Serkan Yersen

Lead Software Engineer - Frontend Architecture & Developer Infrastructure
Email: serkanyersen@gmail.com • Website: serkan.dev • Location: Bay Area, CA

SUMMARY

Senior Software Engineer with 19+ years of experience and most recently 6 years at Meta working across WhatsApp Web, WhatsApp Mobile Infrastructure, release engineering, and agentic AI developer workflows. Deep expertise in JavaScript/TypeScript, large-scale frontend architecture, build systems, release automation, and developer experience tooling. Led teams delivering highly reliable release systems powering WhatsApp for 3+ billion users across all platforms. Results-driven engineer with a strong focus on performance, stability, and tooling that massively amplifies developer velocity.

EXPERIENCE

Meta (Facebook / Meta Platforms) - Staff Software Engineer

Sept 2019 – Present | Menlo Park, CA

WhatsApp Web – Frontend Architecture & Desktop Apps

Architected core components of WhatsApp Web, including performance-critical UI systems and long-term frontend infra used by millions daily.
Built and maintained foundational tooling for the web client (Webpack/Babel/ESLint/PostCSS customizations, build performance improvements, bundling strategies).
Co-developed and shipped WhatsApp Desktop (Electron), owning desktop-specific integration points and build distribution workflows.
Drove modernization of the codebase toward monorepo and stricter architectural boundaries.

WhatsApp Mobile Infra – Release Infrastructure & Developer Tooling

Led the engineering effort for WhatsApp’s release infrastructure, supporting Android, iOS, Web, and Desktop.
Owned reliability, automation, and scalability of systems responsible for delivering WhatsApp to 3B+ users worldwide.
Designed and implemented advanced internal tools including:
- Release Hub (central release management)
- On-Demand Dev Environments
- Release Data Architecture
- Developed APIs and Automations for code delivery workflows.
- CI/CD code reliability tooling (internal Meta infra)
Led a team of developers to ship resilient, high-automation pipelines reducing human error and drastically shortening release turnaround times.
Partnered with cross-functional teams (mobile clients, backend, QA, security) to unify release practices across multiple platforms.

Agentic AI Developer Flows - WhatsApp

2024–Present

Building agentic AI workflows that assist developers in understanding, modifying, debugging, and shipping features across WhatsApp’s massive codebases.
Designing systems enabling LLM-powered code navigation, release awareness, and scheduling.
Focused on bridging developer tools, AI orchestration, and WhatsApp’s complex distributed architecture.
Collaborating with Meta AI teams to operationalize agentic capabilities for real engineering use cases at scale.

EARLIER EXPERIENCE

TechShed / RedBeacon (Acquired by Home Depot) - Frontend Architect

2013 – 2019

Worked as tech lead on companies various frontend applications, focused on scalability, reliability and delivery for Homedepot’s many online workflows.
Build various developer tooling and APIs for productivity.
Formed and mentored a strong frontend team capable of delivering high quality applications in a short amount of time.

JotForm.com - Founding Engineer

2006 – 2013

Built Jotform’s first of its kind Drag&Drop WHYSIWYG form builder.
Built core frontend and backend architecture used across millions of form submissions daily.
Developed internal libraries, tools, and infrastructure that accelerated company-wide development.

TECHNICAL SKILLS

Languages & Core:
JavaScript (ESNext), TypeScript, Flow, HTML, CSS, SQL, GraphQL

Frontend Architecture:
React, Redux, Webpack, Babel, Electron, build systems, design systems, performance optimization

Backend & Infra:
Node.js, Express, microservices, CI/CD systems, containerized workflows, internal Meta infra, distributed pipelines

Tooling & Developer Experience:
Custom linting/transforms, code mods, static analysis, CLI tooling, dev-workflow automation, release pipelines

AI / LLM Work:
Agentic workflows, developer-tool integration, code intelligence, in-context orchestration

PROJECT HIGHLIGHTS (Meta)

WhatsApp Release Hub - Unified release coordination platform across Android/iOS/Web/Desktop. Reduced release friction and improved stability.
WAJS On-Demand Dev Environments - Provided instant testing environments, cutting dev iteration time.
AI Powered Knowledge and Productivity tools - Helps developers navigate highly complex release infrastructure, schedule releases, hotfixes and product launches.
WhatsApp Desktop Architecture - Key contributions to the Electron-based desktop client.
Meta-wide Dev Infra Integrations - Improved reliability and visibility across internal CI systems used by hundreds of engineers.

EDUCATION

2005 Bilkent University - Computer Technologies & Programming