Senior Lead Software Engineer - Full Stack ReactJS, Java, Python, AWS, AI/ML

Testing Site - JPMC; Greater London; On-site; GBP 120,000 - 150,000; Full time

Job summary

JPMorganChase in London is seeking a Senior Lead Software Engineer to guide an agile team delivering secure, scalable cloud-native platforms. You will drive technical direction, code reviews, and mentorship while building production-grade interfaces.

Strong proficiency in React/TypeScript, Java, Python, AWS, and cloud native design is essential, along with leadership and collaboration across functions.

Qualifications

• Hands-on full stack development experience, with at least 3 years in a technical leadership or lead developer role.
• Expert proficiency in React, TypeScript, modern JavaScript (ES6), HTML5, and CSS3, with a track record of building accessible, high-performance, production-grade interfaces.
• Experience integrating APIs or services into front-end applications.
• Building enterprise grade systems using Java, Python, AWS
• Hands-on practical experience delivering system design, application development, testing, and operational stability
• Advanced in one or more programming languages
• Advanced knowledge of software applications and technical processes with considerable in-depth knowledge in one or more technical disciplines (cloud, AI, ML, mobile, etc.)
• Ability to tackle design and functionality problems independently with little oversight
• Practical cloud native experience
• Experience in Computer Science, Computer Engineering, Mathematics, or related technical field

Responsibilities

• Provides technical guidance to business and technical teams, contractors, and vendors.
• Develops secure, high-quality production code and reviews code.
• Drives decisions influencing product design and operations.
• Acts as subject matter expert in areas of focus.
• Advocates firmwide SDLC frameworks, tools, and practices.
• Influences peers and decision-makers to adopt leading-edge technologies.
• Contributes to a team culture of diversity and inclusion.

Skills

Full stack development

React

TypeScript

Java

Python

AWS

Leadership

Education

Computer Science / related field

Engineering or Math background

Tools

REST APIs

GraphQL

CI/CD

Job description

Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products to revolutionize business decisions and workflow for cloud migration.

As a Senior Lead Software Engineer at JPMorganChase within the Infrastructure Platform, you are an integral part of an agile team that works to enhance, build, and deliver trusted market-leading technology products in a secure, stable, and scalable way. Drive significant business impact through your capabilities and contributions, and apply deep technical expertise and problem-solving methodologies to tackle a diverse array of challenges that span multiple technologies and applications.

Job responsibilities

• Regularly provides technical guidance and direction to support the business and its technical teams, contractors, and vendors
• Develops secure and high-quality production code, and reviews and debugs code written by others
• Drives decisions that influence the product design, application functionality, and technical operations and processes
• Serves as a function-wide subject matter expert in one or more areas of focus
• Actively contributes to the engineering community as an advocate of firmwide frameworks, tools, and practices of the Software Development Life Cycle
• Influences peers and project decision-makers to consider the use and application of leading-edge technologies
• Adds to the team culture of diversity, opportunity, inclusion, and respect

Required qualifications, capabilities, and skills

• Hands-on full stack development experience, with at least 3 years in a technical leadership or lead developer role.
• Expert proficiency in React, TypeScript, modern JavaScript (ES6), HTML5, and CSS3, with a track record of building accessible, high-performance, production-grade interfaces.
• Experience integrating APIs or services into front-end applications.
• Building enterprise grade system using Java, Python, AWS
• Hands-on practical experience delivering system design, application development, testing, and operational stability
• Advanced in one or more programming language(s)
• Advanced knowledge of software applications and technical processes with considerable in-depth knowledge in one or more technical disciplines (e.g., cloud, artificial intelligence, machine learning, mobile, etc.)
• Ability to tackle design and functionality problems independently with little to no oversight
• Practical cloud native experience
• Experience in Computer Science, Computer Engineering, Mathematics, or a related technical field

Preferred qualifications, capabilities, and skills

• Demonstrated leadership working with engineers, product, stakeholders.
• Knowledge of best practices for building user experiences that incorporate generative and agentic AI.
• Practical experience applying generative AI and agentic workflows to accelerate development (e.g., AI-assisted code and test generation, refactoring, documentation), with strong judgment, governance, and quality control over AI-produced outputs.
• Experience optimizing performance and reliability of AI-powered user interfaces & proficiency in React framework
• Understanding of REST APIsand GraphQL
• Comfortable working with projects partially or fully usingTypeScript & using latestReact featuressuch as Suspense and Hooks
• End to end testing applications