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About the Role

Pinterest is seeking a passionate, inquisitive, and well-rounded Sr. Staff Backend Engineer to join the Pinterest Assistant team. This role will define the architecture and technical direction for a visual-first, AI-powered companion that helps Pinners go from inspiration to action across shopping, search, and discovery. You will drive foundational investments across orchestration, memory, personalization, context management, tool integrations, APIs, and platform infrastructure, enabling the next generation of AI experiences.

Responsibilities

Define and drive the technical vision and architecture for the backend systems powering Pinterest Assistant, ensuring they scale reliably.
Lead the design and implementation of the core Assistant platform including orchestration, memory and personalization, context management, APIs, tool integrations, and backend infrastructure.
Drive technical strategy, identifying foundational platform investments that unlock new Assistant capabilities while improving developer velocity, reliability, and scalability.
Partner closely with Product, Design, Frontend engineers, ML engineers, and Infrastructure teams to build a deeply personalized, multimodal conversational experience.
Shape the architecture for AI-powered applications, including retrieval, context assembly, tool execution, memory, and model orchestration, in partnership with ML teams.
Establish engineering best practices for production LLM and agent systems, including observability, logging, evals, safety mechanisms, rollout strategies, and incident response.
Mentor engineers, raising the technical bar through architecture reviews, technical guidance, and thoughtful engineering leadership.
Navigate ambiguity and make pragmatic architectural decisions that balance rapid product iteration with long-term maintainability.
Influence technical direction beyond the immediate team by collaborating across teams and helping shape Pinterest’s broader AI platform strategy.
Stay current with advances in LLMs, agentic systems, and backend platform design, and apply them pragmatically to consumer product development.

Requirements

Bachelor’s degree in a relevant field such as computer science or equivalent experience
10+ years of backend software engineering experience, including significant experience leading large, ambiguous systems that power consumer experience as a senior IC.
3+ years operating as a technical lead, driving the architecture and development of large-scale distributed backend systems.
Strong backend engineering experience in Python, TypeScript, Node or similar languages and ecosystems.
Experience building platforms or foundational infrastructure that enables product teams to move faster.
Strong understanding of modern model-driven systems and experience partnering closely with machine learning engineers on AI-powered products.
Strong leadership, communication, and cross-functional collaboration skills
Familiarity with concepts such as retrieval, ranking, personalization, inference, context management, or orchestration, with ability to collaborate effectively on technical design.
Track record of mentoring senior engineers and elevating engineering quality across an organization
Product-minded and execution-oriented, with the ability to lead in ambiguity and move fluidly between strategy and hands-on implementation
A strong builder’s mindset: you know how to create momentum in ambiguous spaces, make pragmatic early decisions, and lay the technical foundation for systems that will grow in scale, complexity, and impact over time.
Experience building AI-powered or LLM-based products at scale
Experience designing systems for conversational AI, agents, tool calling, or multimodal experiences.
Experience with retrieval, ranking, recommendation, search, or personalization systems.
Familiarity with embeddings, retrieval-augmented generation (RAG), context management, or memory architecture.
Experience partnering with Applied Scientists or Machine Learning engineers to bring ML capabilities into production.
Familiarity with evaluation frameworks, experimentation, and quality frameworks for AI products.
Full-stack development experience

Skills

Python
TypeScript
Node
AI
LLMs
Agentic systems
Backend platform design
Retrieval
Ranking
Personalization
Inference
Context management
Orchestration
Conversational AI
Tool calling
Multimodal experiences
Embeddings
Retrieval-augmented generation (RAG)
Memory architecture
Evaluation frameworks
Experimentation
Quality frameworks for AI products

Location

Anywhere in the country

Work Type

Hybrid

Experience Level

Sr. Staff
10+ years of backend software engineering experience
3+ years operating as a technical lead

Education Level

Bachelor’s degree in a relevant field such as computer science or equivalent experience

Salary/Compensations

$208,592—$429,454 USD

Benefits

Eligible for equity

About the Company

Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime.
At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product.
Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work.
At Pinterest, AI isn't just a feature, it's a powerful partner that augments our creativity and amplifies our impact, and we’re looking for candidates who are excited to be a part of that.
Through our interview process, what matters most is that you can always explain your approach, showing us not just what you know, but how you think.
Millions of people across the world come to Pinterest to find new ideas every day.
It’s where they get inspiration, dream about new possibilities and plan for what matters most.
Our mission is to help those people find their inspiration and create a life they love.
In your role, you’ll be challenged to take on work that upholds this mission and pushes Pinterest forward.
You’ll grow as a person and leader in your field, all the while helping Pinners make their lives better in the positive corner of the internet.

Equal Opportunity

Pinterest is an equal opportunity employer and makes employment decisions on the basis of merit.
We want to have the best qualified people in every job.
All qualified applicants will receive consideration for employment without regard to race, color, ancestry, national origin, religion or religious creed, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, age, marital status, status as a protected veteran, physical or mental disability, medical condition, genetic information or characteristics (or those of a family member) or any other consideration made unlawful by applicable federal, state or local laws.
We also consider qualified applicants regardless of criminal histories, consistent with legal requirements.
If you require a medical or religious accommodation during the job application process, please complete this form for support.