Vetted Frontend Developers in California

“Frontend/platform engineer with unusually strong depth in real-time data systems, observability, and API architecture across Adobe, Macy's/Bloomingdale's, and ASU. They’ve owned high-scale product surfaces end-to-end, from secure GraphQL/REST and WebSocket design through deployment, while also driving platform-wide standards adopted across 8+ product surfaces and 6 teams.”

Thomas Toan

Screened

Senior Frontend Software Engineer specializing in regulated and high-performance web applications

San Mateo, CA11y exp

“Frontend/product engineer who has owned high-impact surfaces across video streaming, edtech analytics, and regulated healthcare platforms. Notable work includes rebuilding a clinical trial forms system with strict TypeScript standards, designing real-time livestream engagement features, and shipping a lightweight PIP player that improved Core Web Vitals by avoiding heavy SDK load on initial page render.”

“Frontend engineer with strong ownership of revenue-critical checkout experiences, including cart, payment, and confirmation flows used across four subscription programs. Stands out for combining architecture, performance optimization, and analytics-driven product thinking—improving load times by 20% and shipping Apple Pay and referral features tied to increased revenue.”

Janki Mehta

Screened

Senior Frontend React Developer specializing in scalable web applications

Fremont, CA10y exp

“Frontend-focused product engineer in healthcare who has owned patient/provider scheduling experiences end-to-end, from product requirements and API design through React implementation, deployment, and post-launch measurement. Particularly strong in real-time operational dashboards, performance optimization, and cross-functional work with backend and product teams on complex scheduling workflows.”

“Backend/data engineer focused on production-grade Python microservices and AWS platforms, including a hybrid Lambda + ECS Fargate architecture managed with Terraform and CI/CD. Has hands-on reliability experience (JWT/OAuth, timeouts, retries, centralized error classification) and built AWS Glue/PySpark ETL pipelines consolidating PostgreSQL/RDS, MongoDB, and S3 sources into curated partitioned Parquet datasets. Demonstrated measurable SQL tuning impact (8 minutes to 25 seconds) and disciplined legacy-to-modern migrations with parity validation and UAT sign-off.”

“Founding/solo engineer who rebuilt an early-stage product from the ground up: Ask NETA, an AI assistant for electricians to answer complex electrical code questions. Delivered a full-stack TypeScript system (React web + React Native iOS/Android, Express API, Postgres on AWS) with CI/CD, observability, and a Vertex AI RAG pipeline, reaching 3,000 MAUs in the first month; also built a real-time distributed scoring system handling unreliable hardware data with sequencing and retries.”

“Frontend/product engineer with strong ownership on complex, high-impact internal and government-facing products. Most notably built an intake data portal for a federal agency with dynamic form building, versioning, permissions, and migrations that exceeded adoption expectations by 300% and expanded to agency-wide use while reducing manual work by roughly a week per month.”

“Full-stack developer who has built and shipped both traditional web products and AI-powered applications, including a Spotify playlist-combining app, a recruiter-facing RAG chatbot embedded in a portfolio, and a fine-tuned GPT-2 art review generator. Stands out for combining privacy-conscious engineering, practical LLM guardrails, and scrappy production problem-solving—from queue-based inference systems to newsroom digital transformation with multi-tenant WordPress.”