fit.
• Technical Interview(s): Expect one or more rounds of technical interviews. These may include:
  • Coding Challenges: Live coding sessions focusing on algorithm, data structure, and problem‑solving skills, often using a shared editor.
  • System Design: Discussions on how to architect scalable, performant, and robust front‑end applications, including trade‑offs and technology choices.
  • Behavioral Questions: Questions designed to assess your leadership, teamwork, problem‑solving approach, and how you handle challenging situations.
• Portfolio Presentation: You may be asked to present a selection of your past work, focusing on your role, design decisions, technical challenges overcome, and the impact of your contributions.
• Final Interview: A discussion with senior leadership or the hiring manager to finalize the decision, focusing on overall fit, strategic thinking, and long‑term potential.
• Curate Strategically: Select 2-3 impactful projects that best demonstrate your expertise in React, UI development, performance optimization, and system design.
• Focus on Impact: For each project, clearly articulate the business problem, your specific contribution, the technical challenges faced, the solutions implemented, and the measurable outcomes (e.g., performance improvements, user adoption, efficiency gains).
• Highlight Process: Be prepared to discuss your development process, including your approach to requirements gathering, design, coding standards, testing strategies, and deployment.
• Technical Depth: Be ready to dive deep into the technical details of your projects, explaining architectural choices, trade‑offs, and the reasoning behind them.
• Tailor to the Role: Emphasize aspects of your portfolio that align with the requirements of this Sr. Lead Software Engineer role, such as leadership, mentorship, performance optimization, and handling complex data.
• Algorithm & Data Structures: Practice common coding interview questions, focusing on efficiency (time and space complexity) and common patterns.
• React Fundamentals: Review core React concepts, hooks, state management (e.g., Redux, Context API), component lifecycle, and performance best practices.
• System Design Scenarios: Prepare for questions about designing scalable UIs, handling real‑time data, and optimizing for performance in large‑scale applications.
• Agile & Teamwork: Be ready to discuss your experience in agile environments and how you collaborate effectively with cross‑functional teams.

📝 Enhancement Note: This section is tailored to a senior engineering role, emphasizing the need for a strong portfolio that showcases not just coding ability but also leadership, strategic thinking, and a deep understanding of the development lifecycle and performance optimization within a demanding financial context.

Primary Tools:

• HTML5 & CSS3: Strong understanding of semantic HTML, CSS preprocessors (e.g., Sass, LESS), and responsive design principles.
• AG Grid: Expertise with advanced data grid libraries for managing and displaying large, high‑frequency datasets effectively.

Analytics & Reporting:

• Performance Monitoring Tools: Familiarity with tools like Lighthouse, WebPageTest, or integrated application performance monitoring (APM) solutions for identifying and resolving performance bottlenecks.
• Analytics Platforms: Experience with integrating and utilizing analytics platforms (e.g., Google Analytics, Adobe Analytics, or internal solutions) to track user behavior and application engagement.

CRM & Automation:

• Version Control: Mastery of Git, including branching strategies, pull requests, and collaborative workflows.
• CI/CD Tools: Experience with CI/CD pipelines (e.g., Jenkins, GitLab CI, Azure DevOps) for automated testing and deployment.
• Cloud Platforms (AWS): Familiarity with cloud services, particularly AWS, for hosting, scaling, and deploying front‑end applications, and potentially for integration with other services.
• Testing Frameworks: Proficiency in unit testing (e.g., Jest, React Testing Library), integration testing, and end‑to‑end testing (e.g., Cypress, Playwright).

📝 Enhancement Note: This stack reflects a modern front‑end development environment with a specific emphasis on performance, data handling, and integration within a large enterprise, particularly highlighting React and AG Grid as key technologies.

Operations Values:

• Excellence & Quality: A commitment to delivering robust, high‑quality software that meets stringent performance and reliability standards. This translates to meticulous coding, thorough testing, and continuous improvement of development processes.
• Innovation & Continuous Learning: Encouraging the exploration of new technologies and methodologies to enhance product offerings and development efficiency. This involves staying abreast of industry trends and proactively seeking opportunities for skill development.
• Collaboration & Teamwork: Fostering an environment where diverse perspectives are valued, and team members work together effectively to achieve common goals. This includes open communication, mutual respect, and shared ownership of outcomes.
• Accountability & Ownership: Taking responsibility for one's work, from design and development through to deployment and ongoing maintenance.
• Integrity & Ethics: Upholding the highest standards of integrity in all business dealings, particularly crucial in the financial services industry where trust and security are paramount.
• The team embraces a collaborative approach, working closely with product managers, business stakeholders, and other engineering teams (backend, QA, DevOps) to ensure seamless integration and alignment.
• Regular cross‑functional meetings, code reviews, and knowledge‑sharing sessions are integral to the team's workflow, promoting transparency and collective problem‑solving.
• Feedback is actively encouraged, with a culture that supports constructive criticism and continuous process refinement through retrospectives and open dialogue.

