Shalini Sah · Engineering Leadership · AI, Mobile & Product Infrastructure

Engineering decisions that
move the business.

When architecture, execution, and revenue start depending on the same decision, I help make the system legible: what is working, what is dragging, and what needs to change. Engineering leadership for AI, mobile, and product infrastructure—from 0→1 products to systems serving billions. Former Staff Engineer / Engineering Manager at WhatsApp, with engineering across Instagram, Google, Meta, and Amazon.

For founders & leaders ↓ For companies ↓

What to reach out for

For leaders

High-Leverage Decisions & Thinking Partner

The highest-leverage decisions rarely come with a playbook. Whether you're shaping a system, leading a team, or deciding what's next in your career, a second perspective can change the outcome.

→ Career inflection pointsStaff, Principal, Engineering Manager, Head of Engineering, or your next chapter. Navigate high-impact career decisions with someone who's been on both the technical and leadership path.
→ Technical judgment on callA second read for architectural decisions, launch risk, platform direction, or AI adoption, aka when the cost of getting it wrong is measured in months or years.
→ Thinking partner for hard problemsBring me the problem that doesn't have an obvious answer. I enjoy working through difficult tradeoffs across engineering, product, organizations, and AI.

Graphite abstract engineering leadership visual

For companies

Hiring an engineering leader

I lead teams through ambiguous, high-stakes product and infrastructure bets: setting direction, aligning stakeholders, building execution systems, and creating the technical clarity that moves velocity, quality, and revenue.

→ VP / Head of EngineeringLead the team, own delivery, and stay technical. Engineering leadership on flagship products from 0-to-1 bets to billion-user scale, with attention to detail and big-picture judgment.
→ Architecture audit / code auditA focused review of system boundaries, mobile app architecture, reliability risks, privacy assumptions, and maintainability.
→ Technical due diligenceIndependent engineering diligence for founders, investors, and leadership teams evaluating product readiness, architecture risk, AI-native systems, or scaling constraints.

About

I work where product ambition, technical architecture, and business consequence meet. The problems I solve rarely start as code problems. They show up as decisions with long half-lives: platform bets, ownership boundaries, migrations, AI architecture, or execution systems that quietly slow the business.

Previously, I led messaging, privacy, and infrastructure work at WhatsApp at 2B-user scale, owned engineering and product leadership for Instagram Stories creation, and shipped consumer products at Google used by hundreds of millions of people.

Open to thoughtful LinkedIn DMs from visionaries, founders, and tech leaders working on consequential systems.

Where the judgment was forged

WhatsAppInstagramGoogleMetaAmazon

infra, privacy, and consumer messaging primitives at 2B-user scale.

Instagram

EM-PM work on Stories creation, driving engagement as a beloved feature became a platform.

Google → AI

consumer products used by hundreds of millions, with the same systems lens now applied to AI.

What I write about

// ai systems

AI-native architecture and development

Boundaries, tool permissions, threat models, and development workflows that make AI features legible before launch.

// engineering

Engineering Gems

Systems design, infrastructure instincts, API contracts, interface guarantees, and judgment calls that turn engineering taste into product leverage.

LinkedIn ↗

Reach out

Have a decision you
can't easily walk back?

Choose the lane that best fits your situation, and include a bit of context. If it feels aligned, I am happy to set up a coffee chat or whiteboarding session.