Frontend Developer - Retainer for VC/YC startups by Denny PortilloFrontend Developer - Retainer for VC/YC startups by Denny Portillo
Frontend Developer - Retainer for VC/YC startupsDenny Portillo
Cover image for Frontend Developer - Retainer for VC/YC startups

Let's build and ship consistently.

With my monthly retainer, you get a senior frontend engineer who understands real-time systems, product iteration, and scalable architecture. I help teams ship features, integrate complex backend services, and improve performance without breaking structure.
From enterprise platforms (Scotiabank, Walmart) to Web3 dashboards and validator monitoring systems, I bring execution speed with production-level standards.

How it works

Flexible Monthly Hours Predefined hours you can allocate to features, refactors, experiments, or support.
Priority Execution Your roadmap gets scheduled capacity and faster turnaround.
Deep Product Context I work closely with product and backend teams to align UI behavior with business logic.
Monthly Reporting Clear summary of shipped features, technical improvements, and next priorities.

What's Included

1. Feature Development & Maintenance

Dashboards / Internal tools
Onboarding flows / Product features
Web/Mobile UI (Next.js / React / React Native)
Refactors / structured improvements

2. Backend & API Integration

REST / GraphQL integration
WebSockets / Real-time data
Auth / Payments / Smart Contracts
Data pipelines / Caching

3) UI/UX Implementation & Performance

Pixel-perfect UI from design
Design system implementation
Performance optimization (Core Web Vitals)
State management and scalability cleanup
FAQs

Starting at$5,000 /mo
Tags
Next.js
Node.js
React
Tailwind CSS
TypeScript
Vercel
Frontend Engineer
Web Developer
Cryptocurrency & Blockchain
Service provided by
Denny Portillo San Salvador, El Salvador
8
Followers
Frontend Developer - Retainer for VC/YC startupsDenny Portillo
Starting at$5,000 /mo
Tags
Next.js
Node.js
React
Tailwind CSS
TypeScript
Vercel
Frontend Engineer
Web Developer
Cryptocurrency & Blockchain
Cover image for Frontend Developer - Retainer for VC/YC startups

Let's build and ship consistently.

With my monthly retainer, you get a senior frontend engineer who understands real-time systems, product iteration, and scalable architecture. I help teams ship features, integrate complex backend services, and improve performance without breaking structure.
From enterprise platforms (Scotiabank, Walmart) to Web3 dashboards and validator monitoring systems, I bring execution speed with production-level standards.

How it works

Flexible Monthly Hours Predefined hours you can allocate to features, refactors, experiments, or support.
Priority Execution Your roadmap gets scheduled capacity and faster turnaround.
Deep Product Context I work closely with product and backend teams to align UI behavior with business logic.
Monthly Reporting Clear summary of shipped features, technical improvements, and next priorities.

What's Included

1. Feature Development & Maintenance

Dashboards / Internal tools
Onboarding flows / Product features
Web/Mobile UI (Next.js / React / React Native)
Refactors / structured improvements

2. Backend & API Integration

REST / GraphQL integration
WebSockets / Real-time data
Auth / Payments / Smart Contracts
Data pipelines / Caching

3) UI/UX Implementation & Performance

Pixel-perfect UI from design
Design system implementation
Performance optimization (Core Web Vitals)
State management and scalability cleanup
FAQs

$5,000 /mo