Smalltalk Software Engineer III
JPMorganChase
Software Engineering
Glasgow, UK
Posted on Feb 16, 2026
Join our Kapital Platform Engineering team and help shape the future of trading technology at one of the world's leading financial institutions. You'll work on Kapital—our sophisticated trade and risk management platform that powers $4 billion in Global Rates trading decisions daily.
We're in the midst of an exciting modernization journey, migrating to cutting-edge infrastructure and transforming how we deliver technology solutions. As a Software Engineer III, you'll be a key contributor to this transformation, working with unique technologies including Smalltalk (yes, really!), alongside modern tools and practices including Python, C, and shell scripting.
Job responsibilities
- Solve complex technical challenges by designing and building innovative solutions that go beyond conventional approaches
- Own your code from conception to production—write secure, high-quality software and shepherd it through its entire lifecycle
- Shape our technical architecture by creating design artifacts for complex changes and ensuring development meets our quality standards
- Turn data into action by analyzing patterns across diverse datasets and using insights to continuously improve our systems
- Be a technical detective—spot hidden problems and patterns before they become issues, driving improvements to code quality and system design
- Learn and share by engaging with our engineering communities, exploring emerging technologies, and bringing fresh ideas to the team
- Build an inclusive culture by contributing to our team's commitment to diversity, equity, inclusion, and respect
Required qualifications, capabilities, and skills
- Strong object-oriented programming skills (we value clean, maintainable code)
- Applied software engineering experience in a corporate environment
- Formal training or certification in software engineering concepts
- Deep understanding of the software development lifecycle and agile practices
- Hands-on experience with automated testing, CI/CD, application resiliency, and security
- Proficiency with version control systems, particularly Git
- Experience developing, debugging, and maintaining code across the full-stack
- Bachelor's degree in Computer Science or related field, or equivalent professional experience
Preferred qualifications, capabilities, and skills
- Smalltalk experience (but if you're a strong OOP developer eager to learn, we'll teach you!)
- RedHat Linux experience
- Windows development experience with tools like IntelliJ IDEA
- API development experience (REST, OpenAPI)
- Cloud platform knowledge (AWS)
- Python, Java, or shell scripting skills
- Familiarity with Jira project management tooling
- Experience with wiki-based documentation systems like Confluence
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 our FAQs for more information about requesting an accommodation.
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.
Design and deliver market-leading technology products in a secure and scalable way as a seasoned member of an agile team.