Senior Lead Software Engineer - React / C++ / Rust

We have an opportunity to impact your career and provide an adventure where you can push the limits of what's possible

As a Lead Software Engineer at JPMorganChase within the Markets Org, 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.

You will assist in the development of Sigma - the firm's internal data visualization platform - its data adapter ecosystem, and an open-source streaming analytics engine built on WebAssembly and Apache Arrow.

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


* Drives roadmap decisions on the C++/Rust → WebAssembly engine, Apache Arrow integration, custom element viewer plugins (datagrid, D3FC charting), and client/server WASM initialization pipeline


* Executes creative software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or break down technical problems


* Helps Architect and evolve the Sigma platform (Next.js 15 / React 18 / TypeScript), including its Zustand-based state management, Salt Design System component library, Dockview layout engine, and Emotion CSS-in-JS theming layer


* Develops and extends the Sigma Data Adapters library - a suite of TypeScript adapters (HTTP, Hydra, AMPS, KDB, WebSocket, SCX, Udex, and others) that stream data from internal JPMC APIs into Perspective Tables


* Develops secure high-quality production code, and reviews and debugs code written by others


* Drives WebAssembly performance tuning and ensures efficient data serialization via Apache Arrow across browser and server contexts


* Identifies opportunities to eliminate or automate remediation of recurring issues to improve overall operational stability of software applications and systems


* Leads evaluation sessions with external vendors, startups, and internal teams to drive outcomes-oriented probing of architectural designs, technical credentials, and applicability for use within existing systems and information architecture


* Leads communities of practice across Software Engineering to drive awareness and use of new and leading-edge technologies


* Adds to team culture of diversity, opportunity, inclusion, and respect

Required qualifications, capabilities, and skills


* At least 10 years of relevant experience in software engineering


* Hands-on practical experience delivering system design, application development, testing, and operational stability


* Advanced proficiency in TypeScript and JavaScript with deep experience in the React ecosystem (hooks, memoization, refs, custom elements interop)


* Strong experience with modern front-end frameworks such as Next.js (Ap...