Sr Lead Software Engineer - Java / Python

JPMorgan Chase & Co.; Greater London; On-site; GBP 120,000 - 170,000; Full time

Job summary

JPMorganChase in London is seeking a Sr Lead Software Engineer (Java/Python) to help design, build, and deliver high-performance trading software within Digital Markets Execution Technology. You’ll contribute as a core technical member of an agile team, guiding architecture, coding, testing, and operations to meet ambitious objectives.

The role emphasizes secure, observable, and resilient systems, with leadership in code reviews, API design, and deployment across distributed environments.

Qualifications

• Formal training or certification in software engineering concepts and advanced applied experience in Java/Python.
• Hands-on experience delivering system design, application development, testing, and operational stability for mission-critical platforms.
• Advanced in one or more programming languages with deep hands-on expertise in Java (17+).
• Experience designing clean APIs and rollout strategies for distributed systems.

Responsibilities

• Executes and oversees end-to-end software solutions, engineering standards, architecture, and technical troubleshooting for trading systems.
• Designs and builds high-performance, latency-sensitive services with awareness of upstream/downstream dependencies.
• Develops secure production code and reviews code written by others.
• Leads technical analysis, estimation, planning, code reviews, architecture sessions, and retrospectives.

Skills

Java (17+)

Python

Spring/Spring Boot

Kubernetes

Linux

API design

CI/CD

Microservices

AI-assisted tooling

Security practices

Distributed systems

Code reviews

Tools

Docker

Kafka

MQ/Solace

FIX

CI/CD pipelines

Job description

Sr Lead Software Engineer - Java / Python

LONDON, LONDON, United Kingdom

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.

As a Lead Software Engineer at JPMorganChase within Digital Markets Execution Technology, Execute, 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. As a core technical contributor, you are responsible for conducting critical technology solutions across multiple technical areas within various business functions in support of the firm’s business objectives.

Job responsibilities

• Executes and oversees end-to-end software solutions, engineering standards, architecture, and technical troubleshooting for trading systems
• Designs and builds high-performance, latency-sensitive services with awareness of upstream/downstream system dependencies
• Develops secure and high-quality production code, and reviews and debugs code written by others
• Leads technical analysis, estimation, planning, code reviews, architecture sessions, and retrospectives to drive delivery outcomes
• Establishes reliability goals and implements observability, resilience patterns, and operational readiness practices
• Leads incident response and post-incident reviews to improve production stability and performance; identifies recurring issues and drives automation/remediation
• Upholds secure-by-default engineering practices and risk/control standards across the SDLC
• Guides integration contracts, API/versioning strategies, and deprecation paths for platform services
• Drives team adoption of enterprise-authorized AI-assisted engineering practices across the SDLC toolchain to improve code quality, delivery speed, and operational outcomes, while setting validation standards for correctness, performance, and security
• Mentors engineers and contributes to a culture of inclusion, respectful collaboration, and continuous improvement aligned to measurable outcomes

Required qualifications, capabilities, and skills

• Formal training or certification on software engineering concepts and advanced applied experience in Java / Python
• Hands‑on practical experience delivering system design, application development, testing, and operational stability for mission‑critical platforms
• Advanced in one or more programming language(s), with deep hands‑on expertise in Java (17+), including concurrency, memory management, and object‑oriented design
• Demonstrated experience designing clean APIs and rollout strategies for distributed systems (including integration and backward compatibility considerations)
• Practical experience with Spring/Spring Boot, microservices, Kubernetes, Linux, and core networking/messaging concepts
• Proficient in all aspects of the Software Development Life Cycle, including CI/CD, automated testing practices, application resiliency, and security
• Demonstrated experience leading effective use of enterprise‑approved AI‑assisted software development tools (e.g., for coding, code review, test acceleration, troubleshooting) with the ability to set team expectations for validating AI outputs for correctness, performance, and security
• Strong understanding of responsible AI use in engineering workflows, including data sensitivity considerations and secure handling of inputs/outputs, aligned to resiliency and security expectations
• Effective communication with technical and non‑technical audiences; ability to operate in globally distributed teams

Preferred qualifications, capabilities, and skills

• Exposure to messaging systems and market protocols (e.g., MQ/Kafka; familiarity with FIX and Solace)
• Experience with observability stacks and resilience engineering for low‑latency / latency‑sensitive platforms
• Familiarity with Python

Experience operating services in regulated environments with strong auditability and controls

About Us

J.P. Morgan is a global leader in financial services, providing strategic advice and products to the world’s most prominent corporations, governments, wealthy individuals and institutional investors. Our first‑class business in a first‑class way approach to serving clients drives everything we do. We strive to build trusted, long‑term partnerships to help our clients achieve their business objectives.

We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit ourFAQs for more information about requesting an accommodation.

About the Team

J.P. Morgan’s Commercial & Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial & Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.