Freelance Fullstack Engineers in Los AngelesFreelance Fullstack Engineers in Los Angeles
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Aurelien GERIER's avatar
Aurelien GERIER
proLos Angeles, USA
Fullstack Engineer | 14+ yrs Shipping React,Next.js,Node,AI
$50k+
Earned
6x
Hired
4.9
Rating
121
Followers
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Fullstack Engineer | 14+ yrs Shipping React,Next.js,Node,AI
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
1
442
Cover image for Breakjobs.ai
Breakjobs.ai
2
72
Cover image for WhatsApp & RCS Integrated Platform for ParaVet.live
WhatsApp & RCS Integrated Platform for ParaVet.live
1
47
Cover image for Scalable Digital Platform for Cognitive Testing
Scalable Digital Platform for Cognitive Testing
0
37
Fullstack Engineer(13)
Johnny Ha's avatar
Johnny Ha
Alhambra, USA
Senior Full-Stack Engineer | Web Development | AI Automation
$5k+
Earned
1x
Hired
5.0
Rating
19
Followers
Senior Full-Stack Engineer | Web Development | AI Automation
Cover image for Evoke - Project completed successfully
Evoke - Project completed successfully and got ⭐⭐⭐⭐⭐ review🚀 Overview EVOKE is a mindfulness-focused digital experience designed to create a calm, distraction-free space for reflection and presence. Problem Most digital platforms are built for speed and engagement, which can feel overwhelming. The goal was to design a space that encourages stillness instead of stimulation. Approach I focused on creating a minimal and immersive interface using soft visuals, intentional spacing, and slow interactions to guide users into a reflective state. Solution Designed a clean, distraction-free UI Built immersive entry and reflection flows Used calming imagery and typography to shape the experience Developed smooth transitions to support a sense of presence Tech & Tools Web development, frontend engineering, UX/UI design Outcome The final product delivers a unique digital experience that prioritizes calmness and intentional interaction, standing out from traditional high-stimulation platforms. 👉 https://www.evoke-space.com/
1
2
171
Cover image for EVOKE - Mindfulness & Reflection Web Experience
$6K+ earned
EVOKE - Mindfulness & Reflection Web Experience
4
21
Cover image for Luxury Jewelry E-Commerce Website – Gemsparx Front-End & Ful...
Luxury Jewelry E-Commerce Website – Gemsparx Front-End & Full-Stack Developer (React & Node.js) Gemsparx is a luxury jewelry marketing and e-commerce website designed to showcase diamonds, fine jewelry, and custom design services with a high-end user experience. I developed this project using React for a fast, responsive front end and Node.js for backend functionality. The focus was on creating a visually elegant, conversion-friendly interface while maintaining performance, scalability, and clean code architecture. The website features structured product categories, promotional sections, custom design workflows, and a modern UI optimized for both desktop and mobile users. This project demonstrates my ability to build premium marketing websites that align with luxury brand aesthetics and business goals.
5
23
444
Cover image for MSPTerms – SaaS Platform for Document Management & MSP Opera...
MSPTerms – SaaS Platform for Document Management & MSP Operations http://mspterms.com/ I developed a scalable SaaS web application for MSPTerms, a document management and business strategy platform designed for managed service providers (MSPs). The project involved building a fast, secure, and intuitive user interface using Nuxt.js, including authentication flows, dashboard layouts, and responsive landing pages. I focused on performance optimization, clean UI/UX, and seamless user experience across devices. The result is a modern, production-ready SaaS platform that enables MSPs to manage documents, streamline operations, and support business growth with a professional, easy-to-use system.
