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 possibleAs 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 responsibilitiesDrives roadmap decisions on the C++/Rust WebAssembly engine, Apache Arrow integration, custom element viewer plugins (datagrid, D3FC charting), and client/server WASM initialization pipelineExecutes creative software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or break down technical problemsHelps 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 layerDevelops and extends the Sigma Data Adapters library - a suite of TypeScript adapters ( Hydra, AMPS, KDB, WebSocket, SCX, Udex, and others) that stream data from internal JPMC APIs into Perspective TablesDevelops secure high-quality production code, and reviews and debugs code written by othersDrives WebAssembly performance tuning and ensures efficient data serialization via Apache Arrow across browser and server contextsIdentifies opportunities to eliminate or automate remediation of recurring issues to improve overall operational stability of software applications and systemsLeads 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 architectureLeads communities of practice across Software Engineering to drive awareness and use of new and leading-edge technologiesAdds to team culture of diversity, opportunity, inclusion, and respectRequired qualifications, capabilities, and skillsAt least 10 years of relevant experience in software engineeringHands-on practical experience delivering system design, application development, testing, and operational stabilityAdvanced 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 esbuildProficiency in automation and continuous delivery methods (Jenkins, SonarQube, code-coverage gating)Proficient in all aspects of the Software Development Life CycleAdvanced understanding of agile methodologies such as CI/CD, Application Resiliency, and SecurityExperience 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 storesIn-depth knowledge of the financial services industry and their IT systemsPractical cloud native experience (Gaia Cloud or comparable PaaS)Preferred qualifications, capabilities, and skillsDirect experience with FINOS Perspective - its viewer API, plugin system, table/view lifecycle, and data-binding modelWorking 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 analyticsExperience building or extending Web Components / Custom Elements and Shadow DOM styling Familiarity with the D3.js ecosystem (particularly D3FC) for custom financial chart rendering JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. 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.JPMorgan Chase & Co. is an Equal Opportunity Employer, including Disability/VeteransJ.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. Full timePosting Date: 2026-06-10