Games, apps and backends built to hold up under real load.

I'm Julio, and Corenvil is my independent software studio. I forge games, apps, and backend services with the same rigor as tuning an online engine piece by piece, built to scale.

Let's talk See Bitahi
Corenvil emblem: an anvil with a glowing core

Three crafts, one anvil

Each branch of Corenvil specializes, but shares the same technical foundation: systems built to hold up under real load.

Corenvil Games

End-to-end indie development: game systems design, economy, netcode, and everything that makes a world feel alive and persistent.

Game in development

Corenvil Apps

Native Android apps, crafted end-to-end: from the interface to the infrastructure that keeps them running in production.

Bitahi, access on request

Corenvil Web

Backends, APIs, and web services built to scale: authentication, reputation systems, cloud infrastructure.

Open for commissions

Bitahi

Own project · Android app

A strength training tracking app, designed to log your workout sessions without friction - simple where it matters, precise where it counts.

  • Quick logging of sets, weight, and reps, no paper
  • Personal records, streaks, and weekly volume at a glance
  • Routines adapted to your equipment and level: gym, home, or no equipment
Request access
Bitahi home screen with today's workout, Chest + Triceps, and the weekly goal Bench press progress chart with a 92.5 kg personal record Bitahi screen showing the steps to log weight and reps Bitahi weekly planner with Monday's Chest + Triceps routine

Behind Corenvil

Julio

Senior Backend Engineer - Founder

Experience
15+ years of experience
Based in
Barcelona, Spain
Background
Five years building critical online systems at scale: account authentication and backend services in production for millions of users.
Stack
C#, TypeScript, Python, .NET, ASP.NET Core, FastAPI, React, AWS, Azure, Docker, Unity 3D
Approach
  • Systems built for real-world scale
  • Security by design
  • Product with judgment, not by trend

Have a project in mind?

Tell me what you're building. I reply in person - no automated forms lost in limbo.