I will connect and integrate apis for your website or app

L
lenny_tech22
L
lenny_tech22
Lenny K
connect and integrate apis for your website or app
Full Screen
connect and integrate apis for your website or app
Full Screen
connect and integrate apis for your website or appconnect and integrate apis for your website or app

About this gig

Struggling with broken integrations, slow apps, or ideas stuck in sketches? I build fast, scalable, revenue driving web applications that actually work and win users.

With 5+ years as a full-stack developer, I've shipped 20+ production projects for startups and growing businesses. Master of the modern stack: React/Next.js/TypeScript (frontend), Node.js/Express (backend), MongoDB/PostgreSQL/MySQL, and seamless third-party API connections.

What you get when you hire me:

  1. Custom responsive web apps & SaaS tools (React, Next.js 14, TypeScript)
  2. Robust, secure backends with REST/GraphQL APIs
  3. Expert API integrations: Stripe (payments/subscriptions), OpenAI/Gemini (AI features), Twilio (SMS/voice), Google Maps, SendGrid, Auth0/Firebase, AWS S3/SES, webhooks & real-time (WebSockets)
  4. Full authentication, security (JWT/OAuth), rate limiting & best practices
  5. Performance optimization, clean code, SEO-friendly structure
  6. Deployment on Vercel/AWS with CI/CD basics
  7. Admin dashboards, real-time features & post-launch support

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases

  • Programming language

    • JavaScript

  • Frontend framework

    • Next.js
    • Nuxt.js
    • React.js
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • Laravel
    • FastAPI
    • NestJS
    • Next.js
    • Node.js

Get to know Lenny K

Lenny K

Turning ideas into full apps

  • FromUnited States
  • Member sinceMar 2026
  • Avg. response time1 hour

  • Languages

    English
Full-stack developer with 5+ years of hands on experience building scalable, user centric web applications from concept to deployment. Expert in modern JavaScript ecosystems: React/Next js for responsive frontends, Node js/Express for robust backends, and databases like MongoDB, PostgreSQL, and MySQL. I craft seamless end-to-end solutions that drive real business impact.

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