Freelance Frontend Engineers in California

Freelance Frontend Engineers in CaliforniaFreelance Frontend Engineers in California

Projects People

proCalifornia, USA

Fast-tracking business growth with intuitive interfaces

$25k+: Earned

3x: Hired

5.0: Rating

23: Followers

Fast-tracking business growth with intuitive interfaces

Cover image for Handshake AI Help Center

Handshake AI Help Center

0

7

Cover image for OpenAI x Handshake Codex Creator Challenge

OpenAI x Handshake Codex Creator Challenge

0

4

Cover image for Handshake - AI Outlook Interactive Report

Handshake - AI Outlook Interactive Report

0

7

Cover image for sparkspace.ai + website

sparkspace.ai + website

1

36

Frontend Engineer(7)

Aurelien GERIER

proLos Angeles, USA

Fullstack Engineer | 14+ yrs Shipping React,Next.js,Node,AI

$50k+: Earned

5x: Hired

4.9: Rating

102: Followers

Top

Fullstack Engineer | 14+ yrs Shipping React,Next.js,Node,AI

Cover image for Scalable Digital Platform for Cognitive Testing

Scalable Digital Platform for Cognitive Testing

0

30

Cover image for HumanData Web Application

HumanData Web Application

0

33

Cover image for Braidio

1

54

Cover image for Led delivery of a cloud-native

Led delivery of a cloud-native K-12 student wellness platform that helps counselors monitor wellbeing, surface at-risk students, and act early—balancing product velocity with FERPA/COPPA-aware design and multi-tenant isolation (API RBAC, PostgreSQL RLS, district-scoped analytics). → Owned technical direction and delivery rhythm across a TypeScript monorepo (pnpm/Turbo): backend API, web app, shared packages, DB migrations, CI/CD gates, and staged deploys to GCP (e.g. Cloud Run), aligning engineering work with roadmap and release risk. → Orchestrated an AI assistant for counselors on Google Vertex AI (Gemini): system prompts, safety settings for K-12, function-calling tool design, multi-round tool loops, and strict separation so UI widgets render from verified tool results—not model hallucinations—with tracing/feedback hooks (e.g. Langfuse) for quality and auditability. → Drove access-control and compliance posture for sensitive student data: role/permission middleware, tenant-scoped queries, and defense-in-depth database policies—documentation and evidence suitable for enterprise security reviews (e.g. SOC 2–style narratives). → Partnered on product and program management: phased feature rollout, PR/branch discipline, and clear ownership of scope vs. risk so pilot schools could onboard without compromising data boundaries. → Shaped integrations and platform boundaries: Firebase auth, Neon PostgreSQL + Drizzle ORM, real-time patterns, BigQuery analytics isolation, and operational practices (testing, lint, type-check) that keep the stack maintainable at scale. → Established a disciplined, AI-accelerated delivery model—not ad-hoc prompting: Cursor rules and Claude skills/agents for repeatable workflows; Husky + lint/type-check/test gates; GitHub Actions CI/CD; Cursor Cloud Agents for automated PR review; and daily monitoring of E2E, coverage, and critical issues—owning AI-orchestrated implementation while enforcing accuracy, consistency, and observability

0

286

Frontend Engineer(3)

Christine Straub

Full-Stack AI/ML Software Engineer

$50k+: Earned

1x: Hired

5.0: Rating

68: Followers

Full-Stack AI/ML Software Engineer

Cover image for Chatbot starter with GPT3, Twilio, and React

Chatbot starter with GPT3, Twilio, and React

0

47

Cover image for RAG with AWS Bedrock and

RAG with AWS Bedrock and React

1

499

Cover image for Software Engineer with AI/ML experience

$71K+ earned

Software Engineer with AI/ML experience

2

3

194

Cover image for Creative intelligence & optimisation platform | Dragonfly AI

Creative intelligence & optimisation platform | Dragonfly AI

0

289

Frontend Engineer(1)

Matt Kettelkamp

San Francisco, USA

Web Developer | 3D Developer

56: Followers

Top

Web Developer | 3D Developer

Cover image for Fullstack Web App

Fullstack Web App

3

61

Cover image for I built a custom analytics

I built a custom analytics platform to track usage on projects. We track page views, sources, sessions, bounce rate, custom events, and many more all with just adding a script to the layout of your application.

0

49

Cover image for 3D Interactive Footer

3D Interactive Footer

0

11

Cover image for Opti - 3D ECG Visualization Education Tool

Opti - 3D ECG Visualization Education Tool

11

183

Frontend Engineer(1)

proSan Francisco, USA

❖ Narrative-driven Framer sites for mission-focused brands ❖

$10k+: Earned

14x: Hired

5.0: Rating

233: Followers

Top

expert

+1

❖ Narrative-driven Framer sites for mission-focused brands ❖

Cover image for ❖ Optiwatt - Figma to Framer ❖

❖ Optiwatt - Figma to Framer ❖

3

452

Cover image for CLIPI Historical Archive — Framer D&D

$4.3K+ earned

CLIPI Historical Archive — Framer D&D

1

58

Cover image for ❖ TWYNE - Framer Website ❖

❖ TWYNE - Framer Website ❖

40

1.7K

Cover image for ❖ TEDxBoulder - Framer Site ❖

❖ TEDxBoulder - Framer Site ❖

11

427

Frontend Engineer(1)

proSan Francisco, USA

AI Campaign Assets + Agents for DTC Growth

$50k+: Earned

19x: Hired

5.0: Rating

206: Followers

Top

Partner

+1

AI Campaign Assets + Agents for DTC Growth

Cover image for AriaLeaf AI - AI Voice Agent Platform for Dispensaries

AriaLeaf AI - AI Voice Agent Platform for Dispensaries

1

105

Cover image for GreenOurPlanet Chatbot

GreenOurPlanet Chatbot

0

112

Cover image for GavelGab Law Chatbot

GavelGab Law Chatbot

1

160

Cover image for Crypto Luminary Web App

Crypto Luminary Web App

0

88

Frontend Engineer(4)

Scotty Waggoner

maxOrangevale, USA

Backend-leaning Full-stack & AI Engineer

$10k+: Earned

1x: Hired

6: Followers

Backend-leaning Full-stack & AI Engineer

Cover image for AirPay, a nearby payments app

AirPay, a nearby payments app

0

4

Cover image for Educate to Space

Educate to Space

0

13

Cover image for Ask AI for Foodnoms

Ask AI for Foodnoms

1

23

Cover image for Health Insurance Marketing and Quoting Responsive Website

Health Insurance Marketing and Quoting Responsive Website

0

13

Frontend Engineer(2)

proLos Angeles, USA

AI Product Manager & Technical Project Lead (CSM)

$5k+: Earned

1x: Hired

5.0: Rating

15: Followers

AI Product Manager & Technical Project Lead (CSM)

Cover image for Digital Marketing Projects at Kern Agency

Digital Marketing Projects at Kern Agency

0

4

Cover image for BeautyCon Website and Subscription Service Development

BeautyCon Website and Subscription Service Development

0

8

Cover image for Destiny’s Child’s Dynamic HTML/Flash Website for Final Album

Destiny’s Child’s Dynamic HTML/Flash Website for Final Album

0

15

Cover image for Beyonce - Hybrid HTML/Flash Website for Album Launch

Beyonce - Hybrid HTML/Flash Website for Album Launch

0

21

Frontend Engineer(8)