4
14
328
Fullstack Engineer(8)
Raphael McDonnell's avatar
Raphael McDonnell
proSanta Monica, USA
UX/UI Designer Specializing in Mobile Apps & SaaS Dashboards
UX/UI Designer Specializing in Mobile Apps & SaaS Dashboards
Cover image for AVID: Carbon Investing
AVID: Carbon Investing
1
10
Cover image for On-Demand Health and Wellness Mobile App
On-Demand Health and Wellness Mobile App
0
12
Cover image for Dental Practice Automation System
Dental Practice Automation System
1
12
Cover image for Mafia III Game Release Website For 2K
Mafia III Game Release Website For 2K
0
12
Fullstack Engineer(2)
Yonatan Tesfaye's avatar
Yonatan Tesfaye
proLos Angeles, USA
AI Automation Engineer | n8n, Agents & Integrations
New to Contra
AI Automation Engineer | n8n, Agents & Integrations
Cover image for Nova4AI Command Center Most AI agent
Nova4AI Command Center Most AI agent products give you one assistant and a text box. Nova4AI gives you a fleet you can watch work. Ten specialists run as a team a Researcher, a Coder, a Designer, a QA reviewer, an Archivist, a Prospector, an Optimizer with Navi orchestrating: routing tasks, running standups, pulling teammates into threads with an @mention. Every agent takes voice input. The core of the build is the Live Feed. Agent-to-agent handoffs stream in real time, each carrying a task ID, trace ID, source system, and timestamp. When Kenzo passes work to Relay, you see the message and can follow the trace. Multi-agent systems usually fail silently and invisibly; this one is auditable by default. Around the fleet sits the actual business surface: CRM and lead pipeline, proposals, performance analytics, projects, a shared memory layer, docs, and a skills registry. Agents write real artifacts to real endpoints and integrate outward through MCP and n8n. At the time of this screenshot: 10,983 activities in a day, 5,017 feed messages, 110 tasks open and 42 closed. Built so you can hand work to a team and still know exactly what happened.
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56
Cover image for Fundory — Grant Intelligence for
Fundory — Grant Intelligence for Nonprofits Grant funding runs on a brutal arithmetic: most applications fail, and the ones that fail still cost weeks of a small team's time. Nonprofits with two or three staff are spending that time writing into opportunities they were never positioned to win. Fundory attacks the problem upstream. Instead of helping organizations write faster, it decides what's worth writing at all. Every discovered grant is screened against the organization's actual profile and returned with a fit score, so a 65% never consumes the effort a 91% deserves. The product states its threshold plainly: apply above 85%. The pipeline runs Discovered → Screened → Waiting for Approval → Drafted → Closed, with AI moving work forward and humans holding the approval gate. Drafted proposals carry two separate scores — model confidence and draft quality — because those measure different risks and collapsing them would hide the one that matters. I built the screening and scoring layer, the document and narrative system that grounds drafts in the organization's real history, and the pipeline that keeps 28 live opportunities legible to a team without a grants department. Honest signal over generated volume.
2
101
Cover image for Bench — AI Agents for
Bench — AI Agents for Small Teams Solo founders don't lack AI tools. They lack the people who would use them. Most products hand you a blank text box and quietly make you the operator so the inbox still doesn't get triaged and the content calendar still doesn't get built. Bench inverts that. Instead of a chat interface, it's a hiring interface. You staff a bench of role-trained specialists — an Executive Assistant, a Lead Generator, a Social Media Manager, a Marketing Manager — each scoped to real responsibilities with its own tool access and definition of done. They work in the background and report status: working, done, needs review. I built the agent orchestration behind it, the role definitions that keep each specialist in its lane, and the review layer that surfaces anything consequential before it ships. Drafts land in the founder's voice. Nothing gets sent without a human seeing it first. The design constraint throughout was trust. Multi-agent systems fail when they act confidently in the wrong direction, so the product is architected around visible work and cheap correction rather than silent autonomy. Built for the smallest teams to deploy what used to require a payroll.
1
77
Cover image for An n8n pipeline that monitors
An n8n pipeline that monitors prospect social accounts, decides what's worth responding to, drafts on-brand comments with Claude, and posts them through a real browser session with human review built in.
0
74
Fullstack Engineer(3)
Daniel Walasinski's avatar
Daniel Walasinski
Los Angeles, USA
Full-stack dev of 5 web-apps with UX & marketing expertise
Full-stack dev of 5 web-apps with UX & marketing expertise
Cover image for Web App Directory Development for WalasinskiApps
Web App Directory Development for WalasinskiApps
0
5
Cover image for Development of VocabularyBuilder.org
Development of VocabularyBuilder.org
0
10
Cover image for qrCodeLab.net: Customizable QR Code Generator
qrCodeLab.net: Customizable QR Code Generator
0
8
Cover image for Development of ClassroomTimer.net for Educators
Development of ClassroomTimer.net for Educators
0
7
Fullstack Engineer(2)
Doug Wood's avatar
Doug Wood
Los Angeles, USA
Custom software dev for high-traffic applications
Custom software dev for high-traffic applications
Cover image for Outsourced Chief Investment Officer Due Diligence Platform
Outsourced Chief Investment Officer Due Diligence Platform
0
21
Cover image for Bot Butcher: context aware website spam filter for developers
Bot Butcher: context aware website spam filter for developers
0
30
Cover image for Test & Go Vending Machines
Test & Go Vending Machines
0
39
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Fullstack Engineer(2)