📝 Enhancement Note: The values and collaboration style reflect a professional, high‑performance culture typical of leading financial institutions, emphasizing technical excellence, teamwork, and ethical conduct.

• High‑Frequency Data Management: Effectively displaying and interacting with real‑time, high‑volume data streams in the UI presents significant performance and architectural challenges.
• Legacy System Integration: Balancing the adoption of modern technologies with the need to integrate with and maintain existing legacy systems within a large enterprise.
• Rapidly Evolving Technology Landscape: Keeping pace with the fast‑changing front‑end ecosystem, including new libraries, frameworks, and best practices, while maintaining stability.
• Regulatory Compliance & Security: Ensuring all developed applications meet stringent regulatory requirements and robust security standards inherent to the financial services industry.
• Stakeholder Alignment: Managing and aligning the expectations of diverse stakeholders, including traders, sales, and other business units, with technical capabilities and timelines.
• Advanced React & Front‑End Architecture: Access to training and resources to deepen expertise in advanced React patterns, state management, server‑side rendering, and micro‑frontend architectures.
• Cloud & DevOps Skills: Opportunities to expand knowledge in cloud technologies (AWS), CI/CD practices, containerization (Docker, Kubernetes), and infrastructure as code.
• Financial Markets & Trading Systems: Gaining in‑depth knowledge of the equities sales and trading business, market data, and the specific technological demands of this domain.
• Leadership & Mentorship Training: Formal programs and on‑the‑job experience in leading teams, mentoring junior engineers, and developing strategic technical vision.
• Industry Conferences & Certifications: Support for attending relevant industry conferences and pursuing professional certifications to enhance technical and leadership skills.

📝 Enhancement Note: The challenges are specific to the financial trading technology domain, while growth opportunities are framed to align with career progression in both technical and leadership capacities.

Strategy Questions:

• Technical Strategy: "Describe a complex front‑end challenge you've faced, such as handling high‑frequency data or optimizing performance, and detail the steps you took to design and implement a solution. What were the trade‑offs?" (Prepare a case study focusing on your problem‑solving process, architectural decisions, and measured outcomes.)
• Team Leadership & Collaboration: "How do you approach mentoring junior engineers? Describe a time you had to influence a team or stakeholders to adopt a new technology or approach." (Prepare examples demonstrating your leadership style, communication skills, and ability to drive consensus.)
• Problem Solving & Efficiency: "Imagine a scenario where a critical trading UI is experiencing significant lag during peak market hours. How would you diagnose and resolve this issue?" (Think about your debugging process, performance analysis tools, and strategies for quick resolution and long‑term fixes.)

Company & Culture Questions:

• "What interests you about working in Equities Sales and Trading Technology at JPMorgan Chase?" (Research the company's recent performance, technology initiatives, and specific challenges in the financial trading space.)
• "How do you contribute to a diverse and inclusive team environment?" (Be ready to share examples of how you promote inclusivity and respect in your work.)
• "How do you measure the success of your technical contributions and their impact on the business?" (Focus on quantifiable metrics and aligning technical work with business objectives.)
• Structure: Begin with an overview of the project's business context and objectives, then detail your specific role and contributions, dive into the technical architecture and key implementation choices, discuss challenges and solutions, and conclude with the impact and lessons learned.
• Visuals: Use diagrams (architecture, data flow), code snippets (selectively), and performance graphs to illustrate your points effectively.
• Storytelling: Frame your projects as narratives that highlight your problem‑solving skills, technical expertise, and ability to deliver value.
• Engagement: Be prepared to answer in‑depth questions about your work and demonstrate your passion for technology and continuous improvement.

📝 Enhancement Note: This preparation guide focuses on demonstrating technical leadership, strategic thinking, and a deep understanding of the development lifecycle and performance optimization within a demanding financial context.

To apply for this Sr. Lead Software Engineer position:

• Submit your application through the Oracle Cloud candidate portal.
• Portfolio Preparation: Curate your portfolio to showcase 2-3 key projects that best exemplify your skills in React, complex UI development, performance tuning, and leadership. Prepare to articulate your contributions, technical decisions, and the impact of your work.
• Interview Practice: Practice answering common software engineering interview questions, including coding challenges, system design scenarios, and behavioral questions, specifically focusing on leadership and problem‑solving.
• Company Research: Familiarize yourself with JPMorgan Chase & Co., its technology division, and the Equities Sales and Trading sector. Understand the company's values and recent news to tailor your responses and demonstrate genuine interest.

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

Application Requirements

Candidates should have formal training in software engineering concepts with over 5 years of experience, along with advanced knowledge in programming languages and technical disciplines. Practical experience in cloud technologies and the ability to work independently on design and functionality problems are also required.