I will connect and integrate apis for your website or app

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lenny_tech22
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lenny_tech22
Lenny K

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

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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