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 (App Router), webpack, and esbuild

• Proficiency in automation and continuous delivery methods (Jenkins, SonarQube, code-coverage gating)

• Proficient in all aspects of the Software Development Life Cycle

• Advanced understanding of agile methodologies such as CI/CD, Application Resiliency, and Security

• Experience with component-driven development and testing workflows (Storybook, Jest, Cypress component testing)

• Demonstrated proficiency in state management patterns (Zustand, or equivalent), including persisted and devtools-instrumented stores

• In-depth knowledge of the financial services industry and their IT systems

• Practical cloud native experience (Gaia Cloud or comparable PaaS)

Preferred qualifications, capabilities, and skills

• Direct experience with FINOS Perspective - its viewer API, plugin system, table/view lifecycle, and data-binding model

• Working knowledge of WebAssembly (compiling C++ or Rust to WASM, debugging WASM modules, optimizing load and execution performance)

• Familiarity with Apache Arrow as an in-memory columnar data format and its role in high-performance browser-based analytics

• Experience building or extending Web Components / Custom Elements and Shadow DOM styling

• Familiarity with the D3.js ecosystem (particularly D3FC) for custom financial chart rendering