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 Sarah Jane Dias

Sarah Jane Dias

1

87

Cover image for Handshake - Marketing Platform & Web Properties

Handshake - Marketing Platform & Web Properties

2

78

Cover image for 28Kothi - Boutique Luxury Hotel

28Kothi - Boutique Luxury Hotel

2

71

Cover image for sparkspace.ai + website

sparkspace.ai + website

1

33

Frontend Engineer(4)

Aurelien GERIER

proLos Angeles, USA

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

$50k+: Earned

5x: Hired

4.9: Rating

89: 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

27

Cover image for HumanData Web Application

HumanData Web Application

0

28

Cover image for Braidio

1

52

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

130

Frontend Engineer(3)

Christine Straub

Full-Stack AI/ML Software Engineer

$50k+: Earned

1x: Hired

5.0: Rating

63: 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

41

Cover image for RAG with AWS Bedrock and

RAG with AWS Bedrock and React

1

345

Cover image for Software Engineer with AI/ML experience

$71K+ earned

Software Engineer with AI/ML experience

2

3

168

Cover image for Creative intelligence & optimisation platform | Dragonfly AI

Creative intelligence & optimisation platform | Dragonfly AI

0

282

Frontend Engineer(1)

Matt Kettelkamp

San Francisco, USA

Web Developer | 3D Developer

49: Followers

Top

Web Developer | 3D Developer

Cover image for Fullstack Web App

Fullstack Web App

3

57

Cover image for 3D Interactive Footer

3D Interactive Footer

0

7

Cover image for Opti - 3D ECG Visualization Education Tool

Opti - 3D ECG Visualization Education Tool

10

142

Cover image for 3D Event Promo

2

22

Frontend Engineer(1)

Anush | Foundrline

100+ websites & products built and launched in 3–5 weeks.

$100k+: Earned

50x: Hired

4.9: Rating

542: Followers

expert

expert

+9

100+ websites & products built and launched in 3–5 weeks.

Cover image for Travel Business Website | Web Dev + Custom Component

Travel Business Website | Web Dev + Custom Component

2

66

Cover image for Home Renovation Matchmaking Platform | Web Dev (React + Nodejs)

Home Renovation Matchmaking Platform | Web Dev (React + Nodejs)

1

13

Cover image for IT Services & Consulting | Web Design + Dev

IT Services & Consulting | Web Design + Dev

0

14

Cover image for AI-Powered Phone & Caregiver Dashboard for Safer Senior Living

AI-Powered Phone & Caregiver Dashboard for Safer Senior Living

5

213

Frontend Engineer(3)

proSan Francisco, USA

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

$10k+: Earned

14x: Hired

5.0: Rating

219: Followers

Top

expert

+2

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

Cover image for ❖ Optiwatt - Figma to Framer ❖

❖ Optiwatt - Figma to Framer ❖

3

449

Cover image for CLIPI Historical Archive — Framer D&D

$4.3K+ earned

CLIPI Historical Archive — Framer D&D

1

51

Cover image for ❖ TWYNE - Framer Website ❖

❖ TWYNE - Framer Website ❖

37

1.6K

Cover image for ❖ TEDxBoulder - Framer Site ❖

❖ TEDxBoulder - Framer Site ❖

11

419

Frontend Engineer(1)

proSan Francisco, USA

AI Campaign Assets + Agents for DTC Growth

$50k+: Earned

19x: Hired

5.0: Rating

190: 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

96

Cover image for GavelGab Law Chatbot

GavelGab Law Chatbot

1

156

Cover image for Crypto Luminary Web App

Crypto Luminary Web App

0

85

Cover image for GreenOurPlanet Chatbot

GreenOurPlanet Chatbot

0

106

Frontend Engineer(4)

Scotty Waggoner

maxOrangevale, USA

Senior TypeScript backend, web, and mobile developer

$10k+: Earned

1x: Hired

6: Followers

Senior TypeScript backend, web, and mobile developer

Cover image for AirPay

0

1

Cover image for Educate to Space

Educate to Space

0

12

Cover image for Ask AI for Foodnoms

Ask AI for Foodnoms

1

20

Cover image for Health Insurance Marketing and Quoting Responsive Website

Health Insurance Marketing and Quoting Responsive Website

0

12

Frontend Engineer(2)