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Founded in 2012, Instacart offers on-demand food and grocery delivery across the United States. Named the #1 Most Promising Company in America by Forbes magazine, flexible Instacar
Senior Software Engineer II, Page Builder – Retailer Platform
Location
Canada
Posted
63 days ago
Salary
$196K - $207K / year
Seniority
Senior
Job Description
Senior Software Engineer II, Page Builder – Retailer Platform
Instacart
• Lead the CMD service extraction: architect and drive the migration of our Content Management Domain from a Ruby monolith into a dedicated Go service using a strangler-pattern approach; design proto-first API contracts (e.g., v2/GetPlacements), implement concurrent visibility condition evaluation via goroutines, and establish formal SLOs (99.9% availability, under 30ms P90 placement fetch) for a system handling 7M daily requests across 15+ consumer surfaces. • Design composable extensibility: replace 125+ hardcoded placement format types with a single composable type built on React components and Liquid templates to eliminate weeks of full-stack engineering per new format and unlock enterprise retailer customization at scale. • Shape the AI-native content platform: expose Page Builder capabilities as MCP-compatible endpoints, enabling AI agents to create, preview, QA, and publish pages end-to-end; define how LLM-powered content creation, AI carousels, and agentic page management integrate with CMD. • Drive cross-team architecture: own the technical relationship with Shopping/URSA, Feeds, Growth, Loyalty, and Ads; lead API contract design, coordinate migration sequencing, and ensure CMD evolves as a reliable, well-documented platform that other teams can confidently build on. • Mentor and multiply the team: raise the engineering bar across Page Builder by mentoring engineers, establishing robust design patterns, and contributing to a culture where AI-assisted development is the default.
Job Requirements
- 5+ years of professional software engineering experience.
- Strong backend engineering skills with production experience in Go, Ruby, Java, or similar systems-level languages.
- Proven track record designing and leading large-scale technical projects (e.g., service extractions, platform migrations, new system architectures consumed by multiple teams).
- Experience building and operating high-throughput, low-latency backend services (handling millions of daily requests, sub-100ms latency targets, formal SLOs).
- Experience with platform-focused API design (gRPC/Protobuf, GraphQL, or REST) consumed by downstream teams.
- Demonstrated ability to drive technical decisions across team boundaries, including leading design reviews, negotiating API contracts, and coordinating migrations.
- Experience mentoring engineers and elevating team-wide technical standards.
- Strong written and verbal communication skills, including authorship of technical design docs and presenting architecture to leadership and cross-functional partners.
Benefits
- Highly market-competitive compensation and benefits
- New hire equity grant
- Annual refresh grants
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