[Hiring] Senior Software Engineer II - Ads Manager @Instacart

Role Description

As a Senior II Frontend Engineer (L6) on the Ads Manager team, you will own the team’s frontend technical direction and lead large, multi-quarter initiatives that shape how advertisers plan, launch, and optimize campaigns on Instacart.

• Define key architectural patterns, improve developer productivity and observability.
• Act as a primary technical partner to product, design, data science, and backend teams.
• Lead the technical roadmap and architecture for Ads Manager’s web applications, balancing near-term delivery with long-term scalability and extensibility.
• Design, build, and maintain high-quality React UIs for campaign creation, management, reporting, and optimization.
• Define and evolve shared components, state management, and abstractions that make the surface easier to extend and maintain.
• Partner with backend teams on API and data contracts that enable robust, observable, and cost-efficient systems.
• Collaborate with other frontend leads and peers across the company to build alignment on frontend standards and best practices.
• Champion observability, performance, and reliability for Ads Manager, including metrics, logging, tracing, and on-call readiness for critical flows.
• Proactively drive modernization and technical debt paydown, including migrations and refactors of legacy frontend code.
• Embed security-by-design into frontend architecture and lead response for significant security or reliability issues touching Ads Manager UI.
• Propose and lead team-wide and cross-team initiatives on behalf of the EM, aligning stakeholders and driving execution across Ads and partner teams.
• Actively work with designers to build a best-in-class experience for users.
• Mentor and sponsor engineers up to L5, improve onboarding and team practices, and help resolve cross-team execution issues.
• Help define how the team uses AI-assisted development tools (for code, tests, and refactors), including patterns and best practices.

Qualifications

• 8+ years of experience building modern web applications, with substantial ownership of complex, user-facing products.
• Deep expertise in Node.js and React (hooks, state management, performance tuning) in large codebases.
• Strong skills in frontend architecture: modularization, shared components, routing, data fetching, and error handling.
• Experience designing and integrating with REST and/or GraphQL APIs, working closely with backend teams.
• Proven track record leading large, ambiguous, multi-stakeholder projects from design through rollout and operations.
• Demonstrated impact on team productivity and code health through abstractions, tooling, testing, and CI improvements.
• Experience with monitoring and observability for web apps (e.g., Datadog or similar).
• Comfortable using AI-assisted developer tools in day-to-day work and interested in scaling their use across the team.
• Excellent communication and collaboration skills with engineers, PMs, designers, and other partners.

Requirements

• Experience leading large-scale, data-heavy UIs such as analytics dashboards, editors, or complex workflows.
• Hands-on experience with GraphQL at scale (schemas, client patterns, performance).
• Experience with automation testing frameworks such as Selenium, Cypress, or Playwright.
• Deep experience with frontend performance and reliability (bundle optimization, code-splitting, resiliency patterns).
• Led modernization efforts or major migrations (framework upgrades, design system adoption, legacy deprecation).
• Experience with common design tools such as Figma.
• Track record mentoring L3–L5 engineers and acting as a go-to expert for a domain or surface area.

Benefits

• Highly market-competitive compensation and benefits.
• Remote work flexibility.
• New hire equity grant and annual refresh grants.