Henry Varona

Henry Varona

Caracas, Venezuela

Henry Varona

Senior Backend Engineer - Web3 & Fintech
Category : Web development
Are you looking for a bulletproof, scalable server-side solution for your platform? I am a Senior Backend Engineer with extensive experience designing and implementing robust backend infrastructures, cloud microservices, and secure financial integrations.

I help startups and established companies build high-throughput systems that run seamlessly, handle heavy data loads, and prevent critical failures.

What I can do for your project:
• Backend & API Development: Design and deployment of clean, maintainable RESTful and GraphQL APIs using cutting-edge backend frameworks.
• Architecture & Microservices: Migrating monolithic systems to scalable microservices, ensuring optimal communication and resource management.
• Database Management: Structuring and optimizing relational (SQL) and non-relational (NoSQL) databases for ultra-fast query execution.
• Payment & Fintech Integrations: Connecting secure payment processors, core financial gateways, or Web3/crypto payment servers (BTC/USDT/USDC).
• Cloud & Devops: Containerization (Docker), CI/CD pipelines, and cloud infrastructure deployment for maximum uptime.

Why work with me?
I don't just write code; I design systems engineered for real-world growth and security. I offer transparent communication, predictable delivery timelines, and direct collaboration.

*Payment Notice: To streamline international contracts and accelerate project kickoff, I accept direct global settlements via stablecoins (USDT/USDC) and Bitcoin (BTC).*

Working hours

  • Monday:08h00 To 18h00
  • Tuesday:08h00 To 18h00
  • Wednesday:08h00 To 18h00
  • Thursday:08h00 To 18h00
  • Friday:08h00 To 18h00
  • Saturday:Not available
  • Sunday:Not available
  • Embedded Software & Firmware Design
    Professional low-level programming for hardware automation and IoT devices. I develop reliable and optimized firmware in C/C++ for microcontrollers, integrating standard communication protocols ...
  • Fintech & Crypto Payment Integration
    Securely connect your software to the financial world. I specialize in integrating international payment gateways, core fintech solutions (including ISO 8583 standards), and native Web3/crypto ...
  • Senior Backend & API Developer
    Senior Backend & API Developer
     40 $  - Per hour
    Need a rock-solid server-side solution? I design and deploy high-performance RESTful/GraphQL APIs, microservices architectures, and robust backend logic. Optimized for high data loads, security, and ...
  • 🇬🇧 English
  • 🇪🇸 Spanish
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